File indexing completed on 2024-12-15 04:01:13

 /*
  * SPDX-FileCopyrightText: 2019-2023 Mattia Basaglia <dev@dragon.best>
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 #pragma once
 
 #include <QPointF>
 
 #include "bezier/bezier.hpp"
 
 namespace glaxnimate::math {
 
 class EllipseSolver
 {
 public:
     /**
      * \param center      2D vector, center of the ellipse
      * \param radii       2D vector, x/y radius of the ellipse
      * \param xrot        Angle between the main axis of the ellipse and the x axis (in radians)
      */
     EllipseSolver(const QPointF& center, const QPointF& radii, qreal xrot);
 
     QPointF point(qreal t) const;
 
     QPointF derivative(qreal t) const;
 
     bezier::Bezier to_bezier(qreal anglestart, qreal angle_delta);
 
     static bezier::Bezier from_svg_arc(
         QPointF start, qreal rx, qreal ry, qreal xrot,
         bool large, bool sweep, QPointF dest
     );
 
 private:
     static qreal _alpha(qreal step);
 
     static QPointF _matrix_mul(qreal phi, const QPointF p, qreal sin_mul=1);
 
     static qreal _angle(const QPointF& u, const QPointF& v);
 
     QPointF center;
     QPointF radii;
     qreal xrot;
 };
 
 } // namespace glaxnimate::math