Optional triangle vertex array normals generation #107
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Hi,
In our project, we don't need normals for raycasting and we don't use rigid body simulations. The computation of normals incur performance and memory usage overhead.
At first, we tried to copy all the stuff related to concave meshes, but we ended up in copying a lot of code for a tiny change.
I'm submitting this pull request to make the computation of normals option. Not sure it's the best way, but at least it raises the idea in the event you come up with something more suitable.