Why is the clipping plane different from the actual cut

[PrUnSt]

Sandcastle example: https://cesiumjs.org/Cesium/Build/Apps/Sandcastle/?src=3D%20Tiles%20Clipping%20Planes.html

Browser: chrome 73.0.3683.86

Operating System: windows10

[OmarShehata]

I need to investigate a bit more to determine if the issue is in this tileset or not. It may be related to how we changed how we compute the origin point for the clipping planes: #7182.

Have you encountered this on your own tilesets, or just on this one?

For anyone else looking at this, it becomes much more obvious when you set the alpha of the clipping plane to 0.7 or 0.8, it's clear that there's a discrepancy between the clipping plane itself, and the visual plane entity.

[PrUnSt]

I have encountered this problem on many tileset

[likangning93]

It may be related to how we changed how we compute the origin point for the clipping planes

More supporting evidence, there doesn't seem to be a noticeable offset when clipping individual models or terrain.

[PrUnSt]

how cesium compute the origin point for the clipping planes:

[OmarShehata]

Just an update that I believe this is fixed in this draft PR: #8392