void free_pointdensities(Render *re)
{
Tex *tex;
if(re->scene->r.scemode & R_PREVIEWBUTS)
return;
for (tex= re->main->tex.first; tex; tex= tex->id.next) {
if(tex->id.us && tex->type==TEX_POINTDENSITY) {
free_pointdensity(re, tex);
}
}
}
void RE_sample_point_density(Scene *scene, PointDensity *pd,
int resolution, float *values)
{
const size_t resolution2 = resolution * resolution;
Object *object = pd->object;
size_t x, y, z;
float min[3], max[3], dim[3], mat[4][4];
if (object == NULL) {
sample_dummy_point_density(resolution, values);
return;
}
if (pd->source == TEX_PD_PSYS) {
ParticleSystem *psys;
if (pd->psys == 0) {
sample_dummy_point_density(resolution, values);
return;
}
psys = BLI_findlink(&object->particlesystem, pd->psys - 1);
if (psys == NULL) {
sample_dummy_point_density(resolution, values);
return;
}
particle_system_minmax(scene, object, psys, pd->radius, min, max);
}
else {
float radius[3] = {pd->radius, pd->radius, pd->radius};
float *loc, *size;
BKE_object_obdata_texspace_get(pd->object, NULL, &loc, &size, NULL);
sub_v3_v3v3(min, loc, size);
add_v3_v3v3(max, loc, size);
/* Adjust texture space to include density points on the boundaries. */
sub_v3_v3(min, radius);
add_v3_v3(max, radius);
}
sub_v3_v3v3(dim, max, min);
if (dim[0] <= 0.0f || dim[1] <= 0.0f || dim[2] <= 0.0f) {
sample_dummy_point_density(resolution, values);
return;
}
/* Same matricies/resolution as dupli_render_particle_set(). */
unit_m4(mat);
BLI_mutex_lock(&sample_mutex);
cache_pointdensity_ex(scene, pd, mat, mat, 1, 1);
for (z = 0; z < resolution; ++z) {
for (y = 0; y < resolution; ++y) {
for (x = 0; x < resolution; ++x) {
size_t index = z * resolution2 + y * resolution + x;
float texvec[3];
float age, vec[3];
TexResult texres;
copy_v3_v3(texvec, min);
texvec[0] += dim[0] * (float)x / (float)resolution;
texvec[1] += dim[1] * (float)y / (float)resolution;
texvec[2] += dim[2] * (float)z / (float)resolution;
pointdensity(pd, texvec, &texres, &age, vec);
pointdensity_color(pd, &texres, age, vec);
copy_v3_v3(&values[index*4 + 0], &texres.tr);
values[index*4 + 3] = texres.tin;
}
}
}
free_pointdensity(pd);
BLI_mutex_unlock(&sample_mutex);
}
