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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 "DEG_depsgraph_query.h"
#include "node_geometry_util.hh"
namespace blender::nodes {
static void geo_node_set_position_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::Vector>(N_("Position")).implicit_field();
b.add_input<decl::Vector>(N_("Offset")).supports_field().subtype(PROP_TRANSLATION);
b.add_output<decl::Geometry>(N_("Geometry"));
}
static void set_position_in_component(GeometryComponent &component,
const Field<bool> &selection_field,
const Field<float3> &position_field,
const Field<float3> &offset_field)
{
AttributeDomain domain = component.type() == GEO_COMPONENT_TYPE_INSTANCES ?
ATTR_DOMAIN_INSTANCE :
ATTR_DOMAIN_POINT;
GeometryComponentFieldContext field_context{component, domain};
const int domain_size = component.attribute_domain_size(domain);
if (domain_size == 0) {
return;
}
fn::FieldEvaluator selection_evaluator{field_context, domain_size};
selection_evaluator.add(selection_field);
selection_evaluator.evaluate();
const IndexMask selection = selection_evaluator.get_evaluated_as_mask(0);
fn::FieldEvaluator position_evaluator{field_context, &selection};
position_evaluator.add(position_field);
position_evaluator.add(offset_field);
position_evaluator.evaluate();
/* TODO: We could have different code paths depending on whether the offset input is a single
* value or not */
const VArray<float3> &positions_input = position_evaluator.get_evaluated<float3>(0);
const VArray<float3> &offsets_input = position_evaluator.get_evaluated<float3>(1);
OutputAttribute_Typed<float3> positions = component.attribute_try_get_for_output<float3>(
"position", domain, {0, 0, 0});
MutableSpan<float3> position_mutable = positions.as_span();
for (int i : selection) {
position_mutable[i] = positions_input[i] + offsets_input[i];
}
positions.save();
}
static void geo_node_set_position_exec(GeoNodeExecParams params)
{
GeometrySet geometry = params.extract_input<GeometrySet>("Geometry");
Field<bool> selection_field = params.extract_input<Field<bool>>("Selection");
Field<float3> offset_field = params.extract_input<Field<float3>>("Offset");
Field<float3> position_field = params.extract_input<Field<float3>>("Position");
for (const GeometryComponentType type : {GEO_COMPONENT_TYPE_MESH,
GEO_COMPONENT_TYPE_POINT_CLOUD,
GEO_COMPONENT_TYPE_CURVE,
GEO_COMPONENT_TYPE_INSTANCES}) {
if (geometry.has(type)) {
set_position_in_component(
geometry.get_component_for_write(type), selection_field, position_field, offset_field);
}
}
params.set_output("Geometry", std::move(geometry));
}
} // namespace blender::nodes
void register_node_type_geo_set_position()
{
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_SET_POSITION, "Set Position", NODE_CLASS_GEOMETRY, 0);
ntype.geometry_node_execute = blender::nodes::geo_node_set_position_exec;
ntype.declare = blender::nodes::geo_node_set_position_declare;
nodeRegisterType(&ntype);
}
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