math/bezier/point.cpp

0001 /*
0002  * SPDX-FileCopyrightText: 2019-2023 Mattia Basaglia <dev@dragon.best>
0003  *
0004  * SPDX-License-Identifier: GPL-3.0-or-later
0005  */
0006
0007 #include "point.hpp"
0008
0009 using namespace glaxnimate;
0010
0011
0012 void math::bezier::Point::adjust_handles_from_type()
0013 {
0014     if ( type != math::bezier::PointType::Corner )
0015     {
0016         math::PolarVector<QPointF> p_in(tan_in - pos);
0017         math::PolarVector<QPointF> p_out(tan_out - pos);
0018
0019         qreal in_angle = (p_in.angle + p_out.angle + pi) / 2;
0020         if ( p_in.angle < p_out.angle )
0021             in_angle += pi;
0022         p_in.angle = in_angle;
0023         p_out.angle = in_angle + pi;
0024
0025         if ( type == math::bezier::PointType::Symmetrical )
0026             p_in.length = p_out.length = (p_in.length + p_out.length) / 2;
0027
0028         tan_in = p_in.to_cartesian() + pos;
0029         tan_out = p_out.to_cartesian() + pos;
0030     }
0031 }
0032
0033 void math::bezier::Point::transform(const QTransform& t)
0034 {
0035     pos = t.map(pos);
0036     tan_in = t.map(tan_in);
0037     tan_out = t.map(tan_out);
0038 }