Might be off topic, but can we map 3-d space to detect obstacles like how a roomba maps 2-d space and avoids obstacles ? (like this <a href="http:&#x2F;&#x2F;www.technologyreview.com&#x2F;sites&#x2F;default&#x2F;files&#x2F;images&#x2F;iRobot_Newsx299.gif" rel="nofollow">http:&#x2F;&#x2F;www.technologyreview.com&#x2F;sites&#x2F;default&#x2F;files&#x2F;images&#x2F;i...</a>)<p>I mean, is that a solved problem ?