private void Single_HslHsvHsl(HSLColor color)
{
float h, s, v;
color.ToHSV(out h, out s, out v);
var color2 = HSLColor.FromHSV(h, s, v);
color2.a = color.a;
float linv = 1 - color.l;
if (color.l == 1 && color.s != 0)
{
// Conversion to HSV necessarily requires that HSV.s==1.
// Saturation won't be able to round-trip exactly.
AssertNearlyEqualHSL(color, color2);
}
else if (linv < 3e-4f)
{
// And when l is nearly 1, the saturation calculation starts
// getting numerically unstable.
AssertNearlyEqualHSL(color, color2);
}
else
{
AssertNearlyEqualHSLStrict(color, color2);
}
}
/// Returns true on success, false on failure.
/// Failure cases are guaranteed to be identical to the failure cases of RawValueToColor
/// Use if converting raw -> Color is lossy; otherwise, use RawValueToColor
/// HDR color pickers might disallow conversion to HSL.
static bool RawValueToHSLColor(ColorPickerMode mode, Vector3 raw, out HSLColor color)
{
const float EPSILON = 1e-5f;
switch (mode)
{
case ColorPickerMode.SV_H_Rect:
color = HSLColor.FromHSV(raw.z * HSLColor.HUE_MAX, raw.x, raw.y);
return(true);
case ColorPickerMode.HS_L_Polar:
{
var position = new Vector2(raw.x - 0.5f, raw.y - 0.5f) * 2;
var radius = position.magnitude;
color = new HSLColor();
if (radius > 1)
{
if (radius > 1 + EPSILON)
{
return(false);
}
else
{
radius = 1;
}
}
// x direction is 0 degrees (red)
color.HueDegrees = Mathf.Atan2(position.y, position.x) * Mathf.Rad2Deg;
color.s = radius;
color.l = raw.z;
color.a = 1;
return(true);
}
case ColorPickerMode.SL_H_Triangle:
{
color.h = 0; // assigned later
color.l = raw.y;
float maxChroma = SQRT3 * ((color.l < .5f) ? color.l : (1 - color.l));
color.s = (maxChroma == 0) ? 0 : raw.x / maxChroma;
color.a = 1;
color.Hue01 = raw.z;
return(0 <= raw.x && raw.x <= maxChroma);
}
case ColorPickerMode.HL_S_Polar:
{
var position = new Vector2(raw.x - 0.5f, raw.y - 0.5f) * 2;
var radius = position.magnitude;
color = new HSLColor();
if (radius > 1)
{
if (radius > 1 + EPSILON)
{
return(false);
}
else
{
radius = 1;
}
}
color.HueDegrees = Mathf.Atan2(position.y, position.x) * Mathf.Rad2Deg;
color.l = 1 - radius;
color.s = 1 - raw.z;
color.a = 1;
return(true);
}
case ColorPickerMode.HS_LogV_Polar:
throw new InvalidOperationException("This is a HDR mode");
default:
Debug.Assert(false);
color = new HSLColor();
return(false);
}
}