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Voxel clippingPlanes clip in different direction #13705

Description

@t-crowd

What happened?

What happened:
When applying a clippingPlaneCollection to a voxelPrimitve, the clipped volume is inverted compared to Cesium3DTileset or Entities.

What I would expect:
Same clipping behavior to the one of e.g. Cesium3DTileset.

Workaround:
To achieve the same behavior, both, plane normal and distance needs to be negated. Then clipping behaves the same.

Reproduction steps

  1. Create ClippingPlaneCollection
  2. Create VoxelPrimitive and Cesium3DTileset
  3. Apply clippingPlanes to both and compare

Sandcastle example

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

Environment

Browser: Firefox/Edge
CesiumJS Version: 1.144.0
Operating System: Linux

AI acknowledgment

  • I used AI to generate this issue report.
  • (If the above is checked) I have reviewed the AI-generated content before submitting.

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