我有一个简单的类,我用来管理场景在three.js。我有requestAnimationFrame循环找到函数引用的问题。我知道我在这里错过了一些基本的东西,被困在一些这个噩梦中。我需要使用bind或call来传递this引用给requestAnimationFrame吗?
var THREE = THREE || {};
var SceneBuddy = SceneBuddy || {};
SceneBuddy = function(scene, camera) {
this.scene = scene;
this.camera = camera;
this.sceneClock = new THREE.Clock();
this.renderer = {};
this.resolution = {};
this.controls = {};
};
//Start Animate
SceneBuddy.prototype.startAnimate = function() {
requestAnimationFrame(this.startAnimate); //this does not work, type error
this.render.call(this);
};
//Render Function
SceneBuddy.prototype.render = function() {
var delta = this.sceneClock.getDelta();
this.controls.update(delta);
this.renderer.render(this.scene,this.camera);
};
//Setup Renderer
SceneBuddy.prototype.initRenderer = function(resolution) {
if (!Detector.webgl) {
Detector.addGetWebGLMessage();
return;
}
else {
var renderer = new THREE.WebGLRenderer({
antialias: true,
preserveDrawingBuffer: true
});
renderer.setSize(resolution.x, resolution.y);
renderer.shadowMapEnabled = true;
this.resolution = resolution;
this.renderer = renderer;
}
};
我正在使用当前使用SceneBuddy这样:
var camera = new THREE.PerspectiveCamera(75, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 100000);
var scene = new THREE.Scene();
var sceneBuddy = new SceneBuddy(scene, camera);
sceneBuddy.initRenderer({x: 940, y: 400});
sceneBuddy.attachRenderer(container); //attaches renderer to dom element
sceneBuddy.initControls();
sceneBuddy.startAnimate(); // broken.
在传递函数时使用bind
来指定调用函数时this
的值:
SceneBuddy.prototype.startAnimate = function() {
requestAnimationFrame(this.startAnimate.bind(this));
this.render();
};