setThemingColor only working for leaf node dbIds

Question

From the documentation it looks like you should be able to call setThemingColor with any dbId, but it seems to only work if the id that you pass is a leafnode? Is this correct?

Also is there any way to bulk call this method, or is it only one single leaf node at a time? I would like to pass an array of dbId's into the method.

Answer 1

Yes, it's only working with the leaf nodes in my experience. However, leaf nodes of a parent node can be retrieved in this way:

getLeafNodes( model, dbIds ) {

      return new Promise( ( resolve, reject ) => {

        try {

          const instanceTree = model.getData().instanceTree

          dbIds = dbIds || instanceTree.getRootId();

          const dbIdArray = Array.isArray( dbIds ) ? dbIds : [dbIds]
          let leafIds = [];

          const getLeafNodesRec = ( id ) => {
            let childCount = 0;

            instanceTree.enumNodeChildren( id, ( childId ) => {
                getLeafNodesRec( childId );

                ++childCount;
              })

            if( childCount == 0 ) {
              leafIds.push( id );
            }
          }

          for( let i = 0; i < dbIdArray.length; ++i ) {
            getLeafNodesRec( dbIdArray[i] );
          }

          return resolve( leafIds );

        } catch (ex) {

          return reject(ex)
        }
    })
}

getLeafNodes( viewer.model, [1] )
    .then( ( leafNodes ) => {
      // All leaf dbIds under the dbId 1.
      console.log( leafNodes );
    })
    .catch( ( error ) => console.warn( error ) );

After retrieving all leaf dbIds, you can simply write a for loop to call setThemingColor for every dbIds like this way:

const color = new THREE.Vector4( 255/255, 0, 0, 1 );

getLeafNodes( viewer.model, [1] )
    .then( ( leafNodes ) => {

      // Call setThemingColor for every leaf node.
      for( let i = 0; i < leafNodes.length; i++ ) {
          viewer.setThemingColor( leafNodes[i], color );
      }

    })
    .catch( ( error ) => console.warn( error ) );

Hope this help.

Ref of the function getLeafNodes: https://forge.autodesk.com/blog/hidding-completely-viewer-nodes-no-ghosting