原出處：http://hewebgl.com/article/getarticle/58
話說，原出處代碼居然還有文法錯誤，真是坑爹了，簡單修改了，不多說，上代碼，想說的都在注釋裡。
html5-canvas版本：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Three架構</title>
<script type="text/javascript" script src="three.js"></script>
<script type="text/javascript" script src="stats.min.js"></script>
<style type="text/css">
div#canvas-frame {
border: none;
cursor: pointer;
width: 100%;
height: 600px;
background-color: #EEEEEE;
}
</style>
<script>
var renderer;
var stats;
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.setClearColorHex(0xFFFFFF, 1.0);
//stats對象初始化
stats = new Stats();
stats.domElement.style.position = 'absolute'; //絕對坐标
stats.domElement.style.left = '0px';// (0,0)px,左上角
stats.domElement.style.top = '0px';
document.getElementById('canvas-frame').appendChild(stats.domElement);
}
var camera;
function initCamera() {
camera = new THREE.PerspectiveCamera(45, width / height, 1, 10000);
camera.position.x = 0;
camera.position.y = 0;
camera.position.z = 600;
camera.up.x = 0;//camera.up 設定相機的傾斜角度，歪着拿相機，照片自然也不是水準的
camera.up.y = 0;
camera.up.z = 0;
camera.lookAt({ //鏡頭看着哪裡呢？景物在動
x : 0,
y : 0,
z : 0
});
}
var scene;
function initScene() {
scene = new THREE.Scene();
}
var light;
function initLight() {
light = new THREE.PointLight(0x00FF00);
light.position.set(0, 0,300);
scene.add(light);
}
var cube;
var mesh;
function initObject() {
var geometry = new THREE.CylinderGeometry( 10,15,40);
var material = new THREE.MeshLambertMaterial( { color:0xFFFFFF} );
mesh = new THREE.Mesh( geometry,material);
mesh.position.x = 100;
mesh.position.y = 100;
mesh.position.z = 100;
scene.add(mesh);
}
function threeStart() {
initThree();
initCamera();
initScene();
initLight();
initObject();
animation();
}
function animation()
{
mesh.position.z+=1;
renderer.render(scene, camera);
requestAnimationFrame(animation);
stats.update();//這個函數真好用
}
</script>
</head>
<body οnlοad="threeStart();">
<div id="canvas-frame"></div>
</body>
</html>
随手順便改了個webgl格式的程式，本想對比下性能，奈何都能運作在60幀，對比失敗了。
<!DOCTYPE html>
<html >
<html>
<head>
<meta charset="UTF-8">
<title>Three架構</title>
<script type="text/javascript" script src="three.js"></script>
<script type="text/javascript" script src="stats.min.js"></script>
<style type="text/css">
div#canvas-frame {
border: none;
cursor: pointer;
width: 100%;
height: 600px;
background-color: #EEEEEE;
}
</style>
</head>
<body>
<script type = "text/javascript">
var renderer;
var stats;
function initThree() {
renderer = new THREE.WebGLRenderer({ antialias : true });
renderer.setSize(1000, 800);
document.body.appendChild (renderer.domElement );
renderer.setClearColorHex(0xFFFFFF, 1.0);
//stats對象初始化
stats = new Stats();
stats.domElement.style.position = 'absolute'; //絕對坐标
stats.domElement.style.left = '0px';// (0,0)px,左上角
stats.domElement.style.top = '0px';
document.body.appendChild( stats.domElement );
}
var camera;
function initCamera() {
camera = new THREE.PerspectiveCamera(45, 1000 / 800, 1, 10000);
camera.position.x = 0;
camera.position.y = 0;
camera.position.z = 600;
camera.up.x = 0;//camera.up 設定相機的傾斜角度，歪着拿相機，照片自然也不是水準的
camera.up.y = 0;
camera.up.z = 0;
camera.lookAt({ //鏡頭看着哪裡呢？景物在動
x : 0,
y : 0,
z : 0
});
}
var scene;
function initScene() {
scene = new THREE.Scene();
}
var light;
function initLight() {
light = new THREE.PointLight(0x00FF00);
light.position.set(0, 0,300);
scene.add(light);
}
var cube;
var mesh;
function initObject() {
var geometry = new THREE.CylinderGeometry( 10,15,40);
var material = new THREE.MeshLambertMaterial( { color:0xFFFFFF} );
mesh = new THREE.Mesh( geometry,material);
mesh.position.x = 100;
mesh.position.y = 100;
mesh.position.z = 100;
scene.add(mesh);
}
function animation()
{
mesh.position.z+=1;
renderer.render(scene, camera);
requestAnimationFrame(animation);
stats.update();//這個函數真好用
}
!function threeStart() {
initThree();
initCamera();
initScene();
initLight();
initObject();
animation();
}();
</script>
</body>
</html>
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