Cycles: add Object Info node, with outputs object location, object/material

pass index, and a random number unique to the instance of the object.

This can be useful to give some variation to a single material assigned to
multiple instances, either manually controlled through the object index, based
on the object location, or randomized for each instance. 

http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Object_Info	

3 files changed, 63 insertions, 0 deletions

diff --git a/source/blender/nodes/CMakeLists.txt b/source/blender/nodes/CMakeLists.txt
index 772ce376cb8..f7e0fd57ff6 100644
--- a/source/blender/nodes/CMakeLists.txt
+++ b/source/blender/nodes/CMakeLists.txt
@@ -158,6 +158,7 @@ set(SRC
 	shader/nodes/node_shader_volume_isotropic.c
 	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_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 3d93f41cfe5..dd6d25380b4 100644
--- a/source/blender/nodes/NOD_shader.h
+++ b/source/blender/nodes/NOD_shader.h
@@ -74,6 +74,7 @@ void register_node_type_sh_attribute(struct bNodeTreeType *ttype);
 void register_node_type_sh_geometry(struct bNodeTreeType *ttype);
 void register_node_type_sh_light_path(struct bNodeTreeType *ttype);
 void register_node_type_sh_light_falloff(struct bNodeTreeType *ttype);
+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);
diff --git a/source/blender/nodes/shader/nodes/node_shader_object_info.c b/source/blender/nodes/shader/nodes/node_shader_object_info.c
new file mode 100644
index 00000000000..ee356dbb3b3
--- /dev/null
+++ b/source/blender/nodes/shader/nodes/node_shader_object_info.c
@@ -0,0 +1,61 @@
+/*
+ * ***** 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"
+
+/* **************** OUTPUT ******************** */
+
+static bNodeSocketTemplate sh_node_object_info_out[]= {
+	{	SOCK_VECTOR, 0, "Location",			0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
+	{	SOCK_FLOAT,  0, "Object Index",		0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
+	{	SOCK_FLOAT,  0, "Material Index",	0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
+	{	SOCK_FLOAT,  0, "Random",			0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
+	{	-1, 0, ""	}
+};
+
+static int node_shader_gpu_object_info(GPUMaterial *mat, bNode *UNUSED(node), GPUNodeStack *in, GPUNodeStack *out)
+{
+	return GPU_stack_link(mat, "node_object_info", in, out);
+}
+
+/* node type definition */
+void register_node_type_sh_object_info(bNodeTreeType *ttype)
+{
+	static bNodeType ntype;
+
+	node_type_base(ttype, &ntype, SH_NODE_OBJECT_INFO, "Object Info", NODE_CLASS_INPUT, 0);
+	node_type_compatibility(&ntype, NODE_NEW_SHADING);
+	node_type_socket_templates(&ntype, NULL, sh_node_object_info_out);
+	node_type_size(&ntype, 150, 60, 200);
+	node_type_init(&ntype, NULL);
+	node_type_storage(&ntype, "", NULL, NULL);
+	node_type_exec(&ntype, NULL);
+	node_type_gpu(&ntype, node_shader_gpu_object_info);
+
+	nodeRegisterType(ttype, &ntype);
+}
+