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/*
* 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 "mesh.h"
#include "object.h"
#include "particles.h"
#include "blender_sync.h"
#include "blender_util.h"
#include "util_foreach.h"
CCL_NAMESPACE_BEGIN
/* Utilities */
bool BlenderSync::sync_dupli_particle(BL::Object b_ob, BL::DupliObject b_dup, Object *object)
{
/* test if this dupli was generated from a particle sytem */
BL::ParticleSystem b_psys = b_dup.particle_system();
if(!b_psys)
return false;
/* test if we need particle data */
if(!object->mesh->need_attribute(scene, ATTR_STD_PARTICLE))
return false;
/* don't handle child particles yet */
BL::Array<int, OBJECT_PERSISTENT_ID_SIZE> persistent_id = b_dup.persistent_id();
if(persistent_id[0] >= b_psys.particles.length())
return false;
/* find particle system */
ParticleSystemKey key(b_ob, persistent_id);
ParticleSystem *psys;
bool first_use = !particle_system_map.is_used(key);
bool need_update = particle_system_map.sync(&psys, b_ob, b_dup.object(), key);
/* no update needed? */
if(!need_update && !object->mesh->need_update && !scene->object_manager->need_update)
return true;
/* first time used in this sync loop? clear and tag update */
if(first_use) {
psys->particles.clear();
psys->tag_update(scene);
}
/* add particle */
BL::Particle b_pa = b_psys.particles[persistent_id[0]];
Particle pa;
pa.index = persistent_id[0];
pa.age = b_scene.frame_current() - b_pa.birth_time();
pa.lifetime = b_pa.lifetime();
pa.location = get_float3(b_pa.location());
pa.rotation = get_float4(b_pa.rotation());
pa.size = b_pa.size();
pa.velocity = get_float3(b_pa.velocity());
pa.angular_velocity = get_float3(b_pa.angular_velocity());
psys->particles.push_back(pa);
/* return that this object has particle data */
return true;
}
CCL_NAMESPACE_END
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