[PD] exporting opengl as vector

[Py Fave]

i see it's not easy :-)

because i want to get object's wireframe  at the end.

(from the viewpoint perspective , not as 3d)
svg export more than obj

and more or less real time
i mean in a fast way

if it'not work for gem,
do you know any other tools exporting a 3d scene to (flat )vectors?

Thanks for your help!


py






2016-02-03 23:36 GMT+01:00 Jack <jack at rybn.org>:

> I think, a loop like this should be doable (not sure, expert on shader
> can help) ? :
> Your coord vertices -> convert to RGB colors on fragment -> frame buffer
>  as texture -> get your new color on vertices from texture (with shader).
> You will need to grab back texture on each frame if you want to get
> 'real' value from texture.
> But as Cyrille explain, it will not easy to get the geometry of the "3D
> object" which need to know how to draw from your vertices (maybe doable
> with an other texture :).
> ++
>
> Jack
>
>
>
> Le 03/02/2016 23:18, Jack a écrit :
> > Le 03/02/2016 17:48, cyrille henry a écrit :
> >> hello,
> >>
> >> There are exemple on how to export an obj file made of simple primitive.
> >> (in Gem exemple directory 11.obj_exporter). But it will not work with
> >> shaders.
> >>
> >>
> >> since shader are computed in the graphic card, it's not easy to import a
> >> geometry back to the CPU.
> >>
> >> but you can use your algorythm to draw an image that represent the 3D
> >> vector (XYZ as RGB), and get the image back.
> >> Then you can convert the image in a obj file.
> >
> > I was thinking about this point with texture.
> > ++
> >
> > Jack
> >
> >
> >>
> >> cheers
> >> c
> >>
> >>
> >> Le 03/02/2016 17:33, Py Fave a écrit :
> >>> Hello list,
> >>>D
> >>>
> >>> is it possible to export the result of a gem window as vectors?
> >>>
> >>> i am doing the classical plane 3d extrusion (via a shader)
> >>> but need vectors as output
> >>>
> >>> 2d vector(prefered ) or 3d model
> >>> what would work ?
> >>> any hint welcome!
> >>>
> >>>
> >>> i saw it was already asked a long time ago.
> >>> any news in this area.?
> >>>
> >>>
> >>> Do you know other programs to do that ?
> >>>
> >>> Thanks by advance
> >>>
> >>> Have fun !
> >>>
> >>> Pierre-Yves
> >>>
> >>>
> >>>
> >>>
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