source/blender/nodes/shader/CMakeLists.txt

@@ -149,15 +149,15 @@ if(WITH_MATERIALX)
   list(APPEND SRC
     materialx/material.cc
     materialx/nodes/bsdf_principled.cc
+    materialx/nodes/invert.cc
+    materialx/nodes/math.cc
+    materialx/nodes/mix_rgb.cc
     materialx/nodes/node_parser.cc
     materialx/nodes/output_material.cc
     materialx/nodes/tex_image.cc
 
     materialx/material.h
-    materialx/nodes/bsdf_principled.h
     materialx/nodes/node_parser.h
-    materialx/nodes/output_material.h
-    materialx/nodes/tex_image.h
   )
 endif()
 

source/blender/nodes/shader/materialx/material.cc

@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
 #include "material.h"
-#include "nodes/output_material.h"
+#include "nodes/node_parser.h"
 
 #include <MaterialXCore/Node.h>
 #include <MaterialXFormat/XmlIo.h>

source/blender/nodes/shader/materialx/nodes/bsdf_principled.cc

@@ -2,9 +2,7 @@
  *
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
-#include "bsdf_principled.h"
-
-#include <BKE_node_runtime.hh>
+#include "node_parser.h"
 
 namespace blender::nodes::materialx {
 

source/blender/nodes/shader/materialx/nodes/invert.cc

@@ -2,16 +2,15 @@
  *
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
-#pragma once
-
 #include "node_parser.h"
 
 namespace blender::nodes::materialx {
 
-class OutputMaterialNodeParser : public NodeParser {
- public:
-  using NodeParser::NodeParser;
-  NodeItem compute() override;
-};
+NodeItem InvertNodeParser::compute()
+{
+  NodeItem fac = get_input_value("Fac");
+  NodeItem color = get_input_value("Color");
+  return fac.blend(color, fac.one() - color);
+}
 
 }  // namespace blender::nodes::materialx

source/blender/nodes/shader/materialx/nodes/math.cc

@@ -2,16 +2,13 @@
  *
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
-#pragma once
-
 #include "node_parser.h"
 
 namespace blender::nodes::materialx {
 
-class TexImageNodeParser : public NodeParser {
- public:
-  using NodeParser::NodeParser;
-  NodeItem compute() override;
-};
+NodeItem MathNodeParser::compute()
+{
+  return empty_value();
+}
 
 }  // namespace blender::nodes::materialx

source/blender/nodes/shader/materialx/nodes/mix_rgb.cc

@@ -2,16 +2,13 @@
  *
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
-#pragma once
-
 #include "node_parser.h"
 
 namespace blender::nodes::materialx {
 
-class BSDFPrincipledNodeParser : public NodeParser {
- public:
-  using NodeParser::NodeParser;
-  NodeItem compute() override;
-};
+NodeItem MixRGBNodeParser::compute()
+{
+  return empty_value();
+}
 
 }  // namespace blender::nodes::materialx

source/blender/nodes/shader/materialx/nodes/node_parser.cc

@@ -4,9 +4,6 @@
 
 #include "node_parser.h"
 
-#include "bsdf_principled.h"
-#include "tex_image.h"
-
 #include <BKE_node_runtime.hh>
 
 namespace blender::nodes::materialx {
@@ -82,6 +79,21 @@ NodeItem NodeItem::operator/(const NodeItem &other)
   return arithmetic(other, "divide", [](float a, float b) { return b == 0.0f ? 0.0f : a / b; });
 }
 
+NodeItem NodeItem::min(const NodeItem &other)
+{
+  return arithmetic(other, "min", [](float a, float b) { return std::min(a, b); });
+}
+
+NodeItem NodeItem::max(const NodeItem &other)
+{
+  return arithmetic(other, "max", [](float a, float b) { return std::max(a, b); });
+}
+
+NodeItem NodeItem::blend(const NodeItem &a, const NodeItem &b)
+{
+  return *this * a + (one() - *this) * b;
+}
+
 NodeItem NodeItem::to_color3() const
 {
   NodeItem res(graph_);
@@ -119,6 +131,13 @@ NodeItem NodeItem::to_color3() const
   return res;
 }
 
+NodeItem NodeItem::one() const
+{
+  NodeItem res(graph_);
+  res = 1.0f;
+  return res;
+}
+
 NodeItem NodeItem::arithmetic(const std::string &mx_category, std::function<float(float)> func)
 {
   std::string t = value ? value->getTypeString() : node->getType();
@@ -297,6 +316,15 @@ NodeItem NodeParser::get_input_link(const std::string &name)
     case SH_NODE_BSDF_PRINCIPLED:
       parser = std::make_unique<BSDFPrincipledNodeParser>(graph, depsgraph, material, in_node);
       break;
+    case SH_NODE_INVERT:
+      parser = std::make_unique<InvertNodeParser>(graph, depsgraph, material, in_node);
+      break;
+    case SH_NODE_MATH:
+      parser = std::make_unique<MathNodeParser>(graph, depsgraph, material, in_node);
+      break;
+    case SH_NODE_MIX_RGB_LEGACY:
+      parser = std::make_unique<MixRGBNodeParser>(graph, depsgraph, material, in_node);
+      break;
     case SH_NODE_TEX_IMAGE:
       parser = std::make_unique<TexImageNodeParser>(graph, depsgraph, material, in_node);
       break;

source/blender/nodes/shader/materialx/nodes/node_parser.h

@@ -37,7 +37,12 @@ class NodeItem {
   NodeItem operator*(const NodeItem &other);
   NodeItem operator/(const NodeItem &other);
 
+  NodeItem min(const NodeItem &other);
+  NodeItem max(const NodeItem &other);
+  NodeItem blend(const NodeItem &a, const NodeItem &b);
+
   NodeItem to_color3() const;
+  NodeItem one() const;
 
  private:
   NodeItem arithmetic(const std::string &mx_category, std::function<float(float)> func);
@@ -85,4 +90,18 @@ class NodeParser {
   NodeItem empty_value();
 };
 
+#define DECLARE_PARSER(T) \
+class T : public NodeParser { \
+ public: \
+  using NodeParser::NodeParser; \
+  NodeItem compute() override; \
+};
+
+DECLARE_PARSER(BSDFPrincipledNodeParser)
+DECLARE_PARSER(InvertNodeParser)
+DECLARE_PARSER(MathNodeParser)
+DECLARE_PARSER(MixRGBNodeParser)
+DECLARE_PARSER(OutputMaterialNodeParser)
+DECLARE_PARSER(TexImageNodeParser)
+
 }  // namespace blender::nodes::materialx

source/blender/nodes/shader/materialx/nodes/output_material.cc

@@ -2,7 +2,7 @@
  *
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
-#include "output_material.h"
+#include "node_parser.h"
 
 namespace blender::nodes::materialx {
 

source/blender/nodes/shader/materialx/nodes/tex_image.cc

@@ -2,7 +2,6 @@
  *
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
-#include "tex_image.h"
 #include "node_parser.h"
 
 #include "hydra/image.h"