Model polygon clipping shader impl

[mzschwartz5]

Description

This PR wires up the vector textures as uniforms through the ModelClippingPolygonsPipelineStage, and uses them with the vector-clipping shader functions to replace SDF-based clipping.

As of this PR, 3D tiles and standalone models perform clipping via the vector pipeline. (Though the SDF textures are still generated, just not used anymore -- that stuff is fully removed in the next PR).

Issue number and link

TODO: need issue

Testing plan

A sandcastle that uses a star shaped polygon to clip the globe (feel free to add terrain and test that too). Use the slider or input field to change the scale of the star and ensure it's crisp at all scales.

Standalone model clipping

Dynamic clipping collection -- this one tests adding and removing clipping polygons from a collection. Use drop-down to test on terrain and 3d tiles.

Standard clipping regions sandcastle -- basic functionality check

The clipping performance dev sandcastle is another good one for testing various numbers (of polygons, points per polygon, spacing, etc.). Performance should be slightly better than previously, but it's still dominated by the per-frame checks that iterate over every polygon vertex to check for mutations (likely to be removed soon).

Author checklist

• I have submitted a Contributor License Agreement
• I have added my name to CONTRIBUTORS.md
• I have updated CHANGES.md with a short summary of my change
• I have added or updated unit tests to ensure consistent code coverage
• I have updated the inline documentation, and included code examples where relevant
• I have performed a self-review of my code

AI acknowledgment

• I used AI to generate content in this PR
• If yes, I have reviewed the AI-generated content before submitting

If yes, I used the following Tools(s) and/or Service(s):

If yes, I used the following Model(s):

PR Dependency Tree

• PR Clipping polygon buffer migration #13623
  • PR Vector Textures for Polygon Clipping #13635
    • PR Clipping texture plumbing #13636
      • PR Shader rework for terrain polygon clipping #13637
        • PR Remove SDF polygon clipping from Globe #13638
          • PR Model clipping rework foundation #13641
            • PR Model polygon clipping shader impl #13647 👈
              • PR Remove polygon clipping sdf path #13654
                • PR Clipping Polygon Holes #13660
                  • PR ClippingPolygon immutable positions (performance) #13665

This tree was auto-generated by Charcoal

[github-actions]

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