**Basic Math – Vectors & Lines**

1*v 1x -t 2 *v 2x L 1y –L 2y= 0 = P 1y-P 2y + t 1*v 1y-t 2 *v 2y L 1z –L 2z= 0 = P 1z-P 2z + t 1*v 1z -t 2 *v 2z where t=(-inf,inf) u=(-inf,inf) Trouble: 3 eqs, 2 unknowns no guaranteed solution. The lines might just intersect, but they do not have to. When they intersect, one of the three eqs cancels out. In other words: a linear ...

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