ok, thanks roman.
the Reorient_Trans does everything well with
settings like R_T(y*1,vec2-vec1) which should somehow
respond to the things i read in the doc about it, when i want
to align an circle on X/Z perp. to the axis of vec1/vec2.
ok, what i don't see is the math thats behind it. i can't figure
it out from the macro in transforms.inc, mainly because i don't
know what parameters the matrix transform uses. in the docs i only
found a helpscreen saying matrix takes 12 parameters, that's what
i can see from the macro. but i don't see what they mean.
    obviously the Reorient_Trans can only be used inside an object
statement and not for vectors because of the transform {} block.
im still wondering what the macro really does--mathematically, or
how this is called in general.
thanks a lot anyway. wouldnt had found this step.

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