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CesiumGS
Inconstant Cluster/Decluster zoom levels
Reported on the forum here: https://groups.google.com/forum/#!topic/cesium-dev/HTAJnvct838
When zooming in and out with billboard clusters, the levels at which billboards cluster and uncluster is inconsistent. It seems that pixelRange is applied to determine when to group billboards into a cluster, but the cluster is "sticky" when zooming in and does not break apart until some zoom level where a significantly larger pixel range is seen.
This can be reproduced with the clustering demo. Here are steps:
- Set "Pixel Range" to 100 and "Minimum Cluster Size" to 2.
- Zoom in to get to a place where 2 billboards are nearby and may be clustered
- Slowly zoom out from the 2 billboards and notice the last zoom level before the billboards combine.
- Slowly zoom in and notice that you need to keep zooming past the level from above to get the billboards to uncluster.
If this is intended behavior, we can go ahead an close this issue.
