HTML5 画布上的 Three.js 环境灯光(HTML5 Canvas Three.js Ambient Lighting)
HTML5 画布上的 Three.js 环境灯光(HTML5 Canvas Three.js Ambient Lighting)
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HTML5 画布上的 Three.js 环境灯光
HTML5 Canvas Three.js Ambient Lighting
<!DOCTYPE HTML> <html> <head> <style> body { margin: 0px; padding: 0px; } </style> </head> <body> <div id="container"></div> <script src="http://www.html5canvastutorials.com/libraries/three.min.js"></script> <script defer="defer"> // revolutions per second var angularSpeed = 0.2; var lastTime = 0; // this function is executed on each animation frame function animate(){ // update var time = (new Date()).getTime(); var timeDiff = time - lastTime; var angleChange = angularSpeed * timeDiff * 2 * Math.PI / 1000; cube.rotation.y += angleChange; lastTime = time; // render renderer.render(scene, camera); // request new frame requestAnimationFrame(function(){ animate(); }); } // renderer var renderer = new THREE.WebGLRenderer(); renderer.setSize(window.innerWidth, window.innerHeight); document.body.appendChild(renderer.domElement); // camera var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 1000); camera.position.z = 500; // scene var scene = new THREE.Scene(); // cube var cube = new THREE.Mesh(new THREE.CubeGeometry(200, 200, 200), new THREE.MeshLambertMaterial({ color: ‘blue‘ })); cube.overdraw = true; cube.rotation.x = Math.PI * 0.1; scene.add(cube); // add subtle blue ambient lighting var ambientLight = new THREE.AmbientLight(0x000044); scene.add(ambientLight); // directional lighting var directionalLight = new THREE.DirectionalLight(0xffffff); directionalLight.position.set(1, 1, 1).normalize(); scene.add(directionalLight); // start animation animate(); </script> </body> </html>
讨论
Discussion
要使用 Three.js 创建环境灯光,我们可以实例化一个 AmbientLight 对象,然后把它添加到场景中。环境灯光需要一个颜色来定义。环境灯光照亮整个场景,可用于柔化位置灯光,诸如 directional 灯光。
To create ambient lighting with Three.js, we can instantiate an AmbientLight object and then add it to the scene. AmbientLight requires is defined with a color. Ambient lights illuminate the entire scene and can be used to soften positional lights such as directional lights.
HTML5 画布上的 Three.js 环境灯光(HTML5 Canvas Three.js Ambient Lighting),古老的榕树,5-wow.com
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