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Differential D12551 Diff 42014 source/blender/nodes/geometry/nodes/legacy/node_geo_point_separate.cc

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source/blender/nodes/geometry/nodes/legacy/node_geo_point_separate.cc

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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 "BKE_attribute_math.hh"
#include "BKE_mesh.h"
#include "BKE_pointcloud.h"
#include "DNA_mesh_types.h"
#include "DNA_pointcloud_types.h"
#include "node_geometry_util.hh"
namespace blender::nodes {
static void geo_node_legacy_point_instance_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Geometry>("Geometry");
b.add_input<decl::String>("Mask");
b.add_output<decl::Geometry>("Geometry 1");
b.add_output<decl::Geometry>("Geometry 2");
}
template<typename T>
static void copy_data_based_on_mask(Span<T> data,
Span<bool> masks,
const bool invert,
MutableSpan<T> out_data)
{
int offset = 0;
for (const int i : data.index_range()) {
if (masks[i] != invert) {
out_data[offset] = data[i];
offset++;
}
}
}
void legacy_copy_point_attributes_based_on_mask(const GeometryComponent &in_component,
GeometryComponent &result_component,
Span<bool> masks,
const bool invert)
{
for (const AttributeIDRef &attribute_id : in_component.attribute_ids()) {
ReadAttributeLookup attribute = in_component.attribute_try_get_for_read(attribute_id);
const CustomDataType data_type = bke::cpp_type_to_custom_data_type(attribute.varray->type());
/* Only copy point attributes. Theoretically this could interpolate attributes on other
* domains to the point domain, but that would conflict with attributes that are built-in
* on other domains, which causes creating the attributes to fail. */
if (attribute.domain != ATTR_DOMAIN_POINT) {
continue;
}
OutputAttribute result_attribute = result_component.attribute_try_get_for_output_only(
attribute_id, ATTR_DOMAIN_POINT, data_type);
attribute_math::convert_to_static_type(data_type, [&](auto dummy) {
using T = decltype(dummy);
GVArray_Span<T> span{*attribute.varray};
MutableSpan<T> out_span = result_attribute.as_span<T>();
copy_data_based_on_mask(span, masks, invert, out_span);
});
result_attribute.save();
}
}
static void create_component_points(GeometryComponent &component, const int total)
{
switch (component.type()) {
case GEO_COMPONENT_TYPE_MESH:
static_cast<MeshComponent &>(component).replace(BKE_mesh_new_nomain(total, 0, 0, 0, 0));
break;
case GEO_COMPONENT_TYPE_POINT_CLOUD:
static_cast<PointCloudComponent &>(component).replace(BKE_pointcloud_new_nomain(total));
break;
default:
BLI_assert(false);
break;
}
}
static void separate_points_from_component(const GeometryComponent &in_component,
GeometryComponent &out_component,
const StringRef mask_name,
const bool invert)
{
if (!in_component.attribute_domain_supported(ATTR_DOMAIN_POINT) ||
in_component.attribute_domain_size(ATTR_DOMAIN_POINT) == 0) {
return;
}
const GVArray_Typed<bool> mask_attribute = in_component.attribute_get_for_read<bool>(
mask_name, ATTR_DOMAIN_POINT, false);
VArray_Span<bool> masks{mask_attribute};
const int total = masks.count(!invert);
if (total == 0) {
return;
}
create_component_points(out_component, total);
copy_point_attributes_based_on_mask(in_component, out_component, masks, invert);
}
static GeometrySet separate_geometry_set(const GeometrySet &set_in,
const StringRef mask_name,
const bool invert)
{
GeometrySet set_out;
for (const GeometryComponent *component : set_in.get_components_for_read()) {
if (component->type() == GEO_COMPONENT_TYPE_CURVE) {
/* Don't support the curve component for now, even though it has a point domain. */
continue;
}
GeometryComponent &out_component = set_out.get_component_for_write(component->type());
separate_points_from_component(*component, out_component, mask_name, invert);
}
return set_out;
}
static void geo_node_legacy_point_separate_exec(GeoNodeExecParams params)
{
bool wait_for_inputs = false;
wait_for_inputs |= params.lazy_require_input("Geometry");
wait_for_inputs |= params.lazy_require_input("Mask");
if (wait_for_inputs) {
return;
}
const std::string mask_attribute_name = params.get_input<std::string>("Mask");
GeometrySet geometry_set = params.get_input<GeometrySet>("Geometry");
/* TODO: This is not necessary-- the input geometry set can be read only,
* but it must be rewritten to handle instance groups. */
geometry_set = geometry_set_realize_instances(geometry_set);
if (params.lazy_output_is_required("Geometry 1")) {
params.set_output("Geometry 1",
separate_geometry_set(geometry_set, mask_attribute_name, true));
}
if (params.lazy_output_is_required("Geometry 2")) {
params.set_output("Geometry 2",
separate_geometry_set(geometry_set, mask_attribute_name, false));
}
}
} // namespace blender::nodes
void register_node_type_geo_legacy_point_separate()
{
static bNodeType ntype;
geo_node_type_base(
&ntype, GEO_NODE_LEGACY_POINT_SEPARATE, "Point Separate", NODE_CLASS_GEOMETRY, 0);
ntype.declare = blender::nodes::geo_node_legacy_point_instance_declare;
ntype.geometry_node_execute = blender::nodes::geo_node_legacy_point_separate_exec;
ntype.geometry_node_execute_supports_laziness = true;
nodeRegisterType(&ntype);
}