private const double CardinalOffset = CardinalSegment / 2.0; // offset the pieces by 1/2 their size
public Direction GetCardinalDir()
{
var ang = Theta % (2 * Math.PI);
if (ang < 0.0f) // convert -PI > PI to 0 > 2PI
{
ang += 2 * (float)Math.PI;
}
return((Direction)(Math.Floor((ang + CardinalOffset) / CardinalSegment) * 2 % 8));
}
public static double NextPowerOfTwo(double n)
{
if (double.IsNaN(n) || double.IsInfinity(n))
{
throw new ArgumentOutOfRangeException(nameof(n), "Must be a number.");
}
if (n <= 0)
{
throw new ArgumentOutOfRangeException(nameof(n), "Must be positive.");
}
// Don't return negative powers of two, that's nonsense.
if (n < 1)
{
return(1.0);
}
return(Math.Pow(2, Math.Floor(Math.Log(n, 2)) + 1));
}
public static double Mod(double n, double d)
{
return(n - Math.Floor(n / d) * d);
}
public static float Floor(float f) => (float)Math.Floor(f);