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catmull rom

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# Creating a Catmull-Rom curve from three points
Much shorter than the previous section: we saw that Catmull-Rom curves need at least 4 points to draw anything sensible, so how do we create a Catmull-Rom curve from three points?
Short and sweet: we don't.
We run through the maths that lets us [create a cubic Bézier curve](pointcurves), and then convert its coordinates to Catmull-Rom form using the conversion formulae we saw above.