Polygon Rendering Behavior

[TrainedTrex]

What happened?

When the vertices of a polygon are in a particular order, it may sometimes fail to render correctly even when said vertices are following the counter clockwise (CCW) convention. When rendering incorrectly, the boundary of the polygon will appear outside of the vertices or will not obey the vertices locations. In the sandcastle, the purple polygon has it's vertices in an order that makes it display correctly while the blue polygon has the same vertices but in a different order and is displayed incorrectly.

cc. @jpthompson212

Reproduction steps

1. Load Sandcastle
2. Shift blue polygon vertices by one index. ([0] --> [1]...)
3. Run Sandcastle

Sandcastle example

https://sandcastle.cesium.com/#c=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

Environment

Browser: Chrome Version 131.0.6778.265 (Official Build) (64-bit)
CesiumJS Version: 1.125
Operating System: Windows 11 23H2 22631.4751