Spheres
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Up Colour Spline HSL HSV Mixers Shaders

The Glass and Pearl methods return smoothly changing shades that add glass-like or pearlescent finishes to a base-colour. Their use isn't exactly obvious, so start by playing with the following code. The jagged circle edge can be antialiased using the gFilters::Antialias method.

Glass
Pearl 

void SphereShader(WORD X, WORD Y, WORD r, gColor Shade, bool Shiny) {
  gColor Color;
  for(int x=-r; x<=r; ++x) {
    WORD cx=WORD(X+x);
    for(int y=-r; y<=r; ++y) {
      if(Shiny) Color=Shade.GetGlassColor(double(x)/r, double(y)/r);
      else      Color=Shade.GetPearlColor(double(x)/r, double(y)/r);
      Color.SetA(gFilters::Antialias(x*x + y*y, r*r, 3.5*r));
      SetPixel(cx, WORD(Y+y), Color.GetRGBA());
  } }
}
SetPixel is a member of CPixelBlock which was used as a base class.
The following image shows a gold ButtonStencil with a red sphere which could be used as a slider control: Slider with Gold Metallic Finish

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