private void OnGUI()
{
PrepareStyles();
UpdatePickerCoordinates();
EditorGUI.BeginChangeCheck();
EditorGUI.BeginChangeCheck();
colourModel = (Colour.Model)EditorGUILayout.Popup("Colour Space", (int)colourModel, System.Enum.GetNames(typeof(Colour.Model)));
sliderAxis = (SliderAxis)EditorGUILayout.Popup("Slider Axis", (int)sliderAxis, System.Enum.GetNames(typeof(SliderAxis)));
workingSpace = (Colour.RGBSpace)EditorGUILayout.Popup("Working Colour Space", (int)workingSpace, System.Enum.GetNames(typeof(Colour.RGBSpace)));
if (EditorGUI.EndChangeCheck())
{
Double3 newPickFrac = GetPickerCoords(currentColourXYZ, colourModel, workingSpace);
Double3 pick = newPickFrac * maxValue;
pickerCoords = new Int4(Mathf.RoundToInt((float)pick.x), Mathf.RoundToInt((float)pick.y), Mathf.RoundToInt((float)pick.z), pickerCoords.w);
}
limitingSpace = (Colour.RGBSpace)EditorGUILayout.Popup("Limiting Colour Space", (int)limitingSpace, System.Enum.GetNames(typeof(Colour.RGBSpace)));
if (EditorGUI.EndChangeCheck())
{
pickerOutOfDate = sliderOutOfDate = true;
}
EditorGUILayout.Space();
EditorGUILayout.ColorField(currentColourRGB);
minSize = maxSize = new Vector2(textureSize + 60, textureSize + 280);
UpdateTextures();
GUI.DrawTexture(pickerRect, pickerTexture, ScaleMode.StretchToFill);
GUI.DrawTexture(sliderRect, sliderTexture, ScaleMode.StretchToFill);
for (int i = 0; i < altSliders; ++i)
GUI.DrawTexture(sliderGroupRect[i], sliderGroupTexture[i], ScaleMode.StretchToFill);
int circleSize = 8;
int halfCircleSize = 4;
if (Event.current.type == EventType.Repaint)
{
pickerBox.Draw(pickerRect, GUIContent.none, 0);
pickerBox.Draw(sliderRect, GUIContent.none, 0);
pickerCircle.Draw(new Rect(pickerCoords.x + 10 - halfCircleSize, ((textureSize - 1) - (pickerCoords.y)) + 120 - halfCircleSize, circleSize, circleSize), GUIContent.none, 0);
sliderVertArrow.Draw(new Rect(textureSize + 18, (textureSize - 1) - (pickerCoords.z) + 117, 34, 8), GUIContent.none, 0);
for (int i = 0; i < altSliders; ++i)
{
sliderHorizArrow.Draw(new Rect(pickerCoords[i] + 7, sliderGroupRect[i].yMin - 4, 16, 28), GUIContent.none, 0);
pickerBox.Draw(sliderGroupRect[i], GUIContent.none, 0);
}
}
Double4 pickerPosFraction = pickerCoords / maxValue;
if (pickerOutOfDate == true || sliderOutOfDate == true)
{
Double4 arrangement = GetPickerArrangement(sliderAxis, pickerPosFraction);
Colour pickedColour = GetWorkingSpaceColour(colourModel, workingSpace, arrangement);
if (Colour.IsInsideGamut(pickedColour, limitingSpace))
{
currentColourXYZ = pickedColour;
currentColourRGB = (Color)Colour.To_RGB(pickedColour, workingSpace);
}
else
{
currentColourXYZ = new Colour(Double3.zero);
currentColourRGB = Color.black;
}
}
currentColourRGB.a = (float)pickerPosFraction.w;
Repaint();
pickerOutOfDate = sliderOutOfDate = false;
}
private static Double3 GetPickerCoords(Colour col, Colour.Model newModel, Colour.RGBSpace workingSpace)
{
Double3 coords = Double3.zero;
if (newModel == Colour.Model.RGB)
coords = Colour.To_RGB(col, workingSpace);
else if (newModel == Colour.Model.xyY)
coords = Colour.To_xyY(col);
else if (newModel == Colour.Model.HSL)
coords = Colour.To_HSL(col, workingSpace);
else if (newModel == Colour.Model.HSV)
coords = Colour.To_HSV(col, workingSpace);
else if (newModel == Colour.Model.XYZ)
coords = new Double3(col.X, col.Y, col.Z);
else if (newModel == Colour.Model.Lab)
coords = Colour.To_Lab(col);
//else if (originalModel == Colour.Model.LCH)
//workingSpaceColour = Colour.From_LCH((Double3)arrangement);
return coords;
}
private static Colour GetWorkingSpaceColour(Colour.Model originalModel, Colour.RGBSpace workingSpace, Double4 arrangement)
{
Colour workingSpaceColour = new Colour(Double3.zero);
if (originalModel == Colour.Model.RGB)
workingSpaceColour = Colour.From_RGB((Double3)arrangement, workingSpace);
else if (originalModel == Colour.Model.xyY)
workingSpaceColour = Colour.From_xyY((Double3)arrangement);
else if (originalModel == Colour.Model.HSL)
workingSpaceColour = Colour.From_HSL((Double3)arrangement, workingSpace);
else if (originalModel == Colour.Model.HSV)
workingSpaceColour = Colour.From_HSV((Double3)arrangement, workingSpace);
else if (originalModel == Colour.Model.XYZ)
workingSpaceColour = new Colour((Double3)arrangement);
else if (originalModel == Colour.Model.Lab)
workingSpaceColour = Colour.From_Lab((Double3)arrangement);
//else if (originalModel == Colour.Model.LCH)
//workingSpaceColour = Colour.From_LCH((Double3)arrangement);
return workingSpaceColour;
}
public static Double3 To_RGB(Colour col, RGBSpace space)
{
RGBDefinition d = rgbSpaces[space];
Double3 linear = d.fromXYZ * col.val;
return Mathd.Pow(linear, 1.0 / d.gamma);
}
public static Double3 To_xyY(Colour col)
{
return new Double3(col.X / (col.X + col.Y + col.Z), col.Y / (col.X + col.Y + col.Z), col.Y);
}
public static Double3 To_Lab(Colour col)
{
Double3 lab = new Double3();
Double3 w = new Double3(95.047, 100.000, 108.883);
System.Func<double, double> f = new System.Func<double, double>((x) =>
{
if (x > Mathd.Pow(6.0 / 29.0, 3))
return Mathd.Pow(x, (1.0 / 3.0));
else
return ((1.0 / 3.0) * Mathd.Pow(29.0 / 6.0, 2.0) * x) + (4.0 / 29.0);
});
lab.x = (166.0 * f(col.Y / w.y)) - 16;
lab.y = 500.0 * (f(col.X / w.x) - f(col.Y / w.y));
lab.z = 200.0 * (f(col.Y / w.y) - f(col.Z / w.z));
lab.x = (lab.x + 15) * (1.0 / 30.0);
lab.y = (lab.y + 30) * (1.0 / 50.0);
lab.z = (lab.z + 30) * (1.0 / 50.0);
return lab;
}
public static Double3 To_HSV(Colour col, RGBSpace space)
{
Double3 hsv;
Double3 rgb = To_RGB(col, space);
double min = Mathd.Min(rgb.x, rgb.y, rgb.z);
double max = Mathd.Max(rgb.x, rgb.y, rgb.z);
double delta = max - min;
if (max == 0)
{
return new Double3(0, 0, 0);
}
hsv.y = delta / max;
hsv.z = max;
if (rgb.x == max)
hsv.x = (rgb.y - rgb.z) / delta;
else if (rgb.y == max)
hsv.x = 2 + (rgb.z - rgb.x) / delta;
else
hsv.x = 4 + (rgb.x - rgb.y) / delta;
hsv.x *= 60;
if (hsv.x < 0)
hsv.x += 360;
return hsv;
}
public static Double3 To_HSL(Colour col, RGBSpace space)
{
Double3 hsl;
Double3 rgb = To_RGB(col, space);
double min = Mathd.Min(rgb.x, rgb.y, rgb.z);
double max = Mathd.Max(rgb.x, rgb.y, rgb.z);
double delta = max - min;
hsl.z = max - min / 2.0;
if (delta == 0)
{
hsl.x = 0;
hsl.y = 0;
return hsl;
}
if (rgb.x == max)
hsl.x = (rgb.y - rgb.z) / delta;
else if (rgb.y == max)
hsl.x = 2 + (rgb.z - rgb.x) / delta;
else
hsl.x = 4 + (rgb.x - rgb.y) / delta;
hsl.x *= 60;
if (hsl.x < 0)
hsl.x += 360;
hsl.y = delta / (1 - (Mathd.Abs((2.0 * hsl.z) - 1)));
return hsl;
}
public static bool IsInsideGamut(Colour currentColour, RGBSpace limitingSpace)
{
Double3 limitingGamutColour = To_RGB(currentColour, limitingSpace);
if (limitingGamutColour.MaxVal > 1.0 || limitingGamutColour.MinVal < 0.0 || double.IsNaN(limitingGamutColour.x) || double.IsNaN(limitingGamutColour.y) || double.IsNaN(limitingGamutColour.z))
return false;
return true;
}
public static Colour From_Lab(Double3 lab)
{
lab.x = (lab.x * 30) - 15;
lab.y = (lab.y * 60) - 30;
lab.z = (lab.z * 60) - 30;
Colour col = new Colour();
Double3 w = new Double3(95.047, 100.000, 108.883);
System.Func<double, double> f = new System.Func<double, double>((x) =>
{
if (x > Mathd.Pow(6.0 / 29.0, 3.0))
return Mathd.Pow(x, 3.0);
else
return 3.0 * Mathd.Pow(6.0 / 29.0, 2.0) * (x - (4.0 / 29.0));
});
col.X = w.x * f(((1.0 / 116.0) * (lab.x + 16)) + ((1.0 / 500.0) * lab.y));
col.Y = w.y * f((1.0 / 116.0) * (lab.x + 16));
col.Z = w.z * f(((1.0 / 116.0) * (lab.x + 16)) - ((1.0 / 200.0) * lab.z));
return col;
}
