node_shader_emission.cc

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/* SPDX-FileCopyrightText: 2005 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#include "node_shader_util.hh"
 
namespace blender::nodes::node_shader_emission_cc {
 
static void node_declare(NodeDeclarationBuilder &b)
{
  b.add_input<decl::Color>("Color").default_value({1.0f, 1.0f, 1.0f, 1.0f});
  b.add_input<decl::Float>("Strength")
      .default_value(1.0f)
      .min(0.0f)
      .max(1000000.0f)
      .translation_context(BLT_I18NCONTEXT_AMOUNT);
  b.add_input<decl::Float>("Weight").available(false);
  b.add_output<decl::Shader>("Emission");
}
 
static int node_shader_gpu_emission(GPUMaterial *mat,
                                    bNode *node,
                                    bNodeExecData * /*execdata*/,
                                    GPUNodeStack *in,
                                    GPUNodeStack *out)
{
  GPU_material_flag_set(mat, GPU_MATFLAG_EMISSION);
  return GPU_stack_link(mat, node, "node_emission", in, out);
}
 
NODE_SHADER_MATERIALX_BEGIN
#ifdef WITH_MATERIALX
{
  if (to_type_ != NodeItem::Type::EDF) {
    return empty();
  }
 
  NodeItem color = get_input_value("Color", NodeItem::Type::Color3);
  NodeItem strength = get_input_value("Strength", NodeItem::Type::Float);
 
  return create_node("uniform_edf", NodeItem::Type::EDF, {{"color", color * strength}});
}
#endif
NODE_SHADER_MATERIALX_END
 
}  // namespace blender::nodes::node_shader_emission_cc
 
/* node type definition */
void register_node_type_sh_emission()
{
  namespace file_ns = blender::nodes::node_shader_emission_cc;
 
  static blender::bke::bNodeType ntype;
 
  sh_node_type_base(&ntype, "ShaderNodeEmission", SH_NODE_EMISSION);
  ntype.ui_name = "Emission";
  ntype.ui_description = "Lambertian emission shader";
  ntype.enum_name_legacy = "EMISSION";
  ntype.nclass = NODE_CLASS_SHADER;
  ntype.declare = file_ns::node_declare;
  ntype.gpu_fn = file_ns::node_shader_gpu_emission;
  ntype.materialx_fn = file_ns::node_shader_materialx;
 
  blender::bke::node_register_type(ntype);
}