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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 "BKE_spline.hh"
#include "node_geometry_util.hh"
static bNodeSocketTemplate geo_node_curve_reverse_in[] = {
{SOCK_GEOMETRY, N_("Curve")},
{SOCK_STRING, N_("Selection")},
{-1, ""},
};
static bNodeSocketTemplate geo_node_curve_reverse_out[] = {
{SOCK_GEOMETRY, N_("Curve")},
{-1, ""},
};
namespace blender::nodes {
/**
* Reverse the data in a MutableSpan object.
*/
template<typename T> static void reverse_data(MutableSpan<T> r_data)
{
const int size = r_data.size();
for (const int i : IndexRange(size / 2)) {
std::swap(r_data[size - 1 - i], r_data[i]);
}
}
/**
* Reverse and Swap the data between 2 MutableSpans.
*/
template<typename T> static void reverse_data(MutableSpan<T> left, MutableSpan<T> right)
{
BLI_assert(left.size() == right.size());
const int size = left.size();
for (const int i : IndexRange(size / 2 + size % 2)) {
std::swap(left[i], right[size - 1 - i]);
std::swap(right[i], left[size - 1 - i]);
}
}
static void geo_node_curve_reverse_exec(GeoNodeExecParams params)
{
GeometrySet geometry_set = params.extract_input<GeometrySet>("Curve");
geometry_set = bke::geometry_set_realize_instances(geometry_set);
if (!geometry_set.has_curve()) {
params.set_output("Curve", geometry_set);
return;
}
/* Retrieve data for write access so we can avoid new allocations for the reversed data. */
CurveComponent &curve_component = geometry_set.get_component_for_write<CurveComponent>();
CurveEval &curve = *curve_component.get_for_write();
MutableSpan<SplinePtr> splines = curve.splines();
const std::string selection_name = params.extract_input<std::string>("Selection");
GVArray_Typed<bool> selection = curve_component.attribute_get_for_read(
selection_name, ATTR_DOMAIN_CURVE, true);
threading::parallel_for(splines.index_range(), 128, [&](IndexRange range) {
for (const int i : range) {
if (!selection[i]) {
continue;
}
reverse_data<float3>(splines[i]->positions());
reverse_data<float>(splines[i]->radii());
reverse_data<float>(splines[i]->tilts());
splines[i]->attributes.foreach_attribute(
[&](StringRefNull name, const AttributeMetaData &meta_data) {
std::optional<blender::fn::GMutableSpan> output_attribute =
splines[i]->attributes.get_for_write(name);
if (!output_attribute) {
BLI_assert_unreachable();
return false;
}
attribute_math::convert_to_static_type(meta_data.data_type, [&](auto dummy) {
using T = decltype(dummy);
reverse_data(output_attribute->typed<T>());
});
return true;
},
ATTR_DOMAIN_POINT);
/* Deal with extra info on derived types. */
if (BezierSpline *spline = dynamic_cast<BezierSpline *>(splines[i].get())) {
reverse_data<BezierSpline::HandleType>(spline->handle_types_left());
reverse_data<BezierSpline::HandleType>(spline->handle_types_right());
reverse_data<float3>(spline->handle_positions_left(), spline->handle_positions_right());
}
else if (NURBSpline *spline = dynamic_cast<NURBSpline *>(splines[i].get())) {
reverse_data<float>(spline->weights());
}
/* Nothing to do for poly splines. */
splines[i]->mark_cache_invalid();
}
});
params.set_output("Curve", geometry_set);
}
} // namespace blender::nodes
void register_node_type_geo_curve_reverse()
{
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_CURVE_REVERSE, "Curve Reverse", NODE_CLASS_GEOMETRY, 0);
node_type_socket_templates(&ntype, geo_node_curve_reverse_in, geo_node_curve_reverse_out);
ntype.geometry_node_execute = blender::nodes::geo_node_curve_reverse_exec;
nodeRegisterType(&ntype);
}
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