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HTML+CSS+JavaScript实现图片3D展览的示例代码
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一、图片3D展览效果

上传图片的大小有限制，录制的GIF图展示效果不是很好

HTML+CSS+JavaScript实现图片3D展览的示例代码

录屏的效果见链接：https://www.bilibili.com/video/BV1Bi4y1E7wk/

二、代码实现

1. HTML代码

<!DOCTYPE HTML>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <meta name="HandheldFriendly" content="true">
    <meta name="description" content="图片3D展览屋">
    <meta name="keywords" content="canvas,3D_picture,perspective,texturing,gallery">
    <link href="res/slider-wb.css" rel="stylesheet">
    <title>图片3D展览屋</title>
    <style>
        html
        {
            overflow:visible;
            -ms-touch-action: none;
            -ms-content-zooming: none;
        }
        body
        {
            position: absolute;
            margin: 0px;
            padding: 0px;
            background: #fff;
            width: 100%;
            height: 100%;
        }
        #canvas
        {
            position: absolute;
            width: 100%;
            height: 100%;
            background: #fff;
        }
    </style>
    <script type="text/javascript" src="res/ge1doot.js"></script>
    <script type="text/javascript">

        "use strict";

        (function () {
            /* ==== definitions ==== */
            var diapo = [], layers = [], ctx, pointer, scr, camera, light, fps = 0, quality = [1, 2],
            // ---- poly constructor ----
	Poly = function (parent, face) {
	    this.parent = parent;
	    this.ctx = ctx;
	    this.color = face.fill || false;
	    this.points = [];
	    if (!face.img) {
	        // ---- create points ----
	        for (var i = 0; i < 4; i++) {
	            this.points[i] = new ge1doot.transform3D.Point(
					parent.pc.x + (face.x[i] * parent.normalZ) + (face.z[i] * parent.normalX),
					parent.pc.y + face.y[i],
					parent.pc.z + (face.x[i] * parent.normalX) + (-face.z[i] * parent.normalZ)
				);
	        }
	        this.points[3].next = false;
	    }
	},
            // ---- diapo constructor ----
	Diapo = function (path, img, structure) {
	    // ---- create image ----
	    this.img = new ge1doot.transform3D.Image(
			this, path + img.img, 1, {
			    isLoaded: function (img) {
			        img.parent.isLoaded = true;
			        img.parent.loaded(img);
			    }
			}
		);
	    this.visible = false;
	    this.normalX = img.nx;
	    this.normalZ = img.nz;
	    // ---- point center ----
	    this.pc = new ge1doot.transform3D.Point(img.x, img.y, img.z);
	    // ---- target positions ----
	    this.tx = img.x + (img.nx * Math.sqrt(camera.focalLength) * 20);
	    this.tz = img.z - (img.nz * Math.sqrt(camera.focalLength) * 20);
	    // ---- create polygons ----
	    this.poly = [];
	    for (var i = -1, p; p = structure[++i]; ) {
	        layers[i] = (p.img === true ? 1 : 2);
	        this.poly.push(
				new Poly(this, p)
			);
	    }
	},
            // ---- init section ----
	init = function (json) {
	    // draw poly primitive
	    Poly.prototype.drawPoly = ge1doot.transform3D.drawPoly;
	    // ---- init screen ----
	    scr = new ge1doot.Screen({
	        container: "canvas"
	    });
	    ctx = scr.ctx;
	    scr.resize();
	    // ---- init pointer ----
	    pointer = new ge1doot.Pointer({
	        tap: function () {
	            if (camera.over) {
	                if (camera.over === camera.target.elem) {
	                    // ---- return to the center ----
	                    camera.target.x = 0;
	                    camera.target.z = 0;
	                    camera.target.elem = false;
	                } else {
	                    // ---- goto diapo ----
	                    camera.target.elem = camera.over;
	                    camera.target.x = camera.over.tx;
	                    camera.target.z = camera.over.tz;
	                    // ---- adapt tesselation level to distance ----
	                    for (var i = 0, d; d = diapo[i++]; ) {
	                        var dx = camera.target.x - d.pc.x;
	                        var dz = camera.target.z - d.pc.z;
	                        var dist = Math.sqrt(dx * dx + dz * dz);
	                        var lev = (dist > 1500) ? quality[0] : quality[1];
	                        d.img.setLevel(lev);
	                    }
	                }
	            }
	        }
	    });
	    // ---- init camera ----
	    camera = new ge1doot.transform3D.Camera({
	        focalLength: Math.sqrt(scr.width) * 10,
	        easeTranslation: 0.025,
	        easeRotation: 0.06,
	        disableRz: true
	    }, {
	        move: function () {
	            this.over = false;
	            // ---- rotation ----
	            if (pointer.isDraging) {
	                this.target.elem = false;
	                this.target.ry = -pointer.Xi * 0.01;
	                this.target.rx = (pointer.Y - scr.height * 0.5) / (scr.height * 0.5);
	            } else {
	                if (this.target.elem) {
	                    this.target.ry = Math.atan2(
							this.target.elem.pc.x - this.x,
							this.target.elem.pc.z - this.z
						);
	                }
	            }
	            this.target.rx *= 0.9;
	        }
	    });
	    camera.z = -10000;
	    camera.py = 0;
	    // ---- create images ----
	    for (var i = 0, img; img = json.imgdata[i++]; ) {
	        diapo.push(
				new Diapo(
					json.options.imagesPath,
					img,
					json.structure
				)
			);
	    }
	    // ---- start engine ---- >
	    setInterval(function () {
	        quality = (fps > 50) ? [2, 3] : [1, 2];
	        fps = 0;
	    }, 1000);
	    run();
	},
            // ---- main loop ----
	run = function () {
	    // ---- clear screen ----
	    ctx.clearRect(0, 0, scr.width, scr.height);
	    // ---- camera ----
	    camera.move();
	    // ---- draw layers ----
	    for (var k = -1, l; l = layers[++k]; ) {
	        light = false;
	        for (var i = 0, d; d = diapo[i++]; ) {
	            (l === 1 && d.draw()) ||
				(d.visible && d.poly[k].draw());
	        }
	    }
	    // ---- cursor ----
	    if (camera.over && !pointer.isDraging) {
	        scr.setCursor("pointer");
	    } else {
	        scr.setCursor("move");
	    }
	    // ---- loop ----
	    fps++;
	    requestAnimFrame(run);
	};
            /* ==== prototypes ==== */
            Poly.prototype.draw = function () {
                // ---- color light ----
                var c = this.color;
                if (c.light || !light) {
                    var s = c.light ? this.parent.light : 1;
                    // ---- rgba color ----
                    light = "rgba(" +
				Math.round(c.r * s) + "," +
				Math.round(c.g * s) + "," +
				Math.round(c.b * s) + "," + (c.a || 1) + ")";
                    ctx.fillStyle = light;
                }
                // ---- paint poly ----
                if (!c.light || this.parent.light < 1) {
                    // ---- projection ----
                    for (
				var i = 0;
				this.points[i++].projection();
			);
                    this.drawPoly();
                    ctx.fill();
                }
            }
            /* ==== image onload ==== */
            Diapo.prototype.loaded = function (img) {
                // ---- create points ----
                var d = [-1, 1, 1, -1, 1, 1, -1, -1];
                var w = img.texture.width * 0.5;
                var h = img.texture.height * 0.5;
                for (var i = 0; i < 4; i++) {
                    img.points[i] = new ge1doot.transform3D.Point(
				this.pc.x + (w * this.normalZ * d[i]),
				this.pc.y + (h * d[i + 4]),
				this.pc.z + (w * this.normalX * d[i])
			);
                }
            }
            /* ==== images draw ==== */
            Diapo.prototype.draw = function () {
                // ---- visibility ----
                this.pc.projection();
                if (this.pc.Z > -(camera.focalLength  1) && this.img.transform3D(true)) {
                    // ---- light ----
                    this.light = 0.5 + Math.abs(this.normalZ * camera.cosY - this.normalX * camera.sinY) * 0.6;
                    // ---- draw image ----
                    this.visible = true;
                    this.img.draw();
                    // ---- test pointer inside ----
                    if (pointer.hasMoved || pointer.isDown) {
                        if (
					this.img.isPointerInside(
						pointer.X,
						pointer.Y
					)
				) camera.over = this;
                    }
                } else this.visible = false;
                return true;
            }
            return {
                // --- load data ----
                load: function (data) {
                    window.addEventListener('load', function () {
                        ge1doot.loadJS(
					"res/imageTransform3D.js",
					init, data
				);
                    }, false);
                }
            }
        })().load({
            imgdata: [
            // north
		{img: 'imgs/001.jpg', x: -1000, y: 0, z: 1500, nx: 0, nz: 1 },
		{ img: 'imgs/002.jpg', x: 0, y: 0, z: 1500, nx: 0, nz: 1 },
		{ img: 'imgs/003.jpg', x: 1000, y: 0, z: 1500, nx: 0, nz: 1 },
            // east
		{img: 'imgs/004.jpg', x: 1500, y: 0, z: 1000, nx: -1, nz: 0 },
		{ img: 'imgs/005.jpg', x: 1500, y: 0, z: 0, nx: -1, nz: 0 },
		{ img: 'imgs/006.jpg', x: 1500, y: 0, z: -1000, nx: -1, nz: 0 },
            // south
		{img: 'imgs/007.jpg', x: 1000, y: 0, z: -1500, nx: 0, nz: -1 },
		{ img: 'imgs/008.jpg', x: 0, y: 0, z: -1500, nx: 0, nz: -1 },
		{ img: 'imgs/009.jpg', x: -1000, y: 0, z: -1500, nx: 0, nz: -1 },
            // west
		{img: 'imgs/010.jpg', x: -1500, y: 0, z: -1000, nx: 1, nz: 0 },
		{ img: 'imgs/011.jpg', x: -1500, y: 0, z: 0, nx: 1, nz: 0 },
		{ img: 'imgs/012.jpg', x: -1500, y: 0, z: 1000, nx: 1, nz: 0 }
	],
            structure: [
		{
		    // wall
		    fill: { r: 255, g: 255, b: 255, light: 1 },
		    x: [-1001, -490, -490, -1001],
		    z: [-500, -500, -500, -500],
		    y: [500, 500, -500, -500]
		}, {
		    // wall
		    fill: { r: 255, g: 255, b: 255, light: 1 },
		    x: [-501, 2, 2, -500],
		    z: [-500, -500, -500, -500],
		    y: [500, 500, -500, -500]
		}, {
		    // wall
		    fill: { r: 255, g: 255, b: 255, light: 1 },
		    x: [0, 502, 502, 0],
		    z: [-500, -500, -500, -500],
		    y: [500, 500, -500, -500]
		}, {
		    // wall
		    fill: { r: 255, g: 255, b: 255, light: 1 },
		    x: [490, 1002, 1002, 490],
		    z: [-500, -500, -500, -500],
		    y: [500, 500, -500, -500]
		}, {
		    // shadow
		    fill: { r: 0, g: 0, b: 0, a: 0.2 },
		    x: [-420, 420, 420, -420],
		    z: [-500, -500, -500, -500],
		    y: [150, 150, -320, -320]
		}, {
		    // shadow
		    fill: { r: 0, g: 0, b: 0, a: 0.2 },
		    x: [-20, 20, 20, -20],
		    z: [-500, -500, -500, -500],
		    y: [250, 250, 150, 150]
		}, {
		    // shadow
		    fill: { r: 0, g: 0, b: 0, a: 0.2 },
		    x: [-20, 20, 20, -20],
		    z: [-500, -500, -500, -500],
		    y: [-320, -320, -500, -500]
		}, {
		    // shadow
		    fill: { r: 0, g: 0, b: 0, a: 0.2 },
		    x: [-20, 20, 10, -10],
		    z: [-500, -500, -100, -100],
		    y: [-500, -500, -500, -500]
		}, {
		    // base
		    fill: { r: 32, g: 32, b: 32 },
		    x: [-50, 50, 50, -50],
		    z: [-150, -150, -50, -50],
		    y: [-500, -500, -500, -500]
		}, {
		    // support
		    fill: { r: 16, g: 16, b: 16 },
		    x: [-10, 10, 10, -10],
		    z: [-100, -100, -100, -100],
		    y: [300, 300, -500, -500]
		}, {
		    // frame
		    fill: { r: 255, g: 255, b: 255 },
		    x: [-320, -320, -320, -320],
		    z: [0, -20, -20, 0],
		    y: [-190, -190, 190, 190]
		}, {
		    // frame
		    fill: { r: 255, g: 255, b: 255 },
		    x: [320, 320, 320, 320],
		    z: [0, -20, -20, 0],
		    y: [-190, -190, 190, 190]
		},
		{ img: true },
		{
		    // ceilingLight
		    fill: { r: 255, g: 128, b: 0 },
		    x: [-50, 50, 50, -50],
		    z: [450, 450, 550, 550],
		    y: [500, 500, 500, 500]
		}, {
		    // groundLight
		    fill: { r: 255, g: 128, b: 0 },
		    x: [-50, 50, 50, -50],
		    z: [450, 450, 550, 550],
		    y: [-500, -500, -500, -500]
		}
	],
            options: {
                imagesPath: ""
            }
        });
</script>
</head>
<body>
<a href="https://blog.csdn.net/fyfugoyfa/article/details/108845194" target="_blank">CSDN文章</a><br />
    <canvas id="canvas">建议用谷歌浏览器打开</canvas>
</body>
</html>

2. CSS代码

#icon {
	background: rgb(255, 144, 0); border-radius: 6px 0px 0px; transition:0.6s ease-in-out; left: 65px; top: 6px; width: 40px; height: 40px; overflow: hidden; position: relative; cursor: pointer; -moz-transition: all 0.6s ease-in-out 0s; -webkit-transition: all 0.6s ease-in-out 0s; -o-transition: all 0.6s ease-in-out 0s;
}
#icon div {
	background: none; position: absolute;
}
#icon div:nth-child(1) {
	border-width: 7px 0px 7px 8px; border-style: solid; border-color: transparent rgb(255, 255, 255); left: 20px; top: 50%; width: 0px; height: 0px; margin-top: -7px; position: absolute;
}
#icon div:nth-child(2) {
	background: rgb(255, 255, 255); left: 12px; top: 50%; width: 8px; height: 6px; margin-top: -3px; position: absolute;
}
#nav {
	top: 10px; width: 100px; height: 0px; position: absolute; -ms-user-select: none; -webkit-user-select: none; -moz-user-select: none;
}
#nav-switch {
	display: none;
}
#nav .label {
	display: block; cursor: pointer;
}
#nav .container {
	transition:left 0.3s ease-in-out; left: -100px; width: 100%; position: absolute; -moz-transition: left 0.3s ease-in-out 0s; -webkit-transition: left 0.3s ease-in-out 0s; -o-transition: left 0.3s ease-in-out 0s;
}
#nav .container > div {
	padding: 0px; width: 50%; float: left;
}
#nav .container .nav-on {
	color: rgb(51, 51, 51); padding-left: 0px;
}
#nav .container .nav-off {
	width: 40px; height: 40px; padding-right: 10px;
}
:checked#nav-switch + .label .container {
	left: 10px;
}
:checked#nav-switch + .label #icon {
	background: rgb(0, 101, 203); border-radius: 0px 0px 6px; transform: rotate(-180deg); -webkit-transform: rotate(-180deg); -moz-transform: rotate(-180deg); -o-transform: rotate(-180deg);
}
.title {
	margin: 0px; padding: 0px; left: 170px; top: 2px; height: 40px; color: rgb(51, 51, 51); line-height: 40px; font-family: "Segoe UI Light", "Segoe UI", Frutiger, "Frutiger Linotype", "Dejavu Sans", "Helvetica Neue", Arial, sans-serif; font-size: 24px; font-weight: bold; white-space: nowrap; position: absolute; -ms-user-select: none; -webkit-user-select: none; -moz-user-select: none; -o-user-select: none; user-select: none;
}
.menu {
	margin: 0px; padding: 0px; left: 0px; top: 6px; color: rgb(51, 51, 51); font-family: "Segoe UI Light", "Segoe UI", Frutiger, "Frutiger Linotype", "Dejavu Sans", "Helvetica Neue", Arial, sans-serif; font-size: 1em; font-weight: lighter; list-style-type: none; position: relative; cursor: pointer;
}
.menu li {
	list-style: none; width: 100px; height: 40px; border-right-color: rgb(221, 221, 221); border-right-width: 1px; border-right-style: solid; position: relative; cursor: pointer;
}
.menu a {
	color: rgb(51, 51, 51); line-height: 40px; padding-left: 40px; text-decoration: none; display: block; position: relative;
}
.menu li a:hover {
	background: rgb(255, 144, 0);
}
.menu li a:focus {
	background: rgb(255, 144, 0);
}
.menu li a:active {
	background: rgb(255, 144, 0);
}
#nav li::before {
	top: 50%; margin-left: 10px; position: absolute; content: "";
}
#nav li::after {
	top: 50%; margin-left: 10px; position: absolute; content: "";
}
#nav li a::before {
	top: 50%; margin-left: 10px; position: absolute; content: "";
}
#nav li a::after {
	top: 50%; margin-left: 10px; position: absolute; content: "";
}
#nav .home a::before {
	border-width: 8px 7px; border-style: solid; border-color: transparent transparent rgb(51, 51, 51); left: 2px; margin-top: -16px;
}
#nav .home a::after {
	border-width: 3px 4px 0px; border-style: solid; border-color: rgb(51, 51, 51) rgb(51, 51, 51) transparent; left: 4px; width: 2px; height: 4px; margin-top: 0px;
}
#nav .arrow a::before {
	border-width: 7px 0px 7px 8px; border-style: solid; border-color: transparent rgb(51, 51, 51); left: 8px; margin-top: -7px;
}
#nav .arrow a::after {
	background: rgb(51, 51, 51); left: 0px; width: 8px; height: 6px; margin-top: -3px;
}
#nav .back.arrow a::before {
	border-width: 7px 8px 7px 0px; left: 0px;
}
#nav .back.arrow a::after {
	left: 8px;
}
#nav .list a::before {
	background: none; border-width: 6px 0px; border-style: double; border-color: rgb(51, 51, 51); left: 5px; top: 14px; width: 12px; height: 2px;
}
#nav .list a::after {
	background: none; border-width: 6px 0px; border-style: double; border-color: rgb(51, 51, 51); left: 1px; top: 14px; width: 2px; height: 2px;
}

3. JavaScript代码

// ===== ge1doot global =====    js文件1
var ge1doot = ge1doot || {
	json: null,
	screen: null,
	pointer: null,
	camera: null,
	loadJS: function (url, callback, data) {
		if (typeof url == "string") url = [url];
		var load = function (src) {
			var script = document.createElement("script");
				if (callback) {
					if (script.readyState){
						script.onreadystatechange = function () {
							if (script.readyState == "loaded" || script.readyState == "complete"){
								script.onreadystatechange = null;
								if (--n === 0) callback(data || false);
							}
						}
					} else {
						script.onload = function() {
							if (--n === 0) callback(data || false);
						}
					}
				}
				script.src = src;
				document.getElementsByTagName("head")[0].appendChild(script);
		}
		for (var i = 0, n = url.length; i < n; i++) load(url[i]);
	}
}

// ===== html/canvas container =====
ge1doot.Screen = function (setup) {
	ge1doot.screen = this;
	this.elem = document.getElementById(setup.container) || setup.container;
	this.ctx = this.elem.tagName == "CANVAS" ? this.elem.getContext("2d") : false;
	this.style = this.elem.style;
	this.left = 0;
	this.top = 0;
	this.width = 0;
	this.height = 0;
	this.cursor = "default";
	this.setup = setup;
	this.resize = function () {
		var o = this.elem;
		this.width  = o.offsetWidth;
		this.height = o.offsetHeight;
		for (this.left = 0, this.top = 0; o != null; o = o.offsetParent) {
			this.left += o.offsetLeft;
			this.top  += o.offsetTop;
		}
		if (this.ctx) {
			this.elem.width  = this.width;
			this.elem.height = this.height;
		}
		this.setup.resize && this.setup.resize();
	}
	this.setCursor = function (type) {
		if (type !== this.cursor && 'ontouchstart' in window === false) {
			this.cursor = type;
			this.style.cursor = type;
		}
	}
	window.addEventListener('resize', function () {
		ge1doot.screen.resize();
	}, false);
	!this.setup.resize && this.resize();
}

// ==== unified touch events handler ====
ge1doot.Pointer = function (setup) {
	ge1doot.pointer = this;
	var self        = this;
	var body        = document.body;
	var html        = document.documentElement;
	this.setup      = setup;
	this.screen     = ge1doot.screen;
	this.elem       = this.screen.elem;
	this.X          = 0;
	this.Y          = 0;
	this.Xi         = 0;
	this.Yi         = 0;
	this.bXi        = 0;
	this.bYi        = 0;
	this.Xr         = 0;
	this.Yr         = 0;
	this.startX     = 0;
	this.startY     = 0;
	this.scale      = 0;
	this.wheelDelta = 0;
	this.isDraging  = false;
	this.hasMoved   = false;
	this.isDown     = false;
	this.evt        = false;
	var sX          = 0;
	var sY          = 0;
	// prevent default behavior
	if (setup.tap) this.elem.onclick = function () { return false; }
	if (!setup.documentMove) {
		document.ontouchmove = function(e) { e.preventDefault(); }
	}
	document.addEventListener("MSHoldVisual", function(e) { e.preventDefault(); }, false);
	if (typeof this.elem.style.msTouchAction != 'undefined') this.elem.style.msTouchAction = "none";

	this.pointerDown = function (e) {
		if (!this.isDown) {
			if (this.elem.setCapture) this.elem.setCapture();
			this.isDraging = false;
			this.hasMoved = false;
			this.isDown = true;
			this.evt = e;
			this.Xr = (e.clientX !== undefined ? e.clientX : e.touches[0].clientX);
			this.Yr = (e.clientY !== undefined ? e.clientY : e.touches[0].clientY);
			this.X  = sX = this.Xr - this.screen.left;
			this.Y  = sY = this.Yr - this.screen.top + ((html && html.scrollTop) || body.scrollTop);
			this.setup.down && this.setup.down(e);
		}
	}
	this.pointerMove = function(e) {
		this.Xr = (e.clientX !== undefined ? e.clientX : e.touches[0].clientX);
		this.Yr = (e.clientY !== undefined ? e.clientY : e.touches[0].clientY);
		this.X  = this.Xr - this.screen.left;
		this.Y  = this.Yr - this.screen.top + ((html && html.scrollTop) || body.scrollTop);
		if (this.isDown) {
			this.Xi = this.bXi + (this.X - sX);
			this.Yi = this.bYi - (this.Y - sY);
		}
		if (Math.abs(this.X - sX) > 11 || Math.abs(this.Y - sY) > 11) {
			this.hasMoved = true;
			if (this.isDown) {
				if (!this.isDraging) {
					this.startX = sX;
					this.startY = sY;
					this.setup.startDrag && this.setup.startDrag(e);
					this.isDraging = true;
				} else {
					this.setup.drag && this.setup.drag(e);
				}
			} else {
				sX = this.X;
				sY = this.Y;
			}
		}
		this.setup.move && this.setup.move(e);
	}
	this.pointerUp = function(e) {
		this.bXi = this.Xi;
		this.bYi = this.Yi;
		if (!this.hasMoved) {
			this.X = sX;
			this.Y = sY;
			this.setup.tap && this.setup.tap(this.evt);
		} else {
			this.setup.up && this.setup.up(this.evt);
		}
		this.isDraging = false;
		this.isDown = false;
		this.hasMoved = false;
		this.setup.up && this.setup.up(this.evt);
		if (this.elem.releaseCapture) this.elem.releaseCapture();
		this.evt = false;
	}
	this.pointerCancel = function(e) {
		if (this.elem.releaseCapture) this.elem.releaseCapture();
		this.isDraging = false;
		this.hasMoved = false;
		this.isDown = false;
		this.bXi = this.Xi;
		this.bYi = this.Yi;
		sX = 0;
		sY = 0;
	}
	if ('ontouchstart' in window) {
		this.elem.ontouchstart      = function (e) { self.pointerDown(e); return false;  }
		this.elem.ontouchmove       = function (e) { self.pointerMove(e); return false;  }
		this.elem.ontouchend        = function (e) { self.pointerUp(e); return false;    }
		this.elem.ontouchcancel     = function (e) { self.pointerCancel(e); return false;}
	}
	document.addEventListener("mousedown", function (e) {
		if (
			e.target === self.elem || 
			(e.target.parentNode && e.target.parentNode === self.elem) || 
			(e.target.parentNode.parentNode && e.target.parentNode.parentNode === self.elem)
		) {
			if (typeof e.stopPropagation != "undefined") {
				e.stopPropagation();
			} else {
				e.cancelBubble = true;
			}
			e.preventDefault();
			self.pointerDown(e); 
		}
	}, false);
	document.addEventListener("mousemove", function (e) { self.pointerMove(e); }, false);
	document.addEventListener("mouseup",   function (e) {
		self.pointerUp(e);
	}, false);
	document.addEventListener('gesturechange', function(e) {
		e.preventDefault();
		if (e.scale > 1) self.scale = 0.1; else if (e.scale < 1) self.scale = -0.1; else self.scale = 0;
		self.setup.scale && self.setup.scale(e);
		return false;
	}, false);
	if (window.navigator.msPointerEnabled) {
		var nContact = 0;
		var myGesture = new MSGesture();
		myGesture.target = this.elem;
		this.elem.addEventListener("MSPointerDown", function(e) {
			if (e.pointerType == e.MSPOINTER_TYPE_TOUCH) {
				myGesture.addPointer(e.pointerId);
				nContact++;
			}
		}, false);
		this.elem.addEventListener("MSPointerOut", function(e) {
			if (e.pointerType == e.MSPOINTER_TYPE_TOUCH) {
				nContact--;
			}
		}, false);
		this.elem.addEventListener("MSGestureHold", function(e) {
			e.preventDefault();
		}, false);
		this.elem.addEventListener("MSGestureChange", function(e) {
			if (nContact > 1) {
				if (e.preventDefault) e.preventDefault(); 
				self.scale = e.velocityExpansion;
				self.setup.scale && self.setup.scale(e);
			}
			return false;
		}, false);
	}
	if (window.addEventListener) this.elem.addEventListener('DOMMouseScroll', function(e) { 
		if (e.preventDefault) e.preventDefault(); 
		self.wheelDelta = e.detail * 10;
		self.setup.wheel && self.setup.wheel(e);
		return false; 
	}, false); 
	this.elem.onmousewheel = function () { 
		self.wheelDelta = -event.wheelDelta * .25;
		self.setup.wheel && self.setup.wheel(event);
		return false; 
	}
}

// ===== request animation frame =====
window.requestAnimFrame = (function(){
		return  window.requestAnimationFrame || 
		window.webkitRequestAnimationFrame   || 
		window.mozRequestAnimationFrame      || 
		window.oRequestAnimationFrame        || 
		window.msRequestAnimationFrame       || 
		function( run ){
			window.setTimeout(run, 16);
		};
})();


// ===== ge1doot global =====    js文件1
var ge1doot = ge1doot || {
	json: null,
	screen: null,
	pointer: null,
	camera: null,
	loadJS: function (url, callback, data) {
		if (typeof url == "string") url = [url];
		var load = function (src) {
			var script = document.createElement("script");
				if (callback) {
					if (script.readyState){
						script.onreadystatechange = function () {
							if (script.readyState == "loaded" || script.readyState == "complete"){
								script.onreadystatechange = null;
								if (--n === 0) callback(data || false);
							}
						}
					} else {
						script.onload = function() {
							if (--n === 0) callback(data || false);
						}
					}
				}
				script.src = src;
				document.getElementsByTagName("head")[0].appendChild(script);
		}
		for (var i = 0, n = url.length; i < n; i++) load(url[i]);
	}
}

// ===== html/canvas container =====
ge1doot.Screen = function (setup) {
	ge1doot.screen = this;
	this.elem = document.getElementById(setup.container) || setup.container;
	this.ctx = this.elem.tagName == "CANVAS" ? this.elem.getContext("2d") : false;
	this.style = this.elem.style;
	this.left = 0;
	this.top = 0;
	this.width = 0;
	this.height = 0;
	this.cursor = "default";
	this.setup = setup;
	this.resize = function () {
		var o = this.elem;
		this.width  = o.offsetWidth;
		this.height = o.offsetHeight;
		for (this.left = 0, this.top = 0; o != null; o = o.offsetParent) {
			this.left += o.offsetLeft;
			this.top  += o.offsetTop;
		}
		if (this.ctx) {
			this.elem.width  = this.width;
			this.elem.height = this.height;
		}
		this.setup.resize && this.setup.resize();
	}
	this.setCursor = function (type) {
		if (type !== this.cursor && 'ontouchstart' in window === false) {
			this.cursor = type;
			this.style.cursor = type;
		}
	}
	window.addEventListener('resize', function () {
		ge1doot.screen.resize();
	}, false);
	!this.setup.resize && this.resize();
}

// ==== unified touch events handler ====
ge1doot.Pointer = function (setup) {
	ge1doot.pointer = this;
	var self        = this;
	var body        = document.body;
	var html        = document.documentElement;
	this.setup      = setup;
	this.screen     = ge1doot.screen;
	this.elem       = this.screen.elem;
	this.X          = 0;
	this.Y          = 0;
	this.Xi         = 0;
	this.Yi         = 0;
	this.bXi        = 0;
	this.bYi        = 0;
	this.Xr         = 0;
	this.Yr         = 0;
	this.startX     = 0;
	this.startY     = 0;
	this.scale      = 0;
	this.wheelDelta = 0;
	this.isDraging  = false;
	this.hasMoved   = false;
	this.isDown     = false;
	this.evt        = false;
	var sX          = 0;
	var sY          = 0;
	// prevent default behavior
	if (setup.tap) this.elem.onclick = function () { return false; }
	if (!setup.documentMove) {
		document.ontouchmove = function(e) { e.preventDefault(); }
	}
	document.addEventListener("MSHoldVisual", function(e) { e.preventDefault(); }, false);
	if (typeof this.elem.style.msTouchAction != 'undefined') this.elem.style.msTouchAction = "none";

	this.pointerDown = function (e) {
		if (!this.isDown) {
			if (this.elem.setCapture) this.elem.setCapture();
			this.isDraging = false;
			this.hasMoved = false;
			this.isDown = true;
			this.evt = e;
			this.Xr = (e.clientX !== undefined ? e.clientX : e.touches[0].clientX);
			this.Yr = (e.clientY !== undefined ? e.clientY : e.touches[0].clientY);
			this.X  = sX = this.Xr - this.screen.left;
			this.Y  = sY = this.Yr - this.screen.top + ((html && html.scrollTop) || body.scrollTop);
			this.setup.down && this.setup.down(e);
		}
	}
	this.pointerMove = function(e) {
		this.Xr = (e.clientX !== undefined ? e.clientX : e.touches[0].clientX);
		this.Yr = (e.clientY !== undefined ? e.clientY : e.touches[0].clientY);
		this.X  = this.Xr - this.screen.left;
		this.Y  = this.Yr - this.screen.top + ((html && html.scrollTop) || body.scrollTop);
		if (this.isDown) {
			this.Xi = this.bXi + (this.X - sX);
			this.Yi = this.bYi - (this.Y - sY);
		}
		if (Math.abs(this.X - sX) > 11 || Math.abs(this.Y - sY) > 11) {
			this.hasMoved = true;
			if (this.isDown) {
				if (!this.isDraging) {
					this.startX = sX;
					this.startY = sY;
					this.setup.startDrag && this.setup.startDrag(e);
					this.isDraging = true;
				} else {
					this.setup.drag && this.setup.drag(e);
				}
			} else {
				sX = this.X;
				sY = this.Y;
			}
		}
		this.setup.move && this.setup.move(e);
	}
	this.pointerUp = function(e) {
		this.bXi = this.Xi;
		this.bYi = this.Yi;
		if (!this.hasMoved) {
			this.X = sX;
			this.Y = sY;
			this.setup.tap && this.setup.tap(this.evt);
		} else {
			this.setup.up && this.setup.up(this.evt);
		}
		this.isDraging = false;
		this.isDown = false;
		this.hasMoved = false;
		this.setup.up && this.setup.up(this.evt);
		if (this.elem.releaseCapture) this.elem.releaseCapture();
		this.evt = false;
	}
	this.pointerCancel = function(e) {
		if (this.elem.releaseCapture) this.elem.releaseCapture();
		this.isDraging = false;
		this.hasMoved = false;
		this.isDown = false;
		this.bXi = this.Xi;
		this.bYi = this.Yi;
		sX = 0;
		sY = 0;
	}
	if ('ontouchstart' in window) {
		this.elem.ontouchstart      = function (e) { self.pointerDown(e); return false;  }
		this.elem.ontouchmove       = function (e) { self.pointerMove(e); return false;  }
		this.elem.ontouchend        = function (e) { self.pointerUp(e); return false;    }
		this.elem.ontouchcancel     = function (e) { self.pointerCancel(e); return false;}
	}
	document.addEventListener("mousedown", function (e) {
		if (
			e.target === self.elem || 
			(e.target.parentNode && e.target.parentNode === self.elem) || 
			(e.target.parentNode.parentNode && e.target.parentNode.parentNode === self.elem)
		) {
			if (typeof e.stopPropagation != "undefined") {
				e.stopPropagation();
			} else {
				e.cancelBubble = true;
			}
			e.preventDefault();
			self.pointerDown(e); 
		}
	}, false);
	document.addEventListener("mousemove", function (e) { self.pointerMove(e); }, false);
	document.addEventListener("mouseup",   function (e) {
		self.pointerUp(e);
	}, false);
	document.addEventListener('gesturechange', function(e) {
		e.preventDefault();
		if (e.scale > 1) self.scale = 0.1; else if (e.scale < 1) self.scale = -0.1; else self.scale = 0;
		self.setup.scale && self.setup.scale(e);
		return false;
	}, false);
	if (window.navigator.msPointerEnabled) {
		var nContact = 0;
		var myGesture = new MSGesture();
		myGesture.target = this.elem;
		this.elem.addEventListener("MSPointerDown", function(e) {
			if (e.pointerType == e.MSPOINTER_TYPE_TOUCH) {
				myGesture.addPointer(e.pointerId);
				nContact++;
			}
		}, false);
		this.elem.addEventListener("MSPointerOut", function(e) {
			if (e.pointerType == e.MSPOINTER_TYPE_TOUCH) {
				nContact--;
			}
		}, false);
		this.elem.addEventListener("MSGestureHold", function(e) {
			e.preventDefault();
		}, false);
		this.elem.addEventListener("MSGestureChange", function(e) {
			if (nContact > 1) {
				if (e.preventDefault) e.preventDefault(); 
				self.scale = e.velocityExpansion;
				self.setup.scale && self.setup.scale(e);
			}
			return false;
		}, false);
	}
	if (window.addEventListener) this.elem.addEventListener('DOMMouseScroll', function(e) { 
		if (e.preventDefault) e.preventDefault(); 
		self.wheelDelta = e.detail * 10;
		self.setup.wheel && self.setup.wheel(e);
		return false; 
	}, false); 
	this.elem.onmousewheel = function () { 
		self.wheelDelta = -event.wheelDelta * .25;
		self.setup.wheel && self.setup.wheel(event);
		return false; 
	}
}

// ===== request animation frame =====
window.requestAnimFrame = (function(){
		return  window.requestAnimationFrame || 
		window.webkitRequestAnimationFrame   || 
		window.mozRequestAnimationFrame      || 
		window.oRequestAnimationFrame        || 
		window.msRequestAnimationFrame       || 
		function( run ){
			window.setTimeout(run, 16);
		};
})();
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