> I suspect one day I might create a Write() for the model parsers so that I can
> improve the VRML export. In such a case I would also eliminate the Transforms;
> for me there is no point in maintaining transforms unless we support the reuse
> of coordinate lists and vertex indices. At the moment the presence of
> transforms
> only increases processing time of the VRML file.
> - Cirilo
Hi Cirilo,
In my point of view, transforms in models are good and bad. I disagree (for
rendering proposes) that transforms increase processing. Well, it will make the
things easier to code while dealing now with openGL (scale, rotation,
translation). So it make the things at this point easier.
But.. it will make things harder if we need to know the real value (absolute)
for (as I refer before) calculate bounding box or other aspects from the model,
because it will need to apply all the transformations with C math (as opposite
to use openGL math functions) to get that vertices transformed and processed in
CPU.
I don't know much about the VRML exporter. I notice that it in some part is
just adding an URL/Link to an external file (for the VRML format) (so how it is
apply transformation in that case?)
but I see that it is transforming all vertex in x3d (by the way.. I that
feature must be checked to see if I didn't broke anything related with this
latest additions)
I do believe for exporter it will be also easier to use transformation commands
(scale, rotation, translation) .. expecting that the external 3d software will
support it.
In the best world, transforms are good it will add flexibility as you suggest
to support reuse ("USE" tag in VRML) of models but for full support it will
need some coding work.
As a KiCad user, if I don't want use exporter for CAD proposes but just for
rendering proposes, then, I may prefer other file format model than VRML (maybe
x3d or something more wide support .. as OBJ.. ) and just hard raw mesh (just
vertex, materials, colors ... ) ... one single file.. but at same time, it will
be usefull if we can keep the objects model separated in order if you want to
add different materials.. textures while rendering in a external software.
Regards,
Mario Luzeiro
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