private void BuildWheel()
{
var width = 1024;
var height = width;
var cx = width / 2;
var cy = height / 2;
var colors = new int[width * height];
var gray = Colors.Gray.ToBgr32();
for (int index = 0; index < colors.Length; index++)
{
colors[index] = gray;
}
var radius = cx;
var radiusSquared = radius * radius;
for (int i = 0; i < height; i++)
{
for (int j = 0; j < width; j++)
{
var x = j - cx;
var y = i - cy;
var distanceSquared = (double)x * x + y * y;
if (distanceSquared <= radiusSquared) // In circle
{
var h = Math.Atan2(x, y).ToDegrees() + 180.0d; // Angle
var s = 1.0d;
var l = (1.0d - ((1.0d / radiusSquared) * distanceSquared)); // 1 - (distance normalized)
var hsl = new HSL((float)h, (float)s, (float)l);
var rgb = RGB.FromHsl(hsl.H, hsl.S, hsl.L);
colors[i * width + j] = rgb.R << 16 | rgb.G << 8 | rgb.B;
}
}
}
var bitmap = new WriteableBitmap(width, height, 96, 96, PixelFormats.Bgr32, null);
bitmap.WritePixels(new Int32Rect(0, 0, width, height), colors, width * 4, 0);
image.Source = bitmap;
}
public bool Equals(HSL other)
{
return(other._h.Equals(_h) && other._l.Equals(_l) &&
other._s.Equals(_s));
}