public static float Wrap01(float value)
{
int n = Mathf.FloorToInt(value);
float result = value - n;
GLDebug.Assert(InRange01(result), "result is not in [0, 1)");
return(result);
}
/// <summary>
/// Linearly interpolates between two values between 0 and 1 if values wrap around from 1 back to 0.
/// </summary>
/// <remarks>This is useful, for example, in lerping between angles.</remarks>
/// <example>
/// <code>float angleInRad1 = 1;
/// float angleInRad2 = 5;
/// float revolution = Mathf.PI * 2;
/// float interpolation = WLerp(angleInRad1 / revolution, angleInRad2 / revolution, 0.5f);
///
/// //interpolation == (5 + 1 + Mathf.PI * 2)/2 = 3 + Mathf.PI
/// </code>
/// </example>
public static float Wlerp01(float v1, float v2, float t)
{
GLDebug.Assert(InRange(v1, 0, 1), "v1 is not in [0, 1)");
GLDebug.Assert(InRange(v2, 0, 1), "v2 is not in [0, 1)");
if (Mathf.Abs(v1 - v2) <= 0.5f)
{
return(Mathf.Lerp(v1, v2, t));
}
else if (v1 <= v2)
{
return(Frac(Mathf.Lerp(v1 + 1, v2, t)));
}
else
{
return(Frac(Mathf.Lerp(v1, v2 + 1, t)));
}
}