How to sum volumes inside a polygon

First we need to bring have some solids to operate over. The solids from any data table can be brought into a design layer using the import option:

Make another layer with the poly in it, then navigate to the Triangulation -> Clip By Polygon tool. Every tool can be found in the banner up the top or from the right click menu:

Select the input layer to be the layer with the solids in it, choose plan view, hit next, select the poly, then click outside the poly to cut everything outside and you should get:

To easily select all the shapes in the layer you can select all like this:

Now you’ll need a volume Attribute. To set this up right click the design title in the design data panel -> setup -> attributes:

Very similar to a table field, set up Volume to be a Sum aggregation and the format string you want:

Now the solids will have a volume property, but nothing written to them yet. To recalculate the volume from the recut solids, go to Triangulation -> Set attribute by Expression and run with Expression GetSolidVolume(CurrentElement). Run this over the layer or select all of the cut solids and run it over the selection:

Now you can select any of the solids you want and you will see a Sum of the volumes in the Properties panel on the right hand side. If you don't see the aggregation column just click on the Aggregation Summary box.

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