今天简单给你们演示一下，如何绘制线条：javascript
代码示意：html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<script src="../build/three.js" type="text/javascript"></script>
</head>
<body>
<script type="text/javascript" >
// 老三样 场景scene，相机camera，渲染器render
var scene=new THREE.Scene();
// 相机
var camera = new THREE.PerspectiveCamera(45,1,1,1000);
camera.position.set(0,0,100);
camera.lookAt(new THREE.Vector3(0,0,0));
// 渲染器
var renderer=new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth,window.innerHeight);
//显示在窗体
document.body.appendChild(renderer.domElement);
//定义材质THREE.LineBasicMaterial . MeshBasicMaterial...均可以
var material = new THREE.LineBasicMaterial({color:0x0000ff});
// 空几何体，里面没有点的信息,不想BoxGeometry已经有一系列点，组成方形了。
var geometry = new THREE.Geometry();
// 给空白几何体添加点信息，这里写3个点，geometry会把这些点自动组合成线，面。
geometry.vertices.push(new THREE.Vector3(-10,0,0));
geometry.vertices.push(new THREE.Vector3(0,10,0));
geometry.vertices.push(new THREE.Vector3(0,5,0));
//线构造
var line=new THREE.Line(geometry,material);
// 加入到场景中
scene.add(line);
// 渲染
renderer.render(scene,camera);
</script>
</body>
</html>
java