source/blender/nodes/geometry/nodes/node_geo_geometry_to_instance.cc


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/* SPDX-License-Identifier: GPL-2.0-or-later */

#include "node_geometry_util.hh"

namespace blender::nodes::node_geo_geometry_to_instance_cc {

static void node_declare(NodeDeclarationBuilder &b)
{
  b.add_input<decl::Geometry>(N_("Geometry")).multi_input();
  b.add_output<decl::Geometry>(N_("Instances"));
}

static void node_geo_exec(GeoNodeExecParams params)
{
  Vector<GeometrySet> geometries = params.extract_input<Vector<GeometrySet>>("Geometry");
  GeometrySet instances_geometry;
  InstancesComponent &instances_component =
      instances_geometry.get_component_for_write<InstancesComponent>();
  for (GeometrySet &geometry : geometries) {
    geometry.ensure_owns_direct_data();
    const int handle = instances_component.add_reference(std::move(geometry));
    instances_component.add_instance(handle, float4x4::identity());
  }
  params.set_output("Instances", std::move(instances_geometry));
}

}  // namespace blender::nodes::node_geo_geometry_to_instance_cc

void register_node_type_geo_geometry_to_instance()
{
  namespace file_ns = blender::nodes::node_geo_geometry_to_instance_cc;

  static bNodeType ntype;

  geo_node_type_base(
      &ntype, GEO_NODE_GEOMETRY_TO_INSTANCE, "Geometry to Instance", NODE_CLASS_GEOMETRY);
  node_type_size(&ntype, 160, 100, 300);
  ntype.geometry_node_execute = file_ns::node_geo_exec;
  ntype.declare = file_ns::node_declare;
  nodeRegisterType(&ntype);
}