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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "BKE_spline.hh"
#include "UI_interface.h"
#include "UI_resources.h"
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_curve_endpoint_selection_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Int>(N_("Start Size"))
.min(0)
.default_value(1)
.supports_field()
.description(N_("The amount of points to select from the start of each spline"));
b.add_input<decl::Int>(N_("End Size"))
.min(0)
.default_value(1)
.supports_field()
.description(N_("The amount of points to select from the end of each spline"));
b.add_output<decl::Bool>(N_("Selection"))
.field_source()
.description(
N_("The selection from the start and end of the splines based on the input sizes"));
}
static void select_by_spline(const int start, const int end, MutableSpan<bool> r_selection)
{
const int size = r_selection.size();
const int start_use = std::min(start, size);
const int end_use = std::min(end, size);
r_selection.slice(0, start_use).fill(true);
r_selection.slice(size - end_use, end_use).fill(true);
}
class EndpointFieldInput final : public GeometryFieldInput {
Field<int> start_size_;
Field<int> end_size_;
public:
EndpointFieldInput(Field<int> start_size, Field<int> end_size)
: GeometryFieldInput(CPPType::get<bool>(), "Endpoint Selection node"),
start_size_(start_size),
end_size_(end_size)
{
category_ = Category::Generated;
}
GVArray get_varray_for_context(const GeometryComponent &component,
const AttributeDomain domain,
IndexMask UNUSED(mask)) const final
{
if (component.type() != GEO_COMPONENT_TYPE_CURVE || domain != ATTR_DOMAIN_POINT) {
return nullptr;
}
const CurveComponent &curve_component = static_cast<const CurveComponent &>(component);
if (!curve_component.has_curves()) {
return nullptr;
}
const std::unique_ptr<CurveEval> curve = curves_to_curve_eval(*curve_component.get_for_read());
Array<int> control_point_offsets = curve->control_point_offsets();
if (curve == nullptr || control_point_offsets.last() == 0) {
return nullptr;
}
GeometryComponentFieldContext size_context{curve_component, ATTR_DOMAIN_CURVE};
fn::FieldEvaluator evaluator{size_context, curve->splines().size()};
evaluator.add(start_size_);
evaluator.add(end_size_);
evaluator.evaluate();
const VArray<int> &start_size = evaluator.get_evaluated<int>(0);
const VArray<int> &end_size = evaluator.get_evaluated<int>(1);
const int point_size = control_point_offsets.last();
Array<bool> selection(point_size, false);
int current_point = 0;
MutableSpan<bool> selection_span = selection.as_mutable_span();
for (int i : IndexRange(curve->splines().size())) {
const SplinePtr &spline = curve->splines()[i];
if (start_size[i] <= 0 && end_size[i] <= 0) {
selection_span.slice(current_point, spline->size()).fill(false);
}
else {
int start_use = std::max(start_size[i], 0);
int end_use = std::max(end_size[i], 0);
select_by_spline(start_use, end_use, selection_span.slice(current_point, spline->size()));
}
current_point += spline->size();
}
return VArray<bool>::ForContainer(std::move(selection));
};
uint64_t hash() const override
{
return get_default_hash_2(start_size_, end_size_);
}
bool is_equal_to(const fn::FieldNode &other) const override
{
if (const EndpointFieldInput *other_endpoint = dynamic_cast<const EndpointFieldInput *>(
&other)) {
return start_size_ == other_endpoint->start_size_ && end_size_ == other_endpoint->end_size_;
}
return false;
}
};
static void node_geo_exec(GeoNodeExecParams params)
{
Field<int> start_size = params.extract_input<Field<int>>("Start Size");
Field<int> end_size = params.extract_input<Field<int>>("End Size");
Field<bool> selection_field{std::make_shared<EndpointFieldInput>(start_size, end_size)};
params.set_output("Selection", std::move(selection_field));
}
} // namespace blender::nodes::node_geo_curve_endpoint_selection_cc
void register_node_type_geo_curve_endpoint_selection()
{
namespace file_ns = blender::nodes::node_geo_curve_endpoint_selection_cc;
static bNodeType ntype;
geo_node_type_base(
&ntype, GEO_NODE_CURVE_ENDPOINT_SELECTION, "Endpoint Selection", NODE_CLASS_INPUT);
ntype.declare = file_ns::node_declare;
ntype.geometry_node_execute = file_ns::node_geo_exec;
nodeRegisterType(&ntype);
}
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