[Bf-committers] For render exporters

[Alfredo de Greef]

Hi Ramon, this was in fact exactly how I did it in the
early versions of the yafray export code, but as Ton
pointed out, it pollutes blender code too much, yafray
or other external render code shouldn't be mixed with
blender code. As is most of the code still is now,
yafray related code is all over the place in
blender...
To remedy that a bit, I removed the identity transform
hack (already two years ago now...) so that the export
code itself now has to take care of the correct
transform.

Actually, if you wanted to, you could bypass all that
and use all data as is (I think, not so sure anymore,
was long ago I tried that), and export a fixed camera
at the origin, renderman style.

Anyway, all this is why a separate dedicated external
render api really is needed, which I suppose would
take  care of such things maybe by flags set up by the
external renderer to skip transforms, bypass
subdivision, displacement, object instancing, etc..

Alfredo


--- Ramon Carlos Ruiz <ramoncarlosruiz at gmail.com>
wrote:

> Hi all , This may not be very useful but I was doing
> some clean up to my
> povray exporter and I realize that for use normals
> from VLR_list I have to
> do a mult. operation with matrix (the same as the
> coordinates co) and then
> normalize so what if I do not need to do any matrix
> operation not even in
> the co, that will be better so I track the source of
> my  problems to the
> convertblender.c in the init_render_mesh and I put a
> small condition after
> the matrix assignation in the mat and imat variable
> and put something like
> 
> if (re->r.renderer==R_POVRAY){
>         Mat4One(mat);
>         MTC_Mat4Invert(imat, mat);
> }
> 
> same thing in render_static_particle_system and
> init_render_mball functions
> 
> so no more matrix operation on the exporter side in
> the mesh area. The same
> thing could be done for yafray. I know that the
> multiplication of the matrix
> and the re-normalize of the n is not very time
> consuming but why doit if we
> can skip it ;).
> 
> Un Saludo
> RCRuiz
> > _______________________________________________
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>
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> 


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