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最新推荐文章于 2025-08-11 19:52:03 发布

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分类专栏： webgl three.js javascript 文章标签： webgl web3d three.js javascript animation

本文链接：https://blog.youkuaiyun.com/omni360/article/details/38846577

webgl 同时被 3 个专栏收录

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本文展示了如何使用Three.js库创建一个简单的3D立方体动画，包括设置场景、相机、光源、纹理映射和动画控制。通过添加鼠标事件监听，实现立方体的旋转效果。

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style="width: 100%; height: 300px" src="http://omni360.github.io/webgl/chapter2.1.html" allowfullscreen="allowfullscreen" frameborder="0">

以下是源码：

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>welcome to webgl chapter2.1</title>
			<script src="http://cdnjs.cloudflare.com/ajax/libs/three.js/r68/three.min.js"></script>
        <script type="text/javascript">
        var renderer = null,
        	scene=null,
        	camera=null,
        	cube=null,
        	cubea=null,
        	animating=false;
        	function onload(){
        		//抓取作为Canvas容器的<div>标签
        		var container = document.getElementById("container");

        		//创建Three.js渲染器，并添加到<div>标签中
        		renderer = new THREE.WebGLRenderer( {antialias: true} );
        		renderer.setSize(container.offsetWidth,container.offsetHeight)
        		container.appendChild(renderer.domElement);

        		//创建Three.js场景
        		scene = new THREE.Scene();
        		
        		//创建相机，并添加到场景中。
        		camera=new THREE.PerspectiveCamera( 45, container.offsetWidth/container.offsetHeight, 1, 4000 );
        		camera.position.set(0,0,3);

        		//创建一个平行光光源照射到物体上。
        		var light = new THREE.DirectionalLight( 0xffffff,1.5 );
        		light.position.set(0,0,1);
        		scene.add(light);

        		//创建一个接受光照并带有纹理映射的立方体，并添加到场景中
        		//首先，创建一个带纹理映射的立方体。
        		var mapUrl="http://sandbox.runjs.cn/uploads/rs/471/kdnkkh9t/rocy.hou.jpg";
        		var map = THREE.ImageUtils.loadTexture(mapUrl);

        		//创建一个接受光照并带有纹理映射的立方体，并添加到场景中
        		//首先，创建一个带纹理映射的立方体。
        		var mapUrla="http://sandbox.runjs.cn/uploads/rs/471/kdnkkh9t/joe1.jpg";
        		var mapa = THREE.ImageUtils.loadTexture(mapUrla);

        		//然后创建一个Phong材质来处理着色，并传递给纹理映射。
        		var material = new THREE.MeshPhongMaterial( {map:map} );

        		//然后创建一个Phong材质来处理着色，并传递给纹理映射。
        		var materiala = new THREE.MeshPhongMaterial( {map:mapa} );

        		//创建一个立方体的几何体
        		var geometry = new THREE.CubeGeometry( 1, 1, 1 );

        		//创建一个立方体的几何体
        		var geometrya = new THREE.CubeGeometry( 1, 1, 1 );

        		//将几何体和材质放到一个网格中
        		cube = new THREE.Mesh(geometry, material);
        		cube.position.set(-1.5,0,0);

        		//将几何体和材质放到一个网格中
        		cubea = new THREE.Mesh(geometrya, materiala);
        		cubea.position.set(1.5,0,0);

	    		//设置网格在场景中的朝向，否则我们将不会看到立方体的形状。
        		cube.rotation.x=Math.PI /5;
        		cube.rotation.y=Math.PI/5;

	    		//设置网格在场景中的朝向，否则我们将不会看到立方体的形状。
        		cubea.rotation.x=Math.PI /5;
        		cubea.rotation.y=Math.PI /5;


        		//将立方体网格添加到场景中
        		scene.add(cube);

        		//将立方体网格添加到场景中
        		scene.add(cubea);


        		//添加处理鼠标事件的函数，用于控制动画的开关。
        		addMouseHandler();

        		//运行渲染循环
        		run();

        	}
/*    		function onload()
			{
				// Grab our container div
		        var container = document.getElementById("container");

		        // Create the Three.js renderer, add it to our div
			    renderer = new THREE.WebGLRenderer( { antialias: true } );
			    renderer.setSize(container.offsetWidth, container.offsetHeight);
			    container.appendChild( renderer.domElement );

			    // Create a new Three.js scene
			    scene = new THREE.Scene();

			    // Put in a camera
		        camera = new THREE.PerspectiveCamera( 45, container.offsetWidth / container.offsetHeight, 1, 4000 );
		        camera.position.set( 0, 0, 3 );

		        // Create a directional light to show off the object
				var light = new THREE.DirectionalLight( 0xffffff, 1.5);
				light.position.set(0, 0, 1);
				scene.add( light );

		        // Create a shaded, texture-mapped cube and add it to the scene
		        // First, create the texture map
		        var mapUrl = "./images/rocy1.jpg";
		        var map = THREE.ImageUtils.loadTexture(mapUrl);
		        
		        // Now, create a Phong material to show shading; pass in the map
		        var material = new THREE.MeshPhongMaterial({ map: map });

		        // Create the cube geometry
		        var geometry = new THREE.CubeGeometry(1, 1, 1);

		        // And put the geometry and material together into a mesh
		        cube = new THREE.Mesh(geometry, material);

		        // Turn it toward the scene, or we won't see the cube shape!
		        cube.rotation.x = Math.PI / 5;
		        cube.rotation.y = Math.PI / 5;

		        // Add the cube to our scene
		        scene.add(cube);

		        // Add a mouse up handler to toggle the animation
		        addMouseHandler();

		        // Run our render loop
		        run();
			}*/
        	function run(){
        		//渲染场景
        		renderer.render(scene,camera);

        		//在下一帧中旋转立方体
        		if(animating){
        			cube.rotation.y-=0.01;
        			cubea.rotation.y+=0.01;
        		}

        		//在另一帧中回调
        		requestAnimationFrame(run);
        	}
        	function addMouseHandler(){
        		var dom = renderer.domElement;
        		dom.addEventListener('mouseup',onMouseUp,false);
        	}
        	function onMouseUp(event){
        		event.preventDefault();
        		animating= !animating;
        	}
        </script>
    </head>
    <body onload="onload()" style="">
    	<center><h1>Rocy and Joe!</h1></center>
    	<div id="container" style="width:95%; height:80%;position:absolute;"></div>
    	<div id="prompt" style="width:95%; height:6%;bottom:0;position:absolute;">
    		Click to animate the cube
    	</div>

    </body>
</html>

requestAnimationFrame源码：

/**
 * Provides requestAnimationFrame in a cross browser way.
 * http://paulirish.com/2011/requestanimationframe-for-smart-animating/
 */

if ( !window.requestAnimationFrame ) {

	window.requestAnimationFrame = ( function() {

		return window.webkitRequestAnimationFrame ||
		window.mozRequestAnimationFrame ||
		window.oRequestAnimationFrame ||
		window.msRequestAnimationFrame ||
		function( /* function FrameRequestCallback */ callback, /* DOMElement Element */ element ) {

			window.setTimeout( callback, 1000 / 60 );

		};

	} )();

}

css源码：

* {
    font-family: Arial;
    font-style: italic;
}

body {
	background-color:#eeeeee;
	color:#212121;
}

#container {
	z-index:-1;
	background-color:#eeeeee;

}