node_shader_object_info.cc

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/* SPDX-FileCopyrightText: 2005 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#include "node_shader_util.hh"
 
#include "DNA_material_types.h"
 
namespace blender::nodes::node_shader_object_info_cc {
 
static void node_declare(NodeDeclarationBuilder &b)
{
  b.add_output<decl::Vector>("Location");
  b.add_output<decl::Color>("Color");
  b.add_output<decl::Float>("Alpha");
  b.add_output<decl::Float>("Object Index");
  b.add_output<decl::Float>("Material Index");
  b.add_output<decl::Float>("Random");
}
 
static int node_shader_gpu_object_info(GPUMaterial *mat,
                                       bNode *node,
                                       bNodeExecData * /*execdata*/,
                                       GPUNodeStack *in,
                                       GPUNodeStack *out)
{
  Material *ma = GPU_material_get_material(mat);
  float index = ma ? ma->index : 0.0f;
  GPU_material_flag_set(mat, GPU_MATFLAG_OBJECT_INFO);
  return GPU_stack_link(mat, node, "node_object_info", in, out, GPU_constant(&index));
}
 
NODE_SHADER_MATERIALX_BEGIN
#ifdef WITH_MATERIALX
{
  /* NOTE: Some outputs isn't supported by MaterialX. */
  NodeItem res = empty();
  std::string name = socket_out_->identifier;
 
  if (name == "Location") {
    res = create_node("position", NodeItem::Type::Vector3, {{"space", val(std::string("world"))}});
  }
  else if (name == "Random") {
    res = create_node("randomfloat", NodeItem::Type::Float);
  }
  else {
    res = get_output_default(name, NodeItem::Type::Any);
  }
  return res;
}
#endif
NODE_SHADER_MATERIALX_END
 
}  // namespace blender::nodes::node_shader_object_info_cc
 
void register_node_type_sh_object_info()
{
  namespace file_ns = blender::nodes::node_shader_object_info_cc;
 
  static blender::bke::bNodeType ntype;
 
  sh_node_type_base(&ntype, "ShaderNodeObjectInfo", SH_NODE_OBJECT_INFO);
  ntype.ui_name = "Object Info";
  ntype.ui_description = "Retrieve information about the object instance";
  ntype.enum_name_legacy = "OBJECT_INFO";
  ntype.nclass = NODE_CLASS_INPUT;
  ntype.declare = file_ns::node_declare;
  ntype.gpu_fn = file_ns::node_shader_gpu_object_info;
  ntype.materialx_fn = file_ns::node_shader_materialx;
 
  blender::bke::node_register_type(ntype);
}