Tom Melly <tom### [at] tomandlucouk> wrote in message
news:3a7e7b74$1@news.povray.org...
> I came across this one the other day (don't know how I'd missed this
> "feature" before).
>
> Basically, I expected the two following rotations to be identical:
>
> rotate y * - 45 + 45
> rotate y * (- 45 + 45)
>

I would guess that pov is doing the multiplication first then adding
45.  Hence it's doing rotate <0,-45,0> + 45.
whereas the brackets in the second force pov
to evaluate the -45+45 first and multiply with y second.

Gail
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