isZero actually checks the squared length against the "small epsilon".
0.0001 = 0.01² so the function will return true for a length < 0.01.

By the way if there is a good reason for a so limited accuracy it should be given here in the doc (or maybe even in the code).

Not really sure what to do with UVs for remaining geometries - they are either quite arbitrary or anyways not working well so far.

Also did some housekeeping for more geometry examples.

This fixes also TextGeometry.

This fixes IcosahedronGeometry and OctahedronGeometry (IcosahedronGeometry does have messed up UVs at the seam though this was broken even before, in r49).

Also made object rotation frame-rate independent in geometries example.

I'm not sure though bold => black is enough to make distinctions. Maybe on Windows we should use native Consolas with real bold as suggested by @spite?

This was creating mess when URL contained "html" also elsewhere than just at the end.

This reverts commit da1d2a66.

Otherwise you get "Uncaught TypeError: Cannot call method 'getInverse' of undefined".

This fixes broken custom blending example.

ColladaLoader is apparently creating parameter objects looking like this { "color" : undefined }