Mathias Agopian 7a14aadb28 sample clean-up and new sphere object (#134) ...

* Add missing method to query the type of a light

* IcoSphere now generates front facing triangles

* Add a fairly generic sphere object to use in samples

it provides an ico sphere with normal, and reuses
the same vertex/index buffer for each new instance.
Each instance can have its own material, size and
position.

currently it’s not possible to change the # of
subdivisions.

* FilamentApp now provides a “default” pbr material

this makes it easier to create renderables for
testing.

* clean-up lightbulb and add spheres for each light

lightbulb now has less hardcoded things and it
spawns a small sphere for each light.

2018-08-23 21:12:46 -07:00

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