// JavaScript Document

var m3D = function () { 
	/* ---- private vars ---- */ 
	var diapo = [], 
		imb, 
		scr, 
		bar, 
		selected, 
		urlInfo, 
		imagesPath = "images/", 
		camera = {x:0, y:0, z:-650, s:0, fov: 500}, 
		nw = 0, 
		nh = 0; 
	/* ==== camera tween methods ==== */ 
	camera.setTarget = function (c0, t1, p) { 
		if (Math.abs(t1 - c0) > .1) { 
			camera.s = 1; 
			camera.p = 0; 
			camera.d = t1 - c0; 
			if (p) { 
				camera.d *= 2; 
				camera.p = 9; 
			} 
		} 
	} 
	camera.tween = function (v) { 
		if (camera.s != 0) { 
			camera.p += camera.s; 
			camera[v] += camera.d * camera.p * .01; 
			if (camera.p == 10) camera.s = -1; 
			else if (camera.p == 0) camera.s = 0; 
		} 
		return camera.s; 
	} 
	/* ==== diapo constructor ==== */ 
	var Diapo = function (n, img, x, y, z) { 
		if (img) { 
			this.url = img.url; 
			this.title = img.title; 
			this.color = img.color; 
			this.isLoaded = false; 
			if (document.createElement("canvas").getContext) { 
				/* ---- using canvas in place of images (performance trick) ---- */ 
				this.srcImg = new Image(); 
				this.srcImg.src = imagesPath + img.src; 
				this.img = document.createElement("canvas"); 
				this.canvas = true; 
				scr.appendChild(this.img); 
			} else { 
				/* ---- normal image ---- */ 
				this.img = document.createElement('img'); 
				this.img.src = imagesPath + img.src; 
				scr.appendChild(this.img); 
			} 
			/* ---- on click event ---- */ 
			this.img.onclick = function () { 
				if (camera.s) return; 
				if (this.diapo.isLoaded) { 
					if (this.diapo.urlActive) { 
						/* ---- jump hyperlink ---- */ 
						top.location.href = this.diapo.url; 
					} else { 
						/* ---- target positions ---- */ 
						camera.tz = this.diapo.z - camera.fov; 
						camera.tx = this.diapo.x; 
						camera.ty = this.diapo.y; 
						/* ---- disable previously selected img ---- */ 
						if (selected) { 
							selected.but.className = "button viewed"; 
							selected.img.className = ""; 
							selected.img.style.cursor = "pointer"; 
							selected.urlActive = false; 
							urlInfo.style.visibility = "hidden"; 
						} 
						/* ---- select current img ---- */ 
						this.diapo.but.className = "button selected"; 
						interpolation(false); 
						selected = this.diapo; 
					} 
				} 
			} 
			/* ---- command bar buttons ---- */ 
			this.but = document.createElement('div'); 
			this.but.className = "button"; 
			bar.appendChild(this.but); 
			this.but.diapo = this; 
			this.but.style.left = Math.round((this.but.offsetWidth  * 1.2) * (n % 4)) + 'px'; 
			this.but.style.top  = Math.round((this.but.offsetHeight * 1.2) * Math.floor(n / 4)) + 'px'; 
			this.but.onclick = this.img.onclick; 
			imb = this.img; 
			this.img.diapo = this; 
			this.zi = 25000; 
		} else { 
			/* ---- transparent div ---- */ 
			this.img = document.createElement('div'); 
			this.isLoaded = true; 
			this.img.className = "fog"; 
			scr.appendChild(this.img); 
			this.w = 300; 
			this.h = 300; 
			this.zi = 15000; 
		} 
		/* ---- object variables ---- */ 
		this.x = x; 
		this.y = y; 
		this.z = z; 
		this.css = this.img.style; 
	} 
	/* ==== main 3D animation ==== */ 
	Diapo.prototype.anim = function () { 
		if (this.isLoaded) { 
			/* ---- 3D to 2D projection ---- */ 
			var x = this.x - camera.x; 
			var y = this.y - camera.y; 
			var z = this.z - camera.z; 
			if (z < 20) z += 5000; 
			var p = camera.fov / z; 
			var w = this.w * p; 
			var h = this.h * p; 
			/* ---- HTML rendering ---- */ 
			this.css.left   = Math.round(nw + x * p - w * .5) + 'px'; 
			this.css.top    = Math.round(nh + y * p - h * .5) + 'px'; 
			this.css.width  = Math.round(w) + 'px'; 
			this.css.height = Math.round(h) + 'px'; 
			this.css.zIndex = this.zi - Math.round(z); 
		} else { 
			/* ---- image is loaded? ---- */ 
			this.isLoaded = this.loading(); 
		} 
	} 
	/* ==== onload initialization ==== */ 
	Diapo.prototype.loading = function () { 
		if ((this.canvas && this.srcImg.complete) || this.img.complete) { 
			if (this.canvas) { 
				/* ---- canvas version ---- */ 
				this.w = this.srcImg.width; 
				this.h = this.srcImg.height; 
				this.img.width = this.w; 
				this.img.height = this.h; 
				var context = this.img.getContext("2d"); 
				context.drawImage(this.srcImg, 0, 0, this.w, this.h); 
			} else { 
				/* ---- plain image version ---- */ 
				this.w = this.img.width; 
				this.h = this.img.height; 
			} 
			/* ---- button loaded ---- */ 
			this.but.className += " loaded"; 
			return true; 
		} 
		return false; 
	} 
	//////////////////////////////////////////////////////////////////////////// 
	/* ==== screen dimensions ==== */ 
	var resize = function () { 
		nw = scr.offsetWidth * .5; 
		nh = scr.offsetHeight * .5; 
	} 
	/* ==== disable interpolation during animation ==== */ 
	var interpolation = function (bicubic) { 
		var i = 0, o; 
		while( o = diapo[i++] ) { 
			if (o.but) { 
				o.css.msInterpolationMode = bicubic ? 'bicubic' : 'nearest-neighbor'; // makes IE8 happy 
				o.css.imageRendering = bicubic ? 'optimizeQuality' : 'optimizeSpeed'; // does not really work... 
			} 
		} 
	} 
	/* ==== init script ==== */ 
	var init = function (data) { 
		/* ---- containers ---- */ 
		scr = document.getElementById("screen"); 
		bar = document.getElementById("bar"); 
		urlInfo = document.getElementById("urlInfo"); 
		resize(); 
		/* ---- loading images ---- */ 
		var i = 0, 
		    o, 
			n = data.length; 
		while( o = data[i++] ) { 
			/* ---- images ---- */ 
			var x = 1000 * ((i % 4) - 1.5); 
			var y = Math.round(Math.random() * 4000) - 2000; 
			var z = i * (5000 / n); 
			diapo.push( new Diapo(i - 1, o, x, y, z)); 
			/* ---- transparent frames ---- */ 
			var k = diapo.length - 1; 
			for (var j = 0; j < 3; j++) { 
				var x = Math.round(Math.random() * 4000) - 2000; 
				var y = Math.round(Math.random() * 4000) - 2000; 
				diapo.push( new Diapo(k, null, x, y, z + 100)); 
			} 
		} 
		/* ---- start engine ---- */ 
		run(); 
	} 
	//////////////////////////////////////////////////////////////////////////// 
	/* ==== main loop ==== */ 
	var run = function () { 
		/* ---- x axis move ---- */ 
		if (camera.tx) { 
			if (!camera.s) camera.setTarget(camera.x, camera.tx); 
			var m = camera.tween('x'); 
			if (!m) camera.tx = 0; 
		/* ---- y axis move ---- */ 
		} else if (camera.ty) { 
			if (!camera.s) camera.setTarget(camera.y, camera.ty); 
			var m = camera.tween('y'); 
			if (!m) camera.ty = 0; 
		/* ---- z axis move ---- */ 
		} else if (camera.tz) { 
			if (!camera.s) camera.setTarget(camera.z, camera.tz); 
			var m = camera.tween('z'); 
			if (!m) { 
				/* ---- animation end ---- */ 
				camera.tz = 0; 
				interpolation(true); 
				/* ---- activate hyperlink ---- */ 
				if (selected.url) { 
					selected.img.style.cursor = "pointer"; 
					selected.urlActive = true; 
					selected.img.className = "href"; 
					urlInfo.diapo = selected; 
					urlInfo.onclick = selected.img.onclick; 
					urlInfo.innerHTML = selected.title || selected.url; 
					urlInfo.style.visibility = "visible"; 
					urlInfo.style.color = selected.color || "#fff"; 
					urlInfo.style.top = Math.round(selected.img.offsetTop + selected.img.offsetHeight - urlInfo.offsetHeight - 5) + "px"; 
					urlInfo.style.left = Math.round(selected.img.offsetLeft + selected.img.offsetWidth - urlInfo.offsetWidth - 5) + "px"; 
				} else { 
					selected.img.style.cursor = "default"; 
				} 
			} 
		} 
		/* ---- anim images ---- */ 
		var i = 0, o; 
		while( o = diapo[i++] ) o.anim(); 
		/* ---- loop ---- */ 
		setTimeout(run, 32); 
	} 
	return { 
		//////////////////////////////////////////////////////////////////////////// 
		/* ==== initialize script ==== */ 
		init : init 
	} 
}(); 


///////////////////////////////////////////////////////////////////////////////////////////////////////


setTimeout(function() { 
	m3D.init( 
		[ 
			{ src: 'photo1.jpg', url: 'http://www.texier.fr/collection.php?cat=1&ligne=1&lang=fr', title: 'Gladiator 0235', color: '#000' }, 
			{ src: 'photo2.jpg' }, 
			{ src: 'photo3.jpg' },
			{ src: 'photo4.jpg' },
			{ src: 'photo5.jpg' },
			{ src: 'photo6.jpg' },
			{ src: 'photo7.jpg' },
			{ src: 'photo10.jpg', url: 'http://www.texier.fr/collection.php?cat=1&ligne=1&lang=fr', title: 'Gladiator 0235', color: '#000' }, 
			{ src: 'photo11.jpg' }, 
			{ src: 'photo12.jpg' },
			{ src: 'photo13.jpg' },
			{ src: 'photo14.jpg' },
			{ src: 'photo15.jpg' },
			{ src: 'photo7.jpg' },
			{ src: 'photo10.jpg', url: 'http://www.texier.fr/collection.php?cat=1&ligne=1&lang=fr', title: 'Gladiator 0235', color: '#000' }, 
			{ src: 'photo8.jpg' }, 
			{ src: 'photo3.jpg' },
			{ src: 'photo4.jpg' },
			{ src: 'photo5.jpg' },
			{ src: 'photo6.jpg' },
			{ src: 'photo7.jpg' },
			{ src: 'photo1.jpg', url: 'http://www.texier.fr/collection.php?cat=1&ligne=1&lang=fr', title: 'Gladiator 0235', color: '#000' }, 
			{ src: 'photo8.jpg' }, 
			{ src: 'photo9.jpg' }
		] 
	); 
}, 500);