30-THREE.JS 圆环
<!DOCTYPE html> <html> <head> <title>Example 05.03 - Basic 2D geometries - Ring</title> <script src="https://cdn.bootcss.com/three.js/r67/three.js"></script> <script src="https://cdn.bootcss.com/stats.js/r10/Stats.min.js"></script> <script type="text/javascript" src="https://cdn.bootcss.com/dat-gui/0.7.3/dat.gui.js"></script> <style> body { margin: 0; overflow: hidden; } </style> </head> <body> <div id="Stats-output"> </div> <div id="WebGL-output"> </div> <script type="text/javascript"> // 初始化 function init() { var stats = initStats(); // 创建一个场景 var scene = new THREE.Scene(); // 创建一个相机 var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000); // 创建一个渲染器 var webGLRenderer = new THREE.WebGLRenderer(); webGLRenderer.setClearColor(new THREE.Color(0xEEEEEE, 1.0)); webGLRenderer.setSize(window.innerWidth, window.innerHeight); webGLRenderer.shadowMapEnabled = true; var torus = createMesh(new THREE.RingGeometry()); // 把形状添加到场景中去 scene.add(torus); // 设置相机坐标 和 朝向 camera.position.x = -30; camera.position.y = 40; camera.position.z = 50; camera.lookAt(new THREE.Vector3(10, 0, 0)); // 把渲染后的结果添加到DOM元素中去 document.getElementById("WebGL-output").appendChild(webGLRenderer.domElement); var step = 0; var controls = new function () { this.innerRadius = 0; this.outerRadius = 50; this.thetaSegments = 8; this.phiSegments = 8; this.thetaStart = 0; this.thetaLength = Math.PI * 2; this.redraw = function () { scene.remove(torus); torus = createMesh(new THREE.RingGeometry(controls.innerRadius, controls.outerRadius, controls.thetaSegments, controls.phiSegments, controls.thetaStart, controls.thetaLength)); scene.add(torus); }; }; var gui = new dat.GUI(); gui.add(controls, 'innerRadius', 0, 40).onChange(controls.redraw); gui.add(controls, 'outerRadius', 0, 100).onChange(controls.redraw); gui.add(controls, 'thetaSegments', 1, 40).step(1).onChange(controls.redraw); gui.add(controls, 'phiSegments', 1, 20).step(1).onChange(controls.redraw); gui.add(controls, 'thetaStart', 0, Math.PI * 2).onChange(controls.redraw); gui.add(controls, 'thetaLength', 0, Math.PI * 2).onChange(controls.redraw); render(); function createMesh(geom) { // 申请两种材质 var meshMaterial = new THREE.MeshNormalMaterial(); meshMaterial.side = THREE.DoubleSide; var wireFrameMat = new THREE.MeshBasicMaterial(); wireFrameMat.wireframe = true; // 创建多材质图形 var mesh = THREE.SceneUtils.createMultiMaterialObject(geom, [meshMaterial, wireFrameMat]); return mesh; } function render() { stats.update(); torus.rotation.y = step += 0.01; requestAnimationFrame(render); webGLRenderer.render(scene, camera); } function initStats() { var stats = new Stats(); stats.setMode(0); // 0: fps, 1: ms stats.domElement.style.position = 'absolute'; stats.domElement.style.left = '0px'; stats.domElement.style.top = '0px'; document.getElementById("Stats-output").appendChild(stats.domElement); return stats; } } window.onload = init; </script> </body> </html>