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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "node_geometry_util.hh"
#include "BKE_spline.hh"
namespace blender::nodes::node_geo_input_spline_length_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_output<decl::Float>(N_("Length")).field_source();
b.add_output<decl::Int>(N_("Point Count")).field_source();
}
/* --------------------------------------------------------------------
* Spline Length
*/
static VArray<float> construct_spline_length_gvarray(const CurveComponent &component,
const AttributeDomain domain)
{
if (!component.has_curves()) {
return {};
}
const std::unique_ptr<CurveEval> curve = curves_to_curve_eval(*component.get_for_read());
Span<SplinePtr> splines = curve->splines();
auto length_fn = [splines](int i) { return splines[i]->length(); };
if (domain == ATTR_DOMAIN_CURVE) {
return VArray<float>::ForFunc(splines.size(), length_fn);
}
if (domain == ATTR_DOMAIN_POINT) {
VArray<float> length = VArray<float>::ForFunc(splines.size(), length_fn);
return component.attribute_try_adapt_domain<float>(
std::move(length), ATTR_DOMAIN_CURVE, ATTR_DOMAIN_POINT);
}
return {};
}
class SplineLengthFieldInput final : public GeometryFieldInput {
public:
SplineLengthFieldInput() : GeometryFieldInput(CPPType::get<float>(), "Spline Length node")
{
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) {
const CurveComponent &curve_component = static_cast<const CurveComponent &>(component);
return construct_spline_length_gvarray(curve_component, domain);
}
return {};
}
uint64_t hash() const override
{
/* Some random constant hash. */
return 3549623580;
}
bool is_equal_to(const fn::FieldNode &other) const override
{
return dynamic_cast<const SplineLengthFieldInput *>(&other) != nullptr;
}
};
/* --------------------------------------------------------------------
* Spline Count
*/
static VArray<int> construct_spline_count_gvarray(const CurveComponent &component,
const AttributeDomain domain)
{
if (!component.has_curves()) {
return {};
}
const std::unique_ptr<CurveEval> curve = curves_to_curve_eval(*component.get_for_read());
Span<SplinePtr> splines = curve->splines();
auto count_fn = [splines](int i) { return splines[i]->size(); };
if (domain == ATTR_DOMAIN_CURVE) {
return VArray<int>::ForFunc(splines.size(), count_fn);
}
if (domain == ATTR_DOMAIN_POINT) {
VArray<int> count = VArray<int>::ForFunc(splines.size(), count_fn);
return component.attribute_try_adapt_domain<int>(
std::move(count), ATTR_DOMAIN_CURVE, ATTR_DOMAIN_POINT);
}
return {};
}
class SplineCountFieldInput final : public GeometryFieldInput {
public:
SplineCountFieldInput() : GeometryFieldInput(CPPType::get<int>(), "Spline Point Count")
{
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) {
const CurveComponent &curve_component = static_cast<const CurveComponent &>(component);
return construct_spline_count_gvarray(curve_component, domain);
}
return {};
}
uint64_t hash() const override
{
/* Some random constant hash. */
return 456364322625;
}
bool is_equal_to(const fn::FieldNode &other) const override
{
return dynamic_cast<const SplineCountFieldInput *>(&other) != nullptr;
}
};
static void node_geo_exec(GeoNodeExecParams params)
{
Field<float> spline_length_field{std::make_shared<SplineLengthFieldInput>()};
Field<int> spline_count_field{std::make_shared<SplineCountFieldInput>()};
params.set_output("Length", std::move(spline_length_field));
params.set_output("Point Count", std::move(spline_count_field));
}
} // namespace blender::nodes::node_geo_input_spline_length_cc
void register_node_type_geo_input_spline_length()
{
namespace file_ns = blender::nodes::node_geo_input_spline_length_cc;
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_INPUT_SPLINE_LENGTH, "Spline Length", NODE_CLASS_INPUT);
ntype.geometry_node_execute = file_ns::node_geo_exec;
ntype.declare = file_ns::node_declare;
nodeRegisterType(&ntype);
}
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