public static bool CheckOverlap(Shape2D shape1, Shape2D shape2)
{
ShapeTypes2D type1 = shape1.ShapeType;
ShapeTypes2D type2 = shape2.ShapeType;
// TODO: Handle point-point intersections.
if (type1 == ShapeTypes2D.Point)
{
return(shape2.Contains(shape1.Position));
}
if (type2 == ShapeTypes2D.Point)
{
return(shape1.Contains(shape2.Position));
}
// By ensuring that the second shape sorts after the first (as far as shape type), the total number of
// switch cases can be lowered.
if ((int)type1 > (int)type2)
{
Shape2D temp = shape1;
shape1 = shape2;
shape2 = temp;
}
switch (type1)
{
case ShapeTypes2D.Arc: return(CheckOverlap((Arc)shape1, shape2));
case ShapeTypes2D.Circle: return(CheckOverlap((Circle)shape1, shape2));
case ShapeTypes2D.Rectangle: return(CheckOverlap((Rectangle)shape1, (Rectangle)shape2));
}
return(false);
}
protected Shape2D(ShapeTypes2D shapeType)
{
ShapeType = shapeType;
}