If all we had were straight line moves, we would still be able to do some good work with our CNC machines. That's just as well, because the straight line move is all we have. But it's surprising where straight lines can take you. Remember that the control software, and the NIST core within that, can make the Controlled Point (CP) travel in a straight line between any two points. A line is fine, and if we combine a sequence of moves we can travel around a square path. If we do a bit of trigonometry, we can use straight lines to travel around the periphery of any polygon. A polygon simply means a shape with many corners, and in a regular polygon the sides are all the same length and the angles are all the same.
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