How to make viewport selections with HDK and transfer them to your operator group field.
This is update to vimeo.com/mantragora/hdk-creating-polygons video.
Be careful. Selector can reuse already selected geometry so make sure to clear your selection before using it or just use tylda key to reselect.
While you can select edges in viewport and operator will correctly create polygon from them, if you want to use existing group (already created at some point on your geometry) as a source, you need to convert it to a point group. Or just implement it in the operator. At this point you got everything that is needed to solve this.
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