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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 "GEO_mesh_to_curve.hh"
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_mesh_to_curve_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Geometry>(N_("Mesh")).supported_type(GEO_COMPONENT_TYPE_MESH);
b.add_input<decl::Bool>(N_("Selection")).default_value(true).hide_value().supports_field();
b.add_output<decl::Geometry>(N_("Curve"));
}
static void node_geo_exec(GeoNodeExecParams params)
{
GeometrySet geometry_set = params.extract_input<GeometrySet>("Mesh");
geometry_set.modify_geometry_sets([&](GeometrySet &geometry_set) {
if (!geometry_set.has_mesh()) {
geometry_set.keep_only({GEO_COMPONENT_TYPE_INSTANCES});
return;
}
const MeshComponent &component = *geometry_set.get_component_for_read<MeshComponent>();
GeometryComponentFieldContext context{component, ATTR_DOMAIN_EDGE};
fn::FieldEvaluator evaluator{context, component.attribute_domain_size(ATTR_DOMAIN_EDGE)};
evaluator.add(params.get_input<Field<bool>>("Selection"));
evaluator.evaluate();
const IndexMask selection = evaluator.get_evaluated_as_mask(0);
if (selection.size() == 0) {
geometry_set.keep_only({GEO_COMPONENT_TYPE_INSTANCES});
return;
}
std::unique_ptr<CurveEval> curve = geometry::mesh_to_curve_convert(component, selection);
geometry_set.replace_curve(curve.release());
geometry_set.keep_only({GEO_COMPONENT_TYPE_CURVE, GEO_COMPONENT_TYPE_INSTANCES});
});
params.set_output("Curve", std::move(geometry_set));
}
} // namespace blender::nodes::node_geo_mesh_to_curve_cc
void register_node_type_geo_mesh_to_curve()
{
namespace file_ns = blender::nodes::node_geo_mesh_to_curve_cc;
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_MESH_TO_CURVE, "Mesh to Curve", NODE_CLASS_GEOMETRY, 0);
ntype.declare = file_ns::node_declare;
ntype.geometry_node_execute = file_ns::node_geo_exec;
nodeRegisterType(&ntype);
}
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