anchor.diff:              renderer.setSize( window.innerWidth, window.innerHeight );
               document.body.appendChild( renderer.domElement );
   
  -
  +            //- 平面坐標系
               geometry = new THREE.Geometry();
               for (i = -size; i <= size; i += step) {
                   if (i == 0) {
  
positive.code: extends threejslayout
  
  block content
  
      script.
          var scene,
              camera,
  
negative.code:             //- 绑定窗口大小，自适应
              var threeexResize = new THREEex.WindowResize(renderer, camera);
  
              //- threejs 的控制器
              var controls = new THREE.OrbitControls( camera, renderer.domElement );
              controls.target = new THREE.Vector3(0,15,0);
              controls.maxPolarAngle = Math.PI / 2;
              //- controls.addEventListener( 'change', function() { renderer.render(scene, camera); } ); // add this only if there is no animation loop (requestAnimationFrame)
          }
          
          function animate() {
  