public ColorHsl Add(double h, double s, double l)
{
double newH = ColorConversionUtils.NormalizeHue(this._h + h);
double newS = ColorConversionUtils.NormalizeSaturation(this._s + s);
double newL = ColorConversionUtils.NormalizeLightness(this._l + l);
return(new ColorHsl(newH, newS, newL));
}
public ColorHsl(ColorRgb rgb)
{
double maxc = System.Math.Max(rgb.R, System.Math.Max(rgb.G, rgb.B));
double minc = System.Math.Min(rgb.R, System.Math.Min(rgb.G, rgb.B));
double delta = maxc - minc;
double l = (maxc + minc) / 2.0;
double h = double.NaN;
double s = double.NaN;
// Handle case for r,g,b all have the same value
if (maxc == minc)
{
// Black, White, or some shade of Gray -> No Chroma
this._alpha = rgb.Alpha;
this._h = double.NaN;
this._s = double.NaN;
this._l = l;
return;
}
// At this stage, we know R,G,B are not all set to the same value - i.e. there Chroma
if (l < 0.5)
{
s = delta / (maxc + minc);
}
else
{
s = delta / (2.0 - maxc - minc);
}
double rc = (((maxc - rgb.R) / 6.0) + (delta / 2.0)) / delta;
double gc = (((maxc - rgb.G) / 6.0) + (delta / 2.0)) / delta;
double bc = (((maxc - rgb.B) / 6.0) + (delta / 2.0)) / delta;
h = 0.0;
if (rgb.R == maxc)
{
h = bc - gc;
}
else if (rgb.G == maxc)
{
h = (1.0 / 3.0) + rc - bc;
}
else if (rgb.B == maxc)
{
h = (2.0 / 3.0) + gc - rc;
}
h = ColorConversionUtils.NormalizeHue(h);
this._alpha = rgb.Alpha;
this._h = h;
this._s = s;
this._l = l;
}
public ColorHsv(ColorRgb rgb)
{
double maxc = System.Math.Max(rgb.R, System.Math.Max(rgb.G, rgb.B));
double minc = System.Math.Min(rgb.R, System.Math.Min(rgb.G, rgb.B));
double h = double.NaN;
double s = double.NaN;
double v = double.NaN;
// Handle case for r,g,b all have the same value
if (maxc == minc)
{
// Black, White, or some shade of Gray -> No Chroma
this._alpha = rgb.Alpha;
this._h = double.NaN;
this._s = double.NaN;
this._v = maxc;
return;
}
// At this stage, we know R,G,B are not all set to the same value - i.e. there is Chromatic data
double delta = maxc - minc;
s = delta / maxc;
v = maxc;
if (rgb.R == maxc)
{
h = 0.0 + ((rgb.G - rgb.B) / delta);
}
else if (rgb.G == maxc)
{
h = 2.0 + ((rgb.B - rgb.R) / delta);
}
else
{
h = 4.0 + ((rgb.R - rgb.G) / delta);
}
h = ColorConversionUtils.NormalizeHue(h / 6.0);
this._alpha = rgb.Alpha;
this._h = h;
this._s = s;
this._v = v;
}
private static double hue_2_rgb(double m1, double m2, double h)
{
h = ColorConversionUtils.NormalizeHue(h);
if ((6.0 * h) < 1.0)
{
return(m1 + (m2 - m1) * 6.0 * h);
}
if ((2.0 * h) < 1.0)
{
return(m2);
}
if ((3.0 * h) < 2.0)
{
return(m1 + (m2 - m1) * ((2.0 / 3.0) - h) * 6.0);
}
return(m1);
}