Update all examples to work in 1.3.0

[diarmidmackenzie]

Goal: all existing examples working in 1.3.0.

Progress so far on branch "examples-to-1.3"

• Updated examples to use A-Frame 1.3.0
• Updated to use three-to-cannon v4
• Updated examples to use latest environment component & sphere colliders
• Updated CANNON-shape2mesh to use BufferGeometry rather than Geometry. This affects all of: convex polyhedron, trimesh & heightfield. These all need testing, but existing examples don't cover all of these.
• Updated invert -> inverse for Quaternions (reflecting THREE.js interface change)

Examples all now seem to run cleanly with no errors, but some behaviour issues remain...

Current status:

• ammo - OK
• cannon - Turning "debug" on reveals that cylinder and cone physics geometries are out by 90 degrees.
• compound - Need to test interactions in VR (can't test on desktop)
• constraints-ammo - OK
• constraints - Need to test interactions in VR (can't test on desktop)
• materials - Interactions (force-pushable) don't seem to work (though this works in other examples)
• spring - OK
• stress- Mostly OK. Interactions (force-pushable) seem only about 90% reliable?
• sweeper - Sweeper bar does not sweep the objects away
• ttl - Cylinder physics geometry is rotated 90 degrees vs visible geometry.

Also, some examples use teleport controls, which generates a warning, but there doesn't seem to be a fix available yet.

[diarmidmackenzie]

Geometries out by 90 degrees was an issue with my three-to-cannon v4 updates. Now fixed.

Remaining issues:

• compound - Need to test interactions in VR (can't test on desktop)
• constraints - Need to test interactions in VR (can't test on desktop)
• materials - Interactions (force-pushable) don't seem to work (though this works in other examples)
• stress- Mostly OK. Interactions (force-pushable) seem only about 90% reliable?
• sweeper - Sweeper bar does not sweep the objects away
• ttl - TTL timer happens for box, but not for cylinder or sphere. Unclear whether that is expected...?

My latest efforts are published here

[diarmidmackenzie]

More fixes

• issues with force-pushable resolved by tightening up raycast targets
• added interactivity to compound & constraints
• ttl - Having read code more clearly, I see this is exactly what's supposed to happen - only the box has the relevant mixin to make it disappear.

remaining issues are:

• materials - Interactions (force-pushable) still don't work (though this works in other examples)
• sweeper - Sweeper bar does not sweep the objects away

[diarmidmackenzie]

Remaining problems with materials & sweeper are due to these examples using "driver: worker".

Using the non-physics driver, both work fine. I have updated these examples not to use "driver: worker" and will raise a new issue to track getting "driver: worker" fully operational.