double normalize_value(double number, double min, double max)
Return the double "number" normalized between "min" and "max" both included.
This function is very similar to the "mod" function.
if max is tinier than min, the 2 values are swapped. If max - min = 0, 0 is returned.
This function was added in the version 0.1 and last edited in the version 0.1.
int sign(double number)
Return the sign of "number", -1 or 1.
This function was added in the version 0.1 and last edited in the version 0.1.