protected override CorsairColor GetColorAtPoint(RectangleF rectangle, BrushRenderTarget renderTarget)
{
if(Gradient == null) return CorsairColor.Transparent;
PointF centerPoint = new PointF(rectangle.X + rectangle.Width * Center.X, rectangle.Y + rectangle.Height * Center.Y);
// Calculate the distance to the farthest point from the center as reference (this has to be a corner)
// ReSharper disable once RedundantCast - never trust this ...
float refDistance = (float)Math.Max(Math.Max(Math.Max(GradientHelper.CalculateDistance(rectangle.Location, centerPoint),
GradientHelper.CalculateDistance(new PointF(rectangle.X + rectangle.Width, rectangle.Y), centerPoint)),
GradientHelper.CalculateDistance(new PointF(rectangle.X, rectangle.Y + rectangle.Height), centerPoint)),
GradientHelper.CalculateDistance(new PointF(rectangle.X + rectangle.Width, rectangle.Y + rectangle.Height), centerPoint));
float distance = GradientHelper.CalculateDistance(renderTarget.Point, centerPoint);
float offset = distance / refDistance;
return Gradient.GetColor(offset);
}