/// <summary>
/// Converts an RGB color to an HSV color
/// </summary>
/// <param name="r">Red</param>
/// <param name="b">Blue</param>
/// <param name="g">Green</param>
/// <returns>A HsvColor object.</returns>
public static HsvColor ConvertRgbToHsv(int r, int b, int g)
{
double h = 0, s;
double min = Math.Min(Math.Min(r, g), b);
double v = Math.Max(Math.Max(r, g), b);
double delta = v - min;
if (v == 0.0)
{
s = 0;
}
else
s = delta / v;
if (s == 0)
h = 0.0;
else
{
if (r == v)
h = (g - b) / delta;
else if (g == v)
h = 2 + (b - r) / delta;
else if (b == v)
h = 4 + (r - g) / delta;
h *= 60;
if (h < 0.0)
h = h + 360;
}
var hsvColor = new HsvColor();
hsvColor.H = h;
hsvColor.S = s;
hsvColor.V = v / 255;
return hsvColor;
}
private void DetermineColor(Point p)
{
var hsv = new HsvColor(360 - ColorSlider.Value, 1, 1);
hsv.S = p.X;
hsv.V = 1 - p.Y;
SelectedColor = ColorUtilities.ConvertHsvToRgb(hsv.H, hsv.S, hsv.V, SelectedColor.A);
CurrentColor.Background = new SolidColorBrush(SelectedColor);
#region Update TextBoxes
_isUpdating = true;
AlphaText.Value = SelectedColor.A;
RedTextBox.Value = SelectedColor.R;
GreenText.Value = SelectedColor.G;
BlueText.Value = SelectedColor.B;
HexadecimalText.Text = SelectedColor.ToString();
_isUpdating = false;
#endregion
}
/// <summary>
/// Converts an RGB color to an HSV color
/// </summary>
/// <param name="color">Color</param>
/// <returns>A HsvColor object.</returns>
public static HsvColor ConvertRgbToHsv(this Color color)
{
double h = 0, s;
double min = Math.Min(Math.Min(color.R, color.G), color.B);
double v = Math.Max(Math.Max(color.R, color.G), color.B);
double delta = v - min;
if (v == 0.0)
{
s = 0;
}
else
s = delta / v;
if (s == 0)
h = 0.0;
else
{
if (color.R == v)
h = (color.G - color.B) / delta;
else if (color.G == v)
h = 2 + (color.B - color.R) / delta;
else if (color.B == v)
h = 4 + (color.R - color.G) / delta;
h *= 60;
if (h < 0.0)
h = h + 360;
}
var hsvColor = new HsvColor();
hsvColor.H = h;
hsvColor.S = s;
hsvColor.V = v / 255;
return hsvColor;
}
