Additional Features Per Point

CesiumJS
1

Hi,

Is it possible to specify additional features per point in a *.pnts file (except for those specified in https://github.com/AnalyticalGraphicsInc/3d-tiles/tree/master/TileFormats/PointCloud#point-semantics) and use them in Cesium later?

For example I need to support multiple color models (Infrared, Intensity and RGB Color) as well as classification etc.

I know that for example the classification can be solved using a Batch Table, but that only allows for one additional feature.

Is something like this already implemented or planned?

Thanks in advance,
Frederick Gnodtke

2

The batch table can support any number of additional properties and then referenced with the styling API. For example in the Point Cloud Styling demo the point cloud has per-point temperature, id, and secondary color. They are not accessible in the JavaScript API however due to performance concerns. Let me know if this helps.

3

But can one point reference different batch ids? Can for example the first point be red and ground and the second point be green and vegetation?

4

Yes that example would work fine.

For per-point properties you don’t actually need to assign batch ids. The arrays in the batch table will store values for all points.

Your case should look something like this: https://github.com/AnalyticalGraphicsInc/3d-tiles/tree/master/TileFormats/PointCloud#per-point-properties (you can use a batch table binary for more efficiency).