Re: [Maya2osg-users] Matrix exported does not obey units set in Maya

[Javier T. <jav...@gm...>]

  Hi J-S,

On Thu, Jun 30, 2011 at 1:39 AM, Jean-Sébastien Guay
<jea...@cm...> wrote:
> Hi Javier,
>
>>    What is the difference in configuring meters as the units in Maya
>> configuration instead of just considering that the units are meters no
>> matter what Maya has in its config?
>
> It has an influence when you import files coming from other 3D packages,
> in particular CAD applications. Those file formats generally specify
> which units they are in, and if your own scene is built using
> millimeters (but assuming one unit is a meter) then it won't match the
> imported file.

  Of course, if you're working with models created with different
units/scales, you have to be careful with this.

> But in short, I think we should probably do it right in the plugin,
> because we cannot predict how users will have configured Maya. At the
> very least we can apply a scale at the top of the graph, but I think it
> would be better to export with the configured units, otherwise examining
> the file will be confusing (why is this box 200 meters wide? Oh it's
> really 2 meters wide if I take into account the scale at the root of the
> graph...)

  Of course, doing things correctly is better. The scale at the root
would be fine for me (maybe in the same transform that perform the
Y-up to Z-up conversion), but if you are thinking about better ways,
great.

> I'm not suggesting you do anything about it. I'll work on it. I just
> wanted to know if anyone had encountered this before, and now I know why
> not :-)

  Now you know the reason. I think in the whole Maya2OSG community
there are three people, and only about a 33% of them have a pipeline
complex enough to find these kind of problems  :)


  Cheers!

-- 
Javier Taibo