source/blender/gpu/shaders/material/gpu_shader_material_conductor.glsl

@@ -0,0 +1,30 @@
+/* SPDX-FileCopyrightText: 2019-2023 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+void node_bsdf_glossy(vec4 color,
+                      float roughness,
+                      float anisotropy,
+                      float rotation,
+                      vec3 N,
+                      vec3 T,
+                      float weight,
+                      const float do_multiscatter,
+                      out Closure result)
+{
+  N = safe_normalize(N);
+  vec3 V = coordinate_incoming(g_data.P);
+  float NV = dot(N, V);
+
+  vec2 split_sum = brdf_lut(NV, roughness);
+
+  ClosureReflection reflection_data;
+  reflection_data.weight = weight;
+  reflection_data.color = (do_multiscatter != 0.0) ?
+                              F_brdf_multi_scatter(color.rgb, color.rgb, split_sum) :
+                              F_brdf_single_scatter(color.rgb, color.rgb, split_sum);
+  reflection_data.N = N;
+  reflection_data.roughness = roughness;
+
+  result = closure_eval(reflection_data);
+}

source/blender/nodes/shader/nodes/node_shader_bsdf_conductor.cc

@@ -0,0 +1,112 @@
+/* SPDX-FileCopyrightText: 2005 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include "node_shader_util.hh"
+
+#include "UI_interface.hh"
+#include "UI_resources.hh"
+
+namespace blender::nodes::node_shader_bsdf_glossy_cc {
+
+static void node_declare(NodeDeclarationBuilder &b)
+{
+  b.add_input<decl::Color>("Color").default_value({0.8f, 0.8f, 0.8f, 1.0f});
+  b.add_input<decl::Float>("Roughness")
+      .default_value(0.5f)
+      .min(0.0f)
+      .max(1.0f)
+      .subtype(PROP_FACTOR);
+  b.add_input<decl::Float>("Anisotropy").default_value(0.0f).min(-1.0f).max(1.0f);
+  b.add_input<decl::Float>("Rotation")
+      .default_value(0.0f)
+      .min(0.0f)
+      .max(1.0f)
+      .subtype(PROP_FACTOR);
+  b.add_input<decl::Vector>("Normal").hide_value();
+  b.add_input<decl::Vector>("Tangent").hide_value();
+  b.add_input<decl::Float>("Weight").unavailable();
+  b.add_output<decl::Shader>("BSDF");
+}
+
+static void node_shader_buts_glossy(uiLayout *layout, bContext * /*C*/, PointerRNA *ptr)
+{
+  uiItemR(layout, ptr, "distribution", UI_ITEM_R_SPLIT_EMPTY_NAME, "", ICON_NONE);
+}
+
+static void node_shader_init_glossy(bNodeTree * /*ntree*/, bNode *node)
+{
+  node->custom1 = SHD_GLOSSY_MULTI_GGX;
+}
+
+static int node_shader_gpu_bsdf_glossy(GPUMaterial *mat,
+                                       bNode *node,
+                                       bNodeExecData * /*execdata*/,
+                                       GPUNodeStack *in,
+                                       GPUNodeStack *out)
+{
+  if (!in[4].link) {
+    GPU_link(mat, "world_normals_get", &in[4].link);
+  }
+
+  GPU_material_flag_set(mat, GPU_MATFLAG_GLOSSY);
+
+  float use_multi_scatter = (node->custom1 == SHD_GLOSSY_MULTI_GGX) ? 1.0f : 0.0f;
+
+  return GPU_stack_link(mat, node, "node_bsdf_glossy", in, out, GPU_constant(&use_multi_scatter));
+}
+
+NODE_SHADER_MATERIALX_BEGIN
+#ifdef WITH_MATERIALX
+{
+  if (to_type_ != NodeItem::Type::BSDF) {
+    return empty();
+  }
+
+  NodeItem color = get_input_value("Color", NodeItem::Type::Color3);
+  NodeItem roughness = get_input_value("Roughness", NodeItem::Type::Vector2);
+  NodeItem anisotropy = get_input_value("Anisotropy", NodeItem::Type::Color3);
+  NodeItem normal = get_input_link("Normal", NodeItem::Type::Vector3);
+  NodeItem tangent = get_input_link("Tangent", NodeItem::Type::Vector3);
+
+  NodeItem artistic_ior = create_node("artistic_ior",
+                                      NodeItem::Type::Multioutput,
+                                      {{"reflectivity", color}, {"edge_color", color}});
+  NodeItem ior_out = artistic_ior.add_output("ior", NodeItem::Type::Color3);
+  NodeItem extinction_out = artistic_ior.add_output("extinction", NodeItem::Type::Color3);
+
+  return create_node("conductor_bsdf",
+                     NodeItem::Type::BSDF,
+                     {{"normal", normal},
+                      {"tangent", tangent},
+                      {"ior", ior_out},
+                      {"extinction", extinction_out},
+                      {"roughness", roughness}});
+}
+#endif
+NODE_SHADER_MATERIALX_END
+
+}  // namespace blender::nodes::node_shader_bsdf_glossy_cc
+
+/* node type definition */
+void register_node_type_sh_bsdf_glossy()
+{
+  namespace file_ns = blender::nodes::node_shader_bsdf_glossy_cc;
+
+  static bNodeType ntype;
+
+  sh_node_type_base(&ntype, SH_NODE_BSDF_GLOSSY, "Glossy BSDF", NODE_CLASS_SHADER);
+  ntype.declare = file_ns::node_declare;
+  ntype.add_ui_poll = object_shader_nodes_poll;
+  ntype.draw_buttons = file_ns::node_shader_buts_glossy;
+  blender::bke::node_type_size_preset(&ntype, blender::bke::eNodeSizePreset::MIDDLE);
+  ntype.initfunc = file_ns::node_shader_init_glossy;
+  ntype.gpu_fn = file_ns::node_shader_gpu_bsdf_glossy;
+  ntype.materialx_fn = file_ns::node_shader_materialx;
+
+  nodeRegisterType(&ntype);
+
+  /* Needed to preserve API compatibility with older versions which had separate
+   * Glossy and Anisotropic nodes. */
+  nodeRegisterAlias(&ntype, "ShaderNodeBsdfGlossy");
+}