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Cycles / Ray Depth:

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* Added a Ray Depth output to the Light Path node, which gives the user access to the current bounce.
This can be used to limit the maximum ray bounce on a per shader basis. Another use case is to restrict light influence with this, to have a lamp only contribute to the direct lighting. 

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

This is part of my GSoC 2013 project. SVN merge of r58091 and r58772 from soc-2013-dingto.
This commit is contained in:
Thomas Dinges
2013-07-31 20:30:37 +00:00
parent c15ae082bb
commit 3840e0b234
12 changed files with 62 additions and 31 deletions
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7
intern/cycles/render/nodes.cpp
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@@ -2064,6 +2064,7 @@ LightPathNode::LightPathNode()
add_output("Is Reflection Ray", SHADER_SOCKET_FLOAT);
add_output("Is Transmission Ray", SHADER_SOCKET_FLOAT);
add_output("Ray Length", SHADER_SOCKET_FLOAT);
add_output("Ray Depth", SHADER_SOCKET_FLOAT);
}
void LightPathNode::compile(SVMCompiler& compiler)
@@ -2118,6 +2119,12 @@ void LightPathNode::compile(SVMCompiler& compiler)
compiler.stack_assign(out);
compiler.add_node(NODE_LIGHT_PATH, NODE_LP_ray_length, out->stack_offset);
}
out = output("Ray Depth");
if(!out->links.empty()) {
compiler.stack_assign(out);
compiler.add_node(NODE_LIGHT_PATH, NODE_LP_ray_depth, out->stack_offset);
}
}