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

 /*
  * SPDX-FileCopyrightText: 2019-2023 Mattia Basaglia <dev@dragon.best>
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 #pragma once
 
 #include "bezier.hpp"
 
 namespace glaxnimate::math::bezier {
 
 class LengthData
 {
 public:
     struct SplitInfo
     {
         int index = 0;
         qreal ratio = 0;
         qreal length = 0;
         const LengthData* child = nullptr;
 
         SplitInfo descend() const
         {
             return child->at_ratio(ratio);
         }
     };
 
     explicit LengthData(const Solver& segment, int steps);
 
     explicit LengthData(const Bezier& bez, int steps);
 
     explicit LengthData(const MultiBezier& mbez, int steps);
 
 
     SplitInfo at_ratio(qreal ratio) const;
 
     SplitInfo at_length(qreal length) const;
 
     /**
      * \brief Returns the length such that
      *        `at_length(length).ratio == ratio`
      */
     qreal from_ratio(qreal ratio) const;
 
     qreal length() const noexcept;
 
     /**
      * \returns The length at which the child at \p index starts
      */
     qreal child_start(int index) const;
 
     /**
      * \returns The length at which the child at \p index ends
      */
     qreal child_end(int index) const;
 
 private:
     LengthData(qreal t, qreal length, qreal cumulative_length);
 
     qreal t_ = 0;
     qreal length_ = 0;
     qreal cumulative_length_ = 0;
     std::vector<LengthData> children_;
     bool leaf_ = false;
 
 };
 
 } // namespace glaxnimate::math::bezier