3144 lines
100 KiB
C
3144 lines
100 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) Blender Foundation.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): Daniel Genrich
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* Blender Foundation
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/blenkernel/intern/smoke.c
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* \ingroup bke
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*/
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/* Part of the code copied from elbeem fluid library, copyright by Nils Thuerey */
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#include "MEM_guardedalloc.h"
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#include <float.h>
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#include <math.h>
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#include <stdio.h>
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#include <string.h> /* memset */
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#include "BLI_blenlib.h"
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#include "BLI_math.h"
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#include "BLI_kdtree.h"
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#include "BLI_kdopbvh.h"
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#include "BLI_task.h"
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#include "BLI_threads.h"
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#include "BLI_utildefines.h"
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#include "BLI_voxel.h"
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#include "DNA_anim_types.h"
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#include "DNA_armature_types.h"
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#include "DNA_constraint_types.h"
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#include "DNA_customdata_types.h"
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#include "DNA_lamp_types.h"
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#include "DNA_meshdata_types.h"
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#include "DNA_modifier_types.h"
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#include "DNA_object_types.h"
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#include "DNA_particle_types.h"
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#include "DNA_scene_types.h"
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#include "DNA_smoke_types.h"
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#include "BKE_appdir.h"
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#include "BKE_animsys.h"
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#include "BKE_armature.h"
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#include "BKE_bvhutils.h"
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#include "BKE_cdderivedmesh.h"
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#include "BKE_collision.h"
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#include "BKE_colortools.h"
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#include "BKE_constraint.h"
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#include "BKE_customdata.h"
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#include "BKE_deform.h"
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#include "BKE_depsgraph.h"
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#include "BKE_DerivedMesh.h"
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#include "BKE_effect.h"
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#include "BKE_global.h"
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#include "BKE_main.h"
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#include "BKE_modifier.h"
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#include "BKE_object.h"
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#include "BKE_particle.h"
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#include "BKE_pointcache.h"
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#include "BKE_scene.h"
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#include "BKE_smoke.h"
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#include "BKE_texture.h"
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#include "RE_shader_ext.h"
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#include "GPU_glew.h"
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/* UNUSED so far, may be enabled later */
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/* #define USE_SMOKE_COLLISION_DM */
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//#define DEBUG_TIME
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#ifdef DEBUG_TIME
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# include "PIL_time.h"
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#endif
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#include "smoke_API.h"
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#ifdef WITH_SMOKE
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static ThreadMutex object_update_lock = BLI_MUTEX_INITIALIZER;
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struct Object;
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struct Scene;
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struct DerivedMesh;
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struct SmokeModifierData;
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// timestep default value for nice appearance 0.1f
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#define DT_DEFAULT 0.1f
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#define ADD_IF_LOWER_POS(a, b) (min_ff((a) + (b), max_ff((a), (b))))
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#define ADD_IF_LOWER_NEG(a, b) (max_ff((a) + (b), min_ff((a), (b))))
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#define ADD_IF_LOWER(a, b) (((b) > 0) ? ADD_IF_LOWER_POS((a), (b)) : ADD_IF_LOWER_NEG((a), (b)))
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#else /* WITH_SMOKE */
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/* Stubs to use when smoke is disabled */
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struct WTURBULENCE *smoke_turbulence_init(int *UNUSED(res), int UNUSED(amplify), int UNUSED(noisetype), const char *UNUSED(noisefile_path), int UNUSED(use_fire), int UNUSED(use_colors)) { return NULL; }
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//struct FLUID_3D *smoke_init(int *UNUSED(res), float *UNUSED(dx), float *UNUSED(dtdef), int UNUSED(use_heat), int UNUSED(use_fire), int UNUSED(use_colors)) { return NULL; }
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void smoke_free(struct FLUID_3D *UNUSED(fluid)) {}
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float *smoke_get_density(struct FLUID_3D *UNUSED(fluid)) { return NULL; }
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void smoke_turbulence_free(struct WTURBULENCE *UNUSED(wt)) {}
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void smoke_initWaveletBlenderRNA(struct WTURBULENCE *UNUSED(wt), float *UNUSED(strength)) {}
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void smoke_initBlenderRNA(struct FLUID_3D *UNUSED(fluid), float *UNUSED(alpha), float *UNUSED(beta), float *UNUSED(dt_factor), float *UNUSED(vorticity),
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int *UNUSED(border_colli), float *UNUSED(burning_rate), float *UNUSED(flame_smoke), float *UNUSED(flame_smoke_color),
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float *UNUSED(flame_vorticity), float *UNUSED(flame_ignition_temp), float *UNUSED(flame_max_temp)) {}
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struct DerivedMesh *smokeModifier_do(SmokeModifierData *UNUSED(smd), Scene *UNUSED(scene), Object *UNUSED(ob), DerivedMesh *UNUSED(dm)) { return NULL; }
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float smoke_get_velocity_at(struct Object *UNUSED(ob), float UNUSED(position[3]), float UNUSED(velocity[3])) { return 0.0f; }
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#endif /* WITH_SMOKE */
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#ifdef WITH_SMOKE
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void smoke_reallocate_fluid(SmokeDomainSettings *sds, float dx, int res[3], int free_old)
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{
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int use_heat = (sds->active_fields & SM_ACTIVE_HEAT);
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int use_fire = (sds->active_fields & SM_ACTIVE_FIRE);
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int use_colors = (sds->active_fields & SM_ACTIVE_COLORS);
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if (free_old && sds->fluid)
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smoke_free(sds->fluid);
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if (!min_iii(res[0], res[1], res[2])) {
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sds->fluid = NULL;
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return;
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}
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sds->fluid = smoke_init(res, dx, DT_DEFAULT, use_heat, use_fire, use_colors);
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smoke_initBlenderRNA(sds->fluid, &(sds->alpha), &(sds->beta), &(sds->time_scale), &(sds->vorticity), &(sds->border_collisions),
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&(sds->burning_rate), &(sds->flame_smoke), sds->flame_smoke_color, &(sds->flame_vorticity), &(sds->flame_ignition), &(sds->flame_max_temp));
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/* reallocate shadow buffer */
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if (sds->shadow)
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MEM_freeN(sds->shadow);
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sds->shadow = MEM_callocN(sizeof(float) * res[0] * res[1] * res[2], "SmokeDomainShadow");
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}
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void smoke_reallocate_highres_fluid(SmokeDomainSettings *sds, float dx, int res[3], int free_old)
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{
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int use_fire = (sds->active_fields & (SM_ACTIVE_HEAT | SM_ACTIVE_FIRE));
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int use_colors = (sds->active_fields & SM_ACTIVE_COLORS);
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if (free_old && sds->wt)
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smoke_turbulence_free(sds->wt);
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if (!min_iii(res[0], res[1], res[2])) {
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sds->wt = NULL;
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return;
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}
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/* smoke_turbulence_init uses non-threadsafe functions from fftw3 lib (like fftw_plan & co). */
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BLI_thread_lock(LOCK_FFTW);
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sds->wt = smoke_turbulence_init(res, sds->amplify + 1, sds->noise, BKE_tempdir_session(), use_fire, use_colors);
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BLI_thread_unlock(LOCK_FFTW);
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sds->res_wt[0] = res[0] * (sds->amplify + 1);
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sds->res_wt[1] = res[1] * (sds->amplify + 1);
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sds->res_wt[2] = res[2] * (sds->amplify + 1);
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sds->dx_wt = dx / (sds->amplify + 1);
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smoke_initWaveletBlenderRNA(sds->wt, &(sds->strength));
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}
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/* convert global position to domain cell space */
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static void smoke_pos_to_cell(SmokeDomainSettings *sds, float pos[3])
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{
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mul_m4_v3(sds->imat, pos);
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sub_v3_v3(pos, sds->p0);
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pos[0] *= 1.0f / sds->cell_size[0];
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pos[1] *= 1.0f / sds->cell_size[1];
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pos[2] *= 1.0f / sds->cell_size[2];
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}
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/* set domain transformations and base resolution from object derivedmesh */
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static void smoke_set_domain_from_derivedmesh(SmokeDomainSettings *sds, Object *ob, DerivedMesh *dm, bool init_resolution)
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{
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size_t i;
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float min[3] = {FLT_MAX, FLT_MAX, FLT_MAX}, max[3] = {-FLT_MAX, -FLT_MAX, -FLT_MAX};
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float size[3];
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MVert *verts = dm->getVertArray(dm);
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float scale = 0.0;
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int res;
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res = sds->maxres;
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// get BB of domain
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for (i = 0; i < dm->getNumVerts(dm); i++)
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{
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// min BB
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min[0] = MIN2(min[0], verts[i].co[0]);
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min[1] = MIN2(min[1], verts[i].co[1]);
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min[2] = MIN2(min[2], verts[i].co[2]);
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// max BB
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max[0] = MAX2(max[0], verts[i].co[0]);
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max[1] = MAX2(max[1], verts[i].co[1]);
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max[2] = MAX2(max[2], verts[i].co[2]);
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}
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/* set domain bounds */
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copy_v3_v3(sds->p0, min);
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copy_v3_v3(sds->p1, max);
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sds->dx = 1.0f / res;
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/* calculate domain dimensions */
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sub_v3_v3v3(size, max, min);
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if (init_resolution) {
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zero_v3_int(sds->base_res);
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copy_v3_v3(sds->cell_size, size);
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}
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/* apply object scale */
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for (i = 0; i < 3; i++) {
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size[i] = fabsf(size[i] * ob->size[i]);
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}
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copy_v3_v3(sds->global_size, size);
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copy_v3_v3(sds->dp0, min);
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invert_m4_m4(sds->imat, ob->obmat);
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// prevent crash when initializing a plane as domain
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if (!init_resolution || (size[0] < FLT_EPSILON) || (size[1] < FLT_EPSILON) || (size[2] < FLT_EPSILON))
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return;
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/* define grid resolutions from longest domain side */
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if (size[0] >= MAX2(size[1], size[2])) {
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scale = res / size[0];
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sds->scale = size[0] / fabsf(ob->size[0]);
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sds->base_res[0] = res;
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sds->base_res[1] = max_ii((int)(size[1] * scale + 0.5f), 4);
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sds->base_res[2] = max_ii((int)(size[2] * scale + 0.5f), 4);
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}
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else if (size[1] >= MAX2(size[0], size[2])) {
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scale = res / size[1];
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sds->scale = size[1] / fabsf(ob->size[1]);
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sds->base_res[0] = max_ii((int)(size[0] * scale + 0.5f), 4);
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sds->base_res[1] = res;
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sds->base_res[2] = max_ii((int)(size[2] * scale + 0.5f), 4);
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}
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else {
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scale = res / size[2];
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sds->scale = size[2] / fabsf(ob->size[2]);
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sds->base_res[0] = max_ii((int)(size[0] * scale + 0.5f), 4);
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sds->base_res[1] = max_ii((int)(size[1] * scale + 0.5f), 4);
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sds->base_res[2] = res;
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}
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/* set cell size */
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sds->cell_size[0] /= (float)sds->base_res[0];
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sds->cell_size[1] /= (float)sds->base_res[1];
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sds->cell_size[2] /= (float)sds->base_res[2];
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}
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static int smokeModifier_init(SmokeModifierData *smd, Object *ob, Scene *scene, DerivedMesh *dm)
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{
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if ((smd->type & MOD_SMOKE_TYPE_DOMAIN) && smd->domain && !smd->domain->fluid)
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{
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SmokeDomainSettings *sds = smd->domain;
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int res[3];
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/* set domain dimensions from derivedmesh */
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smoke_set_domain_from_derivedmesh(sds, ob, dm, true);
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/* reset domain values */
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zero_v3_int(sds->shift);
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zero_v3(sds->shift_f);
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add_v3_fl(sds->shift_f, 0.5f);
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zero_v3(sds->prev_loc);
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mul_m4_v3(ob->obmat, sds->prev_loc);
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copy_m4_m4(sds->obmat, ob->obmat);
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/* set resolutions */
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if (smd->domain->flags & MOD_SMOKE_ADAPTIVE_DOMAIN) {
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res[0] = res[1] = res[2] = 1; /* use minimum res for adaptive init */
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}
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else {
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VECCOPY(res, sds->base_res);
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}
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VECCOPY(sds->res, res);
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sds->total_cells = sds->res[0] * sds->res[1] * sds->res[2];
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sds->res_min[0] = sds->res_min[1] = sds->res_min[2] = 0;
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VECCOPY(sds->res_max, res);
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/* allocate fluid */
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smoke_reallocate_fluid(sds, sds->dx, sds->res, 0);
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smd->time = scene->r.cfra;
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/* allocate highres fluid */
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if (sds->flags & MOD_SMOKE_HIGHRES) {
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smoke_reallocate_highres_fluid(sds, sds->dx, sds->res, 0);
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}
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/* allocate shadow buffer */
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if (!sds->shadow)
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sds->shadow = MEM_callocN(sizeof(float) * sds->res[0] * sds->res[1] * sds->res[2], "SmokeDomainShadow");
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return 1;
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}
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else if ((smd->type & MOD_SMOKE_TYPE_FLOW) && smd->flow)
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{
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smd->time = scene->r.cfra;
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return 1;
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}
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else if ((smd->type & MOD_SMOKE_TYPE_COLL))
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{
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if (!smd->coll)
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{
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smokeModifier_createType(smd);
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}
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smd->time = scene->r.cfra;
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return 1;
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}
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return 2;
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}
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#endif /* WITH_SMOKE */
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static void smokeModifier_freeDomain(SmokeModifierData *smd)
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{
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if (smd->domain)
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{
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if (smd->domain->shadow)
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MEM_freeN(smd->domain->shadow);
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smd->domain->shadow = NULL;
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if (smd->domain->fluid)
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smoke_free(smd->domain->fluid);
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if (smd->domain->fluid_mutex)
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BLI_rw_mutex_free(smd->domain->fluid_mutex);
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if (smd->domain->wt)
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smoke_turbulence_free(smd->domain->wt);
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if (smd->domain->effector_weights)
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MEM_freeN(smd->domain->effector_weights);
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smd->domain->effector_weights = NULL;
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BKE_ptcache_free_list(&(smd->domain->ptcaches[0]));
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smd->domain->point_cache[0] = NULL;
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if (smd->domain->coba) {
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MEM_freeN(smd->domain->coba);
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}
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MEM_freeN(smd->domain);
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smd->domain = NULL;
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}
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}
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static void smokeModifier_freeFlow(SmokeModifierData *smd)
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{
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if (smd->flow)
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{
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if (smd->flow->dm) smd->flow->dm->release(smd->flow->dm);
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if (smd->flow->verts_old) MEM_freeN(smd->flow->verts_old);
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MEM_freeN(smd->flow);
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smd->flow = NULL;
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}
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}
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static void smokeModifier_freeCollision(SmokeModifierData *smd)
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{
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if (smd->coll)
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{
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SmokeCollSettings *scs = smd->coll;
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if (scs->numverts)
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{
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if (scs->verts_old)
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{
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MEM_freeN(scs->verts_old);
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scs->verts_old = NULL;
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}
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}
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if (smd->coll->dm)
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smd->coll->dm->release(smd->coll->dm);
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smd->coll->dm = NULL;
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MEM_freeN(smd->coll);
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smd->coll = NULL;
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}
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}
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void smokeModifier_reset_turbulence(struct SmokeModifierData *smd)
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{
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if (smd && smd->domain && smd->domain->wt)
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{
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smoke_turbulence_free(smd->domain->wt);
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smd->domain->wt = NULL;
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}
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}
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static void smokeModifier_reset_ex(struct SmokeModifierData *smd, bool need_lock)
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{
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if (smd)
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{
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if (smd->domain)
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{
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if (smd->domain->shadow)
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MEM_freeN(smd->domain->shadow);
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smd->domain->shadow = NULL;
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if (smd->domain->fluid)
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{
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if (need_lock)
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BLI_rw_mutex_lock(smd->domain->fluid_mutex, THREAD_LOCK_WRITE);
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smoke_free(smd->domain->fluid);
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smd->domain->fluid = NULL;
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if (need_lock)
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BLI_rw_mutex_unlock(smd->domain->fluid_mutex);
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}
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smokeModifier_reset_turbulence(smd);
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smd->time = -1;
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smd->domain->total_cells = 0;
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smd->domain->active_fields = 0;
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}
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else if (smd->flow)
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{
|
|
if (smd->flow->verts_old) MEM_freeN(smd->flow->verts_old);
|
|
smd->flow->verts_old = NULL;
|
|
smd->flow->numverts = 0;
|
|
}
|
|
else if (smd->coll)
|
|
{
|
|
SmokeCollSettings *scs = smd->coll;
|
|
|
|
if (scs->numverts && scs->verts_old)
|
|
{
|
|
MEM_freeN(scs->verts_old);
|
|
scs->verts_old = NULL;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void smokeModifier_reset(struct SmokeModifierData *smd)
|
|
{
|
|
smokeModifier_reset_ex(smd, true);
|
|
}
|
|
|
|
void smokeModifier_free(SmokeModifierData *smd)
|
|
{
|
|
if (smd)
|
|
{
|
|
smokeModifier_freeDomain(smd);
|
|
smokeModifier_freeFlow(smd);
|
|
smokeModifier_freeCollision(smd);
|
|
}
|
|
}
|
|
|
|
void smokeModifier_createType(struct SmokeModifierData *smd)
|
|
{
|
|
if (smd)
|
|
{
|
|
if (smd->type & MOD_SMOKE_TYPE_DOMAIN)
|
|
{
|
|
if (smd->domain)
|
|
smokeModifier_freeDomain(smd);
|
|
|
|
smd->domain = MEM_callocN(sizeof(SmokeDomainSettings), "SmokeDomain");
|
|
|
|
smd->domain->smd = smd;
|
|
|
|
smd->domain->point_cache[0] = BKE_ptcache_add(&(smd->domain->ptcaches[0]));
|
|
smd->domain->point_cache[0]->flag |= PTCACHE_DISK_CACHE;
|
|
smd->domain->point_cache[0]->step = 1;
|
|
|
|
/* Deprecated */
|
|
smd->domain->point_cache[1] = NULL;
|
|
BLI_listbase_clear(&smd->domain->ptcaches[1]);
|
|
/* set some standard values */
|
|
smd->domain->fluid = NULL;
|
|
smd->domain->fluid_mutex = BLI_rw_mutex_alloc();
|
|
smd->domain->wt = NULL;
|
|
smd->domain->eff_group = NULL;
|
|
smd->domain->fluid_group = NULL;
|
|
smd->domain->coll_group = NULL;
|
|
smd->domain->maxres = 32;
|
|
smd->domain->amplify = 1;
|
|
smd->domain->alpha = -0.001;
|
|
smd->domain->beta = 0.1;
|
|
smd->domain->time_scale = 1.0;
|
|
smd->domain->vorticity = 2.0;
|
|
smd->domain->border_collisions = SM_BORDER_OPEN; // open domain
|
|
smd->domain->flags = MOD_SMOKE_DISSOLVE_LOG;
|
|
smd->domain->highres_sampling = SM_HRES_FULLSAMPLE;
|
|
smd->domain->strength = 2.0;
|
|
smd->domain->noise = MOD_SMOKE_NOISEWAVE;
|
|
smd->domain->diss_speed = 5;
|
|
smd->domain->active_fields = 0;
|
|
|
|
smd->domain->adapt_margin = 4;
|
|
smd->domain->adapt_res = 0;
|
|
smd->domain->adapt_threshold = 0.02f;
|
|
|
|
smd->domain->burning_rate = 0.75f;
|
|
smd->domain->flame_smoke = 1.0f;
|
|
smd->domain->flame_vorticity = 0.5f;
|
|
smd->domain->flame_ignition = 1.5f;
|
|
smd->domain->flame_max_temp = 3.0f;
|
|
/* color */
|
|
smd->domain->flame_smoke_color[0] = 0.7f;
|
|
smd->domain->flame_smoke_color[1] = 0.7f;
|
|
smd->domain->flame_smoke_color[2] = 0.7f;
|
|
|
|
smd->domain->viewsettings = MOD_SMOKE_VIEW_SHOWBIG;
|
|
smd->domain->effector_weights = BKE_add_effector_weights(NULL);
|
|
|
|
#ifdef WITH_OPENVDB_BLOSC
|
|
smd->domain->openvdb_comp = VDB_COMPRESSION_BLOSC;
|
|
#else
|
|
smd->domain->openvdb_comp = VDB_COMPRESSION_ZIP;
|
|
#endif
|
|
smd->domain->data_depth = 0;
|
|
smd->domain->cache_file_format = PTCACHE_FILE_PTCACHE;
|
|
|
|
smd->domain->display_thickness = 1.0f;
|
|
smd->domain->slice_method = MOD_SMOKE_SLICE_VIEW_ALIGNED;
|
|
smd->domain->axis_slice_method = AXIS_SLICE_FULL;
|
|
smd->domain->slice_per_voxel = 5.0f;
|
|
smd->domain->slice_depth = 0.5f;
|
|
smd->domain->slice_axis = 0;
|
|
smd->domain->vector_scale = 1.0f;
|
|
|
|
smd->domain->coba = NULL;
|
|
smd->domain->coba_field = FLUID_FIELD_DENSITY;
|
|
|
|
smd->domain->clipping = 1e-3f;
|
|
}
|
|
else if (smd->type & MOD_SMOKE_TYPE_FLOW)
|
|
{
|
|
if (smd->flow)
|
|
smokeModifier_freeFlow(smd);
|
|
|
|
smd->flow = MEM_callocN(sizeof(SmokeFlowSettings), "SmokeFlow");
|
|
|
|
smd->flow->smd = smd;
|
|
|
|
/* set some standard values */
|
|
smd->flow->density = 1.0f;
|
|
smd->flow->fuel_amount = 1.0f;
|
|
smd->flow->temp = 1.0f;
|
|
smd->flow->flags = MOD_SMOKE_FLOW_ABSOLUTE | MOD_SMOKE_FLOW_USE_PART_SIZE;
|
|
smd->flow->vel_multi = 1.0f;
|
|
smd->flow->volume_density = 0.0f;
|
|
smd->flow->surface_distance = 1.5f;
|
|
smd->flow->source = MOD_SMOKE_FLOW_SOURCE_MESH;
|
|
smd->flow->texture_size = 1.0f;
|
|
smd->flow->particle_size = 1.0f;
|
|
smd->flow->subframes = 0;
|
|
|
|
smd->flow->color[0] = 0.7f;
|
|
smd->flow->color[1] = 0.7f;
|
|
smd->flow->color[2] = 0.7f;
|
|
|
|
smd->flow->dm = NULL;
|
|
smd->flow->psys = NULL;
|
|
|
|
}
|
|
else if (smd->type & MOD_SMOKE_TYPE_COLL)
|
|
{
|
|
if (smd->coll)
|
|
smokeModifier_freeCollision(smd);
|
|
|
|
smd->coll = MEM_callocN(sizeof(SmokeCollSettings), "SmokeColl");
|
|
|
|
smd->coll->smd = smd;
|
|
smd->coll->verts_old = NULL;
|
|
smd->coll->numverts = 0;
|
|
smd->coll->type = 0; // static obstacle
|
|
smd->coll->dm = NULL;
|
|
|
|
#ifdef USE_SMOKE_COLLISION_DM
|
|
smd->coll->dm = NULL;
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
void smokeModifier_copy(const struct SmokeModifierData *smd, struct SmokeModifierData *tsmd)
|
|
{
|
|
tsmd->type = smd->type;
|
|
tsmd->time = smd->time;
|
|
|
|
smokeModifier_createType(tsmd);
|
|
|
|
if (tsmd->domain) {
|
|
tsmd->domain->fluid_group = smd->domain->fluid_group;
|
|
tsmd->domain->coll_group = smd->domain->coll_group;
|
|
|
|
tsmd->domain->adapt_margin = smd->domain->adapt_margin;
|
|
tsmd->domain->adapt_res = smd->domain->adapt_res;
|
|
tsmd->domain->adapt_threshold = smd->domain->adapt_threshold;
|
|
|
|
tsmd->domain->alpha = smd->domain->alpha;
|
|
tsmd->domain->beta = smd->domain->beta;
|
|
tsmd->domain->amplify = smd->domain->amplify;
|
|
tsmd->domain->maxres = smd->domain->maxres;
|
|
tsmd->domain->flags = smd->domain->flags;
|
|
tsmd->domain->highres_sampling = smd->domain->highres_sampling;
|
|
tsmd->domain->viewsettings = smd->domain->viewsettings;
|
|
tsmd->domain->noise = smd->domain->noise;
|
|
tsmd->domain->diss_speed = smd->domain->diss_speed;
|
|
tsmd->domain->strength = smd->domain->strength;
|
|
|
|
tsmd->domain->border_collisions = smd->domain->border_collisions;
|
|
tsmd->domain->vorticity = smd->domain->vorticity;
|
|
tsmd->domain->time_scale = smd->domain->time_scale;
|
|
|
|
tsmd->domain->burning_rate = smd->domain->burning_rate;
|
|
tsmd->domain->flame_smoke = smd->domain->flame_smoke;
|
|
tsmd->domain->flame_vorticity = smd->domain->flame_vorticity;
|
|
tsmd->domain->flame_ignition = smd->domain->flame_ignition;
|
|
tsmd->domain->flame_max_temp = smd->domain->flame_max_temp;
|
|
copy_v3_v3(tsmd->domain->flame_smoke_color, smd->domain->flame_smoke_color);
|
|
|
|
MEM_freeN(tsmd->domain->effector_weights);
|
|
tsmd->domain->effector_weights = MEM_dupallocN(smd->domain->effector_weights);
|
|
tsmd->domain->openvdb_comp = smd->domain->openvdb_comp;
|
|
tsmd->domain->data_depth = smd->domain->data_depth;
|
|
tsmd->domain->cache_file_format = smd->domain->cache_file_format;
|
|
|
|
tsmd->domain->slice_method = smd->domain->slice_method;
|
|
tsmd->domain->axis_slice_method = smd->domain->axis_slice_method;
|
|
tsmd->domain->slice_per_voxel = smd->domain->slice_per_voxel;
|
|
tsmd->domain->slice_depth = smd->domain->slice_depth;
|
|
tsmd->domain->slice_axis = smd->domain->slice_axis;
|
|
tsmd->domain->draw_velocity = smd->domain->draw_velocity;
|
|
tsmd->domain->vector_draw_type = smd->domain->vector_draw_type;
|
|
tsmd->domain->vector_scale = smd->domain->vector_scale;
|
|
|
|
if (smd->domain->coba) {
|
|
tsmd->domain->coba = MEM_dupallocN(smd->domain->coba);
|
|
}
|
|
}
|
|
else if (tsmd->flow) {
|
|
tsmd->flow->psys = smd->flow->psys;
|
|
tsmd->flow->noise_texture = smd->flow->noise_texture;
|
|
|
|
tsmd->flow->vel_multi = smd->flow->vel_multi;
|
|
tsmd->flow->vel_normal = smd->flow->vel_normal;
|
|
tsmd->flow->vel_random = smd->flow->vel_random;
|
|
|
|
tsmd->flow->density = smd->flow->density;
|
|
copy_v3_v3(tsmd->flow->color, smd->flow->color);
|
|
tsmd->flow->fuel_amount = smd->flow->fuel_amount;
|
|
tsmd->flow->temp = smd->flow->temp;
|
|
tsmd->flow->volume_density = smd->flow->volume_density;
|
|
tsmd->flow->surface_distance = smd->flow->surface_distance;
|
|
tsmd->flow->particle_size = smd->flow->particle_size;
|
|
tsmd->flow->subframes = smd->flow->subframes;
|
|
|
|
tsmd->flow->texture_size = smd->flow->texture_size;
|
|
tsmd->flow->texture_offset = smd->flow->texture_offset;
|
|
BLI_strncpy(tsmd->flow->uvlayer_name, smd->flow->uvlayer_name, sizeof(tsmd->flow->uvlayer_name));
|
|
tsmd->flow->vgroup_density = smd->flow->vgroup_density;
|
|
|
|
tsmd->flow->type = smd->flow->type;
|
|
tsmd->flow->source = smd->flow->source;
|
|
tsmd->flow->texture_type = smd->flow->texture_type;
|
|
tsmd->flow->flags = smd->flow->flags;
|
|
}
|
|
else if (tsmd->coll) {
|
|
/* leave it as initialized, collision settings is mostly caches */
|
|
}
|
|
}
|
|
|
|
#ifdef WITH_SMOKE
|
|
|
|
// forward decleration
|
|
static void smoke_calc_transparency(SmokeDomainSettings *sds, Scene *scene);
|
|
static float calc_voxel_transp(float *result, float *input, int res[3], int *pixel, float *tRay, float correct);
|
|
|
|
static int get_lamp(Scene *scene, float *light)
|
|
{
|
|
Base *base_tmp = NULL;
|
|
int found_lamp = 0;
|
|
|
|
// try to find a lamp, preferably local
|
|
for (base_tmp = scene->base.first; base_tmp; base_tmp = base_tmp->next) {
|
|
if (base_tmp->object->type == OB_LAMP) {
|
|
Lamp *la = base_tmp->object->data;
|
|
|
|
if (la->type == LA_LOCAL) {
|
|
copy_v3_v3(light, base_tmp->object->obmat[3]);
|
|
return 1;
|
|
}
|
|
else if (!found_lamp) {
|
|
copy_v3_v3(light, base_tmp->object->obmat[3]);
|
|
found_lamp = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return found_lamp;
|
|
}
|
|
|
|
/**********************************************************
|
|
* Obstacles
|
|
**********************************************************/
|
|
|
|
typedef struct ObstaclesFromDMData {
|
|
SmokeDomainSettings *sds;
|
|
const MVert *mvert;
|
|
const MLoop *mloop;
|
|
const MLoopTri *looptri;
|
|
BVHTreeFromMesh *tree;
|
|
unsigned char *obstacle_map;
|
|
|
|
bool has_velocity;
|
|
float *vert_vel;
|
|
float *velocityX, *velocityY, *velocityZ;
|
|
int *num_obstacles;
|
|
} ObstaclesFromDMData;
|
|
|
|
static void obstacles_from_derivedmesh_task_cb(
|
|
void *__restrict userdata,
|
|
const int z,
|
|
const ParallelRangeTLS *__restrict UNUSED(tls))
|
|
{
|
|
ObstaclesFromDMData *data = userdata;
|
|
SmokeDomainSettings *sds = data->sds;
|
|
|
|
/* slightly rounded-up sqrt(3 * (0.5)^2) == max. distance of cell boundary along the diagonal */
|
|
const float surface_distance = 0.867f;
|
|
|
|
for (int x = sds->res_min[0]; x < sds->res_max[0]; x++) {
|
|
for (int y = sds->res_min[1]; y < sds->res_max[1]; y++) {
|
|
const int index = smoke_get_index(x - sds->res_min[0], sds->res[0], y - sds->res_min[1], sds->res[1], z - sds->res_min[2]);
|
|
|
|
float ray_start[3] = {(float)x + 0.5f, (float)y + 0.5f, (float)z + 0.5f};
|
|
BVHTreeNearest nearest = {0};
|
|
nearest.index = -1;
|
|
nearest.dist_sq = surface_distance * surface_distance; /* find_nearest uses squared distance */
|
|
|
|
/* find the nearest point on the mesh */
|
|
if (BLI_bvhtree_find_nearest(data->tree->tree, ray_start, &nearest, data->tree->nearest_callback, data->tree) != -1) {
|
|
const MLoopTri *lt = &data->looptri[nearest.index];
|
|
float weights[3];
|
|
int v1, v2, v3;
|
|
|
|
/* calculate barycentric weights for nearest point */
|
|
v1 = data->mloop[lt->tri[0]].v;
|
|
v2 = data->mloop[lt->tri[1]].v;
|
|
v3 = data->mloop[lt->tri[2]].v;
|
|
interp_weights_tri_v3(weights, data->mvert[v1].co, data->mvert[v2].co, data->mvert[v3].co, nearest.co);
|
|
|
|
// DG TODO
|
|
if (data->has_velocity)
|
|
{
|
|
/* apply object velocity */
|
|
{
|
|
float hit_vel[3];
|
|
interp_v3_v3v3v3(hit_vel, &data->vert_vel[v1 * 3], &data->vert_vel[v2 * 3], &data->vert_vel[v3 * 3], weights);
|
|
data->velocityX[index] += hit_vel[0];
|
|
data->velocityY[index] += hit_vel[1];
|
|
data->velocityZ[index] += hit_vel[2];
|
|
}
|
|
}
|
|
|
|
/* tag obstacle cells */
|
|
data->obstacle_map[index] = 1;
|
|
|
|
if (data->has_velocity) {
|
|
data->obstacle_map[index] |= 8;
|
|
data->num_obstacles[index]++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void obstacles_from_derivedmesh(
|
|
Object *coll_ob, SmokeDomainSettings *sds, SmokeCollSettings *scs,
|
|
unsigned char *obstacle_map, float *velocityX, float *velocityY, float *velocityZ, int *num_obstacles, float dt)
|
|
{
|
|
if (!scs->dm) return;
|
|
{
|
|
DerivedMesh *dm = NULL;
|
|
MVert *mvert = NULL;
|
|
const MLoopTri *looptri;
|
|
const MLoop *mloop;
|
|
BVHTreeFromMesh treeData = {NULL};
|
|
int numverts, i;
|
|
|
|
float *vert_vel = NULL;
|
|
bool has_velocity = false;
|
|
|
|
dm = CDDM_copy(scs->dm);
|
|
CDDM_calc_normals(dm);
|
|
mvert = dm->getVertArray(dm);
|
|
mloop = dm->getLoopArray(dm);
|
|
looptri = dm->getLoopTriArray(dm);
|
|
numverts = dm->getNumVerts(dm);
|
|
|
|
// DG TODO
|
|
// if (scs->type > SM_COLL_STATIC)
|
|
// if line above is used, the code is in trouble if the object moves but is declared as "does not move"
|
|
|
|
{
|
|
vert_vel = MEM_callocN(sizeof(float) * numverts * 3, "smoke_obs_velocity");
|
|
|
|
if (scs->numverts != numverts || !scs->verts_old) {
|
|
if (scs->verts_old) MEM_freeN(scs->verts_old);
|
|
|
|
scs->verts_old = MEM_callocN(sizeof(float) * numverts * 3, "smoke_obs_verts_old");
|
|
scs->numverts = numverts;
|
|
}
|
|
else {
|
|
has_velocity = true;
|
|
}
|
|
}
|
|
|
|
/* Transform collider vertices to
|
|
* domain grid space for fast lookups */
|
|
for (i = 0; i < numverts; i++) {
|
|
float n[3];
|
|
float co[3];
|
|
|
|
/* vert pos */
|
|
mul_m4_v3(coll_ob->obmat, mvert[i].co);
|
|
smoke_pos_to_cell(sds, mvert[i].co);
|
|
|
|
/* vert normal */
|
|
normal_short_to_float_v3(n, mvert[i].no);
|
|
mul_mat3_m4_v3(coll_ob->obmat, n);
|
|
mul_mat3_m4_v3(sds->imat, n);
|
|
normalize_v3(n);
|
|
normal_float_to_short_v3(mvert[i].no, n);
|
|
|
|
/* vert velocity */
|
|
VECADD(co, mvert[i].co, sds->shift);
|
|
if (has_velocity)
|
|
{
|
|
sub_v3_v3v3(&vert_vel[i * 3], co, &scs->verts_old[i * 3]);
|
|
mul_v3_fl(&vert_vel[i * 3], sds->dx / dt);
|
|
}
|
|
copy_v3_v3(&scs->verts_old[i * 3], co);
|
|
}
|
|
|
|
if (bvhtree_from_mesh_get(&treeData, dm, BVHTREE_FROM_LOOPTRI, 4)) {
|
|
ObstaclesFromDMData data = {
|
|
.sds = sds, .mvert = mvert, .mloop = mloop, .looptri = looptri,
|
|
.tree = &treeData, .obstacle_map = obstacle_map,
|
|
.has_velocity = has_velocity, .vert_vel = vert_vel,
|
|
.velocityX = velocityX, .velocityY = velocityY, .velocityZ = velocityZ,
|
|
.num_obstacles = num_obstacles
|
|
};
|
|
ParallelRangeSettings settings;
|
|
BLI_parallel_range_settings_defaults(&settings);
|
|
settings.scheduling_mode = TASK_SCHEDULING_DYNAMIC;
|
|
BLI_task_parallel_range(sds->res_min[2], sds->res_max[2],
|
|
&data,
|
|
obstacles_from_derivedmesh_task_cb,
|
|
&settings);
|
|
}
|
|
/* free bvh tree */
|
|
free_bvhtree_from_mesh(&treeData);
|
|
dm->release(dm);
|
|
|
|
if (vert_vel) MEM_freeN(vert_vel);
|
|
}
|
|
}
|
|
|
|
/* Animated obstacles: dx_step = ((x_new - x_old) / totalsteps) * substep */
|
|
static void update_obstacles(Scene *scene, Object *ob, SmokeDomainSettings *sds, float dt,
|
|
int UNUSED(substep), int UNUSED(totalsteps))
|
|
{
|
|
Object **collobjs = NULL;
|
|
unsigned int numcollobj = 0;
|
|
|
|
unsigned int collIndex;
|
|
unsigned char *obstacles = smoke_get_obstacle(sds->fluid);
|
|
float *velx = NULL;
|
|
float *vely = NULL;
|
|
float *velz = NULL;
|
|
float *velxOrig = smoke_get_velocity_x(sds->fluid);
|
|
float *velyOrig = smoke_get_velocity_y(sds->fluid);
|
|
float *velzOrig = smoke_get_velocity_z(sds->fluid);
|
|
float *density = smoke_get_density(sds->fluid);
|
|
float *fuel = smoke_get_fuel(sds->fluid);
|
|
float *flame = smoke_get_flame(sds->fluid);
|
|
float *r = smoke_get_color_r(sds->fluid);
|
|
float *g = smoke_get_color_g(sds->fluid);
|
|
float *b = smoke_get_color_b(sds->fluid);
|
|
unsigned int z;
|
|
|
|
int *num_obstacles = MEM_callocN(sizeof(int) * sds->res[0] * sds->res[1] * sds->res[2], "smoke_num_obstacles");
|
|
|
|
smoke_get_ob_velocity(sds->fluid, &velx, &vely, &velz);
|
|
|
|
// TODO: delete old obstacle flags
|
|
for (z = 0; z < sds->res[0] * sds->res[1] * sds->res[2]; z++)
|
|
{
|
|
if (obstacles[z] & 8) // Do not delete static obstacles
|
|
{
|
|
obstacles[z] = 0;
|
|
}
|
|
|
|
velx[z] = 0;
|
|
vely[z] = 0;
|
|
velz[z] = 0;
|
|
}
|
|
|
|
|
|
collobjs = get_collisionobjects(scene, ob, sds->coll_group, &numcollobj, eModifierType_Smoke);
|
|
|
|
// update obstacle tags in cells
|
|
for (collIndex = 0; collIndex < numcollobj; collIndex++)
|
|
{
|
|
Object *collob = collobjs[collIndex];
|
|
SmokeModifierData *smd2 = (SmokeModifierData *)modifiers_findByType(collob, eModifierType_Smoke);
|
|
|
|
// DG TODO: check if modifier is active?
|
|
|
|
if ((smd2->type & MOD_SMOKE_TYPE_COLL) && smd2->coll)
|
|
{
|
|
SmokeCollSettings *scs = smd2->coll;
|
|
obstacles_from_derivedmesh(collob, sds, scs, obstacles, velx, vely, velz, num_obstacles, dt);
|
|
}
|
|
}
|
|
|
|
if (collobjs)
|
|
MEM_freeN(collobjs);
|
|
|
|
/* obstacle cells should not contain any velocity from the smoke simulation */
|
|
for (z = 0; z < sds->res[0] * sds->res[1] * sds->res[2]; z++)
|
|
{
|
|
if (obstacles[z])
|
|
{
|
|
velxOrig[z] = 0;
|
|
velyOrig[z] = 0;
|
|
velzOrig[z] = 0;
|
|
density[z] = 0;
|
|
if (fuel) {
|
|
fuel[z] = 0;
|
|
flame[z] = 0;
|
|
}
|
|
if (r) {
|
|
r[z] = 0;
|
|
g[z] = 0;
|
|
b[z] = 0;
|
|
}
|
|
}
|
|
/* average velocities from multiple obstacles in one cell */
|
|
if (num_obstacles[z]) {
|
|
velx[z] /= num_obstacles[z];
|
|
vely[z] /= num_obstacles[z];
|
|
velz[z] /= num_obstacles[z];
|
|
}
|
|
}
|
|
|
|
MEM_freeN(num_obstacles);
|
|
}
|
|
|
|
/**********************************************************
|
|
* Flow emission code
|
|
**********************************************************/
|
|
|
|
typedef struct EmissionMap {
|
|
float *influence;
|
|
float *influence_high;
|
|
float *velocity;
|
|
int min[3], max[3], res[3];
|
|
int hmin[3], hmax[3], hres[3];
|
|
int total_cells, valid;
|
|
} EmissionMap;
|
|
|
|
static void em_boundInsert(EmissionMap *em, float point[3])
|
|
{
|
|
int i = 0;
|
|
if (!em->valid) {
|
|
for (; i < 3; i++) {
|
|
em->min[i] = (int)floor(point[i]);
|
|
em->max[i] = (int)ceil(point[i]);
|
|
}
|
|
em->valid = 1;
|
|
}
|
|
else {
|
|
for (; i < 3; i++) {
|
|
if (point[i] < em->min[i]) em->min[i] = (int)floor(point[i]);
|
|
if (point[i] > em->max[i]) em->max[i] = (int)ceil(point[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void clampBoundsInDomain(SmokeDomainSettings *sds, int min[3], int max[3], float *min_vel, float *max_vel, int margin, float dt)
|
|
{
|
|
int i;
|
|
for (i = 0; i < 3; i++) {
|
|
int adapt = (sds->flags & MOD_SMOKE_ADAPTIVE_DOMAIN) ? sds->adapt_res : 0;
|
|
/* add margin */
|
|
min[i] -= margin;
|
|
max[i] += margin;
|
|
|
|
/* adapt to velocity */
|
|
if (min_vel && min_vel[i] < 0.0f) {
|
|
min[i] += (int)floor(min_vel[i] * dt);
|
|
}
|
|
if (max_vel && max_vel[i] > 0.0f) {
|
|
max[i] += (int)ceil(max_vel[i] * dt);
|
|
}
|
|
|
|
/* clamp within domain max size */
|
|
CLAMP(min[i], -adapt, sds->base_res[i] + adapt);
|
|
CLAMP(max[i], -adapt, sds->base_res[i] + adapt);
|
|
}
|
|
}
|
|
|
|
static void em_allocateData(EmissionMap *em, bool use_velocity, int hires_mul)
|
|
{
|
|
int i, res[3];
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
res[i] = em->max[i] - em->min[i];
|
|
if (res[i] <= 0)
|
|
return;
|
|
}
|
|
em->total_cells = res[0] * res[1] * res[2];
|
|
copy_v3_v3_int(em->res, res);
|
|
|
|
|
|
em->influence = MEM_callocN(sizeof(float) * em->total_cells, "smoke_flow_influence");
|
|
if (use_velocity)
|
|
em->velocity = MEM_callocN(sizeof(float) * em->total_cells * 3, "smoke_flow_velocity");
|
|
|
|
/* allocate high resolution map if required */
|
|
if (hires_mul > 1) {
|
|
int total_cells_high = em->total_cells * (hires_mul * hires_mul * hires_mul);
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
em->hmin[i] = em->min[i] * hires_mul;
|
|
em->hmax[i] = em->max[i] * hires_mul;
|
|
em->hres[i] = em->res[i] * hires_mul;
|
|
}
|
|
|
|
em->influence_high = MEM_callocN(sizeof(float) * total_cells_high, "smoke_flow_influence_high");
|
|
}
|
|
em->valid = 1;
|
|
}
|
|
|
|
static void em_freeData(EmissionMap *em)
|
|
{
|
|
if (em->influence)
|
|
MEM_freeN(em->influence);
|
|
if (em->influence_high)
|
|
MEM_freeN(em->influence_high);
|
|
if (em->velocity)
|
|
MEM_freeN(em->velocity);
|
|
}
|
|
|
|
static void em_combineMaps(EmissionMap *output, EmissionMap *em2, int hires_multiplier, int additive, float sample_size)
|
|
{
|
|
int i, x, y, z;
|
|
|
|
/* copyfill input 1 struct and clear output for new allocation */
|
|
EmissionMap em1;
|
|
memcpy(&em1, output, sizeof(EmissionMap));
|
|
memset(output, 0, sizeof(EmissionMap));
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
if (em1.valid) {
|
|
output->min[i] = MIN2(em1.min[i], em2->min[i]);
|
|
output->max[i] = MAX2(em1.max[i], em2->max[i]);
|
|
}
|
|
else {
|
|
output->min[i] = em2->min[i];
|
|
output->max[i] = em2->max[i];
|
|
}
|
|
}
|
|
/* allocate output map */
|
|
em_allocateData(output, (em1.velocity || em2->velocity), hires_multiplier);
|
|
|
|
/* base resolution inputs */
|
|
for (x = output->min[0]; x < output->max[0]; x++)
|
|
for (y = output->min[1]; y < output->max[1]; y++)
|
|
for (z = output->min[2]; z < output->max[2]; z++) {
|
|
int index_out = smoke_get_index(x - output->min[0], output->res[0], y - output->min[1], output->res[1], z - output->min[2]);
|
|
|
|
/* initialize with first input if in range */
|
|
if (x >= em1.min[0] && x < em1.max[0] &&
|
|
y >= em1.min[1] && y < em1.max[1] &&
|
|
z >= em1.min[2] && z < em1.max[2])
|
|
{
|
|
int index_in = smoke_get_index(x - em1.min[0], em1.res[0], y - em1.min[1], em1.res[1], z - em1.min[2]);
|
|
|
|
/* values */
|
|
output->influence[index_out] = em1.influence[index_in];
|
|
if (output->velocity && em1.velocity) {
|
|
copy_v3_v3(&output->velocity[index_out * 3], &em1.velocity[index_in * 3]);
|
|
}
|
|
}
|
|
|
|
/* apply second input if in range */
|
|
if (x >= em2->min[0] && x < em2->max[0] &&
|
|
y >= em2->min[1] && y < em2->max[1] &&
|
|
z >= em2->min[2] && z < em2->max[2])
|
|
{
|
|
int index_in = smoke_get_index(x - em2->min[0], em2->res[0], y - em2->min[1], em2->res[1], z - em2->min[2]);
|
|
|
|
/* values */
|
|
if (additive) {
|
|
output->influence[index_out] += em2->influence[index_in] * sample_size;
|
|
}
|
|
else {
|
|
output->influence[index_out] = MAX2(em2->influence[index_in], output->influence[index_out]);
|
|
}
|
|
if (output->velocity && em2->velocity) {
|
|
/* last sample replaces the velocity */
|
|
output->velocity[index_out * 3] = ADD_IF_LOWER(output->velocity[index_out * 3], em2->velocity[index_in * 3]);
|
|
output->velocity[index_out * 3 + 1] = ADD_IF_LOWER(output->velocity[index_out * 3 + 1], em2->velocity[index_in * 3 + 1]);
|
|
output->velocity[index_out * 3 + 2] = ADD_IF_LOWER(output->velocity[index_out * 3 + 2], em2->velocity[index_in * 3 + 2]);
|
|
}
|
|
}
|
|
} // low res loop
|
|
|
|
|
|
|
|
/* initialize high resolution input if available */
|
|
if (output->influence_high) {
|
|
for (x = output->hmin[0]; x < output->hmax[0]; x++)
|
|
for (y = output->hmin[1]; y < output->hmax[1]; y++)
|
|
for (z = output->hmin[2]; z < output->hmax[2]; z++) {
|
|
int index_out = smoke_get_index(x - output->hmin[0], output->hres[0], y - output->hmin[1], output->hres[1], z - output->hmin[2]);
|
|
|
|
/* initialize with first input if in range */
|
|
if (x >= em1.hmin[0] && x < em1.hmax[0] &&
|
|
y >= em1.hmin[1] && y < em1.hmax[1] &&
|
|
z >= em1.hmin[2] && z < em1.hmax[2])
|
|
{
|
|
int index_in = smoke_get_index(x - em1.hmin[0], em1.hres[0], y - em1.hmin[1], em1.hres[1], z - em1.hmin[2]);
|
|
/* values */
|
|
output->influence_high[index_out] = em1.influence_high[index_in];
|
|
}
|
|
|
|
/* apply second input if in range */
|
|
if (x >= em2->hmin[0] && x < em2->hmax[0] &&
|
|
y >= em2->hmin[1] && y < em2->hmax[1] &&
|
|
z >= em2->hmin[2] && z < em2->hmax[2])
|
|
{
|
|
int index_in = smoke_get_index(x - em2->hmin[0], em2->hres[0], y - em2->hmin[1], em2->hres[1], z - em2->hmin[2]);
|
|
|
|
/* values */
|
|
if (additive) {
|
|
output->influence_high[index_out] += em2->influence_high[index_in] * sample_size;
|
|
}
|
|
else {
|
|
output->influence_high[index_out] = MAX2(em2->influence_high[index_in], output->influence_high[index_out]);
|
|
}
|
|
}
|
|
} // high res loop
|
|
}
|
|
|
|
/* free original data */
|
|
em_freeData(&em1);
|
|
}
|
|
|
|
typedef struct EmitFromParticlesData {
|
|
SmokeFlowSettings *sfs;
|
|
KDTree *tree;
|
|
int hires_multiplier;
|
|
|
|
EmissionMap *em;
|
|
float *particle_vel;
|
|
float hr;
|
|
|
|
int *min, *max, *res;
|
|
|
|
float solid;
|
|
float smooth;
|
|
float hr_smooth;
|
|
} EmitFromParticlesData;
|
|
|
|
static void emit_from_particles_task_cb(
|
|
void *__restrict userdata,
|
|
const int z,
|
|
const ParallelRangeTLS *__restrict UNUSED(tls))
|
|
{
|
|
EmitFromParticlesData *data = userdata;
|
|
SmokeFlowSettings *sfs = data->sfs;
|
|
EmissionMap *em = data->em;
|
|
const int hires_multiplier = data->hires_multiplier;
|
|
|
|
for (int x = data->min[0]; x < data->max[0]; x++) {
|
|
for (int y = data->min[1]; y < data->max[1]; y++) {
|
|
/* take low res samples where possible */
|
|
if (hires_multiplier <= 1 || !(x % hires_multiplier || y % hires_multiplier || z % hires_multiplier)) {
|
|
/* get low res space coordinates */
|
|
const int lx = x / hires_multiplier;
|
|
const int ly = y / hires_multiplier;
|
|
const int lz = z / hires_multiplier;
|
|
|
|
const int index = smoke_get_index(lx - em->min[0], em->res[0], ly - em->min[1], em->res[1], lz - em->min[2]);
|
|
const float ray_start[3] = {((float)lx) + 0.5f, ((float)ly) + 0.5f, ((float)lz) + 0.5f};
|
|
|
|
/* find particle distance from the kdtree */
|
|
KDTreeNearest nearest;
|
|
const float range = data->solid + data->smooth;
|
|
BLI_kdtree_find_nearest(data->tree, ray_start, &nearest);
|
|
|
|
if (nearest.dist < range) {
|
|
em->influence[index] = (nearest.dist < data->solid) ?
|
|
1.0f : (1.0f - (nearest.dist - data->solid) / data->smooth);
|
|
/* Uses particle velocity as initial velocity for smoke */
|
|
if (sfs->flags & MOD_SMOKE_FLOW_INITVELOCITY && (sfs->psys->part->phystype != PART_PHYS_NO)) {
|
|
VECADDFAC(&em->velocity[index * 3], &em->velocity[index * 3],
|
|
&data->particle_vel[nearest.index * 3], sfs->vel_multi);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* take high res samples if required */
|
|
if (hires_multiplier > 1) {
|
|
/* get low res space coordinates */
|
|
const float lx = ((float)x) * data->hr;
|
|
const float ly = ((float)y) * data->hr;
|
|
const float lz = ((float)z) * data->hr;
|
|
|
|
const int index = smoke_get_index(
|
|
x - data->min[0], data->res[0], y - data->min[1], data->res[1], z - data->min[2]);
|
|
const float ray_start[3] = {lx + 0.5f * data->hr, ly + 0.5f * data->hr, lz + 0.5f * data->hr};
|
|
|
|
/* find particle distance from the kdtree */
|
|
KDTreeNearest nearest;
|
|
const float range = data->solid + data->hr_smooth;
|
|
BLI_kdtree_find_nearest(data->tree, ray_start, &nearest);
|
|
|
|
if (nearest.dist < range) {
|
|
em->influence_high[index] = (nearest.dist < data->solid) ?
|
|
1.0f : (1.0f - (nearest.dist - data->solid) / data->smooth);
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
static void emit_from_particles(
|
|
Object *flow_ob, SmokeDomainSettings *sds, SmokeFlowSettings *sfs, EmissionMap *em, Scene *scene, float dt)
|
|
{
|
|
if (sfs && sfs->psys && sfs->psys->part && ELEM(sfs->psys->part->type, PART_EMITTER, PART_FLUID)) // is particle system selected
|
|
{
|
|
ParticleSimulationData sim;
|
|
ParticleSystem *psys = sfs->psys;
|
|
float *particle_pos;
|
|
float *particle_vel;
|
|
int totpart = psys->totpart, totchild;
|
|
int p = 0;
|
|
int valid_particles = 0;
|
|
int bounds_margin = 1;
|
|
|
|
/* radius based flow */
|
|
const float solid = sfs->particle_size * 0.5f;
|
|
const float smooth = 0.5f; /* add 0.5 cells of linear falloff to reduce aliasing */
|
|
int hires_multiplier = 1;
|
|
KDTree *tree = NULL;
|
|
|
|
sim.scene = scene;
|
|
sim.ob = flow_ob;
|
|
sim.psys = psys;
|
|
|
|
/* prepare curvemapping tables */
|
|
if ((psys->part->child_flag & PART_CHILD_USE_CLUMP_CURVE) && psys->part->clumpcurve)
|
|
curvemapping_changed_all(psys->part->clumpcurve);
|
|
if ((psys->part->child_flag & PART_CHILD_USE_ROUGH_CURVE) && psys->part->roughcurve)
|
|
curvemapping_changed_all(psys->part->roughcurve);
|
|
if ((psys->part->child_flag & PART_CHILD_USE_TWIST_CURVE) && psys->part->twistcurve)
|
|
curvemapping_changed_all(psys->part->twistcurve);
|
|
|
|
/* initialize particle cache */
|
|
if (psys->part->type == PART_HAIR) {
|
|
// TODO: PART_HAIR not supported whatsoever
|
|
totchild = 0;
|
|
}
|
|
else {
|
|
totchild = psys->totchild * psys->part->disp / 100;
|
|
}
|
|
|
|
particle_pos = MEM_callocN(sizeof(float) * (totpart + totchild) * 3, "smoke_flow_particles");
|
|
particle_vel = MEM_callocN(sizeof(float) * (totpart + totchild) * 3, "smoke_flow_particles");
|
|
|
|
/* setup particle radius emission if enabled */
|
|
if (sfs->flags & MOD_SMOKE_FLOW_USE_PART_SIZE) {
|
|
tree = BLI_kdtree_new(psys->totpart + psys->totchild);
|
|
|
|
/* check need for high resolution map */
|
|
if ((sds->flags & MOD_SMOKE_HIGHRES) && (sds->highres_sampling == SM_HRES_FULLSAMPLE)) {
|
|
hires_multiplier = sds->amplify + 1;
|
|
}
|
|
|
|
bounds_margin = (int)ceil(solid + smooth);
|
|
}
|
|
|
|
/* calculate local position for each particle */
|
|
for (p = 0; p < totpart + totchild; p++)
|
|
{
|
|
ParticleKey state;
|
|
float *pos;
|
|
if (p < totpart) {
|
|
if (psys->particles[p].flag & (PARS_NO_DISP | PARS_UNEXIST))
|
|
continue;
|
|
}
|
|
else {
|
|
/* handle child particle */
|
|
ChildParticle *cpa = &psys->child[p - totpart];
|
|
if (psys->particles[cpa->parent].flag & (PARS_NO_DISP | PARS_UNEXIST))
|
|
continue;
|
|
}
|
|
|
|
state.time = BKE_scene_frame_get(scene); /* use scene time */
|
|
if (psys_get_particle_state(&sim, p, &state, 0) == 0)
|
|
continue;
|
|
|
|
/* location */
|
|
pos = &particle_pos[valid_particles * 3];
|
|
copy_v3_v3(pos, state.co);
|
|
smoke_pos_to_cell(sds, pos);
|
|
|
|
/* velocity */
|
|
copy_v3_v3(&particle_vel[valid_particles * 3], state.vel);
|
|
mul_mat3_m4_v3(sds->imat, &particle_vel[valid_particles * 3]);
|
|
|
|
if (sfs->flags & MOD_SMOKE_FLOW_USE_PART_SIZE) {
|
|
BLI_kdtree_insert(tree, valid_particles, pos);
|
|
}
|
|
|
|
/* calculate emission map bounds */
|
|
em_boundInsert(em, pos);
|
|
valid_particles++;
|
|
}
|
|
|
|
/* set emission map */
|
|
clampBoundsInDomain(sds, em->min, em->max, NULL, NULL, bounds_margin, dt);
|
|
em_allocateData(em, sfs->flags & MOD_SMOKE_FLOW_INITVELOCITY, hires_multiplier);
|
|
|
|
if (!(sfs->flags & MOD_SMOKE_FLOW_USE_PART_SIZE)) {
|
|
for (p = 0; p < valid_particles; p++)
|
|
{
|
|
int cell[3];
|
|
size_t i = 0;
|
|
size_t index = 0;
|
|
int badcell = 0;
|
|
|
|
/* 1. get corresponding cell */
|
|
cell[0] = floor(particle_pos[p * 3]) - em->min[0];
|
|
cell[1] = floor(particle_pos[p * 3 + 1]) - em->min[1];
|
|
cell[2] = floor(particle_pos[p * 3 + 2]) - em->min[2];
|
|
/* check if cell is valid (in the domain boundary) */
|
|
for (i = 0; i < 3; i++) {
|
|
if ((cell[i] > em->res[i] - 1) || (cell[i] < 0)) {
|
|
badcell = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (badcell)
|
|
continue;
|
|
/* get cell index */
|
|
index = smoke_get_index(cell[0], em->res[0], cell[1], em->res[1], cell[2]);
|
|
/* Add influence to emission map */
|
|
em->influence[index] = 1.0f;
|
|
/* Uses particle velocity as initial velocity for smoke */
|
|
if (sfs->flags & MOD_SMOKE_FLOW_INITVELOCITY && (psys->part->phystype != PART_PHYS_NO))
|
|
{
|
|
VECADDFAC(&em->velocity[index * 3], &em->velocity[index * 3], &particle_vel[p * 3], sfs->vel_multi);
|
|
}
|
|
} // particles loop
|
|
}
|
|
else if (valid_particles > 0) { // MOD_SMOKE_FLOW_USE_PART_SIZE
|
|
int min[3], max[3], res[3];
|
|
const float hr = 1.0f / ((float)hires_multiplier);
|
|
/* slightly adjust high res antialias smoothness based on number of divisions
|
|
* to allow smaller details but yet not differing too much from the low res size */
|
|
const float hr_smooth = smooth * powf(hr, 1.0f / 3.0f);
|
|
|
|
/* setup loop bounds */
|
|
for (int i = 0; i < 3; i++) {
|
|
min[i] = em->min[i] * hires_multiplier;
|
|
max[i] = em->max[i] * hires_multiplier;
|
|
res[i] = em->res[i] * hires_multiplier;
|
|
}
|
|
|
|
BLI_kdtree_balance(tree);
|
|
|
|
EmitFromParticlesData data = {
|
|
.sfs = sfs, .tree = tree, .hires_multiplier = hires_multiplier, .hr = hr,
|
|
.em = em, .particle_vel = particle_vel, .min = min, .max = max, .res = res,
|
|
.solid = solid, .smooth = smooth, .hr_smooth = hr_smooth,
|
|
};
|
|
|
|
ParallelRangeSettings settings;
|
|
BLI_parallel_range_settings_defaults(&settings);
|
|
settings.scheduling_mode = TASK_SCHEDULING_DYNAMIC;
|
|
BLI_task_parallel_range(min[2], max[2],
|
|
&data,
|
|
emit_from_particles_task_cb,
|
|
&settings);
|
|
}
|
|
|
|
if (sfs->flags & MOD_SMOKE_FLOW_USE_PART_SIZE) {
|
|
BLI_kdtree_free(tree);
|
|
}
|
|
|
|
/* free data */
|
|
if (particle_pos)
|
|
MEM_freeN(particle_pos);
|
|
if (particle_vel)
|
|
MEM_freeN(particle_vel);
|
|
}
|
|
}
|
|
|
|
static void sample_derivedmesh(
|
|
SmokeFlowSettings *sfs,
|
|
const MVert *mvert, const MLoop *mloop, const MLoopTri *mlooptri, const MLoopUV *mloopuv,
|
|
float *influence_map, float *velocity_map, int index, const int base_res[3], float flow_center[3],
|
|
BVHTreeFromMesh *treeData, const float ray_start[3], const float *vert_vel,
|
|
bool has_velocity, int defgrp_index, MDeformVert *dvert,
|
|
float x, float y, float z)
|
|
{
|
|
float ray_dir[3] = {1.0f, 0.0f, 0.0f};
|
|
BVHTreeRayHit hit = {0};
|
|
BVHTreeNearest nearest = {0};
|
|
|
|
float volume_factor = 0.0f;
|
|
float sample_str = 0.0f;
|
|
|
|
hit.index = -1;
|
|
hit.dist = 9999;
|
|
nearest.index = -1;
|
|
nearest.dist_sq = sfs->surface_distance * sfs->surface_distance; /* find_nearest uses squared distance */
|
|
|
|
/* Check volume collision */
|
|
if (sfs->volume_density) {
|
|
if (BLI_bvhtree_ray_cast(treeData->tree, ray_start, ray_dir, 0.0f, &hit, treeData->raycast_callback, treeData) != -1) {
|
|
float dot = ray_dir[0] * hit.no[0] + ray_dir[1] * hit.no[1] + ray_dir[2] * hit.no[2];
|
|
/* If ray and hit face normal are facing same direction
|
|
* hit point is inside a closed mesh. */
|
|
if (dot >= 0) {
|
|
/* Also cast a ray in opposite direction to make sure
|
|
* point is at least surrounded by two faces */
|
|
negate_v3(ray_dir);
|
|
hit.index = -1;
|
|
hit.dist = 9999;
|
|
|
|
BLI_bvhtree_ray_cast(treeData->tree, ray_start, ray_dir, 0.0f, &hit, treeData->raycast_callback, treeData);
|
|
if (hit.index != -1) {
|
|
volume_factor = sfs->volume_density;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* find the nearest point on the mesh */
|
|
if (BLI_bvhtree_find_nearest(treeData->tree, ray_start, &nearest, treeData->nearest_callback, treeData) != -1) {
|
|
float weights[3];
|
|
int v1, v2, v3, f_index = nearest.index;
|
|
float n1[3], n2[3], n3[3], hit_normal[3];
|
|
|
|
/* emit from surface based on distance */
|
|
if (sfs->surface_distance) {
|
|
sample_str = sqrtf(nearest.dist_sq) / sfs->surface_distance;
|
|
CLAMP(sample_str, 0.0f, 1.0f);
|
|
sample_str = pow(1.0f - sample_str, 0.5f);
|
|
}
|
|
else
|
|
sample_str = 0.0f;
|
|
|
|
/* calculate barycentric weights for nearest point */
|
|
v1 = mloop[mlooptri[f_index].tri[0]].v;
|
|
v2 = mloop[mlooptri[f_index].tri[1]].v;
|
|
v3 = mloop[mlooptri[f_index].tri[2]].v;
|
|
interp_weights_tri_v3(weights, mvert[v1].co, mvert[v2].co, mvert[v3].co, nearest.co);
|
|
|
|
if (sfs->flags & MOD_SMOKE_FLOW_INITVELOCITY && velocity_map) {
|
|
/* apply normal directional velocity */
|
|
if (sfs->vel_normal) {
|
|
/* interpolate vertex normal vectors to get nearest point normal */
|
|
normal_short_to_float_v3(n1, mvert[v1].no);
|
|
normal_short_to_float_v3(n2, mvert[v2].no);
|
|
normal_short_to_float_v3(n3, mvert[v3].no);
|
|
interp_v3_v3v3v3(hit_normal, n1, n2, n3, weights);
|
|
normalize_v3(hit_normal);
|
|
/* apply normal directional and random velocity
|
|
* - TODO: random disabled for now since it doesnt really work well as pressure calc smoothens it out... */
|
|
velocity_map[index * 3] += hit_normal[0] * sfs->vel_normal * 0.25f;
|
|
velocity_map[index * 3 + 1] += hit_normal[1] * sfs->vel_normal * 0.25f;
|
|
velocity_map[index * 3 + 2] += hit_normal[2] * sfs->vel_normal * 0.25f;
|
|
/* TODO: for fire emitted from mesh surface we can use
|
|
* Vf = Vs + (Ps/Pf - 1)*S to model gaseous expansion from solid to fuel */
|
|
}
|
|
/* apply object velocity */
|
|
if (has_velocity && sfs->vel_multi) {
|
|
float hit_vel[3];
|
|
interp_v3_v3v3v3(hit_vel, &vert_vel[v1 * 3], &vert_vel[v2 * 3], &vert_vel[v3 * 3], weights);
|
|
velocity_map[index * 3] += hit_vel[0] * sfs->vel_multi;
|
|
velocity_map[index * 3 + 1] += hit_vel[1] * sfs->vel_multi;
|
|
velocity_map[index * 3 + 2] += hit_vel[2] * sfs->vel_multi;
|
|
}
|
|
}
|
|
|
|
/* apply vertex group influence if used */
|
|
if (defgrp_index != -1 && dvert) {
|
|
float weight_mask = defvert_find_weight(&dvert[v1], defgrp_index) * weights[0] +
|
|
defvert_find_weight(&dvert[v2], defgrp_index) * weights[1] +
|
|
defvert_find_weight(&dvert[v3], defgrp_index) * weights[2];
|
|
sample_str *= weight_mask;
|
|
}
|
|
|
|
/* apply emission texture */
|
|
if ((sfs->flags & MOD_SMOKE_FLOW_TEXTUREEMIT) && sfs->noise_texture) {
|
|
float tex_co[3] = {0};
|
|
TexResult texres;
|
|
|
|
if (sfs->texture_type == MOD_SMOKE_FLOW_TEXTURE_MAP_AUTO) {
|
|
tex_co[0] = ((x - flow_center[0]) / base_res[0]) / sfs->texture_size;
|
|
tex_co[1] = ((y - flow_center[1]) / base_res[1]) / sfs->texture_size;
|
|
tex_co[2] = ((z - flow_center[2]) / base_res[2] - sfs->texture_offset) / sfs->texture_size;
|
|
}
|
|
else if (mloopuv) {
|
|
const float *uv[3];
|
|
uv[0] = mloopuv[mlooptri[f_index].tri[0]].uv;
|
|
uv[1] = mloopuv[mlooptri[f_index].tri[1]].uv;
|
|
uv[2] = mloopuv[mlooptri[f_index].tri[2]].uv;
|
|
|
|
interp_v2_v2v2v2(tex_co, UNPACK3(uv), weights);
|
|
|
|
/* map between -1.0f and 1.0f */
|
|
tex_co[0] = tex_co[0] * 2.0f - 1.0f;
|
|
tex_co[1] = tex_co[1] * 2.0f - 1.0f;
|
|
tex_co[2] = sfs->texture_offset;
|
|
}
|
|
texres.nor = NULL;
|
|
BKE_texture_get_value(NULL, sfs->noise_texture, tex_co, &texres, false);
|
|
sample_str *= texres.tin;
|
|
}
|
|
}
|
|
|
|
/* multiply initial velocity by emitter influence */
|
|
if (sfs->flags & MOD_SMOKE_FLOW_INITVELOCITY && velocity_map) {
|
|
mul_v3_fl(&velocity_map[index * 3], sample_str);
|
|
}
|
|
|
|
/* apply final influence based on volume factor */
|
|
influence_map[index] = MAX2(volume_factor, sample_str);
|
|
}
|
|
|
|
typedef struct EmitFromDMData {
|
|
SmokeDomainSettings *sds;
|
|
SmokeFlowSettings *sfs;
|
|
const MVert *mvert;
|
|
const MLoop *mloop;
|
|
const MLoopTri *mlooptri;
|
|
const MLoopUV *mloopuv;
|
|
MDeformVert *dvert;
|
|
int defgrp_index;
|
|
|
|
BVHTreeFromMesh *tree;
|
|
int hires_multiplier;
|
|
float hr;
|
|
|
|
EmissionMap *em;
|
|
bool has_velocity;
|
|
float *vert_vel;
|
|
|
|
float *flow_center;
|
|
int *min, *max, *res;
|
|
} EmitFromDMData;
|
|
|
|
static void emit_from_derivedmesh_task_cb(
|
|
void *__restrict userdata,
|
|
const int z,
|
|
const ParallelRangeTLS *__restrict UNUSED(tls))
|
|
{
|
|
EmitFromDMData *data = userdata;
|
|
EmissionMap *em = data->em;
|
|
const int hires_multiplier = data->hires_multiplier;
|
|
|
|
for (int x = data->min[0]; x < data->max[0]; x++) {
|
|
for (int y = data->min[1]; y < data->max[1]; y++) {
|
|
/* take low res samples where possible */
|
|
if (hires_multiplier <= 1 || !(x % hires_multiplier || y % hires_multiplier || z % hires_multiplier)) {
|
|
/* get low res space coordinates */
|
|
const int lx = x / hires_multiplier;
|
|
const int ly = y / hires_multiplier;
|
|
const int lz = z / hires_multiplier;
|
|
|
|
const int index = smoke_get_index(
|
|
lx - em->min[0], em->res[0], ly - em->min[1], em->res[1], lz - em->min[2]);
|
|
const float ray_start[3] = {((float)lx) + 0.5f, ((float)ly) + 0.5f, ((float)lz) + 0.5f};
|
|
|
|
sample_derivedmesh(
|
|
data->sfs, data->mvert, data->mloop, data->mlooptri, data->mloopuv,
|
|
em->influence, em->velocity, index, data->sds->base_res, data->flow_center,
|
|
data->tree, ray_start, data->vert_vel, data->has_velocity, data->defgrp_index, data->dvert,
|
|
(float)lx, (float)ly, (float)lz);
|
|
}
|
|
|
|
/* take high res samples if required */
|
|
if (hires_multiplier > 1) {
|
|
/* get low res space coordinates */
|
|
const float lx = ((float)x) * data->hr;
|
|
const float ly = ((float)y) * data->hr;
|
|
const float lz = ((float)z) * data->hr;
|
|
|
|
const int index = smoke_get_index(
|
|
x - data->min[0], data->res[0], y - data->min[1], data->res[1], z - data->min[2]);
|
|
const float ray_start[3] = {lx + 0.5f * data->hr, ly + 0.5f * data->hr, lz + 0.5f * data->hr};
|
|
|
|
sample_derivedmesh(
|
|
data->sfs, data->mvert, data->mloop, data->mlooptri, data->mloopuv,
|
|
em->influence_high, NULL, index, data->sds->base_res, data->flow_center,
|
|
data->tree, ray_start, data->vert_vel, data->has_velocity, data->defgrp_index, data->dvert,
|
|
/* x,y,z needs to be always lowres */
|
|
lx, ly, lz);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void emit_from_derivedmesh(Object *flow_ob, SmokeDomainSettings *sds, SmokeFlowSettings *sfs, EmissionMap *em, float dt)
|
|
{
|
|
if (sfs->dm) {
|
|
DerivedMesh *dm;
|
|
int defgrp_index = sfs->vgroup_density - 1;
|
|
MDeformVert *dvert = NULL;
|
|
MVert *mvert = NULL;
|
|
MVert *mvert_orig = NULL;
|
|
const MLoopTri *mlooptri = NULL;
|
|
const MLoopUV *mloopuv = NULL;
|
|
const MLoop *mloop = NULL;
|
|
BVHTreeFromMesh treeData = {NULL};
|
|
int numOfVerts, i;
|
|
float flow_center[3] = {0};
|
|
|
|
float *vert_vel = NULL;
|
|
int has_velocity = 0;
|
|
int min[3], max[3], res[3];
|
|
int hires_multiplier = 1;
|
|
|
|
/* copy derivedmesh for thread safety because we modify it,
|
|
* main issue is its VertArray being modified, then replaced and freed
|
|
*/
|
|
dm = CDDM_copy(sfs->dm);
|
|
|
|
CDDM_calc_normals(dm);
|
|
mvert = dm->getVertArray(dm);
|
|
mvert_orig = dm->dupVertArray(dm); /* copy original mvert and restore when done */
|
|
numOfVerts = dm->getNumVerts(dm);
|
|
dvert = dm->getVertDataArray(dm, CD_MDEFORMVERT);
|
|
mloopuv = CustomData_get_layer_named(&dm->loopData, CD_MLOOPUV, sfs->uvlayer_name);
|
|
mloop = dm->getLoopArray(dm);
|
|
mlooptri = dm->getLoopTriArray(dm);
|
|
|
|
if (sfs->flags & MOD_SMOKE_FLOW_INITVELOCITY) {
|
|
vert_vel = MEM_callocN(sizeof(float) * numOfVerts * 3, "smoke_flow_velocity");
|
|
|
|
if (sfs->numverts != numOfVerts || !sfs->verts_old) {
|
|
if (sfs->verts_old) MEM_freeN(sfs->verts_old);
|
|
sfs->verts_old = MEM_callocN(sizeof(float) * numOfVerts * 3, "smoke_flow_verts_old");
|
|
sfs->numverts = numOfVerts;
|
|
}
|
|
else {
|
|
has_velocity = 1;
|
|
}
|
|
}
|
|
|
|
/* Transform dm vertices to
|
|
* domain grid space for fast lookups */
|
|
for (i = 0; i < numOfVerts; i++) {
|
|
float n[3];
|
|
/* vert pos */
|
|
mul_m4_v3(flow_ob->obmat, mvert[i].co);
|
|
smoke_pos_to_cell(sds, mvert[i].co);
|
|
/* vert normal */
|
|
normal_short_to_float_v3(n, mvert[i].no);
|
|
mul_mat3_m4_v3(flow_ob->obmat, n);
|
|
mul_mat3_m4_v3(sds->imat, n);
|
|
normalize_v3(n);
|
|
normal_float_to_short_v3(mvert[i].no, n);
|
|
/* vert velocity */
|
|
if (sfs->flags & MOD_SMOKE_FLOW_INITVELOCITY) {
|
|
float co[3];
|
|
VECADD(co, mvert[i].co, sds->shift);
|
|
if (has_velocity) {
|
|
sub_v3_v3v3(&vert_vel[i * 3], co, &sfs->verts_old[i * 3]);
|
|
mul_v3_fl(&vert_vel[i * 3], sds->dx / dt);
|
|
}
|
|
copy_v3_v3(&sfs->verts_old[i * 3], co);
|
|
}
|
|
|
|
/* calculate emission map bounds */
|
|
em_boundInsert(em, mvert[i].co);
|
|
}
|
|
mul_m4_v3(flow_ob->obmat, flow_center);
|
|
smoke_pos_to_cell(sds, flow_center);
|
|
|
|
/* check need for high resolution map */
|
|
if ((sds->flags & MOD_SMOKE_HIGHRES) && (sds->highres_sampling == SM_HRES_FULLSAMPLE)) {
|
|
hires_multiplier = sds->amplify + 1;
|
|
}
|
|
|
|
/* set emission map */
|
|
clampBoundsInDomain(sds, em->min, em->max, NULL, NULL, (int)ceil(sfs->surface_distance), dt);
|
|
em_allocateData(em, sfs->flags & MOD_SMOKE_FLOW_INITVELOCITY, hires_multiplier);
|
|
|
|
/* setup loop bounds */
|
|
for (i = 0; i < 3; i++) {
|
|
min[i] = em->min[i] * hires_multiplier;
|
|
max[i] = em->max[i] * hires_multiplier;
|
|
res[i] = em->res[i] * hires_multiplier;
|
|
}
|
|
|
|
if (bvhtree_from_mesh_get(&treeData, dm, BVHTREE_FROM_LOOPTRI, 4)) {
|
|
const float hr = 1.0f / ((float)hires_multiplier);
|
|
|
|
EmitFromDMData data = {
|
|
.sds = sds, .sfs = sfs,
|
|
.mvert = mvert, .mloop = mloop, .mlooptri = mlooptri, .mloopuv = mloopuv,
|
|
.dvert = dvert, .defgrp_index = defgrp_index,
|
|
.tree = &treeData, .hires_multiplier = hires_multiplier, .hr = hr,
|
|
.em = em, .has_velocity = has_velocity, .vert_vel = vert_vel,
|
|
.flow_center = flow_center, .min = min, .max = max, .res = res,
|
|
};
|
|
|
|
ParallelRangeSettings settings;
|
|
BLI_parallel_range_settings_defaults(&settings);
|
|
settings.scheduling_mode = TASK_SCHEDULING_DYNAMIC;
|
|
BLI_task_parallel_range(min[2], max[2],
|
|
&data,
|
|
emit_from_derivedmesh_task_cb,
|
|
&settings);
|
|
}
|
|
/* free bvh tree */
|
|
free_bvhtree_from_mesh(&treeData);
|
|
/* restore original mverts */
|
|
CustomData_set_layer(&dm->vertData, CD_MVERT, mvert_orig);
|
|
|
|
if (mvert) {
|
|
MEM_freeN(mvert);
|
|
}
|
|
if (vert_vel) {
|
|
MEM_freeN(vert_vel);
|
|
}
|
|
|
|
dm->needsFree = 1;
|
|
dm->release(dm);
|
|
}
|
|
}
|
|
|
|
/**********************************************************
|
|
* Smoke step
|
|
**********************************************************/
|
|
|
|
static void adjustDomainResolution(SmokeDomainSettings *sds, int new_shift[3], EmissionMap *emaps, unsigned int numflowobj, float dt)
|
|
{
|
|
const int block_size = sds->amplify + 1;
|
|
int min[3] = {32767, 32767, 32767}, max[3] = {-32767, -32767, -32767}, res[3];
|
|
int total_cells = 1, res_changed = 0, shift_changed = 0;
|
|
float min_vel[3], max_vel[3];
|
|
int x, y, z;
|
|
float *density = smoke_get_density(sds->fluid);
|
|
float *fuel = smoke_get_fuel(sds->fluid);
|
|
float *bigdensity = smoke_turbulence_get_density(sds->wt);
|
|
float *bigfuel = smoke_turbulence_get_fuel(sds->wt);
|
|
float *vx = smoke_get_velocity_x(sds->fluid);
|
|
float *vy = smoke_get_velocity_y(sds->fluid);
|
|
float *vz = smoke_get_velocity_z(sds->fluid);
|
|
int wt_res[3];
|
|
|
|
if (sds->flags & MOD_SMOKE_HIGHRES && sds->wt) {
|
|
smoke_turbulence_get_res(sds->wt, wt_res);
|
|
}
|
|
|
|
INIT_MINMAX(min_vel, max_vel);
|
|
|
|
/* Calculate bounds for current domain content */
|
|
for (x = sds->res_min[0]; x < sds->res_max[0]; x++)
|
|
for (y = sds->res_min[1]; y < sds->res_max[1]; y++)
|
|
for (z = sds->res_min[2]; z < sds->res_max[2]; z++)
|
|
{
|
|
int xn = x - new_shift[0];
|
|
int yn = y - new_shift[1];
|
|
int zn = z - new_shift[2];
|
|
int index;
|
|
float max_den;
|
|
|
|
/* skip if cell already belongs to new area */
|
|
if (xn >= min[0] && xn <= max[0] && yn >= min[1] && yn <= max[1] && zn >= min[2] && zn <= max[2])
|
|
continue;
|
|
|
|
index = smoke_get_index(x - sds->res_min[0], sds->res[0], y - sds->res_min[1], sds->res[1], z - sds->res_min[2]);
|
|
max_den = (fuel) ? MAX2(density[index], fuel[index]) : density[index];
|
|
|
|
/* check high resolution bounds if max density isnt already high enough */
|
|
if (max_den < sds->adapt_threshold && sds->flags & MOD_SMOKE_HIGHRES && sds->wt) {
|
|
int i, j, k;
|
|
/* high res grid index */
|
|
int xx = (x - sds->res_min[0]) * block_size;
|
|
int yy = (y - sds->res_min[1]) * block_size;
|
|
int zz = (z - sds->res_min[2]) * block_size;
|
|
|
|
for (i = 0; i < block_size; i++)
|
|
for (j = 0; j < block_size; j++)
|
|
for (k = 0; k < block_size; k++)
|
|
{
|
|
int big_index = smoke_get_index(xx + i, wt_res[0], yy + j, wt_res[1], zz + k);
|
|
float den = (bigfuel) ? MAX2(bigdensity[big_index], bigfuel[big_index]) : bigdensity[big_index];
|
|
if (den > max_den) {
|
|
max_den = den;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* content bounds (use shifted coordinates) */
|
|
if (max_den >= sds->adapt_threshold) {
|
|
if (min[0] > xn) min[0] = xn;
|
|
if (min[1] > yn) min[1] = yn;
|
|
if (min[2] > zn) min[2] = zn;
|
|
if (max[0] < xn) max[0] = xn;
|
|
if (max[1] < yn) max[1] = yn;
|
|
if (max[2] < zn) max[2] = zn;
|
|
}
|
|
|
|
/* velocity bounds */
|
|
if (min_vel[0] > vx[index]) min_vel[0] = vx[index];
|
|
if (min_vel[1] > vy[index]) min_vel[1] = vy[index];
|
|
if (min_vel[2] > vz[index]) min_vel[2] = vz[index];
|
|
if (max_vel[0] < vx[index]) max_vel[0] = vx[index];
|
|
if (max_vel[1] < vy[index]) max_vel[1] = vy[index];
|
|
if (max_vel[2] < vz[index]) max_vel[2] = vz[index];
|
|
}
|
|
|
|
/* also apply emission maps */
|
|
for (int i = 0; i < numflowobj; i++) {
|
|
EmissionMap *em = &emaps[i];
|
|
|
|
for (x = em->min[0]; x < em->max[0]; x++)
|
|
for (y = em->min[1]; y < em->max[1]; y++)
|
|
for (z = em->min[2]; z < em->max[2]; z++)
|
|
{
|
|
int index = smoke_get_index(x - em->min[0], em->res[0], y - em->min[1], em->res[1], z - em->min[2]);
|
|
float max_den = em->influence[index];
|
|
|
|
/* density bounds */
|
|
if (max_den >= sds->adapt_threshold) {
|
|
if (min[0] > x) min[0] = x;
|
|
if (min[1] > y) min[1] = y;
|
|
if (min[2] > z) min[2] = z;
|
|
if (max[0] < x) max[0] = x;
|
|
if (max[1] < y) max[1] = y;
|
|
if (max[2] < z) max[2] = z;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* calculate new bounds based on these values */
|
|
mul_v3_fl(min_vel, 1.0f / sds->dx);
|
|
mul_v3_fl(max_vel, 1.0f / sds->dx);
|
|
clampBoundsInDomain(sds, min, max, min_vel, max_vel, sds->adapt_margin + 1, dt);
|
|
|
|
for (int i = 0; i < 3; i++) {
|
|
/* calculate new resolution */
|
|
res[i] = max[i] - min[i];
|
|
total_cells *= res[i];
|
|
|
|
if (new_shift[i])
|
|
shift_changed = 1;
|
|
|
|
/* if no content set minimum dimensions */
|
|
if (res[i] <= 0) {
|
|
int j;
|
|
for (j = 0; j < 3; j++) {
|
|
min[j] = 0;
|
|
max[j] = 1;
|
|
res[j] = 1;
|
|
}
|
|
res_changed = 1;
|
|
total_cells = 1;
|
|
break;
|
|
}
|
|
if (min[i] != sds->res_min[i] || max[i] != sds->res_max[i])
|
|
res_changed = 1;
|
|
}
|
|
|
|
if (res_changed || shift_changed) {
|
|
struct FLUID_3D *fluid_old = sds->fluid;
|
|
struct WTURBULENCE *turb_old = sds->wt;
|
|
/* allocate new fluid data */
|
|
smoke_reallocate_fluid(sds, sds->dx, res, 0);
|
|
if (sds->flags & MOD_SMOKE_HIGHRES) {
|
|
smoke_reallocate_highres_fluid(sds, sds->dx, res, 0);
|
|
}
|
|
|
|
/* copy values from old fluid to new */
|
|
if (sds->total_cells > 1 && total_cells > 1) {
|
|
/* low res smoke */
|
|
float *o_dens, *o_react, *o_flame, *o_fuel, *o_heat, *o_heatold, *o_vx, *o_vy, *o_vz, *o_r, *o_g, *o_b;
|
|
float *n_dens, *n_react, *n_flame, *n_fuel, *n_heat, *n_heatold, *n_vx, *n_vy, *n_vz, *n_r, *n_g, *n_b;
|
|
float dummy;
|
|
unsigned char *dummy_p;
|
|
/* high res smoke */
|
|
int wt_res_old[3];
|
|
float *o_wt_dens, *o_wt_react, *o_wt_flame, *o_wt_fuel, *o_wt_tcu, *o_wt_tcv, *o_wt_tcw, *o_wt_r, *o_wt_g, *o_wt_b;
|
|
float *n_wt_dens, *n_wt_react, *n_wt_flame, *n_wt_fuel, *n_wt_tcu, *n_wt_tcv, *n_wt_tcw, *n_wt_r, *n_wt_g, *n_wt_b;
|
|
|
|
smoke_export(fluid_old, &dummy, &dummy, &o_dens, &o_react, &o_flame, &o_fuel, &o_heat, &o_heatold, &o_vx, &o_vy, &o_vz, &o_r, &o_g, &o_b, &dummy_p);
|
|
smoke_export(sds->fluid, &dummy, &dummy, &n_dens, &n_react, &n_flame, &n_fuel, &n_heat, &n_heatold, &n_vx, &n_vy, &n_vz, &n_r, &n_g, &n_b, &dummy_p);
|
|
|
|
if (sds->flags & MOD_SMOKE_HIGHRES) {
|
|
smoke_turbulence_export(turb_old, &o_wt_dens, &o_wt_react, &o_wt_flame, &o_wt_fuel, &o_wt_r, &o_wt_g, &o_wt_b, &o_wt_tcu, &o_wt_tcv, &o_wt_tcw);
|
|
smoke_turbulence_get_res(turb_old, wt_res_old);
|
|
smoke_turbulence_export(sds->wt, &n_wt_dens, &n_wt_react, &n_wt_flame, &n_wt_fuel, &n_wt_r, &n_wt_g, &n_wt_b, &n_wt_tcu, &n_wt_tcv, &n_wt_tcw);
|
|
}
|
|
|
|
|
|
for (x = sds->res_min[0]; x < sds->res_max[0]; x++)
|
|
for (y = sds->res_min[1]; y < sds->res_max[1]; y++)
|
|
for (z = sds->res_min[2]; z < sds->res_max[2]; z++)
|
|
{
|
|
/* old grid index */
|
|
int xo = x - sds->res_min[0];
|
|
int yo = y - sds->res_min[1];
|
|
int zo = z - sds->res_min[2];
|
|
int index_old = smoke_get_index(xo, sds->res[0], yo, sds->res[1], zo);
|
|
/* new grid index */
|
|
int xn = x - min[0] - new_shift[0];
|
|
int yn = y - min[1] - new_shift[1];
|
|
int zn = z - min[2] - new_shift[2];
|
|
int index_new = smoke_get_index(xn, res[0], yn, res[1], zn);
|
|
|
|
/* skip if outside new domain */
|
|
if (xn < 0 || xn >= res[0] ||
|
|
yn < 0 || yn >= res[1] ||
|
|
zn < 0 || zn >= res[2])
|
|
continue;
|
|
|
|
/* copy data */
|
|
n_dens[index_new] = o_dens[index_old];
|
|
/* heat */
|
|
if (n_heat && o_heat) {
|
|
n_heat[index_new] = o_heat[index_old];
|
|
n_heatold[index_new] = o_heatold[index_old];
|
|
}
|
|
/* fuel */
|
|
if (n_fuel && o_fuel) {
|
|
n_flame[index_new] = o_flame[index_old];
|
|
n_fuel[index_new] = o_fuel[index_old];
|
|
n_react[index_new] = o_react[index_old];
|
|
}
|
|
/* color */
|
|
if (o_r && n_r) {
|
|
n_r[index_new] = o_r[index_old];
|
|
n_g[index_new] = o_g[index_old];
|
|
n_b[index_new] = o_b[index_old];
|
|
}
|
|
n_vx[index_new] = o_vx[index_old];
|
|
n_vy[index_new] = o_vy[index_old];
|
|
n_vz[index_new] = o_vz[index_old];
|
|
|
|
if (sds->flags & MOD_SMOKE_HIGHRES && turb_old) {
|
|
int i, j, k;
|
|
/* old grid index */
|
|
int xx_o = xo * block_size;
|
|
int yy_o = yo * block_size;
|
|
int zz_o = zo * block_size;
|
|
/* new grid index */
|
|
int xx_n = xn * block_size;
|
|
int yy_n = yn * block_size;
|
|
int zz_n = zn * block_size;
|
|
|
|
n_wt_tcu[index_new] = o_wt_tcu[index_old];
|
|
n_wt_tcv[index_new] = o_wt_tcv[index_old];
|
|
n_wt_tcw[index_new] = o_wt_tcw[index_old];
|
|
|
|
for (i = 0; i < block_size; i++)
|
|
for (j = 0; j < block_size; j++)
|
|
for (k = 0; k < block_size; k++)
|
|
{
|
|
int big_index_old = smoke_get_index(xx_o + i, wt_res_old[0], yy_o + j, wt_res_old[1], zz_o + k);
|
|
int big_index_new = smoke_get_index(xx_n + i, sds->res_wt[0], yy_n + j, sds->res_wt[1], zz_n + k);
|
|
/* copy data */
|
|
n_wt_dens[big_index_new] = o_wt_dens[big_index_old];
|
|
if (n_wt_flame && o_wt_flame) {
|
|
n_wt_flame[big_index_new] = o_wt_flame[big_index_old];
|
|
n_wt_fuel[big_index_new] = o_wt_fuel[big_index_old];
|
|
n_wt_react[big_index_new] = o_wt_react[big_index_old];
|
|
}
|
|
if (n_wt_r && o_wt_r) {
|
|
n_wt_r[big_index_new] = o_wt_r[big_index_old];
|
|
n_wt_g[big_index_new] = o_wt_g[big_index_old];
|
|
n_wt_b[big_index_new] = o_wt_b[big_index_old];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
smoke_free(fluid_old);
|
|
if (turb_old)
|
|
smoke_turbulence_free(turb_old);
|
|
|
|
/* set new domain dimensions */
|
|
VECCOPY(sds->res_min, min);
|
|
VECCOPY(sds->res_max, max);
|
|
VECCOPY(sds->res, res);
|
|
sds->total_cells = total_cells;
|
|
}
|
|
}
|
|
|
|
BLI_INLINE void apply_outflow_fields(int index, float *density, float *heat, float *fuel, float *react, float *color_r, float *color_g, float *color_b)
|
|
{
|
|
density[index] = 0.f;
|
|
if (heat) {
|
|
heat[index] = 0.f;
|
|
}
|
|
if (fuel) {
|
|
fuel[index] = 0.f;
|
|
react[index] = 0.f;
|
|
}
|
|
if (color_r) {
|
|
color_r[index] = 0.f;
|
|
color_g[index] = 0.f;
|
|
color_b[index] = 0.f;
|
|
}
|
|
}
|
|
|
|
BLI_INLINE void apply_inflow_fields(SmokeFlowSettings *sfs, float emission_value, int index, float *density, float *heat, float *fuel, float *react, float *color_r, float *color_g, float *color_b)
|
|
{
|
|
int absolute_flow = (sfs->flags & MOD_SMOKE_FLOW_ABSOLUTE);
|
|
float dens_old = density[index];
|
|
// float fuel_old = (fuel) ? fuel[index] : 0.0f; /* UNUSED */
|
|
float dens_flow = (sfs->type == MOD_SMOKE_FLOW_TYPE_FIRE) ? 0.0f : emission_value * sfs->density;
|
|
float fuel_flow = emission_value * sfs->fuel_amount;
|
|
/* add heat */
|
|
if (heat && emission_value > 0.0f) {
|
|
heat[index] = ADD_IF_LOWER(heat[index], sfs->temp);
|
|
}
|
|
/* absolute */
|
|
if (absolute_flow) {
|
|
if (sfs->type != MOD_SMOKE_FLOW_TYPE_FIRE) {
|
|
if (dens_flow > density[index])
|
|
density[index] = dens_flow;
|
|
}
|
|
if (sfs->type != MOD_SMOKE_FLOW_TYPE_SMOKE && fuel && fuel_flow) {
|
|
if (fuel_flow > fuel[index])
|
|
fuel[index] = fuel_flow;
|
|
}
|
|
}
|
|
/* additive */
|
|
else {
|
|
if (sfs->type != MOD_SMOKE_FLOW_TYPE_FIRE) {
|
|
density[index] += dens_flow;
|
|
CLAMP(density[index], 0.0f, 1.0f);
|
|
}
|
|
if (sfs->type != MOD_SMOKE_FLOW_TYPE_SMOKE && fuel && sfs->fuel_amount) {
|
|
fuel[index] += fuel_flow;
|
|
CLAMP(fuel[index], 0.0f, 10.0f);
|
|
}
|
|
}
|
|
|
|
/* set color */
|
|
if (color_r && dens_flow) {
|
|
float total_dens = density[index] / (dens_old + dens_flow);
|
|
color_r[index] = (color_r[index] + sfs->color[0] * dens_flow) * total_dens;
|
|
color_g[index] = (color_g[index] + sfs->color[1] * dens_flow) * total_dens;
|
|
color_b[index] = (color_b[index] + sfs->color[2] * dens_flow) * total_dens;
|
|
}
|
|
|
|
/* set fire reaction coordinate */
|
|
if (fuel && fuel[index] > FLT_EPSILON) {
|
|
/* instead of using 1.0 for all new fuel add slight falloff
|
|
* to reduce flow blockiness */
|
|
float value = 1.0f - pow2f(1.0f - emission_value);
|
|
|
|
if (value > react[index]) {
|
|
float f = fuel_flow / fuel[index];
|
|
react[index] = value * f + (1.0f - f) * react[index];
|
|
CLAMP(react[index], 0.0f, value);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void update_flowsfluids(
|
|
Main *bmain, EvaluationContext *eval_ctx, Scene *scene, Object *ob, SmokeDomainSettings *sds, float dt)
|
|
{
|
|
Object **flowobjs = NULL;
|
|
EmissionMap *emaps = NULL;
|
|
unsigned int numflowobj = 0;
|
|
unsigned int flowIndex;
|
|
int new_shift[3] = {0};
|
|
int active_fields = sds->active_fields;
|
|
|
|
/* calculate domain shift for current frame if using adaptive domain */
|
|
if (sds->flags & MOD_SMOKE_ADAPTIVE_DOMAIN) {
|
|
int total_shift[3];
|
|
float frame_shift_f[3];
|
|
float ob_loc[3] = {0};
|
|
|
|
mul_m4_v3(ob->obmat, ob_loc);
|
|
|
|
VECSUB(frame_shift_f, ob_loc, sds->prev_loc);
|
|
copy_v3_v3(sds->prev_loc, ob_loc);
|
|
/* convert global space shift to local "cell" space */
|
|
mul_mat3_m4_v3(sds->imat, frame_shift_f);
|
|
frame_shift_f[0] = frame_shift_f[0] / sds->cell_size[0];
|
|
frame_shift_f[1] = frame_shift_f[1] / sds->cell_size[1];
|
|
frame_shift_f[2] = frame_shift_f[2] / sds->cell_size[2];
|
|
/* add to total shift */
|
|
VECADD(sds->shift_f, sds->shift_f, frame_shift_f);
|
|
/* convert to integer */
|
|
total_shift[0] = floor(sds->shift_f[0]);
|
|
total_shift[1] = floor(sds->shift_f[1]);
|
|
total_shift[2] = floor(sds->shift_f[2]);
|
|
VECSUB(new_shift, total_shift, sds->shift);
|
|
copy_v3_v3_int(sds->shift, total_shift);
|
|
|
|
/* calculate new domain boundary points so that smoke doesnt slide on sub-cell movement */
|
|
sds->p0[0] = sds->dp0[0] - sds->cell_size[0] * (sds->shift_f[0] - total_shift[0] - 0.5f);
|
|
sds->p0[1] = sds->dp0[1] - sds->cell_size[1] * (sds->shift_f[1] - total_shift[1] - 0.5f);
|
|
sds->p0[2] = sds->dp0[2] - sds->cell_size[2] * (sds->shift_f[2] - total_shift[2] - 0.5f);
|
|
sds->p1[0] = sds->p0[0] + sds->cell_size[0] * sds->base_res[0];
|
|
sds->p1[1] = sds->p0[1] + sds->cell_size[1] * sds->base_res[1];
|
|
sds->p1[2] = sds->p0[2] + sds->cell_size[2] * sds->base_res[2];
|
|
}
|
|
|
|
flowobjs = get_collisionobjects(scene, ob, sds->fluid_group, &numflowobj, eModifierType_Smoke);
|
|
|
|
/* init emission maps for each flow */
|
|
emaps = MEM_callocN(sizeof(struct EmissionMap) * numflowobj, "smoke_flow_maps");
|
|
|
|
/* Prepare flow emission maps */
|
|
for (flowIndex = 0; flowIndex < numflowobj; flowIndex++)
|
|
{
|
|
Object *collob = flowobjs[flowIndex];
|
|
SmokeModifierData *smd2 = (SmokeModifierData *)modifiers_findByType(collob, eModifierType_Smoke);
|
|
|
|
// check for initialized smoke object
|
|
if ((smd2->type & MOD_SMOKE_TYPE_FLOW) && smd2->flow)
|
|
{
|
|
// we got nice flow object
|
|
SmokeFlowSettings *sfs = smd2->flow;
|
|
int subframes = sfs->subframes;
|
|
EmissionMap *em = &emaps[flowIndex];
|
|
|
|
/* just sample flow directly to emission map if no subframes */
|
|
if (!subframes) {
|
|
if (sfs->source == MOD_SMOKE_FLOW_SOURCE_PARTICLES) {
|
|
emit_from_particles(collob, sds, sfs, em, scene, dt);
|
|
}
|
|
else {
|
|
emit_from_derivedmesh(collob, sds, sfs, em, dt);
|
|
}
|
|
}
|
|
/* sample subframes */
|
|
else {
|
|
int scene_frame = scene->r.cfra;
|
|
// float scene_subframe = scene->r.subframe; // UNUSED
|
|
int subframe;
|
|
for (subframe = 0; subframe <= subframes; subframe++) {
|
|
EmissionMap em_temp = {NULL};
|
|
float sample_size = 1.0f / (float)(subframes+1);
|
|
float prev_frame_pos = sample_size * (float)(subframe+1);
|
|
float sdt = dt * sample_size;
|
|
int hires_multiplier = 1;
|
|
|
|
if ((sds->flags & MOD_SMOKE_HIGHRES) && (sds->highres_sampling == SM_HRES_FULLSAMPLE)) {
|
|
hires_multiplier = sds->amplify + 1;
|
|
}
|
|
|
|
/* set scene frame to match previous frame + subframe
|
|
* or use current frame for last sample */
|
|
if (subframe < subframes) {
|
|
scene->r.cfra = scene_frame - 1;
|
|
scene->r.subframe = prev_frame_pos;
|
|
}
|
|
else {
|
|
scene->r.cfra = scene_frame;
|
|
scene->r.subframe = 0.0f;
|
|
}
|
|
|
|
if (sfs->source == MOD_SMOKE_FLOW_SOURCE_PARTICLES) {
|
|
/* emit_from_particles() updates timestep internally */
|
|
emit_from_particles(collob, sds, sfs, &em_temp, scene, sdt);
|
|
if (!(sfs->flags & MOD_SMOKE_FLOW_USE_PART_SIZE)) {
|
|
hires_multiplier = 1;
|
|
}
|
|
}
|
|
else { /* MOD_SMOKE_FLOW_SOURCE_MESH */
|
|
/* update flow object frame */
|
|
BLI_mutex_lock(&object_update_lock);
|
|
BKE_object_modifier_update_subframe(
|
|
bmain, eval_ctx, scene, collob,
|
|
true, 5, BKE_scene_frame_get(scene), eModifierType_Smoke);
|
|
BLI_mutex_unlock(&object_update_lock);
|
|
|
|
/* apply flow */
|
|
emit_from_derivedmesh(collob, sds, sfs, &em_temp, sdt);
|
|
}
|
|
|
|
/* combine emission maps */
|
|
em_combineMaps(em, &em_temp, hires_multiplier, !(sfs->flags & MOD_SMOKE_FLOW_ABSOLUTE), sample_size);
|
|
em_freeData(&em_temp);
|
|
}
|
|
}
|
|
|
|
/* update required data fields */
|
|
if (em->total_cells && sfs->type != MOD_SMOKE_FLOW_TYPE_OUTFLOW) {
|
|
/* activate heat field if flow produces any heat */
|
|
if (sfs->temp) {
|
|
active_fields |= SM_ACTIVE_HEAT;
|
|
}
|
|
/* activate fuel field if flow adds any fuel */
|
|
if (sfs->type != MOD_SMOKE_FLOW_TYPE_SMOKE && sfs->fuel_amount) {
|
|
active_fields |= SM_ACTIVE_FIRE;
|
|
}
|
|
/* activate color field if flows add smoke with varying colors */
|
|
if (sfs->type != MOD_SMOKE_FLOW_TYPE_FIRE && sfs->density) {
|
|
if (!(active_fields & SM_ACTIVE_COLOR_SET)) {
|
|
copy_v3_v3(sds->active_color, sfs->color);
|
|
active_fields |= SM_ACTIVE_COLOR_SET;
|
|
}
|
|
else if (!equals_v3v3(sds->active_color, sfs->color)) {
|
|
copy_v3_v3(sds->active_color, sfs->color);
|
|
active_fields |= SM_ACTIVE_COLORS;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* monitor active fields based on domain settings */
|
|
/* if domain has fire, activate new fields if required */
|
|
if (active_fields & SM_ACTIVE_FIRE) {
|
|
/* heat is always needed for fire */
|
|
active_fields |= SM_ACTIVE_HEAT;
|
|
/* also activate colors if domain smoke color differs from active color */
|
|
if (!(active_fields & SM_ACTIVE_COLOR_SET)) {
|
|
copy_v3_v3(sds->active_color, sds->flame_smoke_color);
|
|
active_fields |= SM_ACTIVE_COLOR_SET;
|
|
}
|
|
else if (!equals_v3v3(sds->active_color, sds->flame_smoke_color)) {
|
|
copy_v3_v3(sds->active_color, sds->flame_smoke_color);
|
|
active_fields |= SM_ACTIVE_COLORS;
|
|
}
|
|
}
|
|
|
|
/* Adjust domain size if needed */
|
|
if (sds->flags & MOD_SMOKE_ADAPTIVE_DOMAIN) {
|
|
adjustDomainResolution(sds, new_shift, emaps, numflowobj, dt);
|
|
}
|
|
|
|
/* Initialize new data fields if any */
|
|
if (active_fields & SM_ACTIVE_HEAT) {
|
|
smoke_ensure_heat(sds->fluid);
|
|
}
|
|
if (active_fields & SM_ACTIVE_FIRE) {
|
|
smoke_ensure_fire(sds->fluid, sds->wt);
|
|
}
|
|
if (active_fields & SM_ACTIVE_COLORS) {
|
|
/* initialize all smoke with "active_color" */
|
|
smoke_ensure_colors(sds->fluid, sds->wt, sds->active_color[0], sds->active_color[1], sds->active_color[2]);
|
|
}
|
|
sds->active_fields = active_fields;
|
|
|
|
/* Apply emission data */
|
|
if (sds->fluid) {
|
|
for (flowIndex = 0; flowIndex < numflowobj; flowIndex++)
|
|
{
|
|
Object *collob = flowobjs[flowIndex];
|
|
SmokeModifierData *smd2 = (SmokeModifierData *)modifiers_findByType(collob, eModifierType_Smoke);
|
|
|
|
// check for initialized smoke object
|
|
if ((smd2->type & MOD_SMOKE_TYPE_FLOW) && smd2->flow)
|
|
{
|
|
// we got nice flow object
|
|
SmokeFlowSettings *sfs = smd2->flow;
|
|
EmissionMap *em = &emaps[flowIndex];
|
|
|
|
float *density = smoke_get_density(sds->fluid);
|
|
float *color_r = smoke_get_color_r(sds->fluid);
|
|
float *color_g = smoke_get_color_g(sds->fluid);
|
|
float *color_b = smoke_get_color_b(sds->fluid);
|
|
float *fuel = smoke_get_fuel(sds->fluid);
|
|
float *react = smoke_get_react(sds->fluid);
|
|
float *bigdensity = smoke_turbulence_get_density(sds->wt);
|
|
float *bigfuel = smoke_turbulence_get_fuel(sds->wt);
|
|
float *bigreact = smoke_turbulence_get_react(sds->wt);
|
|
float *bigcolor_r = smoke_turbulence_get_color_r(sds->wt);
|
|
float *bigcolor_g = smoke_turbulence_get_color_g(sds->wt);
|
|
float *bigcolor_b = smoke_turbulence_get_color_b(sds->wt);
|
|
float *heat = smoke_get_heat(sds->fluid);
|
|
float *velocity_x = smoke_get_velocity_x(sds->fluid);
|
|
float *velocity_y = smoke_get_velocity_y(sds->fluid);
|
|
float *velocity_z = smoke_get_velocity_z(sds->fluid);
|
|
//unsigned char *obstacle = smoke_get_obstacle(sds->fluid);
|
|
// DG TODO UNUSED unsigned char *obstacleAnim = smoke_get_obstacle_anim(sds->fluid);
|
|
int bigres[3];
|
|
float *velocity_map = em->velocity;
|
|
float *emission_map = em->influence;
|
|
float *emission_map_high = em->influence_high;
|
|
|
|
int ii, jj, kk, gx, gy, gz, ex, ey, ez, dx, dy, dz, block_size;
|
|
size_t e_index, d_index, index_big;
|
|
|
|
// loop through every emission map cell
|
|
for (gx = em->min[0]; gx < em->max[0]; gx++)
|
|
for (gy = em->min[1]; gy < em->max[1]; gy++)
|
|
for (gz = em->min[2]; gz < em->max[2]; gz++)
|
|
{
|
|
/* get emission map index */
|
|
ex = gx - em->min[0];
|
|
ey = gy - em->min[1];
|
|
ez = gz - em->min[2];
|
|
e_index = smoke_get_index(ex, em->res[0], ey, em->res[1], ez);
|
|
|
|
/* get domain index */
|
|
dx = gx - sds->res_min[0];
|
|
dy = gy - sds->res_min[1];
|
|
dz = gz - sds->res_min[2];
|
|
d_index = smoke_get_index(dx, sds->res[0], dy, sds->res[1], dz);
|
|
/* make sure emission cell is inside the new domain boundary */
|
|
if (dx < 0 || dy < 0 || dz < 0 || dx >= sds->res[0] || dy >= sds->res[1] || dz >= sds->res[2]) continue;
|
|
|
|
if (sfs->type == MOD_SMOKE_FLOW_TYPE_OUTFLOW) { // outflow
|
|
apply_outflow_fields(d_index, density, heat, fuel, react, color_r, color_g, color_b);
|
|
}
|
|
else { // inflow
|
|
apply_inflow_fields(sfs, emission_map[e_index], d_index, density, heat, fuel, react, color_r, color_g, color_b);
|
|
|
|
/* initial velocity */
|
|
if (sfs->flags & MOD_SMOKE_FLOW_INITVELOCITY) {
|
|
velocity_x[d_index] = ADD_IF_LOWER(velocity_x[d_index], velocity_map[e_index * 3]);
|
|
velocity_y[d_index] = ADD_IF_LOWER(velocity_y[d_index], velocity_map[e_index * 3 + 1]);
|
|
velocity_z[d_index] = ADD_IF_LOWER(velocity_z[d_index], velocity_map[e_index * 3 + 2]);
|
|
}
|
|
}
|
|
|
|
/* loop through high res blocks if high res enabled */
|
|
if (bigdensity) {
|
|
// neighbor cell emission densities (for high resolution smoke smooth interpolation)
|
|
float c000, c001, c010, c011, c100, c101, c110, c111;
|
|
|
|
smoke_turbulence_get_res(sds->wt, bigres);
|
|
block_size = sds->amplify + 1; // high res block size
|
|
|
|
c000 = (ex > 0 && ey > 0 && ez > 0) ? emission_map[smoke_get_index(ex - 1, em->res[0], ey - 1, em->res[1], ez - 1)] : 0;
|
|
c001 = (ex > 0 && ey > 0) ? emission_map[smoke_get_index(ex - 1, em->res[0], ey - 1, em->res[1], ez)] : 0;
|
|
c010 = (ex > 0 && ez > 0) ? emission_map[smoke_get_index(ex - 1, em->res[0], ey, em->res[1], ez - 1)] : 0;
|
|
c011 = (ex > 0) ? emission_map[smoke_get_index(ex - 1, em->res[0], ey, em->res[1], ez)] : 0;
|
|
|
|
c100 = (ey > 0 && ez > 0) ? emission_map[smoke_get_index(ex, em->res[0], ey - 1, em->res[1], ez - 1)] : 0;
|
|
c101 = (ey > 0) ? emission_map[smoke_get_index(ex, em->res[0], ey - 1, em->res[1], ez)] : 0;
|
|
c110 = (ez > 0) ? emission_map[smoke_get_index(ex, em->res[0], ey, em->res[1], ez - 1)] : 0;
|
|
c111 = emission_map[smoke_get_index(ex, em->res[0], ey, em->res[1], ez)]; // this cell
|
|
|
|
for (ii = 0; ii < block_size; ii++)
|
|
for (jj = 0; jj < block_size; jj++)
|
|
for (kk = 0; kk < block_size; kk++)
|
|
{
|
|
|
|
float fx, fy, fz, interpolated_value;
|
|
int shift_x = 0, shift_y = 0, shift_z = 0;
|
|
|
|
|
|
/* Use full sample emission map if enabled and available */
|
|
if ((sds->highres_sampling == SM_HRES_FULLSAMPLE) && emission_map_high) {
|
|
interpolated_value = emission_map_high[smoke_get_index(ex * block_size + ii, em->res[0] * block_size, ey * block_size + jj, em->res[1] * block_size, ez * block_size + kk)]; // this cell
|
|
}
|
|
else if (sds->highres_sampling == SM_HRES_NEAREST) {
|
|
/* without interpolation use same low resolution
|
|
* block value for all hi-res blocks */
|
|
interpolated_value = c111;
|
|
}
|
|
/* Fall back to interpolated */
|
|
else
|
|
{
|
|
/* get relative block position
|
|
* for interpolation smoothing */
|
|
fx = (float)ii / block_size + 0.5f / block_size;
|
|
fy = (float)jj / block_size + 0.5f / block_size;
|
|
fz = (float)kk / block_size + 0.5f / block_size;
|
|
|
|
/* calculate trilinear interpolation */
|
|
interpolated_value = c000 * (1 - fx) * (1 - fy) * (1 - fz) +
|
|
c100 * fx * (1 - fy) * (1 - fz) +
|
|
c010 * (1 - fx) * fy * (1 - fz) +
|
|
c001 * (1 - fx) * (1 - fy) * fz +
|
|
c101 * fx * (1 - fy) * fz +
|
|
c011 * (1 - fx) * fy * fz +
|
|
c110 * fx * fy * (1 - fz) +
|
|
c111 * fx * fy * fz;
|
|
|
|
|
|
/* add some contrast / sharpness
|
|
* depending on hi-res block size */
|
|
interpolated_value = (interpolated_value - 0.4f) * (block_size / 2) + 0.4f;
|
|
CLAMP(interpolated_value, 0.0f, 1.0f);
|
|
|
|
/* shift smoke block index
|
|
* (because pixel center is actually
|
|
* in halfway of the low res block) */
|
|
shift_x = (dx < 1) ? 0 : block_size / 2;
|
|
shift_y = (dy < 1) ? 0 : block_size / 2;
|
|
shift_z = (dz < 1) ? 0 : block_size / 2;
|
|
}
|
|
|
|
/* get shifted index for current high resolution block */
|
|
index_big = smoke_get_index(block_size * dx + ii - shift_x, bigres[0], block_size * dy + jj - shift_y, bigres[1], block_size * dz + kk - shift_z);
|
|
|
|
if (sfs->type == MOD_SMOKE_FLOW_TYPE_OUTFLOW) { // outflow
|
|
if (interpolated_value) {
|
|
apply_outflow_fields(index_big, bigdensity, NULL, bigfuel, bigreact, bigcolor_r, bigcolor_g, bigcolor_b);
|
|
}
|
|
}
|
|
else { // inflow
|
|
apply_inflow_fields(sfs, interpolated_value, index_big, bigdensity, NULL, bigfuel, bigreact, bigcolor_r, bigcolor_g, bigcolor_b);
|
|
}
|
|
} // hires loop
|
|
} // bigdensity
|
|
} // low res loop
|
|
|
|
// free emission maps
|
|
em_freeData(em);
|
|
|
|
} // end emission
|
|
}
|
|
}
|
|
|
|
if (flowobjs)
|
|
MEM_freeN(flowobjs);
|
|
if (emaps)
|
|
MEM_freeN(emaps);
|
|
}
|
|
|
|
typedef struct UpdateEffectorsData {
|
|
Scene *scene;
|
|
SmokeDomainSettings *sds;
|
|
ListBase *effectors;
|
|
|
|
float *density;
|
|
float *fuel;
|
|
float *force_x;
|
|
float *force_y;
|
|
float *force_z;
|
|
float *velocity_x;
|
|
float *velocity_y;
|
|
float *velocity_z;
|
|
unsigned char *obstacle;
|
|
} UpdateEffectorsData;
|
|
|
|
static void update_effectors_task_cb(
|
|
void *__restrict userdata,
|
|
const int x,
|
|
const ParallelRangeTLS *__restrict UNUSED(tls))
|
|
{
|
|
UpdateEffectorsData *data = userdata;
|
|
SmokeDomainSettings *sds = data->sds;
|
|
|
|
for (int y = 0; y < sds->res[1]; y++) {
|
|
for (int z = 0; z < sds->res[2]; z++)
|
|
{
|
|
EffectedPoint epoint;
|
|
float mag;
|
|
float voxelCenter[3] = {0, 0, 0}, vel[3] = {0, 0, 0}, retvel[3] = {0, 0, 0};
|
|
const unsigned int index = smoke_get_index(x, sds->res[0], y, sds->res[1], z);
|
|
|
|
if (((data->fuel ? MAX2(data->density[index], data->fuel[index]) : data->density[index]) < FLT_EPSILON) ||
|
|
data->obstacle[index])
|
|
{
|
|
continue;
|
|
}
|
|
|
|
vel[0] = data->velocity_x[index];
|
|
vel[1] = data->velocity_y[index];
|
|
vel[2] = data->velocity_z[index];
|
|
|
|
/* convert vel to global space */
|
|
mag = len_v3(vel);
|
|
mul_mat3_m4_v3(sds->obmat, vel);
|
|
normalize_v3(vel);
|
|
mul_v3_fl(vel, mag);
|
|
|
|
voxelCenter[0] = sds->p0[0] + sds->cell_size[0] * ((float)(x + sds->res_min[0]) + 0.5f);
|
|
voxelCenter[1] = sds->p0[1] + sds->cell_size[1] * ((float)(y + sds->res_min[1]) + 0.5f);
|
|
voxelCenter[2] = sds->p0[2] + sds->cell_size[2] * ((float)(z + sds->res_min[2]) + 0.5f);
|
|
mul_m4_v3(sds->obmat, voxelCenter);
|
|
|
|
pd_point_from_loc(data->scene, voxelCenter, vel, index, &epoint);
|
|
pdDoEffectors(data->effectors, NULL, sds->effector_weights, &epoint, retvel, NULL);
|
|
|
|
/* convert retvel to local space */
|
|
mag = len_v3(retvel);
|
|
mul_mat3_m4_v3(sds->imat, retvel);
|
|
normalize_v3(retvel);
|
|
mul_v3_fl(retvel, mag);
|
|
|
|
// TODO dg - do in force!
|
|
data->force_x[index] = min_ff(max_ff(-1.0f, retvel[0] * 0.2f), 1.0f);
|
|
data->force_y[index] = min_ff(max_ff(-1.0f, retvel[1] * 0.2f), 1.0f);
|
|
data->force_z[index] = min_ff(max_ff(-1.0f, retvel[2] * 0.2f), 1.0f);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void update_effectors(Scene *scene, Object *ob, SmokeDomainSettings *sds, float UNUSED(dt))
|
|
{
|
|
ListBase *effectors;
|
|
/* make sure smoke flow influence is 0.0f */
|
|
sds->effector_weights->weight[PFIELD_SMOKEFLOW] = 0.0f;
|
|
effectors = pdInitEffectors(scene, ob, NULL, sds->effector_weights, true);
|
|
|
|
if (effectors) {
|
|
// precalculate wind forces
|
|
UpdateEffectorsData data;
|
|
data.scene = scene;
|
|
data.sds = sds;
|
|
data.effectors = effectors;
|
|
data.density = smoke_get_density(sds->fluid);
|
|
data.fuel = smoke_get_fuel(sds->fluid);
|
|
data.force_x = smoke_get_force_x(sds->fluid);
|
|
data.force_y = smoke_get_force_y(sds->fluid);
|
|
data.force_z = smoke_get_force_z(sds->fluid);
|
|
data.velocity_x = smoke_get_velocity_x(sds->fluid);
|
|
data.velocity_y = smoke_get_velocity_y(sds->fluid);
|
|
data.velocity_z = smoke_get_velocity_z(sds->fluid);
|
|
data.obstacle = smoke_get_obstacle(sds->fluid);
|
|
|
|
ParallelRangeSettings settings;
|
|
BLI_parallel_range_settings_defaults(&settings);
|
|
settings.scheduling_mode = TASK_SCHEDULING_DYNAMIC;
|
|
BLI_task_parallel_range(0, sds->res[0],
|
|
&data,
|
|
update_effectors_task_cb,
|
|
&settings);
|
|
}
|
|
|
|
pdEndEffectors(&effectors);
|
|
}
|
|
|
|
static void step(
|
|
Main *bmain, EvaluationContext *eval_ctx,
|
|
Scene *scene, Object *ob, SmokeModifierData *smd, DerivedMesh *domain_dm, float fps)
|
|
{
|
|
SmokeDomainSettings *sds = smd->domain;
|
|
/* stability values copied from wturbulence.cpp */
|
|
const int maxSubSteps = 25;
|
|
float maxVel;
|
|
// maxVel should be 1.5 (1.5 cell max movement) * dx (cell size)
|
|
|
|
float dt;
|
|
float maxVelMag = 0.0f;
|
|
int totalSubsteps;
|
|
int substep = 0;
|
|
float dtSubdiv;
|
|
float gravity[3] = {0.0f, 0.0f, -1.0f};
|
|
float gravity_mag;
|
|
|
|
#if 0 /* UNUSED */
|
|
/* get max velocity and lower the dt value if it is too high */
|
|
size_t size = sds->res[0] * sds->res[1] * sds->res[2];
|
|
float *velX = smoke_get_velocity_x(sds->fluid);
|
|
float *velY = smoke_get_velocity_y(sds->fluid);
|
|
float *velZ = smoke_get_velocity_z(sds->fluid);
|
|
size_t i;
|
|
#endif
|
|
|
|
/* update object state */
|
|
invert_m4_m4(sds->imat, ob->obmat);
|
|
copy_m4_m4(sds->obmat, ob->obmat);
|
|
smoke_set_domain_from_derivedmesh(sds, ob, domain_dm, (sds->flags & MOD_SMOKE_ADAPTIVE_DOMAIN) != 0);
|
|
|
|
/* use global gravity if enabled */
|
|
if (scene->physics_settings.flag & PHYS_GLOBAL_GRAVITY) {
|
|
copy_v3_v3(gravity, scene->physics_settings.gravity);
|
|
/* map default value to 1.0 */
|
|
mul_v3_fl(gravity, 1.0f / 9.810f);
|
|
}
|
|
/* convert gravity to domain space */
|
|
gravity_mag = len_v3(gravity);
|
|
mul_mat3_m4_v3(sds->imat, gravity);
|
|
normalize_v3(gravity);
|
|
mul_v3_fl(gravity, gravity_mag);
|
|
|
|
/* adapt timestep for different framerates, dt = 0.1 is at 25fps */
|
|
dt = DT_DEFAULT * (25.0f / fps);
|
|
// maximum timestep/"CFL" constraint: dt < 5.0 *dx / maxVel
|
|
maxVel = (sds->dx * 5.0f);
|
|
|
|
#if 0
|
|
for (i = 0; i < size; i++) {
|
|
float vtemp = (velX[i] * velX[i] + velY[i] * velY[i] + velZ[i] * velZ[i]);
|
|
if (vtemp > maxVelMag)
|
|
maxVelMag = vtemp;
|
|
}
|
|
#endif
|
|
|
|
maxVelMag = sqrtf(maxVelMag) * dt * sds->time_scale;
|
|
totalSubsteps = (int)((maxVelMag / maxVel) + 1.0f); /* always round up */
|
|
totalSubsteps = (totalSubsteps < 1) ? 1 : totalSubsteps;
|
|
totalSubsteps = (totalSubsteps > maxSubSteps) ? maxSubSteps : totalSubsteps;
|
|
|
|
/* Disable substeps for now, since it results in numerical instability */
|
|
totalSubsteps = 1.0f;
|
|
|
|
dtSubdiv = (float)dt / (float)totalSubsteps;
|
|
|
|
// printf("totalSubsteps: %d, maxVelMag: %f, dt: %f\n", totalSubsteps, maxVelMag, dt);
|
|
|
|
for (substep = 0; substep < totalSubsteps; substep++)
|
|
{
|
|
// calc animated obstacle velocities
|
|
update_flowsfluids(bmain, eval_ctx, scene, ob, sds, dtSubdiv);
|
|
update_obstacles(scene, ob, sds, dtSubdiv, substep, totalSubsteps);
|
|
|
|
if (sds->total_cells > 1) {
|
|
update_effectors(scene, ob, sds, dtSubdiv); // DG TODO? problem --> uses forces instead of velocity, need to check how they need to be changed with variable dt
|
|
smoke_step(sds->fluid, gravity, dtSubdiv);
|
|
}
|
|
}
|
|
}
|
|
|
|
static DerivedMesh *createDomainGeometry(SmokeDomainSettings *sds, Object *ob)
|
|
{
|
|
DerivedMesh *result;
|
|
MVert *mverts;
|
|
MPoly *mpolys;
|
|
MLoop *mloops;
|
|
float min[3];
|
|
float max[3];
|
|
float *co;
|
|
MPoly *mp;
|
|
MLoop *ml;
|
|
|
|
int num_verts = 8;
|
|
int num_faces = 6;
|
|
int i;
|
|
float ob_loc[3] = {0};
|
|
float ob_cache_loc[3] = {0};
|
|
|
|
/* dont generate any mesh if there isnt any content */
|
|
if (sds->total_cells <= 1) {
|
|
num_verts = 0;
|
|
num_faces = 0;
|
|
}
|
|
|
|
result = CDDM_new(num_verts, 0, 0, num_faces * 4, num_faces);
|
|
mverts = CDDM_get_verts(result);
|
|
mpolys = CDDM_get_polys(result);
|
|
mloops = CDDM_get_loops(result);
|
|
|
|
|
|
if (num_verts) {
|
|
/* volume bounds */
|
|
VECMADD(min, sds->p0, sds->cell_size, sds->res_min);
|
|
VECMADD(max, sds->p0, sds->cell_size, sds->res_max);
|
|
|
|
/* set vertices */
|
|
/* top slab */
|
|
co = mverts[0].co; co[0] = min[0]; co[1] = min[1]; co[2] = max[2];
|
|
co = mverts[1].co; co[0] = max[0]; co[1] = min[1]; co[2] = max[2];
|
|
co = mverts[2].co; co[0] = max[0]; co[1] = max[1]; co[2] = max[2];
|
|
co = mverts[3].co; co[0] = min[0]; co[1] = max[1]; co[2] = max[2];
|
|
/* bottom slab */
|
|
co = mverts[4].co; co[0] = min[0]; co[1] = min[1]; co[2] = min[2];
|
|
co = mverts[5].co; co[0] = max[0]; co[1] = min[1]; co[2] = min[2];
|
|
co = mverts[6].co; co[0] = max[0]; co[1] = max[1]; co[2] = min[2];
|
|
co = mverts[7].co; co[0] = min[0]; co[1] = max[1]; co[2] = min[2];
|
|
|
|
/* create faces */
|
|
/* top */
|
|
mp = &mpolys[0]; ml = &mloops[0 * 4]; mp->loopstart = 0 * 4; mp->totloop = 4;
|
|
ml[0].v = 0; ml[1].v = 1; ml[2].v = 2; ml[3].v = 3;
|
|
/* right */
|
|
mp = &mpolys[1]; ml = &mloops[1 * 4]; mp->loopstart = 1 * 4; mp->totloop = 4;
|
|
ml[0].v = 2; ml[1].v = 1; ml[2].v = 5; ml[3].v = 6;
|
|
/* bottom */
|
|
mp = &mpolys[2]; ml = &mloops[2 * 4]; mp->loopstart = 2 * 4; mp->totloop = 4;
|
|
ml[0].v = 7; ml[1].v = 6; ml[2].v = 5; ml[3].v = 4;
|
|
/* left */
|
|
mp = &mpolys[3]; ml = &mloops[3 * 4]; mp->loopstart = 3 * 4; mp->totloop = 4;
|
|
ml[0].v = 0; ml[1].v = 3; ml[2].v = 7; ml[3].v = 4;
|
|
/* front */
|
|
mp = &mpolys[4]; ml = &mloops[4 * 4]; mp->loopstart = 4 * 4; mp->totloop = 4;
|
|
ml[0].v = 3; ml[1].v = 2; ml[2].v = 6; ml[3].v = 7;
|
|
/* back */
|
|
mp = &mpolys[5]; ml = &mloops[5 * 4]; mp->loopstart = 5 * 4; mp->totloop = 4;
|
|
ml[0].v = 1; ml[1].v = 0; ml[2].v = 4; ml[3].v = 5;
|
|
|
|
/* calculate required shift to match domain's global position
|
|
* it was originally simulated at (if object moves without smoke step) */
|
|
invert_m4_m4(ob->imat, ob->obmat);
|
|
mul_m4_v3(ob->obmat, ob_loc);
|
|
mul_m4_v3(sds->obmat, ob_cache_loc);
|
|
VECSUB(sds->obj_shift_f, ob_cache_loc, ob_loc);
|
|
/* convert shift to local space and apply to vertices */
|
|
mul_mat3_m4_v3(ob->imat, sds->obj_shift_f);
|
|
/* apply */
|
|
for (i = 0; i < num_verts; i++) {
|
|
add_v3_v3(mverts[i].co, sds->obj_shift_f);
|
|
}
|
|
}
|
|
|
|
|
|
CDDM_calc_edges(result);
|
|
result->dirty |= DM_DIRTY_NORMALS;
|
|
return result;
|
|
}
|
|
|
|
static void smokeModifier_process(
|
|
Main *bmain, EvaluationContext *eval_ctx, SmokeModifierData *smd, Scene *scene, Object *ob, DerivedMesh *dm)
|
|
{
|
|
if ((smd->type & MOD_SMOKE_TYPE_FLOW))
|
|
{
|
|
if (scene->r.cfra >= smd->time)
|
|
smokeModifier_init(smd, ob, scene, dm);
|
|
|
|
if (smd->flow->dm) smd->flow->dm->release(smd->flow->dm);
|
|
smd->flow->dm = CDDM_copy(dm);
|
|
|
|
if (scene->r.cfra > smd->time)
|
|
{
|
|
smd->time = scene->r.cfra;
|
|
}
|
|
else if (scene->r.cfra < smd->time)
|
|
{
|
|
smd->time = scene->r.cfra;
|
|
smokeModifier_reset_ex(smd, false);
|
|
}
|
|
}
|
|
else if (smd->type & MOD_SMOKE_TYPE_COLL)
|
|
{
|
|
if (scene->r.cfra >= smd->time)
|
|
smokeModifier_init(smd, ob, scene, dm);
|
|
|
|
if (smd->coll)
|
|
{
|
|
if (smd->coll->dm)
|
|
smd->coll->dm->release(smd->coll->dm);
|
|
|
|
smd->coll->dm = CDDM_copy(dm);
|
|
}
|
|
|
|
smd->time = scene->r.cfra;
|
|
if (scene->r.cfra < smd->time)
|
|
{
|
|
smokeModifier_reset_ex(smd, false);
|
|
}
|
|
}
|
|
else if (smd->type & MOD_SMOKE_TYPE_DOMAIN)
|
|
{
|
|
SmokeDomainSettings *sds = smd->domain;
|
|
PointCache *cache = NULL;
|
|
PTCacheID pid;
|
|
int startframe, endframe, framenr;
|
|
float timescale;
|
|
|
|
framenr = scene->r.cfra;
|
|
|
|
//printf("time: %d\n", scene->r.cfra);
|
|
|
|
cache = sds->point_cache[0];
|
|
BKE_ptcache_id_from_smoke(&pid, ob, smd);
|
|
BKE_ptcache_id_time(&pid, scene, framenr, &startframe, &endframe, ×cale);
|
|
|
|
if (!smd->domain->fluid || framenr == startframe)
|
|
{
|
|
BKE_ptcache_id_reset(scene, &pid, PTCACHE_RESET_OUTDATED);
|
|
smokeModifier_reset_ex(smd, false);
|
|
BKE_ptcache_validate(cache, framenr);
|
|
cache->flag &= ~PTCACHE_REDO_NEEDED;
|
|
}
|
|
|
|
if (!smd->domain->fluid && (framenr != startframe) && (smd->domain->flags & MOD_SMOKE_FILE_LOAD) == 0 && (cache->flag & PTCACHE_BAKED) == 0)
|
|
return;
|
|
|
|
smd->domain->flags &= ~MOD_SMOKE_FILE_LOAD;
|
|
CLAMP(framenr, startframe, endframe);
|
|
|
|
/* If already viewing a pre/after frame, no need to reload */
|
|
if ((smd->time == framenr) && (framenr != scene->r.cfra))
|
|
return;
|
|
|
|
if (smokeModifier_init(smd, ob, scene, dm) == 0)
|
|
{
|
|
printf("bad smokeModifier_init\n");
|
|
return;
|
|
}
|
|
|
|
/* only calculate something when we advanced a single frame */
|
|
/* don't simulate if viewing start frame, but scene frame is not real start frame */
|
|
bool can_simulate = (framenr == (int)smd->time + 1) && (framenr == scene->r.cfra);
|
|
|
|
/* try to read from cache */
|
|
if (BKE_ptcache_read(&pid, (float)framenr, can_simulate) == PTCACHE_READ_EXACT) {
|
|
BKE_ptcache_validate(cache, framenr);
|
|
smd->time = framenr;
|
|
return;
|
|
}
|
|
|
|
if (!can_simulate)
|
|
return;
|
|
|
|
#ifdef DEBUG_TIME
|
|
double start = PIL_check_seconds_timer();
|
|
#endif
|
|
|
|
/* if on second frame, write cache for first frame */
|
|
if ((int)smd->time == startframe && (cache->flag & PTCACHE_OUTDATED || cache->last_exact == 0)) {
|
|
BKE_ptcache_write(&pid, startframe);
|
|
}
|
|
|
|
// set new time
|
|
smd->time = scene->r.cfra;
|
|
|
|
/* do simulation */
|
|
|
|
// simulate the actual smoke (c++ code in intern/smoke)
|
|
// DG: interesting commenting this line + deactivating loading of noise files
|
|
if (framenr != startframe)
|
|
{
|
|
if (sds->flags & MOD_SMOKE_DISSOLVE) {
|
|
/* low res dissolve */
|
|
smoke_dissolve(sds->fluid, sds->diss_speed, sds->flags & MOD_SMOKE_DISSOLVE_LOG);
|
|
/* high res dissolve */
|
|
if (sds->wt) {
|
|
smoke_dissolve_wavelet(sds->wt, sds->diss_speed, sds->flags & MOD_SMOKE_DISSOLVE_LOG);
|
|
}
|
|
|
|
}
|
|
|
|
step(bmain, eval_ctx, scene, ob, smd, dm, scene->r.frs_sec / scene->r.frs_sec_base);
|
|
}
|
|
|
|
// create shadows before writing cache so they get stored
|
|
smoke_calc_transparency(sds, scene);
|
|
|
|
if (sds->wt && sds->total_cells > 1) {
|
|
smoke_turbulence_step(sds->wt, sds->fluid);
|
|
}
|
|
|
|
BKE_ptcache_validate(cache, framenr);
|
|
if (framenr != startframe)
|
|
BKE_ptcache_write(&pid, framenr);
|
|
|
|
#ifdef DEBUG_TIME
|
|
double end = PIL_check_seconds_timer();
|
|
printf("Frame: %d, Time: %f\n\n", (int)smd->time, (float)(end - start));
|
|
#endif
|
|
}
|
|
}
|
|
|
|
struct DerivedMesh *smokeModifier_do(SmokeModifierData *smd, Scene *scene, Object *ob, DerivedMesh *dm)
|
|
{
|
|
/* lock so preview render does not read smoke data while it gets modified */
|
|
if ((smd->type & MOD_SMOKE_TYPE_DOMAIN) && smd->domain)
|
|
BLI_rw_mutex_lock(smd->domain->fluid_mutex, THREAD_LOCK_WRITE);
|
|
|
|
/* Ugly G.main, hopefully won't be needed anymore in 2.8 */
|
|
smokeModifier_process(G.main, G.main->eval_ctx , smd, scene, ob, dm);
|
|
|
|
if ((smd->type & MOD_SMOKE_TYPE_DOMAIN) && smd->domain)
|
|
BLI_rw_mutex_unlock(smd->domain->fluid_mutex);
|
|
|
|
/* return generated geometry for adaptive domain */
|
|
if (smd->type & MOD_SMOKE_TYPE_DOMAIN && smd->domain &&
|
|
smd->domain->flags & MOD_SMOKE_ADAPTIVE_DOMAIN &&
|
|
smd->domain->base_res[0])
|
|
{
|
|
return createDomainGeometry(smd->domain, ob);
|
|
}
|
|
else {
|
|
return CDDM_copy(dm);
|
|
}
|
|
}
|
|
|
|
static float calc_voxel_transp(float *result, float *input, int res[3], int *pixel, float *tRay, float correct)
|
|
{
|
|
const size_t index = smoke_get_index(pixel[0], res[0], pixel[1], res[1], pixel[2]);
|
|
|
|
// T_ray *= T_vox
|
|
*tRay *= expf(input[index] * correct);
|
|
|
|
if (result[index] < 0.0f)
|
|
{
|
|
result[index] = *tRay;
|
|
}
|
|
|
|
return *tRay;
|
|
}
|
|
|
|
static void bresenham_linie_3D(int x1, int y1, int z1, int x2, int y2, int z2, float *tRay, bresenham_callback cb, float *result, float *input, int res[3], float correct)
|
|
{
|
|
int dx, dy, dz, i, l, m, n, x_inc, y_inc, z_inc, err_1, err_2, dx2, dy2, dz2;
|
|
int pixel[3];
|
|
|
|
pixel[0] = x1;
|
|
pixel[1] = y1;
|
|
pixel[2] = z1;
|
|
|
|
dx = x2 - x1;
|
|
dy = y2 - y1;
|
|
dz = z2 - z1;
|
|
|
|
x_inc = (dx < 0) ? -1 : 1;
|
|
l = abs(dx);
|
|
y_inc = (dy < 0) ? -1 : 1;
|
|
m = abs(dy);
|
|
z_inc = (dz < 0) ? -1 : 1;
|
|
n = abs(dz);
|
|
dx2 = l << 1;
|
|
dy2 = m << 1;
|
|
dz2 = n << 1;
|
|
|
|
if ((l >= m) && (l >= n)) {
|
|
err_1 = dy2 - l;
|
|
err_2 = dz2 - l;
|
|
for (i = 0; i < l; i++) {
|
|
if (cb(result, input, res, pixel, tRay, correct) <= FLT_EPSILON)
|
|
break;
|
|
if (err_1 > 0) {
|
|
pixel[1] += y_inc;
|
|
err_1 -= dx2;
|
|
}
|
|
if (err_2 > 0) {
|
|
pixel[2] += z_inc;
|
|
err_2 -= dx2;
|
|
}
|
|
err_1 += dy2;
|
|
err_2 += dz2;
|
|
pixel[0] += x_inc;
|
|
}
|
|
}
|
|
else if ((m >= l) && (m >= n)) {
|
|
err_1 = dx2 - m;
|
|
err_2 = dz2 - m;
|
|
for (i = 0; i < m; i++) {
|
|
if (cb(result, input, res, pixel, tRay, correct) <= FLT_EPSILON)
|
|
break;
|
|
if (err_1 > 0) {
|
|
pixel[0] += x_inc;
|
|
err_1 -= dy2;
|
|
}
|
|
if (err_2 > 0) {
|
|
pixel[2] += z_inc;
|
|
err_2 -= dy2;
|
|
}
|
|
err_1 += dx2;
|
|
err_2 += dz2;
|
|
pixel[1] += y_inc;
|
|
}
|
|
}
|
|
else {
|
|
err_1 = dy2 - n;
|
|
err_2 = dx2 - n;
|
|
for (i = 0; i < n; i++) {
|
|
if (cb(result, input, res, pixel, tRay, correct) <= FLT_EPSILON)
|
|
break;
|
|
if (err_1 > 0) {
|
|
pixel[1] += y_inc;
|
|
err_1 -= dz2;
|
|
}
|
|
if (err_2 > 0) {
|
|
pixel[0] += x_inc;
|
|
err_2 -= dz2;
|
|
}
|
|
err_1 += dy2;
|
|
err_2 += dx2;
|
|
pixel[2] += z_inc;
|
|
}
|
|
}
|
|
cb(result, input, res, pixel, tRay, correct);
|
|
}
|
|
|
|
static void smoke_calc_transparency(SmokeDomainSettings *sds, Scene *scene)
|
|
{
|
|
float bv[6] = {0};
|
|
float light[3];
|
|
int a, z, slabsize = sds->res[0] * sds->res[1], size = sds->res[0] * sds->res[1] * sds->res[2];
|
|
float *density = smoke_get_density(sds->fluid);
|
|
float correct = -7.0f * sds->dx;
|
|
|
|
if (!get_lamp(scene, light)) return;
|
|
|
|
/* convert light pos to sim cell space */
|
|
mul_m4_v3(sds->imat, light);
|
|
light[0] = (light[0] - sds->p0[0]) / sds->cell_size[0] - 0.5f - (float)sds->res_min[0];
|
|
light[1] = (light[1] - sds->p0[1]) / sds->cell_size[1] - 0.5f - (float)sds->res_min[1];
|
|
light[2] = (light[2] - sds->p0[2]) / sds->cell_size[2] - 0.5f - (float)sds->res_min[2];
|
|
|
|
for (a = 0; a < size; a++)
|
|
sds->shadow[a] = -1.0f;
|
|
|
|
/* calculate domain bounds in sim cell space */
|
|
// 0,2,4 = 0.0f
|
|
bv[1] = (float)sds->res[0]; // x
|
|
bv[3] = (float)sds->res[1]; // y
|
|
bv[5] = (float)sds->res[2]; // z
|
|
|
|
for (z = 0; z < sds->res[2]; z++)
|
|
{
|
|
size_t index = z * slabsize;
|
|
int x, y;
|
|
|
|
for (y = 0; y < sds->res[1]; y++)
|
|
for (x = 0; x < sds->res[0]; x++, index++)
|
|
{
|
|
float voxelCenter[3];
|
|
float pos[3];
|
|
int cell[3];
|
|
float tRay = 1.0;
|
|
|
|
if (sds->shadow[index] >= 0.0f)
|
|
continue;
|
|
voxelCenter[0] = (float)x;
|
|
voxelCenter[1] = (float)y;
|
|
voxelCenter[2] = (float)z;
|
|
|
|
// get starting cell (light pos)
|
|
if (BLI_bvhtree_bb_raycast(bv, light, voxelCenter, pos) > FLT_EPSILON)
|
|
{
|
|
// we're ouside -> use point on side of domain
|
|
cell[0] = (int)floor(pos[0]);
|
|
cell[1] = (int)floor(pos[1]);
|
|
cell[2] = (int)floor(pos[2]);
|
|
}
|
|
else {
|
|
// we're inside -> use light itself
|
|
cell[0] = (int)floor(light[0]);
|
|
cell[1] = (int)floor(light[1]);
|
|
cell[2] = (int)floor(light[2]);
|
|
}
|
|
/* clamp within grid bounds */
|
|
CLAMP(cell[0], 0, sds->res[0] - 1);
|
|
CLAMP(cell[1], 0, sds->res[1] - 1);
|
|
CLAMP(cell[2], 0, sds->res[2] - 1);
|
|
|
|
bresenham_linie_3D(cell[0], cell[1], cell[2], x, y, z, &tRay, calc_voxel_transp, sds->shadow, density, sds->res, correct);
|
|
|
|
// convention -> from a RGBA float array, use G value for tRay
|
|
sds->shadow[index] = tRay;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* get smoke velocity and density at given coordinates
|
|
* returns fluid density or -1.0f if outside domain*/
|
|
float smoke_get_velocity_at(struct Object *ob, float position[3], float velocity[3])
|
|
{
|
|
SmokeModifierData *smd = (SmokeModifierData *)modifiers_findByType(ob, eModifierType_Smoke);
|
|
zero_v3(velocity);
|
|
|
|
if (smd && (smd->type & MOD_SMOKE_TYPE_DOMAIN) && smd->domain && smd->domain->fluid) {
|
|
SmokeDomainSettings *sds = smd->domain;
|
|
float time_mult = 25.f * DT_DEFAULT;
|
|
float vel_mag;
|
|
float *velX = smoke_get_velocity_x(sds->fluid);
|
|
float *velY = smoke_get_velocity_y(sds->fluid);
|
|
float *velZ = smoke_get_velocity_z(sds->fluid);
|
|
float density = 0.0f, fuel = 0.0f;
|
|
float pos[3];
|
|
copy_v3_v3(pos, position);
|
|
smoke_pos_to_cell(sds, pos);
|
|
|
|
/* check if point is outside domain max bounds */
|
|
if (pos[0] < sds->res_min[0] || pos[1] < sds->res_min[1] || pos[2] < sds->res_min[2]) return -1.0f;
|
|
if (pos[0] > sds->res_max[0] || pos[1] > sds->res_max[1] || pos[2] > sds->res_max[2]) return -1.0f;
|
|
|
|
/* map pos between 0.0 - 1.0 */
|
|
pos[0] = (pos[0] - sds->res_min[0]) / ((float)sds->res[0]);
|
|
pos[1] = (pos[1] - sds->res_min[1]) / ((float)sds->res[1]);
|
|
pos[2] = (pos[2] - sds->res_min[2]) / ((float)sds->res[2]);
|
|
|
|
|
|
/* check if point is outside active area */
|
|
if (smd->domain->flags & MOD_SMOKE_ADAPTIVE_DOMAIN) {
|
|
if (pos[0] < 0.0f || pos[1] < 0.0f || pos[2] < 0.0f) return 0.0f;
|
|
if (pos[0] > 1.0f || pos[1] > 1.0f || pos[2] > 1.0f) return 0.0f;
|
|
}
|
|
|
|
/* get interpolated velocity */
|
|
velocity[0] = BLI_voxel_sample_trilinear(velX, sds->res, pos) * sds->global_size[0] * time_mult;
|
|
velocity[1] = BLI_voxel_sample_trilinear(velY, sds->res, pos) * sds->global_size[1] * time_mult;
|
|
velocity[2] = BLI_voxel_sample_trilinear(velZ, sds->res, pos) * sds->global_size[2] * time_mult;
|
|
|
|
/* convert velocity direction to global space */
|
|
vel_mag = len_v3(velocity);
|
|
mul_mat3_m4_v3(sds->obmat, velocity);
|
|
normalize_v3(velocity);
|
|
mul_v3_fl(velocity, vel_mag);
|
|
|
|
/* use max value of fuel or smoke density */
|
|
density = BLI_voxel_sample_trilinear(smoke_get_density(sds->fluid), sds->res, pos);
|
|
if (smoke_has_fuel(sds->fluid)) {
|
|
fuel = BLI_voxel_sample_trilinear(smoke_get_fuel(sds->fluid), sds->res, pos);
|
|
}
|
|
return MAX2(density, fuel);
|
|
}
|
|
return -1.0f;
|
|
}
|
|
|
|
int smoke_get_data_flags(SmokeDomainSettings *sds)
|
|
{
|
|
int flags = 0;
|
|
|
|
if (sds->fluid) {
|
|
if (smoke_has_heat(sds->fluid))
|
|
flags |= SM_ACTIVE_HEAT;
|
|
if (smoke_has_fuel(sds->fluid))
|
|
flags |= SM_ACTIVE_FIRE;
|
|
if (smoke_has_colors(sds->fluid))
|
|
flags |= SM_ACTIVE_COLORS;
|
|
}
|
|
|
|
return flags;
|
|
}
|
|
|
|
#endif /* WITH_SMOKE */
|