How-to: Use setSelectionFilter

HOOPS Communicator
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Language: JavaScript

The method setSelectionFilter is useful for leveraging the selection operation to get list of selected nodes and then being able to apply functions from the Model class.

Below is a very rudimentary example where the function sets the visibility to off for selected nodes with even-numbered node ids. To best illustrate the function, use the area selection operator to select multiple model nodes


function mySelectionFilter(node, model) {
	if (node%2 == 0) {
		//console.log("nodeid: " + node);
		model.setNodesVisibility([node], false);	
	}
} 

var sm = hwv.selectionManager;
sm.setSelectionFilter(mySelectionFilter);

It’s worth noting that a selection operation is not actually made when using setSelectionFilter. To check, run the following:

sm.getResults();

Notice the returned array is empty. To get back to the original behavior of the selection operator, call:

sm.setSelectionFilter(null);