source/blender/nodes/shader/CMakeLists.txt

@@ -150,6 +150,7 @@ if(WITH_MATERIALX)
     materialx/nodes/blackbody.cc
     materialx/nodes/brightness.cc
     materialx/nodes/bsdf_principled.cc
+    materialx/nodes/clamp.cc
     materialx/nodes/huesatval.cc
     materialx/nodes/invert.cc
     materialx/nodes/math.cc

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

@@ -0,0 +1,23 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include "node_parser.h"
+
+namespace blender::nodes::materialx {
+
+NodeItem ClampNodeParser::compute()
+{
+  auto type = node_->custom1;
+  NodeItem value = get_input_value("Value", NodeItem::Type::Float);
+  NodeItem min = get_input_value("Min", NodeItem::Type::Float);
+  NodeItem max = get_input_value("Max", NodeItem::Type::Float);
+
+  if (type == NODE_CLAMP_MINMAX) {
+    min = min.if_else(NodeItem::CompareOp::Greater, max, max, min);
+  }
+
+  return value.clamp(min, max);
+}
+
+}  // namespace blender::nodes::materialx

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

@@ -135,6 +135,7 @@ NodeItem NodeParser::get_input_link(const bNodeSocket &socket)
     CASE_NODE_TYPE(SH_NODE_BLACKBODY, BlackbodyNodeParser)
     CASE_NODE_TYPE(SH_NODE_BRIGHTCONTRAST, BrightContrastNodeParser)
     CASE_NODE_TYPE(SH_NODE_BSDF_PRINCIPLED, BSDFPrincipledNodeParser)
+    CASE_NODE_TYPE(SH_NODE_CLAMP, ClampNodeParser)
     CASE_NODE_TYPE(SH_NODE_COMBINE_COLOR, CombineColorNodeParser)
     CASE_NODE_TYPE(SH_NODE_COMBXYZ, CombineXYZNodeParser)
     CASE_NODE_TYPE(SH_NODE_HUE_SAT, HueSatValNodeParser)

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

@@ -66,6 +66,7 @@ template<class T> NodeItem NodeParser::value(const T &data) const
 DECLARE_PARSER(BlackbodyNodeParser)
 DECLARE_PARSER(BrightContrastNodeParser)
 DECLARE_PARSER(BSDFPrincipledNodeParser)
+DECLARE_PARSER(ClampNodeParser)
 DECLARE_PARSER(CombineColorNodeParser)
 DECLARE_PARSER(CombineXYZNodeParser)
 DECLARE_PARSER(HueSatValNodeParser)