diff options
Diffstat (limited to 'intern/cycles/blender/blender_particles.cpp')
| -rw-r--r-- | intern/cycles/blender/blender_particles.cpp | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/intern/cycles/blender/blender_particles.cpp b/intern/cycles/blender/blender_particles.cpp new file mode 100644 index 00000000000..f591aaa6d83 --- /dev/null +++ b/intern/cycles/blender/blender_particles.cpp @@ -0,0 +1,162 @@ +/* + * Copyright 2011, Blender Foundation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include "object.h" + +#include "mesh.h" +#include "blender_sync.h" +#include "blender_util.h" + +#include "util_foreach.h" + +CCL_NAMESPACE_BEGIN + +/* Utilities */ + + +/* Particles Sync */ + +bool BlenderSync::object_use_particles(BL::Object b_ob) +{ + /* Particle data is only needed for + * a) Billboard render mode if object's own material uses particle info + * b) object/group render mode if any dupli object's material uses particle info + * + * Note: Meshes have to be synced at this point! + */ + bool use_particles = false; + + BL::Object::particle_systems_iterator b_psys; + for (b_ob.particle_systems.begin(b_psys); b_psys != b_ob.particle_systems.end(); ++b_psys) { + switch (b_psys->settings().render_type()) { + /* XXX not implemented yet! + * billboards/strands would become part of the mesh data (?), + * so the mesh attributes would store whether particle info is required. + */ + #if 0 + case BL::ParticleSettings::render_type_BILLBOARD: + case BL::ParticleSettings::render_type_PATH: { /* for strand rendering */ + BL::ID key = (BKE_object_is_modified(b_ob))? b_ob: b_ob.data(); + Mesh *mesh = mesh_map.find(key); + if (mesh) { + use_particles |= mesh->need_attribute(scene, ATTR_STD_PARTICLE); + } + break; + } + #endif + + case BL::ParticleSettings::render_type_OBJECT: { + BL::Object b_dupli_ob = b_psys->settings().dupli_object(); + if (b_dupli_ob) { + BL::ID key = (BKE_object_is_modified(b_dupli_ob))? b_dupli_ob: b_dupli_ob.data(); + Mesh *mesh = mesh_map.find(key); + if (mesh) { + use_particles |= mesh->need_attribute(scene, ATTR_STD_PARTICLE); + } + } + break; + } + + case BL::ParticleSettings::render_type_GROUP: { + BL::Group b_dupli_group = b_psys->settings().dupli_group(); + if (b_dupli_group) { + BL::Group::objects_iterator b_gob; + for (b_dupli_group.objects.begin(b_gob); b_gob != b_dupli_group.objects.end(); ++b_gob) { + BL::ID key = (BKE_object_is_modified(*b_gob))? *b_gob: b_gob->data(); + Mesh *mesh = mesh_map.find(key); + if (mesh) { + use_particles |= mesh->need_attribute(scene, ATTR_STD_PARTICLE); + } + } + } + break; + } + + default: + /* avoid compiler warning */ + break; + } + } + + return use_particles; +} + +static bool use_particle_system(BL::ParticleSystem b_psys) +{ + /* only use duplicator particles? disabled particle info for + * halo and billboard to reduce particle count. + * Probably not necessary since particles don't contain a huge amount + * of data compared to other textures. + */ + #if 0 + int render_type = b_psys->settings().render_type(); + return (render_type == BL::ParticleSettings::render_type_OBJECT + || render_type == BL::ParticleSettings::render_type_GROUP); + #endif + + return true; +} + +static bool use_particle(BL::Particle b_pa) +{ + return b_pa.is_exist() && b_pa.is_visible() && b_pa.alive_state()==BL::Particle::alive_state_ALIVE; +} + +int BlenderSync::object_count_particles(BL::Object b_ob) +{ + int tot = 0; + BL::Object::particle_systems_iterator b_psys; + for(b_ob.particle_systems.begin(b_psys); b_psys != b_ob.particle_systems.end(); ++b_psys) { + if (use_particle_system(*b_psys)) { + BL::ParticleSystem::particles_iterator b_pa; + for(b_psys->particles.begin(b_pa); b_pa != b_psys->particles.end(); ++b_pa) { + if(use_particle(*b_pa)) + ++tot; + } + } + } + return tot; +} + +void BlenderSync::sync_particles(Object *ob, BL::Object b_ob) +{ + int tot = object_count_particles(b_ob); + + ob->particles.clear(); + ob->particles.reserve(tot); + + int index; + BL::Object::particle_systems_iterator b_psys; + for(b_ob.particle_systems.begin(b_psys); b_psys != b_ob.particle_systems.end(); ++b_psys) { + if (use_particle_system(*b_psys)) { + BL::ParticleSystem::particles_iterator b_pa; + for(b_psys->particles.begin(b_pa), index = 0; b_pa != b_psys->particles.end(); ++b_pa, ++index) { + if(use_particle(*b_pa)) { + Particle pa; + + pa.age = b_scene.frame_current() - b_pa->birth_time(); + pa.lifetime = b_pa->lifetime(); + + ob->particles.push_back(pa); + } + } + } + } +} + +CCL_NAMESPACE_END |