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146 lines
4.5 KiB
146 lines
4.5 KiB
3 years ago
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<!DOCTYPE html>
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<html>
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<head>
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<title>Threejs引入字体，实现3D文字，Canvas画布作为纹理贴图实现滚动字幕</title>
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<meta charset="UTF-8">
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<script type="text/javascript" src="lib/statistics.js"></script>
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<script type="text/javascript" src="lib/steak.js"></script>
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<script type="text/javascript" src="lib/three.js"></script>
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<script type="text/javascript" src="lib/OrbitControls.js"></script>
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<script type="text/javascript" src="lib/ColladaLoader.js"></script>
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<script type="text/javascript" src="lib/dat.gui.js"></script>
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<script type="text/javascript" charset="UTF-8" src="lib/Tween.min.js"></script>
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<style>
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body {
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margin: 0;
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overflow: hidden;
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}
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</style>
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</head>
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<body>
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<div id="dom"></div>
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<script type="text/javascript">
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var camera;
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var renderer;
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var fontMesh;
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var canvasTexture;
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function init() {
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// 创建一个场景，它将包含我们所有的元素，如物体，相机和灯光。
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var scene = new THREE.Scene();
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scene.opacity = 0;
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// 创建一个摄像机，它定义了我们正在看的地方
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camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 100000);
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// 将摄像机对准场景的中心
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camera.position.z = 500;
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camera.lookAt(scene.position);
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var orbit = new THREE.OrbitControls(camera);
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// 创建一个渲染器并设置大小，WebGLRenderer将会使用电脑显卡来渲染场景
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renderer = new THREE.WebGLRenderer({
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antialias: true,
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logarithmicDepthBuffer: true,
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});
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renderer.setClearColor(new THREE.Color("#0e0934"));
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renderer.setSize(window.innerWidth, window.innerHeight);
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var ambientLight = new THREE.AmbientLight("#ffffff", 1);
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scene.add(ambientLight);
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// 将呈现器的输出添加到HTML元素
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document.getElementById("dom").appendChild(renderer.domElement);
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// 启动动画
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renderScene();
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add3DFont();
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addLEDScreen();
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function add3DFont() {
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new THREE.FontLoader().load('font/FZYaoTi_Regular.json', function(font) {
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//加入立体文字
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var text = new THREE.TextGeometry("左本的博客，Three.js3D文字", {
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// 设定文字字体
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font: font,
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//尺寸
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size: 24,
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//厚度
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height: 5
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});
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text.computeBoundingBox();
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// 设置偏移
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text.translate(-220, 0, 0);
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//3D文字材质
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var m = new THREE.MeshStandardMaterial({
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color: "#FF0000"
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});
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fontMesh = new THREE.Mesh(text, m)
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fontMesh.position.y = 100;
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scene.add(fontMesh);
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});
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}
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// 创建LED电子屏幕
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function addLEDScreen() {
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var canvas = document.createElement("canvas");
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canvas.width = 512;
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canvas.height = 64;
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var c = canvas.getContext('2d');
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c.fillStyle = "#aaaaff";
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c.fillRect(0, 0, 512, 64);
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// 文字
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c.beginPath();
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c.translate(256, 32);
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c.fillStyle = "#FF0000"; //文本填充颜色
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c.font = "bold 28px 宋体"; //字体样式设置
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c.textBaseline = "middle"; //文本与fillText定义的纵坐标
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c.textAlign = "center"; //文本居中(以fillText定义的横坐标)
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c.fillText("左本的博客，Three.js3D文字", 0, 0);
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var cubeGeometry = new THREE.BoxGeometry(512, 64, 5);
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canvasTexture = new THREE.CanvasTexture(canvas);
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canvasTexture.wrapS = THREE.RepeatWrapping;
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var material = new THREE.MeshPhongMaterial({
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map: canvasTexture, // 设置纹理贴图
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});
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var cube = new THREE.Mesh(cubeGeometry, material);
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cube.rotation.y += Math.PI; //-逆时针旋转,+顺时针
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scene.add(cube);
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}
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var clock = new THREE.Clock(); //声明一个时钟对象
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function renderScene() {
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orbit.update();
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if (fontMesh) {
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fontMesh.rotation.y -= 0.004;
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}
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if (canvasTexture) {
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canvasTexture.offset.x += 0.005;
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}
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// 使用requestAnimationFrame函数进行渲染
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requestAnimationFrame(renderScene);
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renderer.render(scene, camera);
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}
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// 渲染的场景
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renderer.render(scene, camera);
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}
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window.onload = init;
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// 随着窗体的变化修改场景
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function onResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize(window.innerWidth, window.innerHeight);
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}
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// 监听窗体调整大小事件
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window.addEventListener('resize', onResize, false);
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</script>
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</body>
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</html>
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