模型加载冻结场景

Question

我的场景在模型加载期间暂时冻结。是否有任何阻止这种情况的选择？

var loader = new THREE.JSONLoader();
loader.load("model.js", function(smooth) {
  smooth.mergeVertices();
  smooth.computeFaceNormals();
  smooth.computeVertexNormals();
  var modifier = new THREE.SubdivisionModifier(1);
  modifier.modify(smooth);
  scene.add(smooth);
  var mesh = new THREE.Mesh(smooth, new THREE.MeshPhongMaterial({
    color : 0x222222
  }));
  $('input').change(function() {
    if ($("#radio1, #radio2, #radio3, #radio4").is(":checked")) {
      scene.add(vierring);
    } else if ($("#radio1, #radio2, #radio3, #radio4").is(":not(:checked)")) {
      scene.remove(vierring);
    }
  });
});