/**
 * Copyright (C) 2010-2011 Graham Breach
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

 /**
 * TagCanvas 1.11
 * For more information, please contact <graham@goat1000.com>
 */

( function() {
	var i, j, abs = Math.abs, sin = Math.sin, cos = Math.cos, hexlookup3 = {}, hexlookup2 = {}, hexlookup1 = {
		0:"0,",   1:"17,",  2:"34,",  3:"51,",  4:"68,",  5:"85,",
		6:"102,", 7:"119,", 8:"136,", 9:"153,", a:"170,", A:"170,",
		b:"187,", B:"187,", c:"204,", C:"204,", d:"221,", D:"221,",
		e:"238,", E:"238,", f:"255,", F:"255,"	
	}, Oproto, Tproto, TCproto, doc = document;
	
	for( i = 0; i < 256; ++i ) {
		j = i.toString( 16 );
		if( i < 16 ) {
			j = '0' + j;
		}
		hexlookup2[j] = hexlookup2[j.toUpperCase()] = i.toString() + ',';
	}
	
	function Defined(d) {
		return typeof(d) != 'undefined';
	}
	
	/* HIER */
	function PointsOnSphere(n) {
		var i, y, r, phi, pts = [], inc = Math.PI * (3-Math.sqrt(5)), off = 2/n;
		for(i = 0; i < n; ++i) {
			y = i * off - 1 + (off / 2);
			r = Math.sqrt(1 - y*y);
			phi = i * inc;
			pts.push([cos(phi)*r, y, sin(phi)*r]);
		}
		return pts;
	}
	function Cylinder(n,o,i,j,k,l) {
		var phi, pts = [], inc = Math.PI * (3-Math.sqrt(5)), off = 2/n;
		for(i = 0; i < n; ++i) {
			j = i * off - 1 + (off / 2);
			phi = i * inc;
			k = cos(phi);
			l = sin(phi);
			pts.push(o ? [j, k, l] : [k, j, l]);
		}
		return pts;
	}
	function PointsOnCylinderV(n) { return Cylinder(n) }
	function PointsOnCylinderH(n) { return Cylinder(n,1) }
	/* /hier */

	
	function SetAlpha(c,a) {
		var d = c, p1, p2, ae = (a*1).toPrecision(3) + ')';
		if(c[0] === '#') {
			if(!hexlookup3[c])
				if(c.length === 4)
					hexlookup3[c] = 'rgba(' + hexlookup1[c[1]] + hexlookup1[c[2]] + hexlookup1[c[3]];
				else
					hexlookup3[c] = 'rgba(' + hexlookup2[c.substr(1,2)] + hexlookup2[c.substr(3,2)] + hexlookup2[c.substr(5,2)];
			d = hexlookup3[c] + ae;
		} else if(c.substr(0,4) === 'rgb(' || c.substr(0,4) === 'hsl(') {
			d = (c.replace('(','a(').replace(')', ',' + ae));
		} else if(c.substr(0,5) === 'rgba(' || c.substr(0,5) === 'hsla(') {
			p1 = c.lastIndexOf(',') + 1, p2 = c.indexOf(')');
			a *= parseFloat(c.substring(p1,p2));
			d = c.substr(0,p1) + a.toPrecision(3) + ')';
		}
		return d;
	}
	function NewCanvas(w,h) {
		// if using excanvas, give up now
		if(window.G_vmlCanvasManager)
			return null;
		var c = doc.createElement('canvas');
		c.width = w;
		c.height = h;
		return c;
	}
	// I think all browsers pass this test now...
	function ShadowAlphaBroken() {
		var cv = NewCanvas(3,3), c, i;
		if(!cv)
			return false;
		c = cv.getContext('2d');
		c.strokeStyle = '#000';
		c.shadowColor = '#fff';
		c.shadowBlur = 3;
		c.globalAlpha = 0;
		c.strokeRect(2,2,2,2);
		c.globalAlpha = 1;
		i = c.getImageData(2,2,1,1);
		cv = null;
		return (i.data[0] > 0);
	}
	function FindGradientColour(t,p) {
		var l = 1024, g = t.weightGradient, cv, c, i, gd, d;
		if(t.gCanvas) {
			c = t.gCanvas.getContext('2d');
		} else {
			t.gCanvas = cv = NewCanvas(l,1);
			if(!cv)
				return null;
			c = cv.getContext('2d');
			gd = c.createLinearGradient(0,0,l,0);
			for(i in g)
				gd.addColorStop(1-i, g[i]);
			c.fillStyle = gd;
			c.fillRect(0,0,l,1);
		}
		d = c.getImageData(~~((l-1)*p),0,1,1).data;
		return 'rgba(' + d[0] + ',' + d[1] + ',' + d[2] + ',' + (d[3]/255) + ')';
	}
	function TextSet(c,f,l,s,sc,sb,so) {
		var xo = (sb || 0) + (so && so[0] < 0 ? abs(so[0]) : 0),
			yo = (sb || 0) + (so && so[1] < 0 ? abs(so[1]) : 0);
		c.font = f;
		c.textBaseline = 'top';
		c.fillStyle = l;
		sc && (c.shadowColor = sc);
		sb && (c.shadowBlur = sb);
		so && (c.shadowOffsetX = so[0], c.shadowOffsetY = so[1]);
		c.fillText(s, xo, yo);
	}
	function TextToCanvas(s,f,ht,w,h,l,sc,sb,so) {
		var cw = w + abs(so[0]) + sb + sb, ch = h + abs(so[1]) + sb + sb, cv, c;
		cv = NewCanvas(cw,ch);
		if(!cv)
			return null;
		c = cv.getContext('2d');
		TextSet(c,f,l,s,sc,sb,so);
		return cv;
	}
	function AddShadowToImage(i,sc,sb,so) {
		var cw = i.width + abs(so[0]) + sb + sb, ch = i.height + abs(so[1]) + sb + sb, cv, c,
			xo = (sb || 0) + (so && so[0] < 0 ? abs(so[0]) : 0),
			yo = (sb || 0) + (so && so[1] < 0 ? abs(so[1]) : 0);
		cv = NewCanvas(cw,ch);
		if(!cv)
			return null;
		c = cv.getContext('2d');
		sc && (c.shadowColor = sc);
		sb && (c.shadowBlur = sb);
		so && (c.shadowOffsetX = so[0], c.shadowOffsetY = so[1]);
		c.drawImage(i, xo, yo);
		return cv;
	}
	
	/* HIER?? */
	function FindTextBoundingBox(s,f,ht) {
		var w = parseInt(s.length * ht), h = parseInt(ht * 2), cv = NewCanvas(w,h), c, idata, w1, h1, x, y, i, ex;
		if(!cv)
			return null;
		c = cv.getContext('2d');
		c.fillStyle = '#000';
		c.fillRect(0,0,w,h);
		TextSet(c,ht + 'px ' + f,'#fff',s)

		idata = c.getImageData(0,0,w,h);
		w1 = idata.width; h1 = idata.height;
		ex = {
			min: { x: w1, y: h1 },
			max: { x: -1, y: -1 }
		};
		for(y = 0; y < h1; ++y) {
			for(x = 0; x < w1; ++x) {
				i = (y * w1 + x) * 4;
				if(idata.data[i+1] > 0) {
					if(x < ex.min.x) ex.min.x = x;
					if(x > ex.max.x) ex.max.x = x;
					if(y < ex.min.y) ex.min.y = y;
					if(y > ex.max.y) ex.max.y = y;
				}
			}
		}
		// device pixels might not be css pixels
		if(w1 != w) {
			ex.min.x *= (w / w1);
			ex.max.x *= (w / w1);
		}
		if(h1 != h) {
			ex.min.y *= (w / h1);
			ex.max.y *= (w / h1);
		}

		cv = null;
		return ex;
	}
	function FixFont(f) {
		return "'" + f.replace(/(\'|\")/g,'').replace(/\s*,\s*/g, "', '") + "'";
	}
	function AddHandler(h,f,e) {
		e = e || doc;
		if(e.addEventListener)
			e.addEventListener(h,f,false);
		else
			e.attachEvent('on' + h, f);
	}
	function AddImage(i,t,tl) {
		if(i.complete) {
			t.w = i.width;
			t.h = i.height;
			tl.push(t);
		} else {
			AddHandler('load',function() {
				t.w = this.width;
				t.h = this.height;
				tl.push(t);
			},i);
		}
	}
	function FindWeight(t,a) {
		var w = 1, p;
		if(t.weightFrom) {
			w = 1 * (a.getAttribute(t.weightFrom) || t.textHeight);
		} else if(doc.defaultView && doc.defaultView.getComputedStyle) {
			p = doc.defaultView.getComputedStyle(a,null).getPropertyValue('font-size');
			w = p.replace('px','') * 1;
		} else {
			t.weight = false;
		}
		return w;
	}
	function MouseMove(e) {
		var i, tc, dd = doc.documentElement, p;
		for(i in TagCanvas.tc) {
			tc = TagCanvas.tc[i];
			p = AbsPos(i);
			if(e.pageX) {
				tc.mx = e.pageX - p.x;
				tc.my = e.pageY - p.y;
			} else {
				tc.mx = e.clientX + (dd.scrollLeft || doc.body.scrollLeft) - p.x;
				tc.my = e.clientY + (dd.scrollTop || doc.body.scrollTop) - p.y;
			}
		}
	}
	function MouseClick(e) {
		var t = TagCanvas, cb = doc.addEventListener ? 0 : 1,
			tg = e.target && Defined(e.target.id) ? e.target.id : e.srcElement.parentNode.id;
		if(tg && e.button == cb && t.tc[tg]) {
			MouseMove(e);
			t.tc[tg].Clicked(e);
		}
	}
	function MouseWheel(e) {
		var t = TagCanvas,
			tg = e.target && Defined(e.target.id) ? e.target.id : e.srcElement.parentNode.id;
		if(tg && t.tc[tg]) {
			e.cancelBubble = true;
			e.returnValue = false;
			e.preventDefault && e.preventDefault();
			t.tc[tg].Wheel((e.wheelDelta || e.detail) > 0);
		}
	}
	
	
	function DrawCanvas() {
		var t = TagCanvas.tc, i;
		for(i in t)
			t[i].Draw();
	}
	function AbsPos(id) {
		var e, p, pn;
		e = doc.getElementById(id);
		p = {x:e.offsetLeft,y:e.offsetTop};
		while(e.offsetParent) {
			pn = e.offsetParent;
			p.x += pn.offsetLeft;
			p.y += pn.offsetTop;
			e = pn;
		}
		return p;
	}
	function RotX(p1,t) {
		var s = sin(t), c = cos(t); 
		return {x:p1.x, y:(p1.y * c) + (p1.z * s), z:(p1.y * -s) + (p1.z * c)};
	}
	function RotY(p1,t) {
		var s = sin(t), c = cos(t); 
		return {x:(p1.x * c) + (p1.z * -s), y:p1.y, z:(p1.x * s) + (p1.z * c)};
	}
	function Project(tc,p1,w,h,fov,asp) {
		var yn, xn, zn, m = tc.z1 / (tc.z1 + tc.z2 + p1.z);
		yn = p1.y * m;
		xn = p1.x * m;
		zn = tc.z2 + p1.z;
		return {x:xn, y:yn, z:zn};
	}
	
	/**
	 * @constructor
	 */
	function Outline(tc) {
		this.ts = new Date().valueOf();
		this.tc = tc;
		this.x = this.y = this.w = this.h = this.sc = 1;
		this.z = 0;
	}
	
	Oproto = Outline.prototype;
	Oproto.Update = function(x,y,w,h,sc,p) {
		var o = this.tc.outlineOffset;
		this.x = sc * (x - o);
		this.y = sc * (y - o);
		this.w = sc * (w + o * 2);
		this.h = sc * (h + o * 2);
		this.sc = sc; // used to determine frontmost
		this.z = p.z;
	};
	Oproto.Draw = function(c) {
		var diff = new Date().valueOf() - this.ts, t = this.tc;
		c.setTransform(1,0,0,1,0,0);
		c.strokeStyle = t.outlineColour;
		c.lineWidth = t.outlineThickness;
		c.shadowBlur = c.shadowOffsetX = c.shadowOffsetY = 0;
		if(t.pulsateTo < 1)
			c.globalAlpha = t.pulsateTo + ((1 - t.pulsateTo) * 
				(0.5 + (cos(2 * Math.PI * diff / (1000 * t.pulsateTime)) / 2)));
		else
			c.globalAlpha = 1;
		c.strokeRect(this.x, this.y, this.w, this.h);
	};
	Oproto.Active = function(c,x,y) {
		return (x >= this.x && y >= this.y &&
			x <= this.x + this.w && y <= this.y + this.h);
	};
	
	/**
	 * @constructor
	 */
	function Tag(tc,name,a,v,w,h) {
		var c = tc.ctxt, i;
		this.tc = tc;
		this.image = name.src ? name : null;
		this.name = name.src ? '' : name;
		this.a = a;
		this.p3d = { x: v[0] * tc.radius * 1.1, y: v[1] * tc.radius * 1.1, z: v[2] * tc.radius * 1.1};
		this.x = this.y = 0;
		this.w = w;
		this.h = h;
		this.colour = tc.textColour;
		this.weight = this.sc = this.alpha = 1;
		this.weighted = !tc.weight;
		this.outline = new Outline(tc);
		if(this.image) {
			if(tc.txtOpt && tc.shadow) {
				i = AddShadowToImage(this.image,tc.shadow,tc.shadowBlur,tc.shadowOffset);
				if(i) {
					this.image = i;
					this.w = i.width;
					this.h = i.height;
				}
			}
		} else {
			this.textHeight = tc.textHeight;
			this.extents = FindTextBoundingBox(this.name, tc.textFont, this.textHeight);
			this.Measure(c,tc);
		}
		this.SetShadowColour = tc.shadowAlpha ? this.SetShadowColourAlpha : this.SetShadowColourFixed;
		this.SetDraw(tc);
	}
	Tproto = Tag.prototype;
	Tproto.SetDraw = function(t) {
		this.Draw = this.image ? (t.ie > 7 ? this.DrawImageIE : this.DrawImage) : this.DrawText;
	};
	Tproto.Measure = function(c,t) {
		this.h = this.extents ? this.extents.max.y + this.extents.min.y : this.textHeight;
		c.font = this.font = this.textHeight + 'px ' + t.textFont;
		this.w1 = c.measureText(this.name).width;
		if(t.txtOpt) {
			var s = t.txtScale, th = s * this.textHeight, f = th + 'px ' + t.textFont,
				soff = [s*t.shadowOffset[0],s*t.shadowOffset[1]], cw;
			c.font = f;
			cw = c.measureText(this.name).width;
			this.image = TextToCanvas(this.name, f, th, cw, s * this.h, this.colour,
				t.shadow, s * t.shadowBlur, soff);
			if(this.image) {
				this.w = this.image.width / s;
				this.h = this.image.height / s;
			}
			this.SetDraw(t);
			t.txtOpt = this.image;
		}
	};
	Tproto.SetWeight = function(w) {
		this.weight = w;
		this.Weight(this.tc.ctxt, this.tc);
		this.Measure(this.tc.ctxt, this.tc);
	};
	Tproto.Weight = function(c,t) {
		var w = this.weight, m = t.weightMode;
		this.weighted = true;
		if(m == 'colour' || m == 'both')
			this.colour = FindGradientColour(t, (w - t.min_weight) / (t.max_weight-t.min_weight));
		if(m == 'size' || m == 'both')
			this.textHeight = w * t.weightSize;
		this.extents = FindTextBoundingBox(this.name, t.textFont, this.textHeight);
	};
	Tproto.SetShadowColourFixed = function(c,s,a) {
		c.shadowColor = s;
	};
	Tproto.SetShadowColourAlpha = function(c,s,a) {
		c.shadowColor = SetAlpha(s, a);
	};
	Tproto.DrawText = function(c,xoff,yoff) {
		var t = this.tc, x = this.x, y = this.y, w, h, s = this.sc, o = this.outline;
		/* hier
		alert( "t=" + t + " x=" + x + " y=" + y + " w=" + w + " h=" + h + " s=" + s + " o=" + o );
		*/
		c.globalAlpha = this.alpha;
		c.setTransform(s,0,0,s,0,0);
		c.fillStyle = this.colour;
		t.shadow && this.SetShadowColour(c,t.shadow,this.alpha);
		c.font = this.font;
		w = this.w1 * s;
		h = this.h * s;
		x += 1 + (xoff / s) - (w / 2);
		y += 1 + (yoff / s) - (h / 2);

		c.fillText(this.name, x, y);
		o.Update(x, y, this.w1, this.h, s, this.p3d);
		return o.Active(c, t.mx, t.my) ? o : null;
	};
	Tproto.DrawImage = function(c,xoff,yoff) {
		var t = this.tc, x = this.x, y = this.y, s = this.sc, o = this.outline,
			i = this.image, w = this.w, h = this.h;
		/* hier
			alert( "t=" + t + " x=" + x + " y=" + y + " w=" + w + " h=" + h + " s=" + s + " o=" + o );
		*/
		c.globalAlpha = this.alpha;
		c.setTransform(s,0,0,s,0,0);
		c.fillStyle = this.colour;
		t.shadow && this.SetShadowColour(c,t.shadow,this.alpha);
		x += (xoff / s) - (w / 2);
		y += (yoff / s) - (h / 2);

		c.drawImage(i, x, y, w, h);
		o.Update(x, y, w, h, s, this.p3d);
		return o.Active(c, t.mx, t.my) ? o : null;
	};
	Tproto.DrawImageIE = function(c,xoff,yoff) {
		var t = this.tc, i = this.image, s = this.sc, o = this.outline,
			w = i.width = this.w*s, h = i.height = this.h * s,
			x = (this.x*s) + xoff - (w/2), y = (this.y*s) + yoff - (h/2);
		c.globalAlpha = this.alpha;
		c.drawImage(i, x, y);
		o.Update(x, y, w, h, 1, this.p3d);
		return o.Active(c, t.mx, t.my) ? o : null;
	};
	Tproto.Calc = function(yaw,pitch) {
		var pp = RotY(this.p3d,yaw), t = this.tc, mb = t.minBrightness, r = t.radius;
		this.p3d = RotX(pp,pitch);
		pp = Project(t, this.p3d, this.w, this.h, Math.PI / 4, 20);
		this.x = pp.x;
		this.y = pp.y;
		this.sc = (t.z1 + t.z2 - pp.z) / t.z2;
		this.alpha = Math.max(mb,Math.min(1,mb + 1 - ((pp.z - t.z2 + r) / (2 * r))));
	};
	Tproto.Clicked = function(e) {
		var a = this.a, t = a.target, h = a.href, evt;
		if(t != '' && t != '_self') {
			if(self.frames[t])
				self.frames[t] = h;
			else if(top.frames[t])
				top.frames[t] = h;
			else
				window.open(h, t);
			return;
		}
		if(a.fireEvent) {
			if(!a.fireEvent('onclick'))
				return;
		} else {
			evt = doc.createEvent('MouseEvents');
			evt.initMouseEvent('click', 1, 1, window, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, null);
			if(!a.dispatchEvent(evt))
				return;
		}
		doc.location = h;
	};
	/**
	 * @constructor
	 */
	function TagCanvas(cid,lctr,opt) {
		var i, ctr, tl, vl, p, im, ii, tag, c = doc.getElementById(cid), 
			cp = ['id','class','innerHTML'], w, weights = [],
			pfuncs = {
				sphere:PointsOnSphere,
				vcylinder:PointsOnCylinderV,
				hcylinder:PointsOnCylinderH
			};

		if(!c) throw 0;
		if(Defined(window.G_vmlCanvasManager)) {
			c = window.G_vmlCanvasManager.initElement(c);
			this.ie = parseFloat(navigator.appVersion.split('MSIE')[1]);
		}
		if(c && (!c.getContext || !c.getContext('2d').fillText)) {
			p = doc.createElement('DIV');
			for(i = 0; i < cp.length; ++i)
				p[cp[i]] = c[cp[i]];
			c.parentNode.insertBefore(p,c);
			c.parentNode.removeChild(c);
			throw 0;
		}
		for(i in TagCanvas.options)
			this[i] = opt && Defined(opt[i]) ? opt[i] : 
				(Defined(TagCanvas[i]) ? TagCanvas[i] : TagCanvas.options[i]);

		this.canvas = c;
		this.ctxt = c.getContext('2d');
		this.z1 = (19800 / (Math.exp(this.depth) * (1-1/Math.E))) +
			20000 - 19800 / (1-(1/Math.E));
		this.z2 = this.z1 * (1/this.zoom);
		this.radius = (c.height > c.width ? c.width : c.height)
					* 0.33 * (this.z2 + this.z1) / (this.z1);
		this.max_weight = 0;
		this.min_weight = 200;
		this.textFont = FixFont(this.textFont);
		this.ctxt.textBaseline = 'top';
		if(this.shadowBlur || this.shadowOffset[0] || this.shadowOffset[1]) {
			// let the browser translate "red" into "#ff0000"
			this.ctxt.shadowColor = this.shadow;
			this.shadow = this.ctxt.shadowColor;
			this.shadowAlpha = ShadowAlphaBroken();
		} else {
			delete this.shadow;
		}
		try {
			ctr = doc.getElementById(lctr || cid);
			tl = ctr.getElementsByTagName('a');
			this.taglist = [];

			if(tl.length) {
				this.shape = pfuncs[this.shape] || pfuncs.sphere;
				vl = this.shape(tl.length);
				for(i = 0; i < tl.length; ++i) {
					im = tl[i].getElementsByTagName('img');
					if(im.length) {
						ii = new Image;
						ii.src = im[0].src;
						tag = new Tag(this, ii, tl[i], vl[i], 1, 1);
						AddImage(ii,tag,this.taglist);
					} else {
						this.taglist.push(new Tag(this, tl[i].innerText || tl[i].textContent, tl[i],
							vl[i], 2, this.textHeight + 2));
					}
					if(this.weight) {
						w = FindWeight(this,tl[i]);
						if(w > this.max_weight) this.max_weight = w;
						if(w < this.min_weight) this.min_weight = w;
						weights.push(w);
					}
				}
				if(this.weight = (this.max_weight > this.min_weight)) {
					for(i = 0; i < this.taglist.length; ++i) {
						this.taglist[i].SetWeight(weights[i]);
					}
				}
			}
			if(lctr && this.hideTags)
				ctr.style.display = 'none';
		} catch(ex) {
			ex;
		}

		this.yaw = this.initial ? this.initial[0] * this.maxSpeed : 0;
		this.pitch = this.initial ? this.initial[1] * this.maxSpeed : 0;
		AddHandler('mousemove', MouseMove, c);
		AddHandler('mouseout', MouseMove, c);
		AddHandler('mouseup', MouseClick, c);
		if(this.wheelZoom) {
			AddHandler('mousewheel', MouseWheel, c);
			AddHandler('DOMMouseScroll', MouseWheel, c);
		}
		TagCanvas.started || (TagCanvas.started = setInterval(DrawCanvas, this.interval));
	}
	TCproto = TagCanvas.prototype;
	TCproto.Draw = function() {
		var cv = this.canvas, cw = cv.width, ch = cv.height, max_sc = 0, yaw = this.yaw, pitch = this.pitch,
			x1 = cw / 2, y1 = ch / 2, c = this.ctxt, active, a, i, tl = this.taglist, l = tl.length;
		// HIER alert( "cw=" + cw + " ch=" + ch );
		// cw=960 ch=130
		c.setTransform(1,0,0,1,0,0);
		this.active = null;
		for(i = 0; i < l; ++i)
			tl[i].Calc(yaw, pitch);
		tl = tl.sort(function(a,b) {return a.sc-b.sc});

		if(!this.txtOpt && this.shadow) {
			c.shadowBlur = this.shadowBlur;
			c.shadowOffsetX = this.shadowOffset[0];
			c.shadowOffsetY = this.shadowOffset[1];
		}
		c.clearRect(0,0,cw,ch);
		for(i = 0; i < l; ++i) {
			a = tl[i].Draw(c, x1, y1);
			if(a && a.sc > max_sc && (!this.frontSelect || a.z <= 0)) {
				active = a;
				active.index = i;
				max_sc = a.sc;
			}
		}
		if(this.freezeActive && active)
			this.yaw = this.pitch = 0;
		else
			this.Animate(cw, ch);
		active && (this.active = active).Draw(c);
	};
	TCproto.Animate = function(w,h) {
		var tc = this, x = tc.mx, y = tc.my, l = tc.lock, s, ay, ap, r;
		if(x >= 0 && y >= 0 && x < w && y < h)
		{
			s = tc.maxSpeed, r = tc.reverse ? -1 : 1;
			if(l != 'x')
				this.yaw = r * ((s * 2 * x / w) - s);
			if(l != 'y')
				this.pitch = r * -((s * 2 * y / h) - s);
			this.initial = null;
		}
		else if(!tc.initial)
		{
			s = tc.minSpeed, ay = abs(tc.yaw), ap = abs(tc.pitch);
			if(l != 'x' && ay > s)
				this.yaw = ay > tc.z0 ? tc.yaw * tc.decel : 0;
			if(l != 'y' && ap > s)
				this.pitch = ap > tc.z0 ? tc.pitch * tc.decel : 0;
		}
	};
	TCproto.Zoom = function(r) {
		this.z2 = this.z1 * (1/r);
	};
	TCproto.Clicked = function(e) {
		var t = this.taglist, a = this.active;
		try {
			if(a && t[a.index]) 
				t[a.index].Clicked(e);
		} catch(ex) {
		}
	};
	TCproto.Wheel = function(i) {
		var z = this.zoom + this.zoomStep * (i ? 1 : -1);
		this.zoom = Math.min(this.zoomMax,Math.max(this.zoomMin,z));
		this.Zoom(this.zoom);
	};
	TagCanvas.Start = function(id,l,o) {
		TagCanvas.tc[id] = new TagCanvas(id,l,o);
	};

	TagCanvas.tc = {};
	TagCanvas.options = {
		z1: 20000,
		z2: 20000,
		z0: 0.0002,
		freezeActive: false,
		pulsateTo: 0.15,
		pulsateTime: 3,
		reverse: false,
		depth: 0.5,
		maxSpeed: 0.05,
		minSpeed: 0,
		decel: 0.95,
		interval: 20,
		minBrightness: 0.1,
		outlineColour: '#ffff99',
		outlineThickness: 2,
		outlineOffset: 5,
		textColour: '#ff99ff',
		textHeight: 15,
		textFont: 'Helvetica, Arial, sans-serif',
		shadow: '#000',
		shadowBlur: 0,
		shadowOffset: [0,0],
		initial: null,
		hideTags: true,
		zoom: 1,
		weight: false,
		weightMode: 'size',
		weightFrom: null,
		weightSize: 1,
		weightGradient: {0:'#f00', 0.33:'#ff0', 0.66:'#0f0', 1:'#00f'},
		txtOpt: true,
		txtScale: 2,
		frontSelect: false,
		wheelZoom: true,
		zoomMin: 0.3,
		zoomMax: 3,
		zoomStep: 0.05,
		shape: 'sphere',
		lock: null
	};

	for( i in TagCanvas.options ) {
		TagCanvas[i] = TagCanvas.options[i];
	}
	
	window.TagCanvas = TagCanvas;
	
} ) ();