"Fixed typos in Matrix4's transpose() and getInverse()"

https://github.com/AddictArts/three.js/commit/62d2560b3c7b9868fc25f628c4022448aaff6b00

Bad things (and hard to debug) can happen that affect Ray.

This creates shallow copy of object and its children (geometry and materials are shared, transforms are unique).

Hope so. There is now just a single scene graph update per frame render (plus some extra one-shot updates if light cameras are auto-added to scene graph).

No time right now to re-create the examples using Ray. Will do for r47...

Also fixed RTT example - seems UV mapping for SphereGeometry is now rotated 180 degrees.

Too much caching can break things.

Now uses Face4 where posible.
Adde phiStart, phiLenght, thetaStart and thetaLength as extra parameters (useful for doing google-earth-like stuff).

This will need a rewrite anyway...

UVs are hard indeed.

This is supposed to be more efficient as per Apple OpenGL ES recommendations:

http://developer.apple.com/library/ios/#documentation/3DDrawing/Conceptual/OpenGLES_ProgrammingGuide/TechniquesForWorkingWithTextureData/TechniquesForWorkingWithTextureData.html

Also we have been generating mipmaps twice for render targets.

It was quite a pain - ArrayBuffers / Typed Arrays are fussy about byte alignment - but seems to be worth it.

Parsing times are down (modest gains for small objects / Firefox, bigger gains for large objects / Chrome, performance gains from 10% - 200%).

Also as a positive side effect, changing interleaved face arrays into uniform arrays seems to have helped a bit with gzip compression (about 6% smaller size for gzipped 526K Lucy).

Proper IcosahedronGeometry next...

It makes the whole thing imprecise, but cubes are now properly reflective.

Also manually fixed buffalo model and test scene to be valid JSONs.

Work-in-progress => do not merge yet.

OBJ converter, JSONLoader, BinaryLoader and some examples are done. Still need to do Blender exporter, SceneLoader and more examples.

Advantages:

- faster parse times
- bypass array initializer size limit in Firefox
- no more crashes in Chrome 15 (caused by too many concurrently active workers)

Disadvantages:

- more browser UI freezing
- multiple models tend to appear all at once with the last one (instead of popping up progressively)

And still readable code...

It's enough to clone just for hits, no need to do it for every face.

Removed some clone() calls while still keeping the code somewhat pretty.

So we can set it to lowp for mobile devices if needed.

Not sure what was that supposed to be for, we didn't have a single use case.

Also fixed RTT example, it was affected by unlit Lambert change.

Zombies now look correct.

Though still getting undebuggable random crashes in Chrome with ro.me animals demo :S

Mostly just shuffling code around to have more organized "big picture" view.