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portrait.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<meta name="description" content="展示一些样例,写一些书籍,干点啥好呢,gy的网站">
<meta name="keywords" content="three.js,demos,canvas,webgl,tricks,前端,guoyang,gy134340,web">
<link rel="icon" href="img/icon/favicon.png">
<link rel="stylesheet" href="css/reset.css">
<style>
.container{
width: 100%;
height: 100%;
position: relative;
}
.message{
position: absolute;
z-index: 999;
color:#fff;
font-size: 16px;
-webkit-transform:translate(-50%, -50%);
transform: translate(-50%, -50%);
}
.title{
color:#fff;
position: absolute;
font-size: 20px;
top:10px;
-webkit-transform:translateX(-50%);
transform: translateX(-50%);
left:50%;
width: auto;
margin: 0 auto;
}
canvas{
display:block;
position: fixed;
left:0;
top:0;
z-index: 99;
}
#num_img{
display: none;
}
</style>
</head>
<body>
<div class="container">
<p class="title"> Trump</p>
<img id ="num_img" src="img/cp.jpg" alt="">
</div>
</body>
<script src="js/three.min.js"></script>
<script src="js/renderers/Projector.js"></script>
<script src="js/renderers/CanvasRenderer.js"></script>
<script src='js/TrackballControls.js'></script>
<script src="js/stats.min.js"></script>
<script src='js/tween.min.js'></script>
<script src="js/RequestAnimationFrame.js"></script>
<script type="text/javascript">
var container,stats;
var canvas,canvasWidth,canvasHeight;
var camera,scene,renderer,controls;
var raycaster; // 点击发出的一条射线
var imgData,numData = [];
var mouse = new THREE.Vector2(); // 点向量
var cp = [];
var glImg;
var winWidth = window.innerWidth;
var winHeight = window.innerHeight;
mouse.x = 0;
mouse.y = 0;
function init () {
container = document.querySelectorAll('.container')[0];
glImg = document.getElementById('num_img');
scene = new THREE.Scene();
// 相机
camera = new THREE.PerspectiveCamera(60, winWidth / winHeight, 1, 10000);
camera.position.set(0, 0, 1500);
camera.lookAt(0, 0, 0);
// 光
var light = new THREE.AmbientLight(0x404040);
scene.add(light);
// renderer
renderer = new THREE.WebGLRenderer( {antialias: true} );
renderer.setClearColor(0x333333);
renderer.setPixelRatio(window.devivePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
container.append(renderer.domElement);
// 统计
stats = new Stats();
container.appendChild(stats.dom);
// 控制器
controls = new THREE.TrackballControls( camera, renderer.domElement );
controls.speed = 5;
controls.noPan = false;
controls.noZoom = false;
controls.rotateSpeed = 1.0;
controls.zoomSpeed = 1.2;
controls.panSpeed = 0.8;
controls.staticMoving = true;
controls.dynamicDampingFactor = 0.3;
canvas = document.createElement('canvas');
canvas.style.display = 'none';
canvasWidth = glImg.naturalWidth;
canvasHeight = glImg.naturalHeight;
canvas.setAttribute('width', canvasWidth);
canvas.setAttribute('height', canvasHeight);
var context = canvas.getContext('2d');
context.drawImage(glImg, 0, 0, canvasWidth, canvasHeight)
container.append(canvas);
getImageData(context, canvasWidth, canvasHeight); // 获取img小块数据
// console.log('numData',numData);
setSprites(canvasWidth, canvasHeight);
// helper
var axisHelper = new THREE.AxisHelper( 1000 );
scene.add( axisHelper );
var gridHelper = new THREE.GridHelper( 100, 100 );
scene.add( gridHelper );
window.addEventListener( 'resize', onWindowResize, false );
}
// 470 * 300
function getImageData(context, imgWidth, imgHeight){
var tmpWidth = imgWidth-1;
var tmpHeight = imgHeight-1;
for(var i = 0; i < tmpWidth; i += 2 ){
for(var j = 0; j < tmpHeight; j += 2){
var dt = context.getImageData(i, j, 1, 1);
var rate = getThresh(dt);
numData.push(rate);
}
}
}
function setSprites (canvasWidth, canvasHeight) {
for(var i = 0; i < canvasWidth; i+=2){
for(var j = 0; j < canvasHeight; j+=2){
var color = numData[i/2 * canvasHeight+ j/2];
if(color !== undefined){
grey = color.toString(16);
greyAll = '#'+ grey + grey + grey ;
var spriteMaterial = new THREE.SpriteMaterial( {color:greyAll});
var sprite = new THREE.Sprite( spriteMaterial );
var z = Math.sin(j/8) * 20;
sprite.position.set(-(i-canvasWidth/4)*10, -(j-canvasHeight/2)*5, z);
sprite.scale.x = sprite.scale.y = sprite.scale.z = 10;
cp.push(sprite);
scene.add( sprite );
}
}
}
}
function flowSprite(){
for(var i = 0; i < canvasWidth; i+=2){
for(var j = 0; j < canvasHeight; j+=2){
var tmp = cp[i/2*canvasHeight + j/2];
if(tmp){
if(tmp.position.z <= 20){
tmp.position.z += Math.random()*2;
}else{
tmp.position.z -= 40;
}
}
}
}
}
// 获取每个块的颜色相加值
function getThresh( dt ){
var data = dt.data;
tmp = (data[1] + data[2] + data[3]) / 3;
return parseInt(tmp);
}
function render(){
flowSprite();
camera.lookAt(scene.position);
camera.updateProjectionMatrix();
renderer.render(scene, camera);
}
function animate () {
requestAnimationFrame(animate);
render();
TWEEN.update();
stats.update();
controls.update();
}
window.onload = function(){
init();
animate();
}
function onWindowResize(){
renderer.setPixelRatio( window.devicePixelRatio );
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function fastAbs(value){
return (value ^ (value >> 31)) - (value >> 31);
}
function threshold(value){
return (value > 0x15) ? 0xFF : 0;
}
</script>
</html>