我正在编写一个用于旋转立方体的类,但是每次旋转或缩放时,都会收到错误"无法读取未定义的属性'渲染'"。我做错了什么?我想范围有问题。这是我的班级:
myclass = function() {
this.camera = null;
this.scene = null;
this.renderer = null;
this.product = null;
this.init = function (container) {
this.scene = new THREE.Scene();
this.camera = createCamera();
this.product = createProduct();
this.scene.add(this.product);
this.createRenderer();
this.setControls();
container.appendChild(this.renderer.domElement);
this.animate();
};
function createCamera() {
var camera = new THREE.PerspectiveCamera(20, 300 / 400, 1, 10000);
camera.position.z = 1800;
return camera;
}
function createProduct() {
var geometry = new THREE.BoxGeometry(300, 200, 200);
var materials = ...;
var product = new THREE.Mesh(geometry, new THREE.MeshFaceMaterial(materials));
return product;
}
this.createRenderer = function () {
this.renderer = new THREE.WebGLRenderer({antialias: true});
this.renderer.setClearColor(0xffffff);
this.renderer.setSize(this.sceneWidth, this.sceneHeight);
};
this.setControls = function () {
this.controls = new THREE.OrbitControls(this.camera, this.renderer.domElement);
this.controls.addEventListener('change', this.render);
};
this.animate = function () {
requestAnimationFrame(this.animate.bind(this));
this.render();
};
this.render = function () {
this.renderer.render(this.scene, this.camera);
};
};
叽叽喳喳。
此处指定的回调中存在范围问题:
this.controls.addEventListener( 'change', this.render );
在您的课程中,添加
var scope = this;
然后像这样重写render()
方法:
this.render = function () {
scope.renderer.render( scope.scene, scope.camera );
};
此外,添加事件侦听器的要点是删除动画循环。
所以...,删除它,并且仅在鼠标导致相机移动时渲染。
您还必须在最初调用一次render()
,并在模型加载后调用一次。
三.js 69
你可以使用绑定方法,如下所示,它将保存渲染方法的范围
this.controls.addEventListener( 'change', this.render.bind(this) );