public bool Overlaps(Rect r)
{
// pre-calculate left, bottom, right, top of this and right rect
double tl = x, tb = y, tr = x+width, tt = y+height;
double rl = r.x, rb = r.y, rr = r.x+r.width, rt = r.y+r.height;
if ((tl > rr) || (tr < rl) || (tt < rb) || (tb > rt))
return false;
else return true;
/* stupid old code
if (tl <= rl && tb <= rb && tr >= rr && tt >= rt) {
// r is fully contained in this rectangle
return true;
}
else if (tl >= rl && tb >= rb && tr <= rr && tt <= rt) {
// this rectangle is fully contained in r
return true;
}
else if (((rl >= tl && rl <= tr) || (rr >= tl && rr <= tr)) && ((rb >= tb && rb <= tt) || (rt >= tb && rt <= tt))) {
return true;
}
return false;
*/
}
public static Rect Union(Rect l, Rect r)
{
double left = Math.Min(l.x, r.x);
double right = Math.Max(l.Right, r.Right);
double bottom = Math.Min(l.y, r.y);
double top = Math.Max(l.Top, r.Top);
return new Rect(left, bottom, right-left, top-bottom);
}