320 lines
13 KiB
C
320 lines
13 KiB
C
/* BKE_particle.h
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*
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*
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* $Id$
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*
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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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* Contributor(s): none yet.
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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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#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 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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#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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#define PSYS_FRAND_COUNT 1024
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#define PSYS_FRAND(seed) psys->frand[(seed) % PSYS_FRAND_COUNT]
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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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} ParticleSimulationData;
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//typedef struct ParticleReactEvent {
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// struct ParticleReactEvent *next, *prev;
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// int event, pa_num;
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// Object *ob;
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// struct ParticleSystem *psys;
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// struct ParticleKey state;
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//
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// float time, size;
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//}ParticleReactEvent;
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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 pvel[3]; /* 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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{
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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, 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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short align, uv_split, anim, split_offset;
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} ParticleBillboardData;
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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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{
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struct Object *ob, *hit_ob; // collided and current objects
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struct CollisionModifierData *md, *hit_md; // collision modifiers for current and hit object;
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float nor[3]; // normal at collision point
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float vel[3]; // velocity of collision point
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float co1[3], co2[3]; // ray start and end points
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float ve1[3], ve2[3]; // particle velocities
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float ray_len; // original length of co2-co1, needed for collision time evaluation
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float t; // time of previous collision, needed for substracting face velocity
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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_r, *ma_g, *ma_b;
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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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/* ----------- 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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struct Object *psys_find_object(struct Scene *scene, struct ParticleSystem *psys);
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struct Object *psys_get_lattice(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 psys_free_settings(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], float winmat[][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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int psys_render_simplify_params(struct ParticleSystem *psys, struct ChildParticle *cpa, float *params);
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void psys_interpolate_uvs(struct MTFace *tface, int quad, float *uv, float *uvco);
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void psys_interpolate_mcol(struct MCol *mcol, int quad, float *uv, 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, float *fuv, float foffset, float *vec, float *nor, float *utan, float *vtan, float *orco, float *ornor);
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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, 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(char *name, struct Main *main);
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struct ParticleSettings *psys_copy_settings(struct ParticleSettings *part);
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void make_local_particlesettings(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, int vel);
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int psys_get_particle_state(struct ParticleSimulationData *sim, int p, struct ParticleKey *state, int always);
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/* for anim.c */
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void psys_get_dupli_texture(struct Object *ob, struct ParticleSettings *part, struct ParticleSystemModifierData *psmd, struct ParticleData *pa, struct ChildParticle *cpa, float *uv, float *orco);
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void psys_get_dupli_path_transform(struct ParticleSimulationData *sim, struct ParticleData *pa, struct ChildParticle *cpa, struct ParticleCacheKey *cache, float mat[][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_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 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);
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void psys_mat_hair_to_object(struct Object *ob, struct DerivedMesh *dm, short from, struct ParticleData *pa, float hairmat[][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]);
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void psys_mat_hair_to_orco(struct Object *ob, struct DerivedMesh *dm, short from, struct ParticleData *pa, float hairmat[][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 Material *ma, struct ParticleData *pa, struct ParticleTexture *ptex, int event);
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void psys_interpolate_face(struct MVert *mvert, struct MFace *mface, struct MTFace *tface, float (*orcodata)[3], float *uv, float *vec, float *nor, float *utan, float *vtan, float *orco, float *ornor);
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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, float *vel, float *rot, float *time);
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/* only in edisparticle.c*/
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int psys_intersect_dm(struct Scene *scene, struct Object *ob, struct DerivedMesh *dm, float *vert_cos, float *co1, float* co2, float *min_d, int *min_face, float *min_uv, float *face_minmax, float *pa_minmax, float radius, float *ipoint);
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/* BLI_bvhtree_ray_cast callback */
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void particle_intersect_face(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, float *fw, float foffset, float *vec, float *nor, float *utan, float *vtan, float *orco, float *ornor);
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/* particle_system.c */
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void initialize_particle(struct ParticleSimulationData *sim, struct ParticleData *pa, int p);
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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, float *fw, struct LinkNode *node);
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void reset_particle(struct ParticleSimulationData *sim, struct ParticleData *pa, float dtime, float cfra);
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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
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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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