425 lines
16 KiB
C
425 lines
16 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) 2007 by Janne Karhu.
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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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* Adaptive time step
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* Classical SPH
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* Copyright 2011-2012 AutoCRC
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#ifndef __BKE_PARTICLE_H__
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#define __BKE_PARTICLE_H__
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/** \file BKE_particle.h
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* \ingroup bke
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*/
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#include "BLI_utildefines.h"
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#include "DNA_particle_types.h"
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#include "DNA_object_types.h"
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struct ParticleSystemModifierData;
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struct ParticleSystem;
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struct ParticleKey;
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struct ParticleSettings;
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struct HairKey;
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struct Main;
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struct Group;
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struct Object;
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struct Scene;
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struct DerivedMesh;
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struct ModifierData;
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struct MTFace;
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struct MCol;
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struct MFace;
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struct MVert;
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struct IpoCurve;
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struct LatticeDeformData;
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struct LinkNode;
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struct KDTree;
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struct RNG;
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struct SurfaceModifierData;
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struct BVHTreeRay;
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struct BVHTreeRayHit;
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struct EdgeHash;
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#define PARTICLE_P ParticleData * pa; int p
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#define LOOP_PARTICLES for (p = 0, pa = psys->particles; p < psys->totpart; p++, pa++)
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#define LOOP_EXISTING_PARTICLES for (p = 0, pa = psys->particles; p < psys->totpart; p++, pa++) if (!(pa->flag & PARS_UNEXIST))
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#define LOOP_SHOWN_PARTICLES for (p = 0, pa = psys->particles; p < psys->totpart; p++, pa++) if (!(pa->flag & (PARS_UNEXIST | PARS_NO_DISP)))
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/* OpenMP: Can only advance one variable within loop definition. */
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#define LOOP_DYNAMIC_PARTICLES for (p = 0; p < psys->totpart; p++) if ((pa = psys->particles + p)->state.time > 0.0f)
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/* fast but sure way to get the modifier*/
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#define PARTICLE_PSMD ParticleSystemModifierData * psmd = sim->psmd ? sim->psmd : psys_get_modifier(sim->ob, sim->psys)
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/* common stuff that many particle functions need */
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typedef struct ParticleSimulationData {
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struct Scene *scene;
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struct Object *ob;
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struct ParticleSystem *psys;
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struct ParticleSystemModifierData *psmd;
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struct ListBase *colliders;
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/* Courant number. This is used to implement an adaptive time step. Only the
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* maximum value per time step is important. Only sph_integrate makes use of
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* this at the moment. Other solvers could, too. */
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float courant_num;
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} ParticleSimulationData;
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typedef struct SPHData {
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ParticleSystem *psys[10];
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ParticleData *pa;
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float mass;
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struct EdgeHash *eh;
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float *gravity;
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float hfac;
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/* Average distance to neighbours (other particles in the support domain),
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* for calculating the Courant number (adaptive time step). */
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int pass;
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float element_size;
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float flow[3];
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/* Integrator callbacks. This allows different SPH implementations. */
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void (*force_cb) (void *sphdata_v, ParticleKey *state, float *force, float *impulse);
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void (*density_cb) (void *rangedata_v, int index, float squared_dist);
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} SPHData;
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typedef struct ParticleTexture {
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float ivel; /* used in reset */
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float time, life, exist, size; /* used in init */
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float damp, gravity, field; /* used in physics */
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float length, clump, kink, effector; /* used in path caching */
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float rough1, rough2, roughe; /* used in path caching */
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} ParticleTexture;
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typedef struct ParticleSeam {
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float v0[3], v1[3];
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float nor[3], dir[3], tan[3];
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float length2;
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} ParticleSeam;
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typedef struct ParticleCacheKey {
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float co[3];
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float vel[3];
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float rot[4];
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float col[3];
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float time;
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int steps;
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} ParticleCacheKey;
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typedef struct ParticleThreadContext {
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/* shared */
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struct ParticleSimulationData sim;
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struct DerivedMesh *dm;
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struct Material *ma;
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/* distribution */
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struct KDTree *tree;
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struct ParticleSeam *seams;
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int totseam;
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float *jit, *jitoff, *weight;
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float maxweight;
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int *index, *skip, jitlevel;
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int from, cfrom, distr;
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struct ParticleData *tpars;
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/* path caching */
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int editupdate, between, steps;
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int totchild, totparent, parent_pass;
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float cfra;
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float *vg_length, *vg_clump, *vg_kink;
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float *vg_rough1, *vg_rough2, *vg_roughe;
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float *vg_effector;
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} ParticleThreadContext;
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typedef struct ParticleThread {
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ParticleThreadContext *ctx;
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struct RNG *rng, *rng_path;
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int num, tot;
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} ParticleThread;
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typedef struct ParticleBillboardData {
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struct Object *ob;
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float vec[3], vel[3];
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float offset[2];
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float size[2];
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float tilt, random, time;
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int uv[3];
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int lock, num;
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int totnum;
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int lifetime;
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short align, uv_split, anim, split_offset;
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} ParticleBillboardData;
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typedef struct ParticleCollisionElement {
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/* pointers to original data */
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float *x[4], *v[4];
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/* values interpolated from original data*/
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float x0[3], x1[3], x2[3], p[3];
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/* results for found intersection point */
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float nor[3], vel[3], uv[2];
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/* count of original data (1-4) */
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int tot;
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/* index of the collision face */
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int index;
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/* flags for inversed normal / particle already inside element at start */
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short inv_nor, inside;
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} ParticleCollisionElement;
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/* container for moving data between deflet_particle and particle_intersect_face */
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typedef struct ParticleCollision {
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struct Object *current;
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struct Object *hit;
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struct Object *prev;
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struct Object *skip;
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struct Object *emitter;
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struct CollisionModifierData *md; // collision modifier for current object;
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float f; // time factor of previous collision, needed for substracting face velocity
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float fac1, fac2;
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float cfra, old_cfra;
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float original_ray_length; //original length of co2-co1, needed for collision time evaluation
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int prev_index;
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ParticleCollisionElement pce;
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/* total_time is the amount of time in this subframe
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* inv_total_time is the opposite
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* inv_timestep is the inverse of the amount of time in this frame */
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float total_time, inv_total_time, inv_timestep;
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float radius;
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float co1[3], co2[3];
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float ve1[3], ve2[3];
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float acc[3], boid_z;
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int boid;
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} ParticleCollision;
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typedef struct ParticleDrawData {
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float *vdata, *vd; /* vertice data */
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float *ndata, *nd; /* normal data */
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float *cdata, *cd; /* color data */
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float *vedata, *ved; /* velocity data */
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float *ma_col;
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int tot_vec_size, flag;
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int totpoint, totve;
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} ParticleDrawData;
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#define PARTICLE_DRAW_DATA_UPDATED 1
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#define PSYS_FRAND_COUNT 1024
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extern unsigned int PSYS_FRAND_SEED_OFFSET[PSYS_FRAND_COUNT];
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extern unsigned int PSYS_FRAND_SEED_MULTIPLIER[PSYS_FRAND_COUNT];
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extern float PSYS_FRAND_BASE[PSYS_FRAND_COUNT];
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void psys_init_rng(void);
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BLI_INLINE float psys_frand(ParticleSystem *psys, unsigned int seed)
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{
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/* XXX far from ideal, this simply scrambles particle random numbers a bit
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* to avoid obvious correlations.
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* Can't use previous psys->frand arrays because these require initialization
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* inside psys_check_enabled, which wreaks havok in multithreaded depgraph updates.
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*/
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unsigned int offset = PSYS_FRAND_SEED_OFFSET[psys->seed % PSYS_FRAND_COUNT];
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unsigned int multiplier = PSYS_FRAND_SEED_MULTIPLIER[psys->seed % PSYS_FRAND_COUNT];
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return PSYS_FRAND_BASE[(offset + seed * multiplier) % PSYS_FRAND_COUNT];
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}
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BLI_INLINE void psys_frand_vec(ParticleSystem *psys, unsigned int seed, float vec[3])
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{
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unsigned int offset = PSYS_FRAND_SEED_OFFSET[psys->seed % PSYS_FRAND_COUNT];
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unsigned int multiplier = PSYS_FRAND_SEED_MULTIPLIER[psys->seed % PSYS_FRAND_COUNT];
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vec[0] = PSYS_FRAND_BASE[(offset + (seed + 0) * multiplier) % PSYS_FRAND_COUNT];
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vec[1] = PSYS_FRAND_BASE[(offset + (seed + 1) * multiplier) % PSYS_FRAND_COUNT];
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vec[2] = PSYS_FRAND_BASE[(offset + (seed + 2) * multiplier) % PSYS_FRAND_COUNT];
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}
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/* ----------- functions needed outside particlesystem ---------------- */
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/* particle.c */
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int count_particles(struct ParticleSystem *psys);
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int count_particles_mod(struct ParticleSystem *psys, int totgr, int cur);
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struct ParticleSystem *psys_get_current(struct Object *ob);
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/* for rna */
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short psys_get_current_num(struct Object *ob);
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void psys_set_current_num(Object *ob, int index);
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/* UNUSED */
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// struct Object *psys_find_object(struct Scene *scene, struct ParticleSystem *psys);
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struct LatticeDeformData *psys_create_lattice_deform_data(struct ParticleSimulationData *sim);
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int psys_in_edit_mode(struct Scene *scene, struct ParticleSystem *psys);
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int psys_check_enabled(struct Object *ob, struct ParticleSystem *psys);
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int psys_check_edited(struct ParticleSystem *psys);
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void psys_check_group_weights(struct ParticleSettings *part);
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int psys_uses_gravity(struct ParticleSimulationData *sim);
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/* free */
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void BKE_particlesettings_free(struct ParticleSettings *part);
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void psys_free_path_cache(struct ParticleSystem *psys, struct PTCacheEdit *edit);
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void psys_free(struct Object *ob, struct ParticleSystem *psys);
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void psys_render_set(struct Object *ob, struct ParticleSystem *psys, float viewmat[4][4], float winmat[4][4], int winx, int winy, int timeoffset);
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void psys_render_restore(struct Object *ob, struct ParticleSystem *psys);
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int psys_render_simplify_distribution(struct ParticleThreadContext *ctx, int tot);
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bool psys_render_simplify_params(struct ParticleSystem *psys, struct ChildParticle *cpa, float *params);
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void psys_interpolate_uvs(const struct MTFace *tface, int quad, const float w[4], float uvco[2]);
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void psys_interpolate_mcol(const struct MCol *mcol, int quad, const float w[4], struct MCol *mc);
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void copy_particle_key(struct ParticleKey *to, struct ParticleKey *from, int time);
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void psys_particle_on_emitter(struct ParticleSystemModifierData *psmd, int distr, int index, int index_dmcache,
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float fuv[4], float foffset, float vec[3], float nor[3],
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float utan[3], float vtan[3], float orco[3], float ornor[3]);
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struct ParticleSystemModifierData *psys_get_modifier(struct Object *ob, struct ParticleSystem *psys);
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struct ModifierData *object_add_particle_system(struct Scene *scene, struct Object *ob, const char *name);
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void object_remove_particle_system(struct Scene *scene, struct Object *ob);
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struct ParticleSettings *psys_new_settings(const char *name, struct Main *main);
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struct ParticleSettings *BKE_particlesettings_copy(struct ParticleSettings *part);
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void BKE_particlesettings_make_local(struct ParticleSettings *part);
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void psys_reset(struct ParticleSystem *psys, int mode);
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void psys_find_parents(struct ParticleSimulationData *sim);
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void psys_cache_paths(struct ParticleSimulationData *sim, float cfra);
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void psys_cache_edit_paths(struct Scene *scene, struct Object *ob, struct PTCacheEdit *edit, float cfra);
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void psys_cache_child_paths(struct ParticleSimulationData *sim, float cfra, int editupdate);
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int do_guides(struct ListBase *effectors, ParticleKey *state, int pa_num, float time);
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void precalc_guides(struct ParticleSimulationData *sim, struct ListBase *effectors);
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float psys_get_timestep(struct ParticleSimulationData *sim);
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float psys_get_child_time(struct ParticleSystem *psys, struct ChildParticle *cpa, float cfra, float *birthtime, float *dietime);
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float psys_get_child_size(struct ParticleSystem *psys, struct ChildParticle *cpa, float cfra, float *pa_time);
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void psys_get_particle_on_path(struct ParticleSimulationData *sim, int pa_num, struct ParticleKey *state, const bool vel);
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int psys_get_particle_state(struct ParticleSimulationData *sim, int p, struct ParticleKey *state, int always);
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void psys_sph_init(struct ParticleSimulationData *sim, struct SPHData *sphdata);
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void psys_sph_finalise(struct SPHData *sphdata);
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void psys_sph_density(struct BVHTree *tree, struct SPHData *data, float co[3], float vars[2]);
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/* for anim.c */
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void psys_get_dupli_texture(struct ParticleSystem *psys, struct ParticleSettings *part,
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struct ParticleSystemModifierData *psmd, struct ParticleData *pa, struct ChildParticle *cpa,
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float uv[2], float orco[3]);
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void psys_get_dupli_path_transform(struct ParticleSimulationData *sim, struct ParticleData *pa, struct ChildParticle *cpa,
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struct ParticleCacheKey *cache, float mat[4][4], float *scale);
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ParticleThread *psys_threads_create(struct ParticleSimulationData *sim);
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void psys_threads_free(ParticleThread *threads);
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void psys_make_billboard(ParticleBillboardData *bb, float xvec[3], float yvec[3], float zvec[3], float center[3]);
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void psys_apply_hair_lattice(struct Scene *scene, struct Object *ob, struct ParticleSystem *psys);
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/* particle_system.c */
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struct ParticleSystem *psys_get_target_system(struct Object *ob, struct ParticleTarget *pt);
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void psys_count_keyed_targets(struct ParticleSimulationData *sim);
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void psys_update_particle_tree(struct ParticleSystem *psys, float cfra);
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void psys_changed_type(struct Object *ob, struct ParticleSystem *psys);
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void psys_make_temp_pointcache(struct Object *ob, struct ParticleSystem *psys);
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void psys_get_pointcache_start_end(struct Scene *scene, ParticleSystem *psys, int *sfra, int *efra);
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void psys_check_boid_data(struct ParticleSystem *psys);
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void psys_get_birth_coordinates(struct ParticleSimulationData *sim, struct ParticleData *pa, struct ParticleKey *state, float dtime, float cfra);
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void particle_system_update(struct Scene *scene, struct Object *ob, struct ParticleSystem *psys);
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/* ----------- functions needed only inside particlesystem ------------ */
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/* particle.c */
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void psys_disable_all(struct Object *ob);
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void psys_enable_all(struct Object *ob);
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void free_hair(struct Object *ob, struct ParticleSystem *psys, int dynamics);
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void free_keyed_keys(struct ParticleSystem *psys);
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void psys_free_particles(struct ParticleSystem *psys);
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void psys_free_children(struct ParticleSystem *psys);
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void psys_interpolate_particle(short type, struct ParticleKey keys[4], float dt, struct ParticleKey *result, int velocity);
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void psys_vec_rot_to_face(struct DerivedMesh *dm, struct ParticleData *pa, float vec[3]);
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void psys_mat_hair_to_object(struct Object *ob, struct DerivedMesh *dm, short from, struct ParticleData *pa, float hairmat[4][4]);
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void psys_mat_hair_to_global(struct Object *ob, struct DerivedMesh *dm, short from, struct ParticleData *pa, float hairmat[4][4]);
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void psys_mat_hair_to_orco(struct Object *ob, struct DerivedMesh *dm, short from, struct ParticleData *pa, float hairmat[4][4]);
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float psys_get_dietime_from_cache(struct PointCache *cache, int index);
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void psys_free_pdd(struct ParticleSystem *psys);
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float *psys_cache_vgroup(struct DerivedMesh *dm, struct ParticleSystem *psys, int vgroup);
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void psys_get_texture(struct ParticleSimulationData *sim, struct ParticleData *pa, struct ParticleTexture *ptex, int event, float cfra);
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void psys_interpolate_face(struct MVert *mvert, struct MFace *mface, struct MTFace *tface,
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float (*orcodata)[3], float w[4], float vec[3], float nor[3], float utan[3], float vtan[3],
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float orco[3], float ornor[3]);
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float psys_particle_value_from_verts(struct DerivedMesh *dm, short from, struct ParticleData *pa, float *values);
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void psys_get_from_key(struct ParticleKey *key, float loc[3], float vel[3], float rot[4], float *time);
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/* BLI_bvhtree_ray_cast callback */
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void BKE_psys_collision_neartest_cb(void *userdata, int index, const struct BVHTreeRay *ray, struct BVHTreeRayHit *hit);
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void psys_particle_on_dm(struct DerivedMesh *dm, int from, int index, int index_dmcache,
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const float fw[4], float foffset, float vec[3], float nor[3], float utan[3], float vtan[3],
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float orco[3], float ornor[3]);
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/* particle_system.c */
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void initialize_particle(struct ParticleData *pa);
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void psys_calc_dmcache(struct Object *ob, struct DerivedMesh *dm, struct ParticleSystem *psys);
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int psys_particle_dm_face_lookup(struct Object *ob, struct DerivedMesh *dm, int index, const float fw[4], struct LinkNode *node);
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void reset_particle(struct ParticleSimulationData *sim, struct ParticleData *pa, float dtime, float cfra);
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float psys_get_current_display_percentage(struct ParticleSystem *psys);
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/* psys_reset */
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#define PSYS_RESET_ALL 1
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#define PSYS_RESET_DEPSGRAPH 2
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/* #define PSYS_RESET_CHILDREN 3 */ /*UNUSED*/
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#define PSYS_RESET_CACHE_MISS 4
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/* index_dmcache */
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#define DMCACHE_NOTFOUND -1
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#define DMCACHE_ISCHILD -2
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#endif
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