Expose hardcoded UDIM transform names. Currently for atlas lookup but (…

…#1274) can be used for array lookup as well.
autodesk-forks · Jul 19, 2021 · 5c66311 · 5c66311
1 parent d9420ea
commit 5c66311
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/source/MaterialXGenShader/Nodes/HwImageNode.cpp b/source/MaterialXGenShader/Nodes/HwImageNode.cpp
@@ -13,8 +13,8 @@
 namespace MaterialX
 {
 // Additional implementaton arguments for image nodes
-const string UV_SCALE = "uv_scale";
-const string UV_OFFSET = "uv_offset";
+string HwImageNode::UV_SCALE = "uv_scale";
+string HwImageNode::UV_OFFSET = "uv_offset";
 
 ShaderNodeImplPtr HwImageNode::create()
 {

diff --git a/source/MaterialXGenShader/Nodes/HwImageNode.h b/source/MaterialXGenShader/Nodes/HwImageNode.h
@@ -19,6 +19,12 @@ class MX_GENSHADER_API HwImageNode : public HwSourceCodeNode
 
     void addInputs(ShaderNode& node, GenContext& context) const override;
     void setValues(const Node& node, ShaderNode& shaderNode, GenContext& context) const override;
+
+    // Aguments which may be added as part of the signature for image nodes
+    // to allow for additional texture coordinate transformations.
+    // Currently these are added to support UDIM texture atlas lookup.
+    static string UV_SCALE;
+    static string UV_OFFSET;
 };
 
 } // namespace MaterialX