Collada model Bounding box

[gaitat]

As per issue #1843 I have modified the webgl_loader_collada.html example to draw the model bounding box but it does not work.
You can pick up my example from www.virtuality.gr/webgl_loader_collada_bbox.html and place it in the examples folder, so the library paths can be found). If you zoom out you will see the computed bounding boxes and on the console you can see the bounding box values.

[mrdoob]

Yes. There are some additional issues there. If you try loading monster.dae on the editor you'll see that the boundingbox is wrong already.

[gaitat]

OK but I think it should be marked as a bug rather than an enhancement. It is existing code that does not work.

[mrdoob]

Fair point. Changed.

So, I think one of the problems is that ColladaLoader doesn't convert the geometry to our coordinate system, instead it rotates the object.

I'm not sure if this is what it's interfering with the boundingbox though. Maybe it's the bones to morphhtargets code instead.