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 (a.b == 0)
{
h = b.h;
s = b.s;
}
else if (b.b == 0)
{
h = a.h;
s = a.s;
}
else
{
if (a.s == 0)
{
h = b.h;
}
else if (b.s == 0)
{
h = a.h;
}
else
{
// works around bug with LerpAngle
float 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 HSBColor FromColor(Color color)
{
HSBColor ret = new HSBColor (0f, 0f, 0f, color.a);
float r = color.r;
float g = color.g;
float b = color.b;
float max = Mathf.Max (r, Mathf.Max (g, b));
if (max <= 0)
return ret;
float min = Mathf.Min (r, Mathf.Min (g, b));
float dif = max - min;
if (max > min)
{
if (g == max)
ret.h = (b - r)/dif*60f + 120f;
else if (b == max)
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 (a.b == 0)
{
h = b.h;
s = b.s;
}
else if (b.b == 0)
{
h = a.h;
s = a.s;
}
else
{
if (a.s == 0)
h = b.h;
else if (b.s == 0)
h = a.h;
else
{
// works around bug with LerpAngle
float 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)
{
float r = hsbColor.b;
float g = hsbColor.b;
float b = hsbColor.b;
if (hsbColor.s != 0)
{
float max = hsbColor.b;
float dif = hsbColor.b*hsbColor.s;
float min = hsbColor.b - dif;
float 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);
}
public static void Test()
{
HSBColor color;
color = new HSBColor (Color.red);
Debug.Log ("red: " + color);
color = new HSBColor (Color.green);
Debug.Log ("green: " + color);
color = new HSBColor (Color.blue);
Debug.Log ("blue: " + color);
color = new HSBColor (Color.grey);
Debug.Log ("grey: " + color);
color = new HSBColor (Color.white);
Debug.Log ("white: " + color);
color = new HSBColor (new Color (0.4f, 1f, 0.84f, 1f));
Debug.Log ("0.4, 1f, 0.84: " + color);
Debug.Log ("164,82,84 .... 0.643137f, 0.321568f, 0.329411f :" +
ToColor (new HSBColor (new Color (0.643137f, 0.321568f, 0.329411f))));
}
