godot/thirdparty/thorvg/src/common/tvgMath.h

/*
 * Copyright (c) 2021 - 2024 the ThorVG project. All rights reserved.

 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef _TVG_MATH_H_
#define _TVG_MATH_H_

 #define _USE_MATH_DEFINES

#include <float.h>
#include <math.h>
#include "tvgCommon.h"

#define MATH_PI …
#define MATH_PI2 …
#define FLOAT_EPSILON …
#define PATH_KAPPA …

#define mathMin(x, y) …
#define mathMax(x, y) …


/************************************************************************/
/* General functions                                                    */
/************************************************************************/

float mathAtan2(float y, float x);

static inline float mathDeg2Rad(float degree)
{ … }


static inline float mathRad2Deg(float radian)
{ … }


static inline bool mathZero(float a)
{ … }


static inline bool mathEqual(float a, float b)
{ … }


/************************************************************************/
/* Matrix functions                                                     */
/************************************************************************/

void mathRotate(Matrix* m, float degree);
bool mathInverse(const Matrix* m, Matrix* out);
bool mathIdentity(const Matrix* m);
Matrix operator*(const Matrix& lhs, const Matrix& rhs);
bool operator==(const Matrix& lhs, const Matrix& rhs);

static inline bool mathRightAngle(const Matrix& m)
{ … }


static inline bool mathSkewed(const Matrix& m)
{ … }


static inline void mathIdentity(Matrix* m)
{ … }


static inline void mathScale(Matrix* m, float sx, float sy)
{ … }


static inline void mathScaleR(Matrix* m, float x, float y)
{ … }


static inline void mathTranslate(Matrix* m, float x, float y)
{ … }


static inline void mathTranslateR(Matrix* m, float x, float y)
{ … }


static inline bool operator!=(const Matrix& lhs, const Matrix& rhs)
{ … }


static inline void operator*=(Matrix& lhs, const Matrix& rhs)
{ … }


static inline void mathLog(const Matrix& m)
{ … }


/************************************************************************/
/* Point functions                                                      */
/************************************************************************/

void operator*=(Point& pt, const Matrix& m);
Point operator*(const Point& pt, const Matrix& m);


static inline bool mathZero(const Point& p)
{ … }


static inline float mathLength(const Point* a, const Point* b)
{ … }


static inline float mathLength(const Point& a)
{ … }


static inline bool operator==(const Point& lhs, const Point& rhs)
{ … }


static inline bool operator!=(const Point& lhs, const Point& rhs)
{ … }


static inline Point operator-(const Point& lhs, const Point& rhs)
{ … }


static inline Point operator+(const Point& lhs, const Point& rhs)
{ … }


static inline Point operator*(const Point& lhs, float rhs)
{ … }


static inline Point operator*(const float& lhs, const Point& rhs)
{ … }


static inline Point operator/(const Point& lhs, const float rhs)
{ … }


static inline Point mathNormal(const Point& p1, const Point& p2)
{ … }


static inline void mathLog(const Point& pt)
{ … }

/************************************************************************/
/* Interpolation functions                                              */
/************************************************************************/

template <typename T>
static inline T mathLerp(const T &start, const T &end, float t)
{ … }

uint8_t mathLerp(const uint8_t &start, const uint8_t &end, float t);

#endif //_TVG_MATH_H_