public FilledRegion Apply(FillData data)
{
float OuterCircle = data.BeingFilled.Width * 0.5f;
if (OuterCircle <= InnerCircle)
{
throw new ArgumentOutOfRangeException("The outer radius has to be larger than the inner radius!");
}
Location center = data.BeingFilled.Center;
//Make the circles.
data.FillCircle(true, center, OuterCircle);
data.FillCircle(false, center, InnerCircle);
//Make the lines to get to the inner circle.
data.FillLine(false, center, data.BeingFilled.BottomMid);
data.FillLine(false, center, data.BeingFilled.TopMid);
data.FillLine(false, center, data.BeingFilled.LeftMid);
data.FillLine(false, center, data.BeingFilled.RightMid);
//For spawn points, give the two points just to the left/right of the inner circle.
return(new CircleRegion(data.BeingFilled, InnerCircle));
}