Why does Mathf.Sign(0) return one in Unity? According to the C# documentation, it should return zero.
Mathf.Sign(0.3); // 1
Mathf.Sign(-0.3); // -1
Mathf.Sign(0); // 1, expected 0
Mathf.Sign(0) not returning zero
Viewed 417
2 Answers
The Unity Mathf.Sign has it's own behavior. To get the expected behavior, use the standard C# Math.Sign instead.
If you look into the Mathf source code you find
public static float Sign(float f) { return f >= 0F ? 1F : -1F; }
as also mentioned in the API
Return value is
1whenfis positive or zero,-1whenfis negative.
they indeed explicitly skip the 0 value and this always returns 1 or -1.
As also already mentioned by Magnesium you should use System.Math.Sign if you want the 0 behavior.
Or actually for using float rather than double right away you could probably use System.MathF.Sign as well
Related