代码如下：
div#canvas-frame {
border: none;
cursor: pointer;
width: 100%;
height: 600px;
background-color: #EEEEEE;
}
<script>
var renderer;
function initThree() {
width = document.getElementById('canvas-frame').clientWidth;
height = document.getElementById('canvas-frame').clientHeight;
renderer = new THREE.WebGLRenderer({
antialias : true
});
renderer.setSize(width, height);
document.getElementById('canvas-frame').appendChild(renderer.domElement);
renderer.setClearColor(0xFFFFFF, 1.0);
}
var camera;
function initCamera() {
camera = new THREE.PerspectiveCamera(45, width / height, 1, 10000);
camera.position.x = 0;
camera.position.y = 500;
camera.position.z = 0;
camera.up.x = 0;
camera.up.y = 0;
camera.up.z = 1;
camera.lookAt(0, 0, 0);
}
var scene;
function initScene() {
scene = new THREE.Scene();
}
var light;
function initLight() {
light = new THREE.DirectionalLight(0xFFFFFF, 1.0, 0);
light.position.set(100, 100, 200);
scene.add(light);
}
function initObject() {
var geometry = new THREE.Geometry();
var material = new THREE.LineBasicMaterial( { vertexColors: true } );
var color1 = new THREE.Color( 0x000000 ), color2 = new THREE.Color( 0x000000 );
//var p1 = new THREE.Vector3(0, 0, 0 );
//var p2 = new THREE.Vector3(100, 0,100 );
var p1 = new THREE.Vector3(0, 0, 0 );
var p2 = new THREE.Vector3(0, 0,100 );
geometry.vertices.push(p1);
geometry.vertices.push(p2);
geometry.colors.push( color1, color2);
var line = new THREE.Line( geometry, material, THREE.LineSegments);
scene.add(line);
}
function threeStart() {
initThree();
initCamera();
initScene();
initLight();
initObject();
renderer.clear();
renderer.render(scene, camera);
}
</script>
<div id="canvas-frame"></div>
使用
//var p1 = new THREE.Vector3(0, 0, 0 );
//var p2 = new THREE.Vector3(100, 0,100 );
线不显示，是什么原因呢？
