public static bool RectanglesOverlap(Int2 topLeft0, Int2 size0, Int2 topLeft1, Int2 size1)
{
DebugEx.Assert(size0.X >= 0 && size0.Y >= 0);
DebugEx.Assert(size1.X >= 0 && size1.Y >= 0);
var topRight0 = topLeft0 + new Int2(Math.Max(size0.X - 1, 0), 0);
var bottomRight0 = topLeft0 + Int2.ComponentMax(new Int2(), size0 - new Int2(1, 1));
var topRight1 = topLeft1 + new Int2(Math.Max(size1.X - 1, 0), 0);
var bottomRight1 = topLeft1 + Int2.ComponentMax(new Int2(), size1 - new Int2(1, 1));
return(PointInRectangle(topLeft0, size0, topLeft1) ||
PointInRectangle(topLeft0, size0, topRight1) ||
PointInRectangle(topLeft0, size0, bottomRight1) ||
PointInRectangle(topLeft1, size1, topLeft0) ||
PointInRectangle(topLeft1, size1, topRight0) ||
PointInRectangle(topLeft1, size1, bottomRight0));
}