If the argument is NaN or less than zero, then the result is NaN.
If the argument is positive infinity, then the result is positive infinity.
If the argument is positive zero or negative zero, then the result is negative infinity.

Parameters:: x - x a positive number

Returns:: the value log a, the base-10 logarithm of the input value

public static int wrap(int index, int max)

Computes an index which wraps around a given maximum value. For values >= 0, this is equals to val % max. For values < 0, this is equal to max - (-val) % max

Parameters:: index - index the value to wrap; max - max the maximum value (or modulus)

Returns:: the wrapped index

public static double average(double x1, double x2)

Computes the average of two numbers.

Parameters:: x1 - x1 a number; x2 - x2 a number

Returns:: the average of the inputs

public static double max(double v1, double v2, double v3)

public static double max(double v1, double v2, double v3, double v4)

public static double min(double v1, double v2, double v3, double v4)