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Re^3: Check if line is straight

by lidden (Curate)
on May 16, 2011 at 23:13 UTC ( #905169=note: print w/ replies, xml ) Need Help??


in reply to Re^2: Check if line is straight
in thread Check if line is straight

return abs(($x2-$x1)*($y-$y1)-($x-$x1)*($y2-$y1)) < $tolerance;

Update added abs()


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