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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_set_id_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Geometry>(N_("Geometry"));
b.add_input<decl::Bool>(N_("Selection")).default_value(true).hide_value().supports_field();
b.add_input<decl::Int>(N_("ID")).implicit_field();
b.add_output<decl::Geometry>(N_("Geometry"));
}
static void set_id_in_component(GeometryComponent &component,
const Field<bool> &selection_field,
const Field<int> &id_field)
{
GeometryComponentFieldContext field_context{component, ATTR_DOMAIN_POINT};
const int domain_size = component.attribute_domain_size(ATTR_DOMAIN_POINT);
if (domain_size == 0) {
return;
}
fn::FieldEvaluator evaluator{field_context, domain_size};
evaluator.set_selection(selection_field);
/* Since adding the ID attribute can change the result of the field evaluation (the random value
* node uses the index if the ID is unavailable), make sure that it isn't added before evaluating
* the field. However, as an optimization, use a faster code path when it already exists. */
if (component.attribute_exists("id")) {
OutputAttribute_Typed<int> id_attribute = component.attribute_try_get_for_output_only<int>(
"id", ATTR_DOMAIN_POINT);
evaluator.add_with_destination(id_field, id_attribute.varray());
evaluator.evaluate();
id_attribute.save();
}
else {
evaluator.add(id_field);
evaluator.evaluate();
const IndexMask selection = evaluator.get_evaluated_selection_as_mask();
const VArray<int> &result_ids = evaluator.get_evaluated<int>(0);
OutputAttribute_Typed<int> id_attribute = component.attribute_try_get_for_output_only<int>(
"id", ATTR_DOMAIN_POINT);
result_ids.materialize(selection, id_attribute.as_span());
id_attribute.save();
}
}
static void node_geo_exec(GeoNodeExecParams params)
{
GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");
Field<bool> selection_field = params.extract_input<Field<bool>>("Selection");
Field<int> id_field = params.extract_input<Field<int>>("ID");
for (const GeometryComponentType type : {GEO_COMPONENT_TYPE_INSTANCES,
GEO_COMPONENT_TYPE_MESH,
GEO_COMPONENT_TYPE_POINT_CLOUD,
GEO_COMPONENT_TYPE_CURVE}) {
if (geometry_set.has(type)) {
set_id_in_component(geometry_set.get_component_for_write(type), selection_field, id_field);
}
}
params.set_output("Geometry", std::move(geometry_set));
}
} // namespace blender::nodes::node_geo_set_id_cc
void register_node_type_geo_set_id()
{
namespace file_ns = blender::nodes::node_geo_set_id_cc;
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_SET_ID, "Set ID", NODE_CLASS_GEOMETRY);
ntype.geometry_node_execute = file_ns::node_geo_exec;
ntype.declare = file_ns::node_declare;
nodeRegisterType(&ntype);
}
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