Hi, I am trying to determine first if a line and a box (2d, and box is always axis aligned) intersect, and then if they do, where length along the line the intersection is (ie, the distance from the start point). Does anyone know a fast way to do this, or is my best bet to treat each of the four sides of the box as line segments and run four line-line intersection tests? Thanks for any ideas, Alan

That''s probably a good idea. If you have line AB and rect QWER, I''d check intersections between AB and QW, AB and WE, AB and ER, and AB and RQ.

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