public static HsbColor FromColor(Color color)
{
var ret = new HsbColor(0f, 0f, 0f, color.a);
var r = color.r;
var g = color.g;
var b = color.b;
var max = Mathf.Max(r, Mathf.Max(g, b));
if (max <= 0)
{
return(ret);
}
var min = Mathf.Min(r, Mathf.Min(g, b));
var dif = max - min;
if (max > min)
{
if (Math.Abs(g - max) < Tolerance)
{
ret.H = (b - r) / dif * 60f + 120f;
}
else if (Math.Abs(b - max) < Tolerance)
{
ret.H = (r - g) / dif * 60f + 240f;
}
else if (b > g)
{
ret.H = (g - b) / dif * 60f + 360f;
}
else
{
ret.H = (g - b) / dif * 60f;
}
if (ret.H < 0)
{
ret.H = ret.H + 360f;
}
}
else
{
ret.H = 0;
}
ret.H *= 1f / 360f;
ret.S = dif / max * 1f;
ret.B = max;
return(ret);
}
public static HsbColor Lerp(HsbColor a, HsbColor b, float t)
{
float h, s;
//check special case black (color.b==0): interpolate neither hue nor saturation!
//check special case grey (color.s==0): don't interpolate hue!
if (Math.Abs(a.B) < Tolerance)
{
h = b.H;
s = b.S;
}
else if (Math.Abs(b.B) < Tolerance)
{
h = a.H;
s = a.S;
}
else
{
if (Math.Abs(a.S) < Tolerance)
{
h = b.H;
}
else if (Math.Abs(b.S) < Tolerance)
{
h = a.H;
}
else
{
// works around bug with LerpAngle
var angle = Mathf.LerpAngle(a.H * 360f, b.H * 360f, t);
while (angle < 0f)
{
angle += 360f;
}
while (angle > 360f)
{
angle -= 360f;
}
h = angle / 360f;
}
s = Mathf.Lerp(a.S, b.S, t);
}
return(new HsbColor(h, s, Mathf.Lerp(a.B, b.B, t), Mathf.Lerp(a.A, b.A, t)));
}
public static Color ToColor(HsbColor hsbColor)
{
var r = hsbColor.B;
var g = hsbColor.B;
var b = hsbColor.B;
if (Math.Abs(hsbColor.S) < Tolerance)
{
return(new Color(Mathf.Clamp01(r), Mathf.Clamp01(g), Mathf.Clamp01(b), hsbColor.A));
}
var max = hsbColor.B;
var dif = hsbColor.B * hsbColor.S;
var min = hsbColor.B - dif;
var h = hsbColor.H * 360f;
if (h < 60f)
{
r = max;
g = h * dif / 60f + min;
b = min;
}
else if (h < 120f)
{
r = -(h - 120f) * dif / 60f + min;
g = max;
b = min;
}
else if (h < 180f)
{
r = min;
g = max;
b = (h - 120f) * dif / 60f + min;
}
else if (h < 240f)
{
r = min;
g = -(h - 240f) * dif / 60f + min;
b = max;
}
else if (h < 300f)
{
r = (h - 240f) * dif / 60f + min;
g = min;
b = max;
}
else if (h <= 360f)
{
r = max;
g = min;
b = -(h - 360f) * dif / 60 + min;
}
else
{
r = 0;
g = 0;
b = 0;
}
return(new Color(Mathf.Clamp01(r), Mathf.Clamp01(g), Mathf.Clamp01(b), hsbColor.A));
}
