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/

1 files changed, 4 insertions, 1 deletions

diff --git a/intern/cycles/blender/blender_sync.h b/intern/cycles/blender/blender_sync.h
index bc6258d35ac..8c31c4b86ba 100644
--- a/intern/cycles/blender/blender_sync.h
+++ b/intern/cycles/blender/blender_sync.h
@@ -80,17 +80,20 @@ private:
 
 	void sync_nodes(Shader *shader, BL::ShaderNodeTree b_ntree);
 	Mesh *sync_mesh(BL::Object b_ob, bool object_updated);
-	void sync_object(BL::Object b_parent, int b_index, BL::Object b_object, Transform& tfm, uint layer_flag, int motion);
+	void sync_object(BL::Object b_parent, int b_index, BL::Object b_object, Transform& tfm, uint layer_flag, int motion, int particle_id);
 	void sync_light(BL::Object b_parent, int b_index, BL::Object b_ob, Transform& tfm);
 	void sync_background_light();
 	void sync_mesh_motion(BL::Object b_ob, Mesh *mesh, int motion);
 	void sync_camera_motion(BL::Object b_ob, int motion);
+	void sync_particles(Object *ob, BL::Object b_ob);
 
 	/* util */
 	void find_shader(BL::ID id, vector<uint>& used_shaders, int default_shader);
 	bool BKE_object_is_modified(BL::Object b_ob);
 	bool object_is_mesh(BL::Object b_ob);
 	bool object_is_light(BL::Object b_ob);
+	bool object_use_particles(BL::Object b_ob);
+	int object_count_particles(BL::Object b_ob);
 
 	/* variables */
 	BL::BlendData b_data;