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/

3 files changed, 50 insertions, 0 deletions

diff --git a/source/blender/nodes/CMakeLists.txt b/source/blender/nodes/CMakeLists.txt
index c637e3606f1..8b2a5ebd263 100644
--- a/source/blender/nodes/CMakeLists.txt
+++ b/source/blender/nodes/CMakeLists.txt
@@ -159,6 +159,7 @@ set(SRC
 	shader/nodes/node_shader_light_path.c
 	shader/nodes/node_shader_light_falloff.c
 	shader/nodes/node_shader_object_info.c
+	shader/nodes/node_shader_particle_info.c
 	shader/nodes/node_shader_mix_shader.c
 	shader/nodes/node_shader_add_shader.c
 	shader/nodes/node_shader_output_lamp.c
diff --git a/source/blender/nodes/NOD_shader.h b/source/blender/nodes/NOD_shader.h
index dd6d25380b4..6b000181953 100644
--- a/source/blender/nodes/NOD_shader.h
+++ b/source/blender/nodes/NOD_shader.h
@@ -78,6 +78,7 @@ void register_node_type_sh_object_info(struct bNodeTreeType *ttype);
 void register_node_type_sh_fresnel(struct bNodeTreeType *ttype);
 void register_node_type_sh_layer_weight(struct bNodeTreeType *ttype);
 void register_node_type_sh_tex_coord(struct bNodeTreeType *ttype);
+void register_node_type_sh_particle_info(struct bNodeTreeType *ttype);
 
 void register_node_type_sh_background(struct bNodeTreeType *ttype);
 void register_node_type_sh_bsdf_diffuse(struct bNodeTreeType *ttype);
diff --git a/source/blender/nodes/shader/nodes/node_shader_particle_info.c b/source/blender/nodes/shader/nodes/node_shader_particle_info.c
new file mode 100644
index 00000000000..6456742e22b
--- /dev/null
+++ b/source/blender/nodes/shader/nodes/node_shader_particle_info.c
@@ -0,0 +1,48 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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.
+ *
+ * The Original Code is Copyright (C) 2005 Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#include "../node_shader_util.h"
+
+static bNodeSocketTemplate outputs[] = {
+        { SOCK_FLOAT,  0, "Age" },
+        { SOCK_FLOAT,  0, "Lifetime" },
+        { -1, 0, "" }
+};
+
+/* node type definition */
+void register_node_type_sh_particle_info(bNodeTreeType *ttype)
+{
+        static bNodeType ntype;
+
+        node_type_base(ttype, &ntype, SH_NODE_PARTICLE_INFO, "Particle Info", NODE_CLASS_INPUT, 0);
+        node_type_compatibility(&ntype, NODE_NEW_SHADING);
+        node_type_socket_templates(&ntype, NULL, outputs);
+        node_type_size(&ntype, 150, 60, 200);
+
+        nodeRegisterType(ttype, &ntype);
+}
+