CUMathBase.h

//
//  CUMathBase.h
//  CUGL
//
//  Created by Walker White on 5/30/16.
//  Copyright © 2016 Game Design Initiative at Cornell. All rights reserved.
//

// TODO: COMMENT THIS FILE
#ifndef __CU_MATH_BASE_H__
#define __CU_MATH_BASE_H__
#include <cugl/base/CUBase.h>
#include <string>
#include <math.h>
#include <algorithm>

#if defined (__WINDOWS__)
    #define M_PI_2     1.57079632679489661923f   // pi/2
    #define M_PI_4     0.785398163397448309616f  // pi/4
    #define __attribute__(x)    
#endif


#define CU_MATH_DEG_TO_RAD(x)          ((x) * 0.0174532925f)

#define CU_MATH_RAD_TO_DEG(x)          ((x)* 57.29577951f)

#define CU_MATH_APPROX(x,y,t)          ( -(t) < (x)-(y) && (x)-(y) < (t) )

#define CU_MATH_FLOAT_SMALL            1.0e-30f     // Set by SSE

#define CU_MATH_EPSILON                5.0e-4f      // Set by SSE

#if defined (__WINDOWS__)
    #define NOMAXMIN
#endif

#if defined (__ANDROID__)
    #include <android/cpu-features.h>
#endif

// Define the vectorization support
// By experimentation, there are only two vectorizations worth supporting
#if defined (__arm64__)
    #define CU_MATH_VECTOR_NEON64
    #include <arm_neon.h>
#elif defined (__SSE__) && defined (__MACOSX__)
    // Windows vector math has not been properly resolved
    #define CU_MATH_VECTOR_SSE
    #include "immintrin.h"
    #include "smmintrin.h"
    #include "xmmintrin.h"
#endif

inline float clampf(float value, float min, float max) {
    return value < min ? min : value < max? value : max;
}

inline GLubyte clampb(GLuint value, GLubyte min, GLubyte max) {
    return static_cast<GLubyte>(value < min ? min : value < max? value : max);
}

int nextPOT(int x);

#endif /* CU_MATH_BASE_H */