Math.flow

const float PI = 3.14159265358979323846f;

int Pow( int x, int n )
{
    int number = 1;

    if (n >= 0)
    {
        for ( int i = 0; i < n; ++i )
            number *= x;
    }
    else
    {
        for ( int i = 0; i > n; --i )
            number /= x;
    }

    return number;
}

float PowF( int x, int n )
{
    float number = 1;

    if (n >= 0)
    {
        for ( int i = 0; i < n; ++i )
            number *= x;
    }
    else
    {
        for ( int i = 0; i > n; --i )
            number /= x;
    }

    return number;
}

void QuaternionFromEulerDegrees( float x, float y, float z, out float qX, out float qY, out float qZ, out float qW )
{
    x = DegreesToRadians( x );
    y = DegreesToRadians( y );
    z = DegreesToRadians( z );
    
    QuaternionFromEuler( x, y, z, out qX, out qY, out qZ, out qW );
}

void QuaternionFromEuler( float x, float y, float z, out float qX, out float qY, out float qZ, out float qW )
{
    x *= 0.5f;
    y *= 0.5f;
    z *= 0.5f;

    float c1 = COS( x );
    float c2 = COS( y );
    float c3 = COS( z );
    float s1 = SIN( x );
    float s2 = SIN( y );
    float s3 = SIN( z );

    qW = c1 * c2 * c3 - s1 * s2 * s3;
    qX = s1 * c2 * c3 + c1 * s2 * s3;
    qY = c1 * s2 * c3 - s1 * c2 * s3;
    qZ = c1 * c2 * s3 + s1 * s2 * c3;
}

float DegreesToRadians( float degrees )
{
    return degrees * PI / 180f;
}