source/blender/makesrna/intern/rna_render.cc

@@ -1010,7 +1010,7 @@ static void rna_def_render_engine(BlenderRNA *brna)
   prop = RNA_def_property(srna, "bl_use_materialx", PROP_BOOLEAN, PROP_NONE);
   RNA_def_property_boolean_sdna(prop, nullptr, "type->flag", RE_USE_MATERIALX);
   RNA_def_property_flag(prop, PROP_REGISTER_OPTIONAL);
-  RNA_def_property_ui_text(prop, "Use Material", "Use MaterialX for exporting materials to Hydra");
+  RNA_def_property_ui_text(prop, "Use MaterialX", "Use MaterialX for exporting materials to Hydra");
 
   RNA_define_verify_sdna(true);
 }

source/blender/nodes/shader/CMakeLists.txt

@@ -24,7 +24,8 @@ set(INC
 if(WITH_HYDRA)
   list(APPEND INC
     ../../io/usd
-  )
+    ../../../../intern/clog
+)
   add_definitions(-DWITH_HYDRA)
 endif()
 
@@ -144,8 +145,6 @@ set(LIB
 )
 
 if(WITH_MATERIALX)
-  list(APPEND LIB MaterialXCore)
-  list(APPEND LIB MaterialXFormat)
   list(APPEND SRC
     materialx/material.cc
     materialx/nodes/bsdf_principled.cc
@@ -164,6 +163,10 @@ if(WITH_MATERIALX)
     materialx/nodes/node_item.h
     materialx/nodes/node_parser.h
   )
+  list(APPEND LIB
+    MaterialXCore
+    MaterialXFormat
+  )
 endif()
 
 if(WITH_FREESTYLE)

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

@@ -5,13 +5,18 @@
 #include "material.h"
 #include "nodes/node_parser.h"
 
-#include <MaterialXCore/Node.h>
 #include <MaterialXFormat/XmlIo.h>
 
+#include "DEG_depsgraph.h"
+
+#include "DNA_material_types.h"
+
 #include "NOD_shader.h"
 
 namespace blender::nodes::materialx {
 
+CLG_LOGREF_DECLARE_GLOBAL(LOG_MATERIALX_SHADER, "materialx.shader");
+
 static void export_nodegraph(MaterialX::GraphElement *graph,
                              Depsgraph *depsgraph,
                              Material *material)
@@ -48,7 +53,7 @@ MaterialX::DocumentPtr export_to_materialx(Depsgraph *depsgraph, Material *mater
     create_standard_surface(doc.get(), material);
   }
   std::string str = MaterialX::writeToXmlString(doc);
-  printf("\nMaterial: %s\n%s\n", material->id.name, str.c_str());
+  CLOG_INFO(LOG_MATERIALX_SHADER, 1, "Material: %s\n%s", material->id.name, str.c_str());
   return doc;
 }
 

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

@@ -6,11 +6,15 @@
 
 #include <MaterialXCore/Document.h>
 
-#include "DEG_depsgraph.h"
-#include "DNA_material_types.h"
+#include "CLG_log.h"
+
+struct Depsgraph;
+struct Material;
 
 namespace blender::nodes::materialx {
 
+extern struct CLG_LogRef *LOG_MATERIALX_SHADER;
+
 MaterialX::DocumentPtr export_to_materialx(Depsgraph *depsgraph, Material *material);
 
 }  // namespace blender::nodes::materialx

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

@@ -72,8 +72,12 @@ NodeItem BSDFPrincipledNodeParser::compute()
   res.set_input("base", 1.0, "float");
   res.set_input("base_color", base_color.to_color3());
   res.set_input("diffuse_roughness", roughness);
-  res.set_input("normal", normal);
-  res.set_input("tangent", tangent);
+  if (normal) {
+    res.set_input("normal", normal);
+  }
+  if (tangent) {
+    res.set_input("tangent", tangent);
+  }
 
   if (metallic != zero) {
     res.set_input("metalness", metallic);
@@ -84,8 +88,10 @@ NodeItem BSDFPrincipledNodeParser::compute()
     res.set_input("specular_color", base_color.to_color3());
     res.set_input("specular_roughness", roughness);
     res.set_input("specular_IOR", ior);
-    res.set_input("specular_anisotropy", anisotropic);
-    res.set_input("specular_rotation", anisotropic_rotation);
+    if (anisotropic) {
+      res.set_input("specular_anisotropy", anisotropic);
+      res.set_input("specular_rotation", anisotropic_rotation);
+    }
   }
 
   if (transmission != zero) {
@@ -98,7 +104,9 @@ NodeItem BSDFPrincipledNodeParser::compute()
     res.set_input("subsurface", subsurface);
     res.set_input("subsurface_color", subsurface_color);
     res.set_input("subsurface_radius", subsurface_radius);
-    res.set_input("subsurface_anisotropy", anisotropic);
+    if (anisotropic) {
+      res.set_input("subsurface_anisotropy", anisotropic);
+    }
   }
 
   if (sheen != zero) {
@@ -112,8 +120,10 @@ NodeItem BSDFPrincipledNodeParser::compute()
     res.set_input("coat_color", base_color.to_color3());
     res.set_input("coat_roughness", clearcoat_roughness);
     res.set_input("coat_IOR", ior);
-    res.set_input("coat_anisotropy", anisotropic);
-    res.set_input("coat_rotation", anisotropic_rotation);
+    if (anisotropic) {
+      res.set_input("coat_anisotropy", anisotropic);
+      res.set_input("coat_rotation", anisotropic_rotation);
+    }
     res.set_input("coat_normal", clearcoat_normal);
   }
 

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

@@ -3,16 +3,14 @@
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
 #include "node_parser.h"
+#include "../material.h"
 
 namespace blender::nodes::materialx {
 
 NodeItem MathNodeParser::compute()
 {
   /* TODO: finish some math operations */
-
   auto op = node->custom1;
-  printf("%d\n", int(op));
-
   NodeItem res = empty();
 
   /* Single operand operations */
@@ -123,13 +121,13 @@ NodeItem MathNodeParser::compute()
           res = x.atan2(y);
           break;
         case NODE_MATH_SNAP:
-          // res = ;
+          CLOG_WARN(LOG_MATERIALX_SHADER, "Unimplemented math operation %d", op);
           break;
         case NODE_MATH_PINGPONG:
-          // res = ;
+          CLOG_WARN(LOG_MATERIALX_SHADER, "Unimplemented math operation %d", op);
           break;
         case NODE_MATH_FLOORED_MODULO:
-          // res = ;
+          CLOG_WARN(LOG_MATERIALX_SHADER, "Unimplemented math operation %d", op);
           break;
 
         default: {
@@ -137,7 +135,7 @@ NodeItem MathNodeParser::compute()
           NodeItem z = get_input_value(2);
           switch (op) {
             case NODE_MATH_WRAP:
-              // res = ;
+              CLOG_WARN(LOG_MATERIALX_SHADER, "Unimplemented math operation %d", op);
               break;
             case NODE_MATH_COMPARE:
               res = z.if_else("<", (x - y).abs(), value(1.0f), value(0.0f));
@@ -146,10 +144,10 @@ NodeItem MathNodeParser::compute()
               res = x * y + z;
               break;
             case NODE_MATH_SMOOTH_MIN:
-              // res = ;
+              CLOG_WARN(LOG_MATERIALX_SHADER, "Unimplemented math operation %d", op);
               break;
             case NODE_MATH_SMOOTH_MAX:
-              // res = ;
+              CLOG_WARN(LOG_MATERIALX_SHADER, "Unimplemented math operation %d", op);
               break;
 
             default:

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

@@ -3,6 +3,7 @@
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
 #include "node_item.h"
+#include "../material.h"
 
 #include "BLI_assert.h"
 #include "BLI_utildefines.h"
@@ -26,6 +27,9 @@ void NodeItem::set_input(const std::string &name,
   else if (item.node) {
     set_input(name, item.node, output_name);
   }
+  else {
+    CLOG_WARN(LOG_MATERIALX_SHADER, "Empty item to input: %s", name.c_str());
+  }
 }
 
 void NodeItem::set_input(const std::string &name, const MaterialX::ValuePtr value)
@@ -218,6 +222,9 @@ NodeItem NodeItem::dotproduct(const NodeItem &other) const
       auto v = value->asA<MaterialX::Vector4>();
       f = v[0] + v[1] + v[2] + v[3];
     }
+    else {
+      BLI_assert_unreachable();
+    }
     d.value = MaterialX::Value::createValue(f);
   }
   return d;
@@ -369,27 +376,27 @@ NodeItem NodeItem::exp() const
 
 NodeItem NodeItem::to_color3() const
 {
-  std::string t = type();
+  std::string mx_type = type();
   NodeItem res = empty();
   if (value) {
     MaterialX::Color3 c;
-    if (t == "float") {
+    if (mx_type == "float") {
       float v = value->asA<float>();
       c = {v, v, v};
     }
-    else if (t == "color3") {
+    else if (mx_type == "color3") {
       auto v = value->asA<MaterialX::Color3>();
       c = {v[0], v[1], v[2]};
     }
-    else if (t == "color4") {
+    else if (mx_type == "color4") {
       auto v = value->asA<MaterialX::Color4>();
       c = {v[0], v[1], v[2]};
     }
-    else if (t == "vector3") {
+    else if (mx_type == "vector3") {
       auto v = value->asA<MaterialX::Vector3>();
       c = {v[0], v[1], v[2]};
     }
-    else if (t == "vector4") {
+    else if (mx_type == "vector4") {
       auto v = value->asA<MaterialX::Vector4>();
       c = {v[0], v[1], v[2]};
     }
@@ -399,7 +406,7 @@ NodeItem NodeItem::to_color3() const
     res.value = MaterialX::Value::createValue<MaterialX::Color3>(c);
   }
   else if (node) {
-    if (t != "color3") {
+    if (mx_type != "color3") {
       return res;
     }
     res.node = node;

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

@@ -3,8 +3,9 @@
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
 #include "node_parser.h"
+#include "../material.h"
 
-#include <BKE_node_runtime.hh>
+#include "BKE_node_runtime.hh"
 
 namespace blender::nodes::materialx {
 
@@ -82,7 +83,7 @@ NodeItem NodeParser::get_input_default(const bNodeSocket &socket)
           MaterialX::Color4(v[0], v[1], v[2], v[3]));
     } break;
     default: {
-      // TODO log warn
+      CLOG_WARN(LOG_MATERIALX_SHADER, "Unsupported socket type: %d", socket.type);
     }
   }
   return res;
@@ -136,7 +137,7 @@ NodeItem NodeParser::get_input_link(const bNodeSocket &socket)
       parser = std::make_unique<TexCheckerNodeParser>(graph, depsgraph, material, in_node);
       break;
     default:
-      // TODO: warning log
+      CLOG_WARN(LOG_MATERIALX_SHADER, "Unsupported node: %s (%d)", in_node->name, in_node->type);
       return res;
   }