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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 "BKE_spline.hh"
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_curve_primitive_quadratic_bezier_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Int>(N_("Resolution"))
.default_value(16)
.min(3)
.max(256)
.subtype(PROP_UNSIGNED)
.description(N_("The number of edges on the curve"));
b.add_input<decl::Vector>(N_("Start"))
.default_value({-1.0f, 0.0f, 0.0f})
.subtype(PROP_TRANSLATION)
.description(N_("Position of the first control point"));
b.add_input<decl::Vector>(N_("Middle"))
.default_value({0.0f, 2.0f, 0.0f})
.subtype(PROP_TRANSLATION)
.description(N_("Position of the middle control point"));
b.add_input<decl::Vector>(N_("End"))
.default_value({1.0f, 0.0f, 0.0f})
.subtype(PROP_TRANSLATION)
.description(N_("Position of the last control point"));
b.add_output<decl::Geometry>(N_("Curve"));
}
static std::unique_ptr<CurveEval> create_quadratic_bezier_curve(const float3 p1,
const float3 p2,
const float3 p3,
const int resolution)
{
std::unique_ptr<CurveEval> curve = std::make_unique<CurveEval>();
std::unique_ptr<PolySpline> spline = std::make_unique<PolySpline>();
spline->resize(resolution + 1);
MutableSpan<float3> positions = spline->positions();
spline->radii().fill(1.0f);
spline->tilts().fill(0.0f);
const float step = 1.0f / resolution;
for (const int i : IndexRange(resolution + 1)) {
const float factor = step * i;
const float3 q1 = math::interpolate(p1, p2, factor);
const float3 q2 = math::interpolate(p2, p3, factor);
positions[i] = math::interpolate(q1, q2, factor);
}
curve->add_spline(std::move(spline));
curve->attributes.reallocate(curve->splines().size());
return curve;
}
static void node_geo_exec(GeoNodeExecParams params)
{
std::unique_ptr<CurveEval> curve = create_quadratic_bezier_curve(
params.extract_input<float3>("Start"),
params.extract_input<float3>("Middle"),
params.extract_input<float3>("End"),
std::max(params.extract_input<int>("Resolution"), 3));
params.set_output("Curve", GeometrySet::create_with_curve(curve.release()));
}
} // namespace blender::nodes::node_geo_curve_primitive_quadratic_bezier_cc
void register_node_type_geo_curve_primitive_quadratic_bezier()
{
namespace file_ns = blender::nodes::node_geo_curve_primitive_quadratic_bezier_cc;
static bNodeType ntype;
geo_node_type_base(
&ntype, GEO_NODE_CURVE_PRIMITIVE_QUADRATIC_BEZIER, "Quadratic Bezier", NODE_CLASS_GEOMETRY);
ntype.declare = file_ns::node_declare;
ntype.geometry_node_execute = file_ns::node_geo_exec;
nodeRegisterType(&ntype);
}
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