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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "BKE_pointcloud.h"
#include "DNA_pointcloud_types.h"
#include "BLI_task.hh"
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_points_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Int>(N_("Count"))
.default_value(1)
.description(N_("The number of points to create"))
.min(0);
b.add_input<decl::Vector>(N_("Position"))
.supports_field()
.default_value(float3(0.0f))
.description(N_("The positions of the new points"));
b.add_input<decl::Float>(N_("Radius"))
.supports_field()
.subtype(PROP_DISTANCE)
.default_value(float(0.1f))
.description(N_("The radii of the new points"));
b.add_output<decl::Geometry>(N_("Geometry"));
}
class PointsFieldContext : public FieldContext {
private:
int points_num_;
public:
PointsFieldContext(const int points_num) : points_num_(points_num)
{
}
int64_t points_num() const
{
return points_num_;
}
GVArray get_varray_for_input(const FieldInput &field_input,
const IndexMask mask,
ResourceScope &UNUSED(scope)) const
{
const bke::IDAttributeFieldInput *id_field_input =
dynamic_cast<const bke::IDAttributeFieldInput *>(&field_input);
const fn::IndexFieldInput *index_field_input = dynamic_cast<const fn::IndexFieldInput *>(
&field_input);
if (id_field_input == nullptr && index_field_input == nullptr) {
return {};
}
return fn::IndexFieldInput::get_index_varray(mask);
}
};
static void node_geo_exec(GeoNodeExecParams params)
{
const int count = params.extract_input<int>("Count");
if (count <= 0) {
params.set_default_remaining_outputs();
return;
}
Field<float3> position_field = params.extract_input<Field<float3>>("Position");
Field<float> radius_field = params.extract_input<Field<float>>("Radius");
PointCloud *points = BKE_pointcloud_new_nomain(count);
MutableAttributeAccessor attributes = points->attributes_for_write();
AttributeWriter<float3> output_position = attributes.lookup_or_add_for_write<float3>(
"position", ATTR_DOMAIN_POINT);
AttributeWriter<float> output_radii = attributes.lookup_or_add_for_write<float>(
"radius", ATTR_DOMAIN_POINT);
PointsFieldContext context{count};
fn::FieldEvaluator evaluator{context, count};
evaluator.add_with_destination(position_field, output_position.varray);
evaluator.add_with_destination(radius_field, output_radii.varray);
evaluator.evaluate();
output_position.finish();
output_radii.finish();
params.set_output("Geometry", GeometrySet::create_with_pointcloud(points));
}
} // namespace blender::nodes::node_geo_points_cc
void register_node_type_geo_points()
{
namespace file_ns = blender::nodes::node_geo_points_cc;
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_POINTS, "Points", NODE_CLASS_GEOMETRY);
ntype.geometry_node_execute = file_ns::node_geo_exec;
ntype.declare = file_ns::node_declare;
nodeRegisterType(&ntype);
}
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