Martin Natano
117 lines
4.2 KiB
C++
117 lines
4.2 KiB
C++
#ifndef CUBIC_SPLINE_H
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#define CUBIC_SPLINE_H
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#include "RageTypes.h"
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#include <cstddef>
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#include <vector>
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struct lua_State;
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struct CubicSpline
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{
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CubicSpline() :m_spatial_extent(0.0f) {}
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void solve_looped();
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void solve_straight();
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void solve_polygonal();
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void p_and_tfrac_from_t(float t, bool loop, std::size_t& p, float& tfrac) const;
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float evaluate(float t, bool loop) const;
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float evaluate_derivative(float t, bool loop) const;
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float evaluate_second_derivative(float t, bool loop) const;
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float evaluate_third_derivative(float t, bool loop) const;
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void set_point(std::size_t i, float v);
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void set_coefficients(std::size_t i, float b, float c, float d);
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void get_coefficients(std::size_t i, float& b, float& c, float& d) const;
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void set_point_and_coefficients(std::size_t i, float a, float b, float c, float d);
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void get_point_and_coefficients(std::size_t i, float& a, float& b, float& c, float& d) const;
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void resize(std::size_t s);
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std::size_t size() const;
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bool empty() const;
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float m_spatial_extent;
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private:
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bool check_minimum_size();
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void prep_inner(std::size_t last, std::vector<float>& results);
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void set_results(std::size_t last, std::vector<float>& diagonals, std::vector<float>& results);
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struct SplinePoint
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{
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float a, b, c, d;
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};
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std::vector<SplinePoint> m_points;
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};
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struct CubicSplineN
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{
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CubicSplineN()
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:m_owned_by_actor(false), m_loop(false), m_polygonal(false), m_dirty(true)
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{}
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static void weighted_average(CubicSplineN& out, const CubicSplineN& from,
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const CubicSplineN& to, float between);
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void solve();
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void evaluate(float t, std::vector<float>& v) const;
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void evaluate_derivative(float t, std::vector<float>& v) const;
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void evaluate_second_derivative(float t, std::vector<float>& v) const;
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void evaluate_third_derivative(float t, std::vector<float>& v) const;
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void evaluate(float t, RageVector3& v) const;
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void evaluate_derivative(float t, RageVector3& v) const;
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void set_point(std::size_t i, const std::vector<float>& v);
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void set_coefficients(std::size_t i, const std::vector<float>& b,
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const std::vector<float>& c, const std::vector<float>& d);
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void get_coefficients(std::size_t i, std::vector<float>& b,
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std::vector<float>& c, std::vector<float>& d);
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void set_spatial_extent(std::size_t i, float extent);
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float get_spatial_extent(std::size_t i);
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void resize(std::size_t s);
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std::size_t size() const;
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void redimension(std::size_t d);
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std::size_t dimension() const;
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bool empty() const;
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float get_max_t() const {
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if(m_loop) { return static_cast<float>(size()); }
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else { return static_cast<float>(size()-1); }
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}
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typedef std::vector<CubicSpline> spline_cont_t;
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void set_loop(bool l);
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bool get_loop() const;
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void set_polygonal(bool p);
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bool get_polygonal() const;
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void set_dirty(bool d);
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bool get_dirty() const;
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bool m_owned_by_actor;
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void PushSelf(lua_State* L);
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private:
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bool m_loop;
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bool m_polygonal;
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bool m_dirty;
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spline_cont_t m_splines;
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};
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#endif
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// Side note: Actually written between 2014/12/26 and 2014/12/28
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/*
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* Copyright (c) 2014-2015 Eric Reese
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, and/or sell copies of the Software, and to permit persons to
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* whom the Software is furnished to do so, provided that the above
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* copyright notice(s) and this permission notice appear in all copies of
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* the Software and that both the above copyright notice(s) and this
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* permission notice appear in supporting documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
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* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
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* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
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* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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