Forge Viewer API: Bounding box for a specific element

问题

I am using the following method for determining the bounding box of a specific element:

MyViewer.select( [dbId]); var box = MyViewer.utilities.getBoundingBox();

This works but I wonder if there is a direct function to do this (similar to how getBulkProperties work), especially when I am running through a large number of dbIds in a loop.

I also figured out that I can do this by finding the list of fragments of the element and calculating bounding box of each to calculate element's bounding box. That is more work.

Thanks Bandu

回答1:

@Bandu, I do not find any more direct method, but maybe the code function below could be of use?

 function getModifiedWorldBoundingBox (fragIds) {

        //fragments list array
        var fragList = NOP_VIEWER.model.getFragmentList();
        const fragbBox = new THREE.Box3()
        const nodebBox = new THREE.Box3()

        fragIds.forEach(function(fragId) { 
           fragList.getWorldBounds(fragId, fragbBox) 
           nodebBox.union(fragbBox)
        })

    return nodebBox
 }

来源：https://stackoverflow.com/questions/51035030/forge-viewer-api-bounding-box-for-a-specific-element