Custom Vertex Normals Support

[AlexandruPopovici]

Description & motivation

Added support for custom vertex normals. Moved normal computation from batch level to object level, handling WEB-596 in the process

Changes:

To-do before merge:

Screenshots:

Validation of changes:

Checklist:

• My pull request follows the guidelines in the Contributing guide?
• My pull request does not duplicate any other open Pull Requests for the same update/change?
• My commits are related to the pull request and do not amend unrelated code or documentation.
• My code follows a similar style to existing code.
• I have added appropriate tests.
• I have updated or added relevant documentation.

References

[linear]

CNX-1114 Add Support for Vertex Normals

[github-actions]

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[JR-Morgan]

❤

[JR-Morgan]

Here's an example of a rhino SubD geometry that really benefits from this feature

Before:

After:

And in Rhino (rendered view)
this is the meshified subd, with a similar poly count to what Speckle will send as an example of the bar to reach (which we've done!)

Sticking more examples here https://testing1.speckle.dev/projects/d7db809737
Including some where the difference is negegable.
curvy 3d subd and breps from Rhino show the most improvement, with no more seams or poorly shaded edges.

I also plan to bring this vertex normals to Blender as in v2 we frequently saw problems with our lack of custom vertex normal support.