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rubberduckycooly
GitHub Repository: rubberduckycooly/Sonic-1-2-2013-Decompilation
 Path: blob/main/RSDKv4/Math.hpp
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#ifndef MATH_H

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#define MATH_H

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#ifndef M_PI

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#define M_PI 3.14159265358979323846264338327950288

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#endif

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#undef M_PI_2

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#define M_PI_2 (M_PI * 2.0)

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#undef M_PI_H

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#define M_PI_H (M_PI * 0.5)

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#define MEM_ZERO(x)  memset(&(x), 0, sizeof((x)))

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#define MEM_ZEROP(x) memset((x), 0, sizeof(*(x)))

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extern int sinM7LookupTable[0x200];

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extern int cosM7LookupTable[0x200];

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extern int sin512LookupTable[0x200];

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extern int cos512LookupTable[0x200];

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extern int sin256LookupTable[0x100];

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extern int cos256LookupTable[0x100];

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extern byte arcTan256LookupTable[0x100 * 0x100];

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// Setup Angles

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void CalculateTrigAngles();

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inline int Sin512(int angle)

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{

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    if (angle < 0)

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        angle = 0x200 - angle;

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    angle &= 0x1FF;

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    return sin512LookupTable[angle];

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}

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inline int Cos512(int angle)

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{

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    if (angle < 0)

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        angle = 0x200 - angle;

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    angle &= 0x1FF;

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    return cos512LookupTable[angle];

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}

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inline int Sin256(int angle)

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{

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    if (angle < 0)

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        angle = 0x100 - angle;

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    angle &= 0xFF;

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    return sin256LookupTable[angle];

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}

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inline int Cos256(int angle)

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{

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    if (angle < 0)

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        angle = 0x100 - angle;

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    angle &= 0xFF;

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    return cos256LookupTable[angle];

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}

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// Get Arc Tan value

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byte ArcTanLookup(int X, int Y);

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inline double DegreesToRad(float degrees) { return (M_PI / 180) * degrees; }

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#endif // !MATH_H

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