[PD] Geo absolute position

Roman Haefeli reduzierer at yahoo.de
Wed May 9 16:00:54 CEST 2007

hi alain

because of the same problem, i wrote a small collection of vector
processing abstractions. instead of using several [translateXYZ] and
[rotateXYZ] objects in one chain, i decided to only use one
[translateXYZ] for the position of the geo and one [rotatateXYZ] for its
orientation. for calculating the the positions and orientations, i used
the abstractions, i mentioned above. it seems awkard to have to compute
all that stuff yourself, since there are object, that should make life
easier, but i din't find any better way to overcome that problem yet.

you can find the abstractions here:

On Wed, 2007-05-09 at 09:25 -0400, nosehair911 at bellsouth.net wrote:
> I have been looking for this answer for a while now.  In Gem, is there a way to get the absolute 
> position of a geo after its been rotated, moved, rotated again, etc...?
> For example:
> [gemhead]
> |
> [translateXYZ 0 1 0]
> |
> [rotateXYZ 0 0 90]
> |
> [translateXYZ 1 0 0]
> |
> [circle 0.1]
> |
> [absolute position]

i think, it would also be cool to not only know the position, but also
its orientation. further would it be usefull to have some
angel-to-vector conversion, so that an orientation given in angles would
be outputted as the three vectors rotated by these angles. 


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