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

@@ -49,7 +49,7 @@ NodeItem BSDFPrincipledNodeParser::compute()
   /* Creating standard_surface */
   NodeItem res = create_node("standard_surface", "surfaceshader");
   res.set_input("base", 1.0, "float");
-  res.set_input("base_color", base_color.to_color3());
+  res.set_input("base_color", base_color, NodeItem::Type::Color3);
   res.set_input("diffuse_roughness", roughness);
   if (normal) {
     res.set_input("normal", normal);
@@ -60,27 +60,27 @@ NodeItem BSDFPrincipledNodeParser::compute()
   res.set_input("metalness", metallic);
 
   res.set_input("specular", specular);
-  res.set_input("specular_color", base_color.to_color3());
+  res.set_input("specular_color", base_color, NodeItem::Type::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);
 
   res.set_input("transmission", transmission);
-  res.set_input("transmission_color", base_color.to_color3());
+  res.set_input("transmission_color", base_color, NodeItem::Type::Color3);
   res.set_input("transmission_extra_roughness", roughness);
 
   res.set_input("subsurface", subsurface);
-  res.set_input("subsurface_color", subsurface_color.to_color3());
+  res.set_input("subsurface_color", subsurface_color, NodeItem::Type::Color3);
-  res.set_input("subsurface_radius", subsurface_radius);
+  res.set_input("subsurface_radius", subsurface_radius, NodeItem::Type::Color3);
   res.set_input("subsurface_anisotropy", anisotropic);
 
   res.set_input("sheen", sheen);
-  res.set_input("sheen_color", base_color.to_color3());
+  res.set_input("sheen_color", base_color, NodeItem::Type::Color3);
   res.set_input("sheen_roughness", roughness);
 
   res.set_input("coat", clearcoat);
-  res.set_input("coat_color", base_color.to_color3());
+  res.set_input("coat_color", base_color, NodeItem::Type::Color3);
   res.set_input("coat_roughness", clearcoat_roughness);
   res.set_input("coat_IOR", ior);
   res.set_input("coat_anisotropy", anisotropic);
@@ -90,7 +90,7 @@ NodeItem BSDFPrincipledNodeParser::compute()
   }
 
   res.set_input("emission", emission_strength);
-  res.set_input("emission_color", emission.to_color3());
+  res.set_input("emission_color", emission, NodeItem::Type::Color3);
 
   return res;
 }

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

@@ -24,7 +24,7 @@ NodeItem HueSatValNodeParser::compute()
   combine.set_input("in3", val);
 
   NodeItem res = create_node("hsvadjust", "color3");
-  res.set_input("in", color.to_color3());
+  res.set_input("in", color, NodeItem::Type::Color3);
   res.set_input("amount", combine);
   return res;
 }

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

@@ -2,8 +2,8 @@
  *
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
-#include "node_parser.h"
 #include "../material.h"
+#include "node_parser.h"
 
 namespace blender::nodes::materialx {
 
@@ -109,10 +109,10 @@ NodeItem MathNodeParser::compute()
           res = x.max(y);
           break;
         case NODE_MATH_LESS_THAN:
-          res = x.if_else("<", y, value(1.0f), value(0.0f));
+          res = x.if_else(NodeItem::CompareOp::Less, y, value(1.0f), value(0.0f));
           break;
         case NODE_MATH_GREATER_THAN:
-          res = x.if_else(">", y, value(1.0f), value(0.0f));
+          res = x.if_else(NodeItem::CompareOp::Greater, y, value(1.0f), value(0.0f));
           break;
         case NODE_MATH_MODULO:
           res = x % y;
@@ -138,7 +138,7 @@ NodeItem MathNodeParser::compute()
               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));
+              res = z.if_else(NodeItem::CompareOp::Less, (x - y).abs(), value(1.0f), value(0.0f));
               break;
             case NODE_MATH_MULTIPLY_ADD:
               res = x * y + z;

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

@@ -9,6 +9,21 @@
 namespace blender::nodes::materialx {
 
 class NodeItem {
+ public:
+  enum class Type {
+    Empty = 0,
+    Other, /* For MaterialX types like: surfaceshader, bsdf, edf, ...*/
+    String,
+    Integer,
+    Float,
+    Vector2,
+    Vector3,
+    Vector4,
+    Color3,
+    Color4
+  };
+  enum class CompareOp { Less = 0, LessEq, Eq, GreaterEq, Greater, NotEq };
+
  public:
   MaterialX::ValuePtr value;
   MaterialX::NodePtr node;
@@ -20,20 +35,7 @@ class NodeItem {
   NodeItem(MaterialX::GraphElement *graph);
   ~NodeItem() = default;
 
-  NodeItem empty() const;
+  /* Operators */
-  template<class T> NodeItem val(const T &data) const;
-
-  template<class T>
-  void set_input(const std::string &name, const T &value, const std::string &mx_type);
-  void set_input(const std::string &name,
-                 const NodeItem &item,
-                 const std::string &output_name = "");
-  void set_input(const std::string &name, const MaterialX::ValuePtr value);
-  void set_input(const std::string &name,
-                 const MaterialX::NodePtr node,
-                 const std::string &output_name = "");
-  void add_output(const std::string &name, const std::string &mx_type);
-
   operator bool() const;
   NodeItem operator+(const NodeItem &other) const;
   NodeItem operator-(const NodeItem &other) const;
@@ -45,16 +47,13 @@ class NodeItem {
   bool operator==(const NodeItem &other) const;
   bool operator!=(const NodeItem &other) const;
 
+  /* Math functions */
   NodeItem abs() const;
   NodeItem floor() const;
   NodeItem ceil() const;
   NodeItem min(const NodeItem &other) const;
   NodeItem max(const NodeItem &other) const;
   NodeItem dotproduct(const NodeItem &other) const;
-  NodeItem if_else(const std::string &condition,
-                   const NodeItem &other,
-                   const NodeItem &if_val,
-                   const NodeItem &else_val) const;
   NodeItem blend(const NodeItem &a, const NodeItem &b) const;
   NodeItem clamp(const NodeItem &min_val, const NodeItem &max_val) const;
   NodeItem clamp(float min_val = 0.0f, float max_val = 1.0f) const;
@@ -72,25 +71,42 @@ class NodeItem {
   NodeItem sqrt() const;
   NodeItem sign() const;
   NodeItem exp() const;
-  NodeItem separate(const int index) const;
+  NodeItem convert(Type to_type) const;
+  NodeItem if_else(CompareOp op,
+                   const NodeItem &other,
+                   const NodeItem &if_val,
+                   const NodeItem &else_val) const;
+  NodeItem extract(const int index) const;
   NodeItem separate_color(const int index) const;
 
-  NodeItem to_color3() const;
+  /* Useful functions */
-  NodeItem to_vector3() const;
+  NodeItem empty() const;
-  bool is_numeric() const;
+  template<class T> NodeItem val(const T &data) const;
-  std::string type() const;
+  Type type() const;
+
+  /* Functions to set input and output */
+  template<class T>
+  void set_input(const std::string &in_name, const T &value, const std::string &in_type);
+  void set_input(const std::string &in_name,
+                 const NodeItem &item,
+                 const std::string &out_name = "");
+  void set_input(const std::string &in_name,
+                 const NodeItem &item,
+                 Type in_type,
+                 const std::string &out_name = "");
+  void add_output(const std::string &in_name, Type out_type);
 
  private:
-  NodeItem arithmetic(const std::string &mx_category, std::function<float(float)> func) const;
+  static Type type(const std::string &type_str);
+  static std::string type(Type type);
+  static bool is_arithmetic(Type type);
+  static Type adjust_types(NodeItem &item1, NodeItem &item2);
+
+  bool is_arithmetic() const;
+  NodeItem arithmetic(const std::string &category, std::function<float(float)> func) const;
   NodeItem arithmetic(const NodeItem &other,
-                      const std::string &mx_category,
+                      const std::string &category,
                       std::function<float(float, float)> func) const;
-  static MaterialX::ValuePtr float_to_type(float v, std::string mx_type);
-  /* Functions for adjusting values to make equal types  */
-  static bool adjust_types(MaterialX::ValuePtr &val1,
-                           MaterialX::ValuePtr &val2,
-                           std::string &mx_type);
-  static bool adjust_types(NodeItem &val1, NodeItem &val2, std::string &mx_type);
 };
 
 template<class T> NodeItem NodeItem::val(const T &data) const
@@ -101,9 +117,9 @@ template<class T> NodeItem NodeItem::val(const T &data) const
 }
 
 template<class T>
-void NodeItem::set_input(const std::string &name, const T &value, const std::string &mx_type)
+void NodeItem::set_input(const std::string &in_name, const T &value, const std::string &in_type)
 {
-  node->setInputValue(name, value, mx_type);
+  node->setInputValue(in_name, value, in_type);
 }
 
 }  // namespace blender::nodes::materialx

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

@@ -14,7 +14,11 @@ NodeParser::NodeParser(MaterialX::GraphElement *graph,
                        const Material *material,
                        const bNode *node,
                        const bNodeSocket *socket_out)
-    : graph_(graph), depsgraph_(depsgraph), material_(material), node_(node), socket_out_(socket_out)
+    : graph_(graph),
+      depsgraph_(depsgraph),
+      material_(material),
+      node_(node),
+      socket_out_(socket_out)
 {
 }
 
@@ -74,17 +78,20 @@ NodeItem NodeParser::get_input_default(const bNodeSocket &socket)
     case SOCK_FLOAT: {
       float v = socket.default_value_typed<bNodeSocketValueFloat>()->value;
       res.value = MaterialX::Value::createValue<float>(v);
-    } break;
+      break;
+    }
     case SOCK_VECTOR: {
       const float *v = socket.default_value_typed<bNodeSocketValueVector>()->value;
       res.value = MaterialX::Value::createValue<MaterialX::Vector3>(
           MaterialX::Vector3(v[0], v[1], v[2]));
-    } break;
+      break;
+    }
     case SOCK_RGBA: {
       const float *v = socket.default_value_typed<bNodeSocketValueRGBA>()->value;
       res.value = MaterialX::Value::createValue<MaterialX::Color4>(
           MaterialX::Color4(v[0], v[1], v[2], v[3]));
-    } break;
+      break;
+    }
     default: {
       CLOG_WARN(LOG_MATERIALX_SHADER, "Unsupported socket type: %d", socket.type);
     }

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

@@ -15,7 +15,7 @@ NodeItem NormalMapNodeParser::compute()
   NodeItem strength = get_input_value("Strength");
 
   NodeItem res = create_node("normalmap", "vector3");
-  res.set_input("in", color.to_vector3());
+  res.set_input("in", color, NodeItem::Type::Color3);
   res.set_input("scale", strength);
 
   switch (normal_map_node->space) {

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

@@ -37,7 +37,8 @@ NodeItem OutputMaterialNodeParser::compute(const std::string &socket_name)
 NodeItem OutputMaterialNodeParser::compute_default()
 {
   NodeItem surface = create_node("standard_surface", "surfaceshader");
-  surface.set_input("base_color", value(MaterialX::Color3(material_->r, material_->g, material_->b)));
+  surface.set_input("base_color",
+                    value(MaterialX::Color3(material_->r, material_->g, material_->b)));
   surface.set_input("diffuse_roughness", value(material_->roughness));
   if (material_->metallic > 0.0f) {
     surface.set_input("metalness", value(material_->metallic));

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

@@ -25,7 +25,7 @@ NodeItem SeparateColorNodeParser::compute()
       channel_1 = "Hue";
       channel_2 = "Saturation";
       convert = create_node("rgbtohsv", "color3");
-      convert.set_input("in", color.to_color3());
+      convert.set_input("in", color, NodeItem::Type::Color3);
       break;
     default:
       BLI_assert_unreachable();
@@ -36,12 +36,13 @@ NodeItem SeparateColorNodeParser::compute()
                                                     2;
 
   NodeItem res = convert ? convert : color;
-  return res.separate(index);
+  return res.extract(index);
 }
 
 NodeItem CombineColorNodeParser::compute()
 {
   /* TODO: implement. */
+  return empty();
 }
 
 }  // namespace blender::nodes::materialx

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

@@ -10,7 +10,7 @@ NodeItem SeparateXYZNodeParser::compute()
 {
   NodeItem vector = get_input_value("Vector");
   int index = STREQ(socket_out_->name, "X") ? 0 : STREQ(socket_out_->name, "Y") ? 1 : 2;
-  return vector.separate(index);
+  return vector.extract(index);
 }
 
 NodeItem CombineXYZNodeParser::compute()

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

@@ -8,23 +8,20 @@ namespace blender::nodes::materialx {
 
 NodeItem TexCheckerNodeParser::compute()
 {
-  NodeItem scale = get_input_value("Scale");
+  NodeItem vector = get_input_link("Vector");
   NodeItem color1 = get_input_value("Color1");
   NodeItem color2 = get_input_value("Color2");
+  NodeItem scale = get_input_value("Scale");
 
-  if (scale.value && scale.type() == "float") {
+  if (!vector) {
-    float v = scale.value->asA<float>();
+    vector = create_node("texcoord", "vector2");
-    scale = value(MaterialX::Vector2(v, v));
   }
-
+  vector = vector * scale;
-  NodeItem texcoord = create_node("texcoord", "vector2");
-  NodeItem place2d = create_node("place2d", "vector2");
-  place2d.set_input("texcoord", texcoord * scale);
 
   NodeItem separate = create_node("separate2", "multioutput");
-  separate.set_input("in", place2d);
+  separate.set_input("in", vector, NodeItem::Type::Vector2);
-  separate.add_output("outx", "float");
+  separate.add_output("outx", NodeItem::Type::Float);
-  separate.add_output("outy", "float");
+  separate.add_output("outy", NodeItem::Type::Float);
 
   NodeItem modulo_x = create_node("modulo", "float");
   modulo_x.set_input("in1", separate, "outx");
@@ -34,12 +31,12 @@ NodeItem TexCheckerNodeParser::compute()
   modulo_y.set_input("in1", separate, "outy");
   modulo_y.set_input("in2", value(2.0f));
 
-  NodeItem ifequal =
+  NodeItem ifequal = (modulo_x.floor() + modulo_y.floor())
-      (modulo_x.floor() + modulo_y.floor()).if_else("==", value(1.0f), value(0.0f), value(1.0f));
+                         .if_else(NodeItem::CompareOp::Eq, value(1.0f), value(0.0f), value(1.0f));
 
   NodeItem res = create_node("mix", "color3");
-  res.set_input("bg", color1.to_color3());
+  res.set_input("bg", color1, NodeItem::Type::Color3);
-  res.set_input("fg", color2.to_color3());
+  res.set_input("fg", color2, NodeItem::Type::Color3);
   res.set_input("mix", ifequal);
   return res;
 }

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

@@ -12,14 +12,15 @@ NodeItem TexNoiseNodeParser::compute()
   NodeItem detail = get_input_value("Detail");
   NodeItem lacunarity = get_input_value("Lacunarity");
 
-  if (detail.value && detail.type() == "float") {
+  if (detail.value && detail.type() == NodeItem::Type::Float) {
     detail = value(int(detail.value->asA<float>()));
   }
 
-  NodeItem texcoord = create_node("position", "vector3");
+  NodeItem position = create_node("position", "vector3");
+  position = position * scale;
 
   NodeItem res = create_node("fractal3d", "color3");
-  res.set_input("position", texcoord * scale);
+  res.set_input("position", position, NodeItem::Type::Vector3);
   res.set_input("octaves", detail);
   res.set_input("lacunarity", lacunarity);
   return res;