1 <!DOCTYPE html> 2 <html> 3 <head lang="en"> 4 <meta charset="UTF-8"> 5 <title></title> 6 <script src="../js/three.js"></script> 7 </head> 8 <body onload="main()"> 9 <script> 10 function initTHREE(){ 11 width = window.innerWidth; 12 height = window.innerHeight; 13 renderer = new THREE.WebGLRenderer({ 14 antialias:true 15 }); 16 renderer.setSize(width,height); 17 renderer.setClearColor("white",1.0); 18 document.body.appendChild(renderer.domElement); 19 } 20 function initCamera(){ 21 camera = new THREE.PerspectiveCamera(45,width/height,1,1000); 22 camera.position.z = 30; 23 24 } 25 function initScene(){ 26 scene = new THREE.Scene(); 27 } 28 function initGeometry(){ 29 geometry = new THREE.Geometry(); 30 var material = new THREE.LineBasicMaterial({vertexColors:true}); 31 // var p1 = new THREE.Vector3(-10,0,0); 32 // var p2 = new THREE.Vector3(10,0,0); 33 // var p3 = new THREE.Vector3(0,10,0); 34 // var color1 = new THREE.Color(0xff0000); 35 // 36 // var color2 = new THREE.Color(0xff0000); 37 // var color3 = new THREE.Color(0xff0000); 38 // geometry.vertices.push(p1,p2,p3,p1); 39 // geometry.colors.push(color1,color2,color3,color1); 40 /*LineStrip表示绘制线的时候会按照你几何体push进去的点的顺序进行绘制，如上会是p1->p2->p3->p1 41 其中你的点有多少个，就必须有多少个color值，color值可以为之前定义过的color 42 */ 43 // var triangle = new THREE.Line(geometry,material,THREE.LineStrip); 44 var p1 = new THREE.Vector3(-10,0,0); 45 var p2 = new THREE.Vector3(10,0,0); 46 var p3 = new THREE.Vector3(0,10,0); 47 var color1 = new THREE.Color(0xff0000); 48 var color2 = new THREE.Color(0xff0000); 49 var color3 = new THREE.Color(0xff0000); 50 geometry.vertices.push(p1,p2,p2,p3,p3,p1); 51 geometry.colors.push(color1,color2,color3,color1,color1,color1); 52 /* 53 LinePieces表示每相邻的两个点连成一条线，其中相邻的两个点是由我们自己定义的，如上面的代码 54 p1->p2 p2->p3 p3->p1 55 这样，三条线连起来就是一个三角形，注意，颜色要和点相对应 56 */ 57 var triangle = new THREE.Line(geometry,material,THREE.LinePieces); 58 scene.add(triangle); 59 } 60 function main(){ 61 initTHREE(); 62 initCamera(); 63 initScene(); 64 initGeometry(); 65 //会按照上方我们定义的renderer.setClearColor来清除画布，如果不重复渲染的话，那么这个函数可要可不要 66 renderer.clear(); 67 renderer.render(scene,camera); 68 } 69 </script> 70 </body> 71 </html>
原文：http://www.cnblogs.com/hzStudy/p/7712627.html