I am trying to figure out the relationship between the Wavefront .obj format

and matrix that jit.gl.model spits out. It appears that the latter is a

7-plane matrix whose first three planes correspond to xyz, albeit they are

organized so as to form triangles. Hence, I was wondering is there an easier

way (without resorting to writing an .obj parser) to output such data from

the jit.gl.model or some other Max/MSP/Jitter object that converts .obj

points into an xyz matrix, making its inclusion/manipulation/use in

jit.gl.nurbs or other similar matrix-driven scenarios possible?

I am trying to figure out the relationship between the Wavefront .obj format
and matrix that jit.gl.model spits out. It appears that the latter is a
7-plane matrix whose first three planes correspond to xyz, albeit they are
organized so as to form triangles. Hence, I was wondering is there an easier
way (without resorting to writing an .obj parser) to output such data from
the jit.gl.model or some other Max/MSP/Jitter object that converts .obj
points into an xyz matrix, making its inclusion/manipulation/use in
jit.gl.nurbs or other similar matrix-driven scenarios possible?

extracting-points-from-a-model-matrix

last year i did it cleaned it by hand with notepad++ searchreplace and some

On Sat, Feb 23, 2008 at 6:34 AM, Ivica Ico Bukvic wrote:

> I am trying to figure out the relationship between the Wavefront .obj

> and matrix that jit.gl.model spits out. It appears that the latter is a

> 7-plane matrix whose first three planes correspond to xyz, albeit they are

> organized so as to form triangles. Hence, I was wondering is there an

> way (without resorting to writing an .obj parser) to output such data from

> the jit.gl.model or some other Max/MSP/Jitter object that converts .obj

> points into an xyz matrix, making its inclusion/manipulation/use in

> jit.gl.nurbs or other similar matrix-driven scenarios possible?

last year i did it cleaned it by hand with notepad++ searchreplace and some
duct tape,
then [text]>dump>setcell >[jit.matrix]
by god it worked.

On Sat, Feb 23, 2008 at 6:34 AM, Ivica Ico Bukvic  wrote:

> Hi all,
>
> I am trying to figure out the relationship between the Wavefront .obj
> format
> and matrix that jit.gl.model spits out. It appears that the latter is a
> 7-plane matrix whose first three planes correspond to xyz, albeit they are
> organized so as to form triangles. Hence, I was wondering is there an
> easier
> way (without resorting to writing an .obj parser) to output such data from
> the jit.gl.model or some other Max/MSP/Jitter object that converts .obj
> points into an xyz matrix, making its inclusion/manipulation/use in
> jit.gl.nurbs or other similar matrix-driven scenarios possible?
>
> Any assistance is most appreciated!
>
> Many thanks!
>
> Ico
>
>

> last year i did it cleaned it by hand with notepad++ searchreplace and 

Thanks for the reply. Ironically, I came to the same conclusion in the past

hour :-). Please see below. You can use it simply as:

And that ought to do it. Optional input takes in "read

NB: The abstraction is not real-time safe as it has been built with the

assumption that this is something you would want to do before running the

show. FWIW, I don't think jit.gl.model is any more real-time safe when it

> last year i did it cleaned it by hand with notepad++ searchreplace and 
> some duct tape, 
> then [text]>dump>setcell >[jit.matrix]
> by god it worked. 

Thanks for the reply. Ironically, I came to the same conclusion in the past
hour :-). Please see below. You can use it simply as: 

And that ought to do it. Optional input takes in "read
somefile.obj>".

NB: The abstraction is not real-time safe as it has been built with the
assumption that this is something you would want to do before running the
show. FWIW, I don't think jit.gl.model is any more real-time safe when it
comes to loading large files.

Do you have a reverse version of this? I'd like to export matrices as .obj files.

extracting points from a model matrix