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Cycles: Add OSL metadata for default geometry attributes

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Add support for OSL parameter metadata named `defaultgeomprop`, whose
values are interpreted the same way as the property on MaterialX node
inputs. When set to `Tworld` the tangent is then automatically linked
to the shader and generated for the mesh.

Pull Request: https://projects.blender.org/blender/cycles/pulls/25
This commit is contained in:
Alex Fuller
2025-03-26 21:16:37 +01:00
committed by Brecht Van Lommel
parent 47e1b24c29
commit 438ac2a653
1 changed files with 23 additions and 0 deletions
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23
intern/cycles/scene/osl.cpp
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@@ -778,6 +778,29 @@ OSLNode *OSLShaderManager::osl_node(ShaderGraph *graph,
if (metadata.name == "widget" && metadata.sdefault[0] == "null") {
socket_flags |= SocketType::LINK_OSL_INITIALIZER;
}
else if (metadata.name == "defaultgeomprop") {
/* the following match up to MaterialX default geometry properties
* that we use to help set socket flags to the corresponding
* geometry link equivalents. */
if (metadata.sdefault[0] == "Nobject") {
socket_flags |= SocketType::LINK_TEXTURE_NORMAL;
}
else if (metadata.sdefault[0] == "Nworld") {
socket_flags |= SocketType::LINK_NORMAL;
}
else if (metadata.sdefault[0] == "Pobject") {
socket_flags |= SocketType::LINK_TEXTURE_GENERATED;
}
else if (metadata.sdefault[0] == "Pworld") {
socket_flags |= SocketType::LINK_POSITION;
}
else if (metadata.sdefault[0] == "Tworld") {
socket_flags |= SocketType::LINK_TANGENT;
}
else if (metadata.sdefault[0] == "UV0") {
socket_flags |= SocketType::LINK_TEXTURE_UV;
}
}
}
}