Question

我正在为旋转立方体写一个类，但每次我旋转或缩放时，都会出现错误＆＃34;无法读取属性＆＃39;渲染＆＃39;未定义＆＃34;。我究竟做错了什么？我猜这些范围有问题。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);
    };
 };

Tnanks。

Answer 1

您在此处指定的回调中存在范围问题：

this.controls.addEventListener( 'change', this.render );

在班上，添加

var scope = this;

然后重写您的render()方法：

this.render = function () {

    scope.renderer.render( scope.scene, scope.camera );

};

此外，添加事件侦听器的目的是删除动画循环。

所以...，删除它，只有在鼠标导致相机移动时才会渲染。

您最初必须先调用render()，并在模型加载后调用。

three.js r.69

Answer 2

您可以按以下方式使用bind方法，它将保留render方法的作用域

this.controls.addEventListener( 'change', this.render.bind(this) );

Three.js + OrbitControls - 未捕获的TypeError：无法读取未定义的属性'render'

2 个答案: