in reply to Re^5: Checking if squares intersect
in thread Checking if squares intersect

Adjacent squares would be side by side, in the above the edge of each square intersect.
So x2=x3 means that the edge of one square intersects with the edge of the other...

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Re^7: Checking if squares intersect
by ikegami (Patriarch) on Oct 20, 2009 at 01:17 UTC
    From a CS's perspective, at least in the era where I dealt with this, the bot right corner is usually just beyond the square itself.