Introduction
This is my first C# generic function.
In computer terms, to clamp a value is to make sure that it lies between some maximum and minimum values. If it’s greater than the max value, then it’s replaced by the max, etc.
I first learned it in the context of computer graphics, for colors - it’s used, for instance, to make sure that your raytraced pixel isn't "blacker than black".
So:
public static T Clamp<T>(T value, T max, T min)
where T : System.IComparable<T> {
T result = value;
if (value.CompareTo(max) > 0)
result = max;
if (value.CompareTo(min) < 0)
result = min;
return result;
}
Usage
int i = Clamp(12, 10, 0); -> i == 10
double d = Clamp(4.5, 10.0, 0.0); -> d == 4.5
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