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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "BLI_task.hh"
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_scale_instances_cc {
static void node_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_("Scale"))
.subtype(PROP_XYZ)
.default_value({1, 1, 1})
.supports_field();
b.add_input<decl::Vector>(N_("Center")).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 scale_instances(GeoNodeExecParams ¶ms, InstancesComponent &instances_component)
{
GeometryComponentFieldContext field_context{instances_component, ATTR_DOMAIN_INSTANCE};
fn::FieldEvaluator evaluator{field_context, instances_component.instances_num()};
evaluator.set_selection(params.extract_input<Field<bool>>("Selection"));
evaluator.add(params.extract_input<Field<float3>>("Scale"));
evaluator.add(params.extract_input<Field<float3>>("Center"));
evaluator.add(params.extract_input<Field<bool>>("Local Space"));
evaluator.evaluate();
const IndexMask selection = evaluator.get_evaluated_selection_as_mask();
const VArray<float3> scales = evaluator.get_evaluated<float3>(0);
const VArray<float3> pivots = evaluator.get_evaluated<float3>(1);
const VArray<bool> local_spaces = 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];
if (local_spaces[i]) {
instance_transform *= float4x4::from_location(pivot);
rescale_m4(instance_transform.values, scales[i]);
instance_transform *= float4x4::from_location(-pivot);
}
else {
const float4x4 original_transform = instance_transform;
instance_transform = float4x4::from_location(pivot);
rescale_m4(instance_transform.values, scales[i]);
instance_transform *= float4x4::from_location(-pivot);
instance_transform *= original_transform;
}
}
});
}
static void node_geo_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>();
scale_instances(params, instances);
}
params.set_output("Instances", std::move(geometry_set));
}
} // namespace blender::nodes::node_geo_scale_instances_cc
void register_node_type_geo_scale_instances()
{
namespace file_ns = blender::nodes::node_geo_scale_instances_cc;
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_SCALE_INSTANCES, "Scale Instances", NODE_CLASS_GEOMETRY);
ntype.geometry_node_execute = file_ns::node_geo_exec;
ntype.declare = file_ns::node_declare;
nodeRegisterType(&ntype);
}
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