This is optional, for now by default it's off, like it was before. It's up to application to update geometry bounding sphere if vertex positions change (like for meshes).
Work in progress, caveats:
- sort happens just inside one ParticleSystems, so everything gets messed up when more ParticleSystems are in the same screen space
- not yet solved proper order of operations, if you change object transform, you need to update ParticleSystem object matrix manually before rendering (so that sort works, otherwise it will use transform from previous frame)
Also fixed transparency in fog and did small optimizations in WebGLRenderer.
No need to stuff them in different bucket, line-specific stuff is anyway done in `renderBuffer` method.
This was prompted by starting with implementation of ParticleSystem. It would be unwieldy to handle three different buckets of objects / buffers.
alteredq
Mr.doob