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blender-archive/intern/cycles/blender/blender_particles.cpp

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Particle Info node for Cycles. This can be used to access particle information in material shaders for dupli objects. For now only the particle Age and individual Lifetime (in frames) are supported, more attributes can be added when needed. The particle data is stored in a separate texture if any of the dupli objects uses particle info nodes in shaders. To map dupli objects onto particles the store an additional particle_index value, which is different from the simple dupli object index (only visible particles, also works for particle dupli groups mode). Some simple use cases on the code.blender.org blog: http://code.blender.org/index.php/2012/05/particle-info-node/
2012-06-08 16:17:57 +00:00
/*
* 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"
Fix #33113: cycles not rendering motion blur correct with dying particles. There were a bunch of other issues with dupli motion blur and syncing, the problem being that there was no proper way to detect corresponding duplis between frames or updates. As a solution, a persistent_id was added to the DupliObject. It's an extension of the previous index value, with one index for each dupli level. This can be used to reliably find matching dupli objects between frames. Works with nested duplis, multiple particle systems, etc.
2012-11-08 16:35:28 +00:00
#include "object.h"
Fix for #32184 and redesign of particle storage in Cycles. The particle data used by the Particle Info node was stored in cycles as a list in each object. This is a problem when the particle emitter mesh is hidden: Objects in cycles are only intended as instances of renderable meshes, so when hiding the emitter mesh the particle data doesn't get stored either. Also the particle data can potentially be copied to multiple instances of the same object, which is a waste of texture space. The solution in this patch is to make a completely separate list of particle systems in the Cycles scene data. This way the particle data can be generated even when the emitter object itself is not visible.
2012-08-31 17:27:08 +00:00
#include "particles.h"
Particle Info node for Cycles. This can be used to access particle information in material shaders for dupli objects. For now only the particle Age and individual Lifetime (in frames) are supported, more attributes can be added when needed. The particle data is stored in a separate texture if any of the dupli objects uses particle info nodes in shaders. To map dupli objects onto particles the store an additional particle_index value, which is different from the simple dupli object index (only visible particles, also works for particle dupli groups mode). Some simple use cases on the code.blender.org blog: http://code.blender.org/index.php/2012/05/particle-info-node/
2012-06-08 16:17:57 +00:00
#include "blender_sync.h"
#include "blender_util.h"
#include "util_foreach.h"
CCL_NAMESPACE_BEGIN
/* Utilities */
Fix #33113: cycles not rendering motion blur correct with dying particles. There were a bunch of other issues with dupli motion blur and syncing, the problem being that there was no proper way to detect corresponding duplis between frames or updates. As a solution, a persistent_id was added to the DupliObject. It's an extension of the previous index value, with one index for each dupli level. This can be used to reliably find matching dupli objects between frames. Works with nested duplis, multiple particle systems, etc.
2012-11-08 16:35:28 +00:00
bool BlenderSync::sync_dupli_particle(BL::Object b_ob, BL::DupliObject b_dup, Object *object)
Fix for #32184 and redesign of particle storage in Cycles. The particle data used by the Particle Info node was stored in cycles as a list in each object. This is a problem when the particle emitter mesh is hidden: Objects in cycles are only intended as instances of renderable meshes, so when hiding the emitter mesh the particle data doesn't get stored either. Also the particle data can potentially be copied to multiple instances of the same object, which is a waste of texture space. The solution in this patch is to make a completely separate list of particle systems in the Cycles scene data. This way the particle data can be generated even when the emitter object itself is not visible.
2012-08-31 17:27:08 +00:00
{
Fix #33113: cycles not rendering motion blur correct with dying particles. There were a bunch of other issues with dupli motion blur and syncing, the problem being that there was no proper way to detect corresponding duplis between frames or updates. As a solution, a persistent_id was added to the DupliObject. It's an extension of the previous index value, with one index for each dupli level. This can be used to reliably find matching dupli objects between frames. Works with nested duplis, multiple particle systems, etc.
2012-11-08 16:35:28 +00:00
/* test if this dupli was generated from a particle sytem */
BL::ParticleSystem b_psys = b_dup.particle_system();
if(!b_psys)
return false;
Fix #32912: cycles crash with dead particles, actual crash was caused by an inconsistency in the particle system code, using <= and <. Also tightened up checks on cycles side to avoid other potential crashes.
2012-10-18 15:00:32 +00:00
Fix #33113: cycles not rendering motion blur correct with dying particles. There were a bunch of other issues with dupli motion blur and syncing, the problem being that there was no proper way to detect corresponding duplis between frames or updates. As a solution, a persistent_id was added to the DupliObject. It's an extension of the previous index value, with one index for each dupli level. This can be used to reliably find matching dupli objects between frames. Works with nested duplis, multiple particle systems, etc.
2012-11-08 16:35:28 +00:00
/* test if we need particle data */
if(!object->mesh->need_attribute(scene, ATTR_STD_PARTICLE))
return false;
Fix #32912: cycles crash with dead particles, actual crash was caused by an inconsistency in the particle system code, using <= and <. Also tightened up checks on cycles side to avoid other potential crashes.
2012-10-18 15:00:32 +00:00
Fix #33113: cycles not rendering motion blur correct with dying particles. There were a bunch of other issues with dupli motion blur and syncing, the problem being that there was no proper way to detect corresponding duplis between frames or updates. As a solution, a persistent_id was added to the DupliObject. It's an extension of the previous index value, with one index for each dupli level. This can be used to reliably find matching dupli objects between frames. Works with nested duplis, multiple particle systems, etc.
2012-11-08 16:35:28 +00:00
/* don't handle child particles yet */
BL::Array<int, OBJECT_PERSISTENT_ID_SIZE> persistent_id = b_dup.persistent_id();
Fix for #32184 and redesign of particle storage in Cycles. The particle data used by the Particle Info node was stored in cycles as a list in each object. This is a problem when the particle emitter mesh is hidden: Objects in cycles are only intended as instances of renderable meshes, so when hiding the emitter mesh the particle data doesn't get stored either. Also the particle data can potentially be copied to multiple instances of the same object, which is a waste of texture space. The solution in this patch is to make a completely separate list of particle systems in the Cycles scene data. This way the particle data can be generated even when the emitter object itself is not visible.
2012-08-31 17:27:08 +00:00
Fix #33113: cycles not rendering motion blur correct with dying particles. There were a bunch of other issues with dupli motion blur and syncing, the problem being that there was no proper way to detect corresponding duplis between frames or updates. As a solution, a persistent_id was added to the DupliObject. It's an extension of the previous index value, with one index for each dupli level. This can be used to reliably find matching dupli objects between frames. Works with nested duplis, multiple particle systems, etc.
2012-11-08 16:35:28 +00:00
if(persistent_id[0] >= b_psys.particles.length())
return false;
Fix #32912: cycles crash with dead particles, actual crash was caused by an inconsistency in the particle system code, using <= and <. Also tightened up checks on cycles side to avoid other potential crashes.
2012-10-18 15:00:32 +00:00
Fix #33113: cycles not rendering motion blur correct with dying particles. There were a bunch of other issues with dupli motion blur and syncing, the problem being that there was no proper way to detect corresponding duplis between frames or updates. As a solution, a persistent_id was added to the DupliObject. It's an extension of the previous index value, with one index for each dupli level. This can be used to reliably find matching dupli objects between frames. Works with nested duplis, multiple particle systems, etc.
2012-11-08 16:35:28 +00:00
/* find particle system */
ParticleSystemKey key(b_ob, persistent_id);
ParticleSystem *psys;
Fix #32912: cycles crash with dead particles, actual crash was caused by an inconsistency in the particle system code, using <= and <. Also tightened up checks on cycles side to avoid other potential crashes.
2012-10-18 15:00:32 +00:00
Fix #33113: cycles not rendering motion blur correct with dying particles. There were a bunch of other issues with dupli motion blur and syncing, the problem being that there was no proper way to detect corresponding duplis between frames or updates. As a solution, a persistent_id was added to the DupliObject. It's an extension of the previous index value, with one index for each dupli level. This can be used to reliably find matching dupli objects between frames. Works with nested duplis, multiple particle systems, etc.
2012-11-08 16:35:28 +00:00
bool first_use = !particle_system_map.is_used(key);
bool need_update = particle_system_map.sync(&psys, b_ob, b_dup.object(), key);
Particle Info node for Cycles. This can be used to access particle information in material shaders for dupli objects. For now only the particle Age and individual Lifetime (in frames) are supported, more attributes can be added when needed. The particle data is stored in a separate texture if any of the dupli objects uses particle info nodes in shaders. To map dupli objects onto particles the store an additional particle_index value, which is different from the simple dupli object index (only visible particles, also works for particle dupli groups mode). Some simple use cases on the code.blender.org blog: http://code.blender.org/index.php/2012/05/particle-info-node/
2012-06-08 16:17:57 +00:00
Fix #33113: cycles not rendering motion blur correct with dying particles. There were a bunch of other issues with dupli motion blur and syncing, the problem being that there was no proper way to detect corresponding duplis between frames or updates. As a solution, a persistent_id was added to the DupliObject. It's an extension of the previous index value, with one index for each dupli level. This can be used to reliably find matching dupli objects between frames. Works with nested duplis, multiple particle systems, etc.
2012-11-08 16:35:28 +00:00
/* no update needed? */
if(!need_update && !object->mesh->need_update && !scene->object_manager->need_update)
return true;
Fix #32912: cycles crash with dead particles, actual crash was caused by an inconsistency in the particle system code, using <= and <. Also tightened up checks on cycles side to avoid other potential crashes.
2012-10-18 15:00:32 +00:00
Fix #33113: cycles not rendering motion blur correct with dying particles. There were a bunch of other issues with dupli motion blur and syncing, the problem being that there was no proper way to detect corresponding duplis between frames or updates. As a solution, a persistent_id was added to the DupliObject. It's an extension of the previous index value, with one index for each dupli level. This can be used to reliably find matching dupli objects between frames. Works with nested duplis, multiple particle systems, etc.
2012-11-08 16:35:28 +00:00
/* first time used in this sync loop? clear and tag update */
if(first_use) {
Fix for #32184 and redesign of particle storage in Cycles. The particle data used by the Particle Info node was stored in cycles as a list in each object. This is a problem when the particle emitter mesh is hidden: Objects in cycles are only intended as instances of renderable meshes, so when hiding the emitter mesh the particle data doesn't get stored either. Also the particle data can potentially be copied to multiple instances of the same object, which is a waste of texture space. The solution in this patch is to make a completely separate list of particle systems in the Cycles scene data. This way the particle data can be generated even when the emitter object itself is not visible.
2012-08-31 17:27:08 +00:00
psys->particles.clear();
Cycles: Tag particle systems after syncing to make sure the particle system manager updates the device data.
2012-08-31 19:39:03 +00:00
psys->tag_update(scene);
Particle Info node for Cycles. This can be used to access particle information in material shaders for dupli objects. For now only the particle Age and individual Lifetime (in frames) are supported, more attributes can be added when needed. The particle data is stored in a separate texture if any of the dupli objects uses particle info nodes in shaders. To map dupli objects onto particles the store an additional particle_index value, which is different from the simple dupli object index (only visible particles, also works for particle dupli groups mode). Some simple use cases on the code.blender.org blog: http://code.blender.org/index.php/2012/05/particle-info-node/
2012-06-08 16:17:57 +00:00
}
Fix #33113: cycles not rendering motion blur correct with dying particles. There were a bunch of other issues with dupli motion blur and syncing, the problem being that there was no proper way to detect corresponding duplis between frames or updates. As a solution, a persistent_id was added to the DupliObject. It's an extension of the previous index value, with one index for each dupli level. This can be used to reliably find matching dupli objects between frames. Works with nested duplis, multiple particle systems, etc.
2012-11-08 16:35:28 +00:00
/* 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;
Particle Info node for Cycles. This can be used to access particle information in material shaders for dupli objects. For now only the particle Age and individual Lifetime (in frames) are supported, more attributes can be added when needed. The particle data is stored in a separate texture if any of the dupli objects uses particle info nodes in shaders. To map dupli objects onto particles the store an additional particle_index value, which is different from the simple dupli object index (only visible particles, also works for particle dupli groups mode). Some simple use cases on the code.blender.org blog: http://code.blender.org/index.php/2012/05/particle-info-node/
2012-06-08 16:17:57 +00:00
}
CCL_NAMESPACE_END
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