On 10/24/25 05:02, William F Pokorny wrote:
> I think the normalization - including y - is necessary for other reasons 
> like the generation of the polynomials, but I also believe I see your 
> point about what is needed for the initial bounding cylinder check, 
> specifically. I'll try with branch-off code which drops the 'y' 
> component for the initial cylinder test only.
> 

See the attach code excerpt file for what I've settled upon for the 
changes.

> Aside: I'd make a moderate bet this tangled with the issues I had in 
> some rotation about x tests where parts (partial segments/intervals) of 
> the sor would drop out. IIRC, those tests included negative on curve 
> (between end control points, points). We'll see.

Lost my bet here.

Bill P.

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Download 'sorcodeupdate.cpp.txt' (3 KB)