Cycles / Wireframe node:

* Added a wireframe node (Input category) to get access to Mesh wireframe data. 
The thickness can be controlled via a "Size" parameter, and is available in world units (default) and screen pixel size. 
* Only the triangulated mesh is available now, quads is for later. 

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

Render and Example file:
http://www.pasteall.org/pic/show.php?id=51731
http://www.pasteall.org/blend/21510

1 files changed, 27 insertions, 0 deletions

diff --git a/intern/cycles/render/nodes.cpp b/intern/cycles/render/nodes.cpp
index 06322fec820..4d9fc356d80 100644
--- a/intern/cycles/render/nodes.cpp
+++ b/intern/cycles/render/nodes.cpp
@@ -2891,6 +2891,33 @@ void LayerWeightNode::compile(OSLCompiler& compiler)
 	compiler.add(this, "node_layer_weight");
 }
 
+/* Wireframe */
+
+WireframeNode::WireframeNode()
+: ShaderNode("Wireframe")
+{
+	add_input("Size", SHADER_SOCKET_FLOAT, 0.01f);
+	add_output("Fac", SHADER_SOCKET_FLOAT);
+	
+	use_pixel_size = false;
+}
+
+void WireframeNode::compile(SVMCompiler& compiler)
+{
+	ShaderInput *size_in = input("Size");
+	ShaderOutput *fac_out = output("Fac");
+
+	compiler.stack_assign(size_in);
+	compiler.stack_assign(fac_out);
+	compiler.add_node(NODE_WIREFRAME, size_in->stack_offset, fac_out->stack_offset, use_pixel_size);
+}
+
+void WireframeNode::compile(OSLCompiler& compiler)
+{
+	compiler.parameter("use_pixel_size", use_pixel_size);
+	compiler.add(this, "node_wireframe");
+}
+
 /* Output */
 
 OutputNode::OutputNode()