This buggy pattern ("something = parameter || nonzero value") exists at more places though elsewhere setting to zero doesn't make that much sense (e.g. in geometries).

Not sure if we should change it everywhere to proper pattern ("something = ( parameter !== undefined ) ? parameter : value").

Maybe it would be good for establishing habit. I remember fixing this buggy pattern long ago but it just keeps popping up.

Still not very fond of decompose returning new array. We will see when it'll be actually used - as API allows for passing in existing translation, rotation, scale, maybe this return array could be eliminated.

(per Qt API design suggestions http://developer.qt.nokia.com/wiki/API_Design_Principles)

Also some more whitespace cleanup.

Added functions for getPosition(), getColumnX(), getColumnY() and getColumnZ() to easier access the different components of the matrix.

Gah, that was painful. Obvious solution with object.lookAt doesn't work, forward facing direction (heading and attitude) is fine, but banking gets messed up:( Tried many fixes, none worked, so I just resorted to simple rotation around Y-axis based on direction vector.

Added translate( distance, axis ), translateX( distance ), translateY( distance ) and translateZ( distance ) methods to Object3D.
Camera3D translate method overrides Object3D's one. NoFly parameter removed (this should be handled from outside I think).

Object3D::lookAt works! (and Vector3.setRotationFromMatrix too!)

Next: Object3D::translate...

Animation.js - fixed scale bugs and removed flattenToArrayOffset
AnimationHandler.js - fixed so keyframes at same time is removed
Matrix4.lookAt - fixed so it handles situations where z === up and where eye === target
SkinnedMesh.update - added flattenToArrayOffset in end of update

Minor tweaks.

- Wrong in last commit, now the inversion of position is removed

- Changed so it sets an ordinary matrix. Also removed inversion of position, which broke A LOT of the examples.

WebGLRenderer:
- Using camera.matrixWorldInverse instead of camera.matrixWorld
- Changed frustum check to camera.frustumContains( object );
- Moved cameraInverse * matrixWorld to vertex shader (needs testing!) (note: normals not fixed yet!)

Object3D.addChild:
- Recurses up through hierarchy until reaches scene and adds itself to scene.objects/sounds/lights

Camera:
- Changed inverseMatrix -> matrixWorldInverse

I don't remember when was the last time I used them. Current Web Developer Tools do this already for you.

Color::updateRGBA ⟶ Color::updateRGB

Fixed matrix rotation in Projector (not fully done yet, need to implement herarchies still)

Thanks to @mikaelemtinger ;)

Figured out why Canvas/SVG wasn't rendering... someone changed camera.near/far to camera.zNear/zFar :P

- removed unnecessary normal matrix computation in hierarchies (this is already done in renderer)
- removed unnecessary enabling of attribute arrays in every frame (it's enough to do it when shader program is created)
- depth test is now only set if it changed

- getters/setters are no more in Vector3
  - object hierarchies thus don't use "isDirty"
  - this was completely killing performance for anything that was touching a lot of Vector3 like creation of meshes and dynamic buffers
  - even without this, performance of hierarchies went up (a lot)

- objects do not get passed renderer anymore
  - camera was almost also removed, but this is useful for LOD (though there may be some cleaner way to do this?)

- material ids are now unified, this makes "geometry.sortFacesByMaterial" faster (thus scene init / GUI blocking is shorter)

- all WebGL examples should work now (render-to-texture has weird lights and in some camera control feels different)

- CanvasRender still broken, despite many efforts :(
   - currently only points and lines work, faces don't show up. I think this may need assistance from mrdoob.