Camera collision constraint within a model

[ka_sc]

We havent quite decided yet but the camera limiter approach seems the most promising.
For limiting zoom i looked at these but i am still confused.

Camera behavior after update to version 1.70

I have modified this sandcastle a little bit, with the settings of the viewer, which are used in our case and set ._maximumUndergroundPickDistance to 80000.0 Unfortunately, I can’t restore the old (<1.70) camera behavior with this setting. The area marked as “1” in the screenshot above is slightly extended by modifying this setting, but as soon as the camera is just a little bit deeper in the space of the earth’s interior, the camera turns around itself again when clicking the mouse wheel, lik…

Whats the unit of _maximumUndergroundPickDistance for example?
cameraController._maximumUndergroundPickDistance = 80000.0;

Camera underground controls

Looks like undergroundSurfaceHeight got removed again in the end, in favour of:
If someone needs an underground distance limiter, it might make more sense for them to place a large underground ellipsoid. Is this an example on how to that Cesium Sandcastle? And can you have collision with that ellipsoid then?