In this case the slope method is better and simpler than the cross product metho... | Hacker News

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		jules on March 6, 2013 \| parent \| context \| favorite \| on: Breaking down Amazon's mega dropdown In this case the slope method is better and simpler than the cross product method. `def slope(p): return (p.y-oldMouse.y)/(p.x-oldMouse.x) isInRange = slope(menuBottom) <= slope(newMouse) <= slope(menuTop)`

icambron on March 7, 2013 | [–]

My thought too. What are the supposed advantages of using linear algebra for this problem?

Edit: my guess is divide-by-zero conditions.

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