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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 "BLI_task.hh"
#include "node_geometry_util.hh"
namespace blender::nodes {
static void geo_node_rotate_instances_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Geometry>(N_("Instances")).only_instances();
b.add_input<decl::Bool>(N_("Selection")).default_value(true).hide_value().supports_field();
b.add_input<decl::Vector>(N_("Rotation")).subtype(PROP_EULER).supports_field();
b.add_input<decl::Vector>(N_("Pivot Point")).subtype(PROP_TRANSLATION).supports_field();
b.add_input<decl::Bool>(N_("Local Space")).default_value(true).supports_field();
b.add_output<decl::Geometry>(N_("Instances"));
};
static void rotate_instances(GeoNodeExecParams ¶ms, InstancesComponent &instances_component)
{
GeometryComponentFieldContext field_context{instances_component, ATTR_DOMAIN_POINT};
const int domain_size = instances_component.instances_amount();
fn::FieldEvaluator selection_evaluator{field_context, domain_size};
selection_evaluator.add(params.extract_input<Field<bool>>("Selection"));
selection_evaluator.evaluate();
const IndexMask selection = selection_evaluator.get_evaluated_as_mask(0);
fn::FieldEvaluator transforms_evaluator{field_context, &selection};
transforms_evaluator.add(params.extract_input<Field<float3>>("Rotation"));
transforms_evaluator.add(params.extract_input<Field<float3>>("Pivot Point"));
transforms_evaluator.add(params.extract_input<Field<bool>>("Local Space"));
transforms_evaluator.evaluate();
const VArray<float3> &rotations = transforms_evaluator.get_evaluated<float3>(0);
const VArray<float3> &pivots = transforms_evaluator.get_evaluated<float3>(1);
const VArray<bool> &local_spaces = transforms_evaluator.get_evaluated<bool>(2);
MutableSpan<float4x4> instance_transforms = instances_component.instance_transforms();
threading::parallel_for(selection.index_range(), 512, [&](IndexRange range) {
for (const int i_selection : range) {
const int i = selection[i_selection];
const float3 pivot = pivots[i];
float4x4 &instance_transform = instance_transforms[i];
const float4x4 rotation_matrix = float4x4::from_loc_eul_scale(
{0, 0, 0}, rotations[i], {1, 1, 1});
if (local_spaces[i]) {
instance_transform *= float4x4::from_location(pivot);
instance_transform *= rotation_matrix;
instance_transform *= float4x4::from_location(-pivot);
}
else {
const float4x4 orgiginal_transform = instance_transform;
instance_transform = float4x4::from_location(pivot);
instance_transform *= rotation_matrix;
instance_transform *= float4x4::from_location(-pivot);
instance_transform *= orgiginal_transform;
}
}
});
}
static void geo_node_rotate_instances_exec(GeoNodeExecParams params)
{
GeometrySet geometry_set = params.extract_input<GeometrySet>("Instances");
if (geometry_set.has_instances()) {
InstancesComponent &instances = geometry_set.get_component_for_write<InstancesComponent>();
rotate_instances(params, instances);
}
params.set_output("Instances", std::move(geometry_set));
}
} // namespace blender::nodes
void register_node_type_geo_rotate_instances()
{
static bNodeType ntype;
geo_node_type_base(
&ntype, GEO_NODE_ROTATE_INSTANCES, "Rotate Instances", NODE_CLASS_GEOMETRY, 0);
ntype.geometry_node_execute = blender::nodes::geo_node_rotate_instances_exec;
ntype.declare = blender::nodes::geo_node_rotate_instances_declare;
nodeRegisterType(&ntype);
}
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