For the cylinder sphere part there is an article from JGT about Point
Cylinder Distance (with code)
see http://www.acm.org/jgt/papers/BarbierGalin04/
[snip]
I'll check and see how it performs.
These seems to be working perfectly. Note that is that the Cylinder::R()
returns the squared distance, which is not obvious from the documentation.
Regards,
/Marcus
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