//
// Set color from RGBA values
//
public void FromRGBA(double rv, double gv, double bv, double av)
{
// clamp all values to correct range
r = Math.Min(1.0f, Math.Max(0.0, rv));
g = Math.Min(1.0f, Math.Max(0.0, gv));
b = Math.Min(1.0f, Math.Max(0.0, bv));
a = Math.Min(1.0f, Math.Max(0.0, av));
// calculate new HSL values
RgbaHls.RGB2HSL(r, g, b, ref h, ref s, ref l);
}
