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Particles: Add utility function to copy particles from one system to another

This commit is contained in:
Sergey Sharybin 2018-06-19 11:40:09 +02:00
parent 92c519ff17
commit aa3f0b0998
2 changed files with 48 additions and 0 deletions
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3
source/blender/blenkernel/BKE_particle.h
View File

@ -318,6 +318,9 @@ void BKE_particlesettings_free(struct ParticleSettings *part);
void psys_free_path_cache(struct ParticleSystem *psys, struct PTCacheEdit *edit);
void psys_free(struct Object *ob, struct ParticleSystem *psys);
/* Copy. */
void psys_copy_particles(struct ParticleSystem *psys_dst, struct ParticleSystem *psys_src);
bool psys_render_simplify_params(struct ParticleSystem *psys, struct ChildParticle *cpa, float *params);
void psys_interpolate_uvs(const struct MTFace *tface, int quad, const float w[4], float uvco[2]);

45
source/blender/blenkernel/intern/particle.c
View File

@ -653,6 +653,51 @@ void psys_free(Object *ob, ParticleSystem *psys)
}
}
void psys_copy_particles(ParticleSystem *psys_dst, ParticleSystem *psys_src)
{
/* Free existing particles. */
if (psys_dst->particles != psys_src->particles) {
psys_free_particles(psys_dst);
}
if (psys_dst->child != psys_src->child) {
psys_free_children(psys_dst);
}
/* Restore counters. */
psys_dst->totpart = psys_src->totpart;
psys_dst->totchild = psys_src->totchild;
/* Copy particles and children. */
psys_dst->particles = MEM_dupallocN(psys_src->particles);
psys_dst->child = MEM_dupallocN(psys_src->child);
if (psys_dst->part->type == PART_HAIR) {
ParticleData *pa;
int p;
for (p = 0, pa = psys_dst->particles; p < psys_dst->totpart; p++, pa++) {
pa->hair = MEM_dupallocN(pa->hair);
}
}
if (psys_dst->particles && (psys_dst->particles->keys || psys_dst->particles->boid)) {
ParticleKey *key = psys_dst->particles->keys;
BoidParticle *boid = psys_dst->particles->boid;
ParticleData *pa;
int p;
if (key != NULL) {
key = MEM_dupallocN(key);
}
if (boid != NULL) {
boid = MEM_dupallocN(boid);
}
for (p = 0, pa = psys_dst->particles; p < psys_dst->totpart; p++, pa++) {
if (boid != NULL) {
pa->boid = boid++;
}
if (key != NULL) {
pa->keys = key;
key += pa->totkey;
}
}
}
}
/************************************************/
/* Interpolation */
/************************************************/