​

​

class sbtoolimpl {

    constructor(viewer, toolName){

      this.viewer=viewer;

      this.toolName=toolName

​

    }

         getNames() {

​

            return [this.toolName];

        }

​

       getName() {

​

            return this.toolName;

        }

      activate(){

        return true

      }

​

      deactivate(){

​

        return true

      }

​

​

        update(){return false}

​

        handleSingleClick (event) {

​

const camera= this.viewer.navigation.getCamera();

​

          const vec = new THREE.Vector3();

const pos = new THREE.Vector3();

​

vec.set(

  ( event.clientX / window.innerWidth ) * 2 - 1,

  - ( event.clientY / window.innerHeight ) * 2 + 1,

  0.5 );

​

vec.unproject( camera );

​

vec.sub( camera.position ).normalize();

​

const distance = - camera.position.z / vec.z;

​

pos.copy( camera.position ).add( vec.multiplyScalar( distance ) );

​

​

            this.viewer.impl.createOverlayScene('leaderOverlay-circle');

​

            const circle_geometry = new THREE.CircleGeometry(1, 32);

            const circle_material = new THREE.MeshBasicMaterial({color: 'rgb(1,1,1)'});

            const circle = new THREE.Mesh(circle_geometry, circle_material);

            circle.position.set(pos.x,pos.y,pos.z);

            window.sb = circle;

            this.viewer.impl.addOverlay('leaderOverlay-circle', circle);

            this.viewer.impl.invalidate(true);

​

            return false

        }

​

​

    }

​

​

​

​

    class sbtool extends Autodesk.Viewing.Extension{

​

    constructor(viewer, options){

​

      super(viewer, options);

      this.toolName = 'sb233';

​

      this.tool=null

    }

​

​

​

​

​

    load () {

​

        this.tool = new sbtoolimpl(this.viewer, this.toolName);

​

        viewer.toolController.registerTool(this.tool);

​

        viewer.toolController.activateTool(this.toolName);

​

        return true;

    };

​

  unload  () {

​

        viewer.toolController.deactivateTool(this.toolName);

​

        return true

    }

}

​

​

​

Autodesk.Viewing.theExtensionManager.registerExtension(

    'sb233',

    sbtool);

​

​

​

const viewer = new Autodesk.Viewing.Private.GuiViewer3D(document.getElementById('MyViewerDiv'),{extensions:['sb233']});

​

Autodesk.Viewing.Initializer( {'env' : 'Local'}, () =>viewer.start('https://dukedhx.github.io/Forge-Workshop/shaver/0.svf'))