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Given two planes, P1 and P2, I would like to determine their line of intersection L. I know three points that lie on each plane: (p1, p2, p3) for P1, and (q1, q2, q3) for P2.

Based on what I am doing (triangle collision detection in 3D) it would be convenient to have L defined as a direction vector and a point.

Thank you.

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# Determining the line intersecting two planes

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