blender/intern/cycles/render/object.h
Lukas Toenne 5e1bbde01d 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

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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.
*/
#ifndef __OBJECT_H__
#define __OBJECT_H__
#include "util_boundbox.h"
#include "util_param.h"
#include "util_transform.h"
#include "util_types.h"
CCL_NAMESPACE_BEGIN
class Device;
class DeviceScene;
class Mesh;
class Progress;
class Scene;
struct Transform;
/* Object */
struct Particle {
float age;
float lifetime;
};
class Object {
public:
Mesh *mesh;
Transform tfm;
BoundBox bounds;
ustring name;
uint random_id;
int pass_id;
vector<ParamValue> attributes;
uint visibility;
MotionTransform motion;
bool use_motion;
bool use_holdout;
int particle_id;
vector<Particle> particles;
Object();
~Object();
void tag_update(Scene *scene);
void compute_bounds(bool motion_blur);
void apply_transform();
};
/* Object Manager */
class ObjectManager {
public:
bool need_update;
ObjectManager();
~ObjectManager();
void device_update(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
void device_update_transforms(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
void device_update_particles(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
void device_free(Device *device, DeviceScene *dscene);
void tag_update(Scene *scene);
void apply_static_transforms(Scene *scene, Progress& progress);
};
CCL_NAMESPACE_END
#endif /* __OBJECT_H__ */