"Bald Eagle" <cre### [at] netscapenet> wrote:
>
> Yes, our left-handed coordinate system can drive people crazy at times.
>

Yeah, *that* topic probably needs a fresh-discussion thread of its own, just as
a 'refresher course.'

But as it impacts STL conversion: All of the STL files I've worked with recently
follow the 'right-hand rule'-- the +x direction faces LEFT rather than to the
right as in POV-ray. (Another 3D-printing standard, apparently.) So STL-to-mesh
conversions have to be mirror-flipped in x to render correctly for us. In my own
code, I simply scaled the final mesh by <-1,1,1>.

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