source/blender/nodes/shader/CMakeLists.txt

@@ -158,6 +158,7 @@ if(WITH_MATERIALX)
     materialx/nodes/tex_environment.cc
     materialx/nodes/tex_noise.cc
     materialx/nodes/tex_checker.cc
+    materialx/nodes/hueSatVal.cc
 
     materialx/material.h
     materialx/nodes/node_item.h

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

@@ -0,0 +1,32 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include "node_parser.h"
+
+namespace blender::nodes::materialx {
+
+NodeItem HueSatValNodeParser::compute()
+{
+  /* TODO: implement fac, see do_hue_sat_fac in source\blender\nodes\texture\nodes\node_texture_hueSatVal.cc */
+  NodeItem hue = get_input_value("Hue");
+  NodeItem saturation = get_input_value("Saturation");
+  NodeItem val = get_input_value("Value");
+  NodeItem fac = get_input_value("Fac");
+  NodeItem color = get_input_value("Color");
+
+  /* Modifier to follow Cycles result */
+  hue = hue - value(0.5f);
+
+  NodeItem combine = create_node("combine3", "vector3");
+  combine.set_input("in1", hue);
+  combine.set_input("in2", saturation);
+  combine.set_input("in3", val);
+
+  NodeItem res = create_node("hsvadjust", "color3", false);
+  res.set_input("in", color.to_color3());
+  res.set_input("amount", combine);
+  return res;
+}
+
+}  // namespace blender::nodes::materialx

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

@@ -136,6 +136,9 @@ NodeItem NodeParser::get_input_link(const bNodeSocket &socket)
     case SH_NODE_TEX_CHECKER:
       parser = std::make_unique<TexCheckerNodeParser>(graph, depsgraph, material, in_node);
       break;
+    case SH_NODE_HUE_SAT:
+      parser = std::make_unique<HueSatValNodeParser>(graph, depsgraph, material, in_node);
+      break;
     default:
       CLOG_WARN(LOG_MATERIALX_SHADER, "Unsupported node: %s (%d)", in_node->name, in_node->type);
       return res;

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

@@ -68,5 +68,6 @@ DECLARE_PARSER(TexCheckerNodeParser)
 DECLARE_PARSER(TexEnvironmentNodeParser)
 DECLARE_PARSER(TexImageNodeParser)
 DECLARE_PARSER(TexNoiseNodeParser)
+DECLARE_PARSER(HueSatValNodeParser)
 
 }  // namespace blender::nodes::materialx