Html5 canvas 将three.js动画放入div中
这是three.js动画代码示例:Html5 canvas 将three.js动画放入div中,html5-canvas,three.js,Html5 Canvas,Three.js,这是three.js动画代码示例: <script defer="defer"> var angularSpeed = 0.2; var lastTime = 0; function animate(){ var time = (new Date()).getTime(); var timeDiff = time - lastTime; var angleChange = angularSpeed * timeDiff * 2 * Math.PI
<script defer="defer">
var angularSpeed = 0.2;
var lastTime = 0;
function animate(){
var time = (new Date()).getTime();
var timeDiff = time - lastTime;
var angleChange = angularSpeed * timeDiff * 2 * Math.PI / 1000;
plane.rotation.z += angleChange;
lastTime = time;
renderer.render(scene, camera);
requestAnimationFrame(function(){
animate();
});
}
var renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 1000);
camera.position.y = -450;
camera.position.z = 400;
camera.rotation.x = 45 * (Math.PI / 180);
var scene = new THREE.Scene();
var plane = new THREE.Mesh(new THREE.PlaneGeometry(300, 300), new THREE.MeshNormalMaterial());
plane.overdraw = true;
scene.add(plane);
animate();
</script>
但是我还没有找到一种方法来用three.js做类似的事情。正如您在代码示例中看到的,我并没有可以引用的canvas元素。有什么想法吗?您可以使用如下模式:
<div id="canvas">
#canvas {
background-color: #000;
width: 200px;
height: 200px;
border: 1px solid black;
margin: 100px;
padding: 0px;
position: static; /* fixed or static */
top: 100px;
left: 100px;
}
container = document.getElementById( 'canvas' );
document.body.appendChild( container );
renderer = new THREE.WebGLRenderer();
renderer.setSize( 200, 200 );
container.appendChild( renderer.domElement );
#帆布{
背景色:#000;
宽度:200px;
高度:200px;
边框:1px纯黑;
利润率:100像素;
填充:0px;
位置:静态;/*固定或静态*/
顶部:100px;
左:100px;
}
container=document.getElementById('canvas');
文件.正文.附件(容器);
renderer=new THREE.WebGLRenderer();
设置大小(200200);
container.appendChild(renderer.doElement);
小提琴:
也看到
three.js r.69如果您不想硬编码渲染器大小,那么下面的一段代码可以帮助您。 我动态计算画布的高度和宽度,然后相应地设置渲染器的大小和相机的位置 CSS HTML
下面是WestLangley所示模式的另一个变体: HTML: JavaScript:
this.mount = document.querySelector('#scene');
this.width = document.querySelector('#scene').offsetWidth;
this.height = document.querySelector('#scene').offsetHeight;
...
this.renderer = new THREE.WebGLRenderer({ alpha: true });
this.renderer.setPixelRatio(window.devicePixelRatio);
this.renderer.setSize(this.width, this.height);
this.mount.appendChild(this.renderer.domElement);
Three.JS在
div#scene
容器中渲染
元素,该容器位于填充包装器的绝对位置。大小由包装器div的尺寸控制。但是如果宽度和高度不同怎么办。我需要它们是不同的,但这实际上改变了高度和宽度的纵横比。因此,圆圈看起来是椭圆形的。@sahilshekhawatrenderer.setSize(画布宽度、画布高度)
并确保摄像头方面
正确。我正在使用透视摄像头的设置大小
。没有考虑相机的纵横比。感谢renderer.setSize
为什么要硬连线canvas\u width
和canvas\u height
而不是从clientWidth
和clientHeight
容器对象的属性中获取值?除非有充分的理由,否则我更喜欢WebGLRenderer而不是CanvasRenderer。
<div id="canvas">
#canvas {
background-color: #000;
width: 200px;
height: 200px;
border: 1px solid black;
margin: 100px;
padding: 0px;
position: static; /* fixed or static */
top: 100px;
left: 100px;
}
container = document.getElementById( 'canvas' );
document.body.appendChild( container );
renderer = new THREE.WebGLRenderer();
renderer.setSize( 200, 200 );
container.appendChild( renderer.domElement );
#canvas {
background-color: #FFF;
width: 200px;
height:200px;
border: 1px solid black;
}
<div id="canvas"/>
//Add Renderer
renderer = new THREE.CanvasRenderer();
var container = document.getElementById('canvas');
var w = container.offsetWidth;
var h = container.offsetHeight;
renderer.setSize(w, h);
container.appendChild(renderer.domElement);
//Add Camera
camera = new THREE.PerspectiveCamera( 75, w / h, 2, 1000 );
camera.position.z = 400;
//Create Scene with geometry, material-> mesh
scene = new THREE.Scene();
geometry = new THREE.IcosahedronGeometry( 200, 3 );
material = new THREE.MeshBasicMaterial( { color: 0x000000, wireframe: true, wireframeLinewidth: 1 } );
mesh = new THREE.Mesh( geometry, material );
scene.add( mesh );
<div class="relative h-256 w-256">
<div id="scene"></div>
</div>
#scene {
overflow: hidden;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
.relative {
position: relative;
}
.h-256 {
height: 256px;
}
.w-256 {
width: 256px;
}
this.mount = document.querySelector('#scene');
this.width = document.querySelector('#scene').offsetWidth;
this.height = document.querySelector('#scene').offsetHeight;
...
this.renderer = new THREE.WebGLRenderer({ alpha: true });
this.renderer.setPixelRatio(window.devicePixelRatio);
this.renderer.setSize(this.width, this.height);
this.mount.appendChild(this.renderer.domElement);