[PD] exporting opengl as vector

[Py Fave]

i'm getting a bit off topic,
but can blender do this kind of thing?

-video input >> shader >>distortion of wireframe >>perspective>>svg file ?

2016-02-04 9:19 GMT+01:00 Py Fave <pyfave at gmail.com>:

> 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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