xrfragment/dist/xrfragment.three.js

/*
 * v0.5.1 generated at Wed Dec  6 10:52:00 PM CET 2023
 * https://xrfragment.org
 * SPDX-License-Identifier: MPL-2.0
 */
var $hx_exports = typeof exports != "undefined" ? exports : typeof window != "undefined" ? window : typeof self != "undefined" ? self : this;
(function ($global) { "use strict";
$hx_exports["xrfragment"] = $hx_exports["xrfragment"] || {};
var EReg = function(r,opt) {
	this.r = new RegExp(r,opt.split("u").join(""));
};
EReg.__name__ = true;
EReg.prototype = {
	match: function(s) {
		if(this.r.global) {
			this.r.lastIndex = 0;
		}
		this.r.m = this.r.exec(s);
		this.r.s = s;
		return this.r.m != null;
	}
	,split: function(s) {
		var d = "#__delim__#";
		return s.replace(this.r,d).split(d);
	}
};
var HxOverrides = function() { };
HxOverrides.__name__ = true;
HxOverrides.cca = function(s,index) {
	var x = s.charCodeAt(index);
	if(x != x) {
		return undefined;
	}
	return x;
};
HxOverrides.substr = function(s,pos,len) {
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			return "";
		}
	}
	return s.substr(pos,len);
};
HxOverrides.now = function() {
	return Date.now();
};
Math.__name__ = true;
var Reflect = function() { };
Reflect.__name__ = true;
Reflect.field = function(o,field) {
	try {
		return o[field];
	} catch( _g ) {
		return null;
	}
};
Reflect.fields = function(o) {
	var a = [];
	if(o != null) {
		var hasOwnProperty = Object.prototype.hasOwnProperty;
		for( var f in o ) {
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			a.push(f);
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		}
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	return a;
};
Reflect.deleteField = function(o,field) {
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		return false;
	}
	delete(o[field]);
	return true;
};
Reflect.copy = function(o) {
	if(o == null) {
		return null;
	}
	var o2 = { };
	var _g = 0;
	var _g1 = Reflect.fields(o);
	while(_g < _g1.length) {
		var f = _g1[_g];
		++_g;
		o2[f] = Reflect.field(o,f);
	}
	return o2;
};
var Std = function() { };
Std.__name__ = true;
Std.string = function(s) {
	return js_Boot.__string_rec(s,"");
};
Std.parseInt = function(x) {
	if(x != null) {
		var _g = 0;
		var _g1 = x.length;
		while(_g < _g1) {
			var i = _g++;
			var c = x.charCodeAt(i);
			if(c <= 8 || c >= 14 && c != 32 && c != 45) {
				var nc = x.charCodeAt(i + 1);
				var v = parseInt(x,nc == 120 || nc == 88 ? 16 : 10);
				if(isNaN(v)) {
					return null;
				} else {
					return v;
				}
			}
		}
	}
	return null;
};
var StringTools = function() { };
StringTools.__name__ = true;
StringTools.isSpace = function(s,pos) {
	var c = HxOverrides.cca(s,pos);
	if(!(c > 8 && c < 14)) {
		return c == 32;
	} else {
		return true;
	}
};
StringTools.ltrim = function(s) {
	var l = s.length;
	var r = 0;
	while(r < l && StringTools.isSpace(s,r)) ++r;
	if(r > 0) {
		return HxOverrides.substr(s,r,l - r);
	} else {
		return s;
	}
};
StringTools.rtrim = function(s) {
	var l = s.length;
	var r = 0;
	while(r < l && StringTools.isSpace(s,l - r - 1)) ++r;
	if(r > 0) {
		return HxOverrides.substr(s,0,l - r);
	} else {
		return s;
	}
};
StringTools.trim = function(s) {
	return StringTools.ltrim(StringTools.rtrim(s));
};
var haxe_iterators_ArrayIterator = function(array) {
	this.current = 0;
	this.array = array;
};
haxe_iterators_ArrayIterator.__name__ = true;
haxe_iterators_ArrayIterator.prototype = {
	hasNext: function() {
		return this.current < this.array.length;
	}
	,next: function() {
		return this.array[this.current++];
	}
};
var js_Boot = function() { };
js_Boot.__name__ = true;
js_Boot.__string_rec = function(o,s) {
	if(o == null) {
		return "null";
	}
	if(s.length >= 5) {
		return "<...>";
	}
	var t = typeof(o);
	if(t == "function" && (o.__name__ || o.__ename__)) {
		t = "object";
	}
	switch(t) {
	case "function":
		return "<function>";
	case "object":
		if(((o) instanceof Array)) {
			var str = "[";
			s += "\t";
			var _g = 0;
			var _g1 = o.length;
			while(_g < _g1) {
				var i = _g++;
				str += (i > 0 ? "," : "") + js_Boot.__string_rec(o[i],s);
			}
			str += "]";
			return str;
		}
		var tostr;
		try {
			tostr = o.toString;
		} catch( _g ) {
			return "???";
		}
		if(tostr != null && tostr != Object.toString && typeof(tostr) == "function") {
			var s2 = o.toString();
			if(s2 != "[object Object]") {
				return s2;
			}
		}
		var str = "{\n";
		s += "\t";
		var hasp = o.hasOwnProperty != null;
		var k = null;
		for( k in o ) {
		if(hasp && !o.hasOwnProperty(k)) {
			continue;
		}
		if(k == "prototype" || k == "__class__" || k == "__super__" || k == "__interfaces__" || k == "__properties__") {
			continue;
		}
		if(str.length != 2) {
			str += ", \n";
		}
		str += s + k + " : " + js_Boot.__string_rec(o[k],s);
		}
		s = s.substring(1);
		str += "\n" + s + "}";
		return str;
	case "string":
		return o;
	default:
		return String(o);
	}
};
var xrfragment_Filter = $hx_exports["xrfragment"]["Filter"] = function(str) {
	this.q = { };
	this.str = "";
	if(str != null) {
		this.parse(str);
	}
};
xrfragment_Filter.__name__ = true;
xrfragment_Filter.prototype = {
	toObject: function() {
		return Reflect.copy(this.q);
	}
	,get: function() {
		return Reflect.copy(this.q);
	}
	,parse: function(str) {
		var token = str.split(" ");
		var q = { };
		var process = function(str,prefix) {
			if(prefix == null) {
				prefix = "";
			}
			str = StringTools.trim(str);
			var k = str.split("=")[0];
			var v = str.split("=")[1];
			var filter = { };
			if(q[prefix + k]) {
				filter = q[prefix + k];
			}
			if(xrfragment_XRF.isProp.match(str)) {
				var oper = "";
				if(str.indexOf(">") != -1) {
					oper = ">";
				}
				if(str.indexOf("<") != -1) {
					oper = "<";
				}
				if(xrfragment_XRF.isExclude.match(k)) {
					k = HxOverrides.substr(k,1,null);
				}
				v = HxOverrides.substr(v,oper.length,null);
				if(oper.length == 0) {
					oper = "=";
				}
				var rule = { };
				if(xrfragment_XRF.isNumber.match(v)) {
					rule[oper] = parseFloat(v);
				} else {
					rule[oper] = v;
				}
				q["expr"] = rule;
			}
			var value = xrfragment_XRF.isDeep.match(str) ? k.split("*").length - 1 : 0;
			q["deep"] = value;
			var value = xrfragment_XRF.isExclude.match(str) ? false : true;
			q["show"] = value;
			var value = k.replace(xrfragment_XRF.operators.r,"");
			q["key"] = value;
			q["value"] = v;
		};
		var _g = 0;
		var _g1 = token.length;
		while(_g < _g1) {
			var i = _g++;
			process(token[i]);
		}
		return this.q = q;
	}
	,test: function(obj) {
		var qualify = false;
		var _g = 0;
		var _g1 = Reflect.fields(obj);
		while(_g < _g1.length) {
			var k = _g1[_g];
			++_g;
			var v = Std.string(Reflect.field(obj,k));
			if(this.testProperty(k,v)) {
				qualify = true;
			}
		}
		var _g = 0;
		var _g1 = Reflect.fields(obj);
		while(_g < _g1.length) {
			var k = _g1[_g];
			++_g;
			var v = Std.string(Reflect.field(obj,k));
			if(this.testProperty(k,v,true)) {
				qualify = false;
			}
		}
		return qualify;
	}
	,testProperty: function(property,value,exclude) {
		var conds = 0;
		var fails = 0;
		var qualify = 0;
		var testprop = function(expr) {
			conds += 1;
			fails += expr ? 0 : 1;
			return expr;
		};
		if(this.q[value] != null) {
			var v = this.q[value];
			if(v[property] != null) {
				return v[property];
			}
		}
		if(Reflect.field(this.q,"expr")) {
			var f = Reflect.field(this.q,"expr");
			if(!Reflect.field(this.q,"show")) {
				if(Reflect.field(f,"!=") != null && testprop((value == null ? "null" : "" + value) == Std.string(Reflect.field(f,"!="))) && exclude) {
					++qualify;
				}
			} else {
				if(Reflect.field(f,"*") != null && testprop(parseFloat(value) != null)) {
					++qualify;
				}
				if(Reflect.field(f,">") != null && testprop(parseFloat(value) >= parseFloat(Reflect.field(f,">")))) {
					++qualify;
				}
				if(Reflect.field(f,"<") != null && testprop(parseFloat(value) <= parseFloat(Reflect.field(f,"<")))) {
					++qualify;
				}
				if(Reflect.field(f,"=") != null && (testprop(value == Reflect.field(f,"=")) || testprop(parseFloat(value) == parseFloat(Reflect.field(f,"="))))) {
					++qualify;
				}
			}
		}
		return qualify > 0;
	}
};
var xrfragment_Parser = $hx_exports["xrfragment"]["Parser"] = function() { };
xrfragment_Parser.__name__ = true;
xrfragment_Parser.parse = function(key,value,store,index) {
	var Frag_h = Object.create(null);
	Frag_h["#"] = xrfragment_XRF.ASSET | xrfragment_XRF.T_PREDEFINED_VIEW | xrfragment_XRF.PV_EXECUTE;
	Frag_h["src"] = xrfragment_XRF.ASSET | xrfragment_XRF.T_URL;
	Frag_h["href"] = xrfragment_XRF.ASSET | xrfragment_XRF.T_URL | xrfragment_XRF.T_PREDEFINED_VIEW;
	Frag_h["tag"] = xrfragment_XRF.ASSET | xrfragment_XRF.T_STRING;
	Frag_h["pos"] = xrfragment_XRF.PV_OVERRIDE | xrfragment_XRF.T_VECTOR3 | xrfragment_XRF.T_STRING | xrfragment_XRF.T_STRING_OBJ | xrfragment_XRF.METADATA | xrfragment_XRF.NAVIGATOR;
	Frag_h["rot"] = xrfragment_XRF.QUERY_OPERATOR | xrfragment_XRF.PV_OVERRIDE | xrfragment_XRF.T_VECTOR3 | xrfragment_XRF.METADATA | xrfragment_XRF.NAVIGATOR;
	Frag_h["t"] = xrfragment_XRF.ASSET | xrfragment_XRF.PV_OVERRIDE | xrfragment_XRF.T_FLOAT | xrfragment_XRF.T_VECTOR2 | xrfragment_XRF.T_STRING | xrfragment_XRF.NAVIGATOR | xrfragment_XRF.METADATA;
	Frag_h["tv"] = xrfragment_XRF.ASSET | xrfragment_XRF.PV_OVERRIDE | xrfragment_XRF.T_FLOAT | xrfragment_XRF.T_VECTOR2 | xrfragment_XRF.T_VECTOR3 | xrfragment_XRF.NAVIGATOR | xrfragment_XRF.METADATA;
	Frag_h["namespace"] = xrfragment_XRF.ASSET | xrfragment_XRF.T_STRING;
	Frag_h["SPDX"] = xrfragment_XRF.ASSET | xrfragment_XRF.T_STRING;
	Frag_h["unit"] = xrfragment_XRF.ASSET | xrfragment_XRF.T_STRING;
	Frag_h["description"] = xrfragment_XRF.ASSET | xrfragment_XRF.T_STRING;
	Frag_h["session"] = xrfragment_XRF.ASSET | xrfragment_XRF.T_URL | xrfragment_XRF.PV_OVERRIDE | xrfragment_XRF.NAVIGATOR | xrfragment_XRF.METADATA | xrfragment_XRF.PROMPT;
	var keyStripped = key.replace(xrfragment_XRF.operators.r,"");
	var isPVDynamic = key.length > 0 && !Object.prototype.hasOwnProperty.call(Frag_h,key);
	var isPVDefault = value.length == 0 && key.length > 0 && key == "#";
	if(isPVDynamic) {
		var v = new xrfragment_XRF(key,xrfragment_XRF.PV_EXECUTE | xrfragment_XRF.NAVIGATOR,index);
		v.validate(value);
		store[keyStripped] = v;
		return true;
	}
	var v = new xrfragment_XRF(key,Frag_h[key],index);
	if(Object.prototype.hasOwnProperty.call(Frag_h,key)) {
		if(!v.validate(value)) {
			console.log("src/xrfragment/Parser.hx:66:","⚠ fragment '" + key + "' has incompatible value (" + value + ")");
			return false;
		}
		store[keyStripped] = v;
		if(xrfragment_Parser.debug) {
			console.log("src/xrfragment/Parser.hx:70:","✔ " + key + ": " + v.string);
		}
	} else {
		if(typeof(value) == "string") {
			v.guessType(v,value);
		}
		v.noXRF = true;
		store[keyStripped] = v;
	}
	return true;
};
var xrfragment_URI = $hx_exports["xrfragment"]["URI"] = function() { };
xrfragment_URI.__name__ = true;
xrfragment_URI.parse = function(url,filter) {
	var store = { };
	if(url == null || url.indexOf("#") == -1) {
		return store;
	}
	var fragment = url.split("#");
	var splitArray = fragment[1].split("&");
	var _g = 0;
	var _g1 = splitArray.length;
	while(_g < _g1) {
		var i = _g++;
		var splitByEqual = splitArray[i].split("=");
		var regexPlus = new EReg("\\+","g");
		var key = splitByEqual[0];
		var value = "";
		if(splitByEqual.length > 1) {
			var s = regexPlus.split(splitByEqual[1]).join(" ");
			value = decodeURIComponent(s.split("+").join(" "));
		}
		var ok = xrfragment_Parser.parse(key,value,store,i);
	}
	if(filter != null && filter != 0) {
		var _g = 0;
		var _g1 = Reflect.fields(store);
		while(_g < _g1.length) {
			var key = _g1[_g];
			++_g;
			var xrf = store[key];
			if(!xrf.is(filter)) {
				Reflect.deleteField(store,key);
			}
		}
	}
	return store;
};
var xrfragment_XRF = $hx_exports["xrfragment"]["XRF"] = function(_fragment,_flags,_index) {
	this.fragment = _fragment;
	this.flags = _flags;
	this.index = _index;
};
xrfragment_XRF.__name__ = true;
xrfragment_XRF.set = function(flag,flags) {
	return flags | flag;
};
xrfragment_XRF.unset = function(flag,flags) {
	return flags & ~flag;
};
xrfragment_XRF.prototype = {
	is: function(flag) {
		var v = this.flags;
		if(!(typeof(v) == "number" && ((v | 0) === v))) {
			this.flags = 0;
		}
		return (this.flags & flag) != 0;
	}
	,validate: function(value) {
		this.guessType(this,value);
		var ok = true;
		if(!this.is(xrfragment_XRF.T_FLOAT) && this.is(xrfragment_XRF.T_VECTOR2) && !(typeof(this.x) == "number" && typeof(this.y) == "number")) {
			ok = false;
		}
		if(!(this.is(xrfragment_XRF.T_VECTOR2) || this.is(xrfragment_XRF.T_STRING)) && this.is(xrfragment_XRF.T_VECTOR3) && !(typeof(this.x) == "number" && typeof(this.y) == "number" && typeof(this.z) == "number")) {
			ok = false;
		}
		return ok;
	}
	,guessType: function(v,str) {
		v.string = str;
		if(typeof(str) != "string") {
			return;
		}
		if(str.length > 0) {
			if(str.split(",").length > 1) {
				var xyzw = str.split(",");
				if(xyzw.length > 0) {
					v.x = parseFloat(xyzw[0]);
				}
				if(xyzw.length > 1) {
					v.y = parseFloat(xyzw[1]);
				}
				if(xyzw.length > 2) {
					v.z = parseFloat(xyzw[2]);
				}
				if(xyzw.length > 3) {
					v.w = parseFloat(xyzw[3]);
				}
			}
			if(xrfragment_XRF.isColor.match(str)) {
				v.color = str;
			}
			if(xrfragment_XRF.isFloat.match(str)) {
				v.x = parseFloat(str);
				v.float = v.x;
			}
			if(xrfragment_XRF.isInt.match(str)) {
				v.int = Std.parseInt(str);
				v.x = v.int;
			}
			v.filter = new xrfragment_Filter(v.fragment + "=" + v.string);
		} else {
			v.filter = new xrfragment_Filter(v.fragment);
		}
	}
};
if(typeof(performance) != "undefined" ? typeof(performance.now) == "function" : false) {
	HxOverrides.now = performance.now.bind(performance);
}
String.__name__ = true;
Array.__name__ = true;
js_Boot.__toStr = ({ }).toString;
xrfragment_Parser.error = "";
xrfragment_Parser.debug = false;
xrfragment_XRF.ASSET = 1;
xrfragment_XRF.PROP_BIND = 2;
xrfragment_XRF.QUERY_OPERATOR = 4;
xrfragment_XRF.PROMPT = 8;
xrfragment_XRF.ROUNDROBIN = 16;
xrfragment_XRF.NAVIGATOR = 32;
xrfragment_XRF.METADATA = 64;
xrfragment_XRF.PV_OVERRIDE = 128;
xrfragment_XRF.PV_EXECUTE = 256;
xrfragment_XRF.T_COLOR = 8192;
xrfragment_XRF.T_INT = 16384;
xrfragment_XRF.T_FLOAT = 32768;
xrfragment_XRF.T_VECTOR2 = 65536;
xrfragment_XRF.T_VECTOR3 = 131072;
xrfragment_XRF.T_URL = 262144;
xrfragment_XRF.T_PREDEFINED_VIEW = 524288;
xrfragment_XRF.T_STRING = 1048576;
xrfragment_XRF.T_STRING_OBJ = 2097152;
xrfragment_XRF.T_STRING_OBJ_PROP = 4194304;
xrfragment_XRF.isColor = new EReg("^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$","");
xrfragment_XRF.isInt = new EReg("^[-0-9]+$","");
xrfragment_XRF.isFloat = new EReg("^[-0-9]+\\.[0-9]+$","");
xrfragment_XRF.isVector = new EReg("([,]+|\\w)","");
xrfragment_XRF.isUrl = new EReg("(://)?\\..*","");
xrfragment_XRF.isUrlOrPretypedView = new EReg("(^#|://)?\\..*","");
xrfragment_XRF.isString = new EReg(".*","");
xrfragment_XRF.operators = new EReg("(^-|[\\*]+)","");
xrfragment_XRF.isProp = new EReg("^.*=[><=]?","");
xrfragment_XRF.isExclude = new EReg("^-","");
xrfragment_XRF.isDeep = new EReg("\\*","");
xrfragment_XRF.isNumber = new EReg("^[0-9\\.]+$","");
})({});
var xrfragment = $hx_exports["xrfragment"];
// SPDX-License-Identifier: MPL-2.0        
// Copyright (c) 2023 Leon van Kammen/NLNET 

var xrf = {}

xrf.init = function(opts){
  opts      = opts || {}
  xrf.debug = parseInt( ( document.location.hash.match(/debug=([0-9])/) || [0,'0'] )[1] )
  xrf.Parser.debug = xrf.debug 
  xrf.detectCameraRig(opts)
  for ( let i in opts    ) xrf[i] = opts[i]
  xrf.emit('init',opts)
  return xrf
}

xrf.query = function(){
  // framework implementations can override this function, see src/3rd/js/three/index.sj 
  alert("queries are not implemented (yet) for this particular framework")
}

xrf.detectCameraRig = function(opts){
  if( opts.camera ){ // detect rig (if any)
    let getCam  = ((cam) => () => cam)(opts.camera)
    let offsetY = 0 
    while( opts.camera.parent.type != "Scene" ){
      offsetY += opts.camera.position.y
      opts.camera = opts.camera.parent
      opts.camera.getCam = getCam
      opts.camera.updateProjectionMatrix = () => opts.camera.getCam().updateProjectionMatrix()
    }
    opts.camera.offsetY = offsetY
  }
}

xrf.roundrobin = (frag, store) => {
  if( !frag.args || frag.args.length == 0 ) return 0
  if( !store.rr                 ) store.rr = {}
  let label = frag.fragment
  if( store.rr[label] ) return store.rr[label].next()
  store.rr[label] = frag.args
  store.rr[label].next  = () => {
    store.rr[label].index = (store.rr[label].index + 1) % store.rr[label].length 
    return store.rr[label].index
  }
  return store.rr[label].index = 0
}

xrf.hasTag = (tag,tags) => String(tags).match( new RegExp(`(^| )${tag}( |$)`,`g`) )

// map library functions to xrf
for ( let i in xrfragment ) xrf[i] = xrfragment[i] 
/* 
 * (promise-able) EVENTS (optionally continue after listeners are finished using .then)
 *
 * example:
 *
 *  xrf.addEventListener('foo',(e) => {
 *    // let promise = e.promise()   
 *    console.log("navigating to: "+e.detail.destination.url)
 *    // promise.resolve()
 *    // promise.reject("not going to happen")
 *  })
 *
 *  xrf.emit('foo',123)
 *  xrf.emit('foo',123).then(...).catch(...).finally(...)
 */

xrf.addEventListener = function(eventName, callback, scene) {
  if( !this._listeners ) this._listeners = []
  if (!this._listeners[eventName]) {
      // create a new array for this event name if it doesn't exist yet
      this._listeners[eventName] = [];
  }
  if( scene ) callback.scene = scene
  // add the callback to the listeners array for this event name
  this._listeners[eventName].push(callback);
  return () => {
    this._listeners[eventName] = this._listeners[eventName].filter( (c) => c != callback )
  }
};

xrf.emit = function(eventName, data){
  if( typeof data != 'object' ) throw 'emit() requires passing objects'
  if( xrf.debug && ( eventName != "render" || xrf.debug == eventName ) ){
    let label = String(`xrf.emit('${eventName}')`).padEnd(35," ");
    label +=  data.mesh && data.mesh.name ? '#'+data.mesh.name : ''
    console.groupCollapsed(label)
    console.info(data)
    console.groupEnd(label)
    if( xrf.debug > 1 ) debugger
  }
  // forward to THREEjs eventbus if any
  if( data.scene ) data.scene.dispatchEvent( eventName, data )
  if( data.mesh  ) data.mesh.dispatchEvent( eventName, data )
  return xrf.emit.promise(eventName,data)
}

xrf.emit.normal = function(eventName, data) {
    if( !xrf._listeners ) xrf._listeners = []
    var callbacks = xrf._listeners[eventName]
    if (callbacks) {
        for (var i = 0; i < callbacks.length; i++) {
            callbacks[i](data);
        }
    }
};

xrf.emit.promise = function(e, opts){ 
  return new Promise( (resolve, reject) => {
    opts.promise = () => {
      opts.promises = opts.promises || []
      opts.promises.push(0)
      return { 
        resolve: ((index) => () => {
          opts.promises[index] = 1 
          let succesful = opts.promises.reduce( (a,b) => a+b )
          if( succesful == opts.promises.length ) resolve(opts)
        })(opts.promises.length-1),
        reject: console.error
      }
    }
    xrf.emit.normal(e, opts)     
    if( !opts.promises ) resolve(opts)
    delete opts.promise
  })
}

xrf.addEventListener('reset', () => {
// *TODO* do this nicely
//  xrf._listeners['renderPost'] = []
//  xrf._listeners['render'] = []
})
/*! rasterizeHTML.js - v1.3.1 - 2023-07-06
* http://www.github.com/cburgmer/rasterizeHTML.js
* Copyright (c) 2023 Christoph Burgmer; Licensed MIT */

!function(o,i){void 0===o&&void 0!==window&&(o=window),"function"==typeof define&&define.amd?define(["url","xmlserializer","sane-domparser-error","inlineresources"],function(e,t,n,r){return o.rasterizeHTML=i(e,t,n,r)}):"object"==typeof module&&module.exports?module.exports=i(require("url"),require("xmlserializer"),require("sane-domparser-error"),require("inlineresources")):o.rasterizeHTML=i(o.url,o.xmlserializer,o.sanedomparsererror,o.inlineresources)}(this,function(e,t,n,r){var o=function(n){"use strict";var o={},t=[];o.joinUrl=function(e,t){return e?n.resolve(e,t):t},o.getConstantUniqueIdFor=function(e){return t.indexOf(e)<0&&t.push(e),t.indexOf(e)},o.clone=function(e){var t,n={};for(t in e)e.hasOwnProperty(t)&&(n[t]=e[t]);return n};return o.parseOptionalParameters=function(e){var t,n,r={canvas:null,options:{}};return null==e[0]||(t=e[0],"object"==typeof(n=t)&&null!==n&&Object.prototype.toString.apply(t).match(/\[object (Canvas|HTMLCanvasElement)\]/i))?(r.canvas=e[0]||null,r.options=o.clone(e[1])):r.options=o.clone(e[0]),r},o}(e),i=function(i){"use strict";function u(e,t,n){var r=e[t];return e[t]=function(){var e=Array.prototype.slice.call(arguments);return n.apply(this,[e,r])},r}var e={};return e.baseUrlRespectingXhr=function(t,o){return function(){var e=new t;return u(e,"open",function(e,t){var n=e.shift(),r=e.shift(),r=i.joinUrl(o,r);return t.apply(this,[n,r].concat(e))}),e}},e.finishNotifyingXhr=function(t){function e(){var e=new t;return u(e,"send",function(e,t){return r+=1,t.apply(this,arguments)}),e.addEventListener("load",function(){o+=1,n()}),e}var n,r=0,o=0,i=!1,c=new Promise(function(e){n=function(){r-o<=0&&i&&e({totalCount:r})}});return e.waitForRequestsToFinish=function(){return i=!0,n(),c},e},e}(o),e=function(i){"use strict";function r(e){return Array.prototype.slice.call(e)}var e={},c={active:!0,hover:!0,focus:!1,target:!1};return e.fakeUserAction=function(e,t,n){var r=e.querySelector(t),o=":"+n,t="rasterizehtml"+n;r&&(c[n]?i.addClassNameRecursively(r,t):i.addClassName(r,t),i.rewriteCssSelectorWith(e,o,"."+t))},e.persistInputValues=function(e){function t(e){return"checkbox"===e.type||"radio"===e.type}var n=e.querySelectorAll("input"),e=e.querySelectorAll("textarea");r(n).filter(t).forEach(function(e){e.checked?e.setAttribute("checked",""):e.removeAttribute("checked")}),r(n).filter(function(e){return!t(e)}).forEach(function(e){e.setAttribute("value",e.value)}),r(e).forEach(function(e){e.textContent=e.value})},e.rewriteTagNameSelectorsToLowerCase=function(e){i.lowercaseCssTypeSelectors(e,i.findHtmlOnlyNodeNames(e))},e}(function(){"use strict";function c(e){return Array.prototype.slice.call(e)}var n={};n.addClassName=function(e,t){e.className+=" "+t},n.addClassNameRecursively=function(e,t){n.addClassName(e,t),e.parentNode!==e.ownerDocument&&n.addClassNameRecursively(e.parentNode,t)};function r(e,t,o){var i="((?:^|[^.#:\\w])|(?=\\W))("+t.join("|")+")(?=\\W|$)";c(e.querySelectorAll("style")).forEach(function(e){var t,n;void 0===e.sheet&&(t=e,n=document.implementation.createHTMLDocument(""),(r=document.createElement("style")).textContent=t.textContent,n.body.appendChild(r),t.sheet=r.sheet);var r=c(e.sheet.cssRules).filter(function(e){return e.selectorText&&new RegExp(i,"i").test(e.selectorText)});r.length&&(r.forEach(function(e){var t,n=e.selectorText.replace(new RegExp(i,"gi"),function(e,t,n){return t+o(n)});n!==e.selectorText&&(t=n,e=(n=e).cssText.replace(/^[^\{]+/,""),u(n,t+" "+e))}),e.textContent=a(e.sheet.cssRules))})}var u=function(e,t){var n=e.parentStyleSheet,e=c(n.cssRules).indexOf(e);n.insertRule(t,e+1),n.deleteRule(e)},a=function(e){return c(e).reduce(function(e,t){return e+t.cssText},"")};return n.rewriteCssSelectorWith=function(e,t,n){r(e,[t],function(){return n})},n.lowercaseCssTypeSelectors=function(e,t){r(e,t,function(e){return e.toLowerCase()})},n.findHtmlOnlyNodeNames=function(e){for(var t,n=e.ownerDocument.createTreeWalker(e,NodeFilter.SHOW_ELEMENT),r={},o={};t=n.currentNode.tagName.toLowerCase(),"http://www.w3.org/1999/xhtml"===n.currentNode.namespaceURI?r[t]=!0:o[t]=!0,n.nextNode(););retu
// the XRWG (XR WordGraph)is mentioned in the spec 
//
// it collects metadata-keys ('foo' e.g.), names and tags across 3D scene-nodes (.userData.foo e.g.) 

let XRWG = xrf.XRWG = []

XRWG.word = (key) => XRWG.find( (w) => w.word == word )

XRWG.cleankey = (word) => String(word).replace(/[^0-9\.a-zA-Z_]/g,'')
                                      .toLowerCase()
                                      .replace(/.*:\/\//,'')
XRWG.get = (v,k) => XRWG.find( (x) => x[ k || 'word'] == v )

XRWG.match = (str,types,level) => {
  if( XRWG.length == 0 ) XRWG.generate(xrf)
  level = level == undefined ? 1000 : level
  types = types || []
  let res = XRWG.filter( (n) => {
    types.map( (type) => n[type] ? n = false : false )
    return n
  })
  str = str.toLowerCase()
  if( level  <10   ) res = res.filter( (n) => n.key    == str )
  if( level >=10   ) res = res.filter( (n) => n.word   == str   || n.key == str )
  if( level  >30   ) res = res.filter( (n) => n.word.match(str) || n.key == str )
  if( level  >40   ) res = res.filter( (n) => n.word.match(str) || n.key == str || String(n.value||'').match(str) )
  if( level  >999  ) res = res.filter( (n) => n.word.match(str) != null || n.key.match(str) != null || String(n.value||'').match(str) != null)
  return res
}

XRWG.generate = (opts) => {
  let {scene,model} = opts
  XRWG.slice(0,0) // empty  
    
  // collect words from 3d nodes

  let add = (key, spatialNode, type) => {
    if( !key || key.match(/(^#$|name)/) ) return
    let node = XRWG.get( XRWG.cleankey(key) )
    if( node ){
      node.nodes.push(spatialNode)
    }else{
      node = { word: XRWG.cleankey(key), key, nodes:[spatialNode] }
      if( spatialNode.userData[key] ) node.value = spatialNode.userData[key]
      node[type] = true
      xrf.emit('XRWGnode',node)
      XRWG.push( node )
    }
  }

  scene.traverse( (o) => {
    add( `#${o.name}`, o, 'name')
    for( let k in o.userData ){
      if( k == 'tag' ){
        let tagArr = o.userData.tag.split(" ")
                      .map(    (t) => t.trim() )
                      .filter( (t) => t )
                      .map(    (w) => add( w, o, 'tag') )
      }else if( k.match(/^(href|src)$/) ) add( o.userData[k], o, k)
      else if( k[0] == '#' ) add( k, o , 'pv')
      else add( k, o , 'query')
    }
  }) 

  // sort by n
  XRWG.sort( (a,b) => a.nodes.length - b.nodes.length )
  XRWG = XRWG.reverse() // the cleankey/get functions e.g. will persist
  xrf.emit('XRWG',XRWG)
}
// the hashbus (QueryString eventBus) is mentioned in the spec 
//
// it allows metadata-keys ('foo' e.g.) of 3D scene-nodes (.userData.foo e.g.) to 
// react by executing code 

let pub = function( url, model, flags ){  // evaluate fragments in url
  if( !url ) return 
  if( !url.match(/#/) ) url = `#${url}`
  model = model || xrf.model
  let { THREE, camera } = xrf
  let frag = xrf.URI.parse( url, flags )
  let opts = {frag, mesh:xrf.camera, model, camera: xrf.camera, scene: xrf.scene, renderer: xrf.renderer, THREE: xrf.THREE, hashbus: xrf.hashbus }
  xrf.emit('hashbus',opts)
  .then( () => {
    for ( let k in frag ){
      pub.fragment(k,opts) 
    }
  })
  return frag
}

pub.mesh     = (mesh,model) => { // evaluate embedded fragments (metadata) inside mesh of model 
  if( mesh.userData ){
    let frag = {}
    for( let k in mesh.userData ) xrf.Parser.parse( k, mesh.userData[k], frag )
    for( let k in frag ){
      let opts = {frag, mesh, model, camera: xrf.camera, scene: model.scene, renderer: xrf.renderer, THREE: xrf.THREE, hashbus: xrf.hashbus }
      mesh.userData.XRF = frag // allow fragment impl to access XRF obj already
      xrf.emit('frag2mesh',opts)
      .then( () => pub.fragment(k,opts) )
    }
  }
}

pub.fragment = (k, opts ) => { // evaluate one fragment
  let frag = opts.frag[k];

  if( frag.is( xrf.XRF.PV_EXECUTE ) ) pub.XRWG({...opts,frag})

  // call native function (xrf/env.js e.g.), or pass it to user decorator
  xrf.emit(k,opts)
  .then( () => {
    let func = xrf.frag[k] || function(){} 
    if( typeof xrf[k] == 'function' ) xrf[k]( func, frag, opts)
    else func( frag, opts)
  })
}

pub.XRWG = (opts) => {
  let {frag,scene,model,renderer} = opts 

  // if this query was triggered by an src-value, lets filter it
  const isSRC = opts.embedded && opts.embedded.fragment == 'src'
  if( !isSRC ){                             // spec : https://xrfragment.org/#src
    for ( let i in frag  ) {
      let v = frag[i]
      let id = v.string || v.fragment
      if( id == '#' || !id ) return
      let match = xrf.XRWG.match(id)

      if( v.is( xrf.XRF.PV_EXECUTE ) ){
        scene.XRF_PV_ORIGIN = v.string
        // evaluate aliases 
        match.map( (w) => {
          if( w.key == `#${id}` ){
            if(  w.value && w.value[0] == '#' ){
              // if value is alias, execute fragment value 
              xrf.hashbus.pub( w.value, xrf.model, xrf.XRF.METADATA | xrf.XRF.PV_OVERRIDE | xrf.XRF.NAVIGATOR )
            }
          }
        })
        xrf.emit('dynamicKey',{ ...opts,v,frag,id,match,scene })
      }else{
        xrf.emit('dynamicKeyValue',{ ...opts,v,frag,id,match,scene })
      }
    }
  }
}


xrf.hashbus = { pub }
xrf.frag   = {}
xrf.model  = {}
xrf.mixers = []

xrf.init = ((init) => function(opts){
  console.log("add #debug to URL to see XR Fragment debuglog")
  let scene = new opts.THREE.Group()
  opts.scene.add(scene)
  opts.scene = scene
  init(opts)
  if( opts.loaders ) Object.values(opts.loaders).map( xrf.patchLoader )

  xrf.patchRenderer(opts)
  xrf.navigator.init()
  // return xrfragment lib as 'xrf' query functor (like jquery)
  for ( let i in xrf ) xrf.query[i] = xrf[i] 
  return xrf.query
})(xrf.init)

xrf.patchRenderer = function(opts){
  let {renderer,camera} = opts
  renderer.xr.addEventListener( 'sessionstart', () => xrf.baseReferenceSpace = renderer.xr.getReferenceSpace() );
  renderer.xr.enabled = true;
  xrf.clock = new xrf.THREE.Clock()
  renderer.render = ((render) => function(scene,camera){
    // update clock
    let time = xrf.clock.getDelta()
    xrf.emit('render',{scene,camera,time,render}) // allow fragments to do something at renderframe
    render(scene,camera)
    xrf.emit('renderPost',{scene,camera,time,render,renderer}) // allow fragments to do something after renderframe
  })(renderer.render.bind(renderer))

}

xrf.patchLoader = function(loader){
  if( loader.prototype.load.xrf_patched ) return // prevent patching aliased loaders twice
  loader.prototype.load = ((load) => function(url, onLoad, onProgress, onError){
    load.call(  this,
                url,
                (model) => { 
                  onLoad(model); 
                  xrf.parseModel(model,url) 
                },
                onProgress,
                onError)
  })(loader.prototype.load)
  loader.prototype.load.xrf_patched = true
}

xrf.getFile = (url) => url.split("/").pop().replace(/#.*/,'')

xrf.parseModel = function(model,url){
  let file               = xrf.getFile(url)
  model.file             = file
  // eval embedded XR fragments
  model.scene.traverse( (mesh) => {
    xrf.hashbus.pub.mesh(mesh,model) 
  })
  model.animations.map( (a) => console.log("anim: "+a.name) )
  xrf.emit('parseModel',{model,url,file})
}

xrf.getLastModel = ()           => xrf.model.last 

xrf.reset = () => {
  const disposeObject = (obj) => {
    if (obj.children.length > 0) obj.children.forEach((child) => disposeObject(child));
    if (obj.geometry) obj.geometry.dispose();
    if (obj.material) {
      if (obj.material.map) obj.material.map.dispose();
      obj.material.dispose();
    }
    obj.clear()
    obj.removeFromParent() 
    return true
  };
  let nodes = []
  xrf.scene.traverse( (n)     => n.audio && (n.audio.remove()) )
  xrf.scene.traverse( (child) => child.isXRF && (nodes.push(child)) )
  nodes.map( disposeObject ) // leave non-XRF objects intact
  xrf.interactive = xrf.interactiveGroup( xrf.THREE, xrf.renderer, xrf.camera)
  xrf.add( xrf.interactive )
  xrf.layers = 0

  // reset certain events 
  xrf.emit('reset',{})
  // remove mixers
  xrf.mixers.map( (m) => m.stop())
  xrf.mixers = []
}

xrf.parseUrl = (url) => {
  const urlObj = new URL( url.match(/:\/\//) ? url : String(`https://fake.com/${url}`).replace(/\/\//,'/') )
  let   dir  = url.substring(0, url.lastIndexOf('/') + 1)
  const file = urlObj.pathname.substring(urlObj.pathname.lastIndexOf('/') + 1);
  const hash = url.match(/#/) ? url.replace(/.*#/,'') : ''
  const ext  = file.split('.').pop()
  return {urlObj,dir,file,hash,ext}
}

xrf.add = (object) => {
  object.isXRF = true // mark for easy deletion when replacing scene
  xrf.scene.add(object)
}

xrf.hasNoMaterial = (mesh) => {
  const hasTexture        = mesh.material && mesh.material.map 
  const hasMaterialName   = mesh.material && mesh.material.name.length > 0 
  return mesh.geometry && !hasMaterialName && !hasTexture
}
xrf.navigator = {}

xrf.navigator.to = (url,flags,loader,data) => {
  if( !url ) throw 'xrf.navigator.to(..) no url given'

  let hashbus = xrf.hashbus
  xrf.emit('navigate', {url,loader,data})

  return new Promise( (resolve,reject) => {
    let {urlObj,dir,file,hash,ext} = xrf.parseUrl(url)
    if( !file || (!data && xrf.model.file == file) ){ // we're already loaded
      hashbus.pub( url, xrf.model, flags )    // and eval local URI XR fragments 
      xrf.navigator.updateHash(hash)
      return resolve(xrf.model) 
    }

    if( xrf.model && xrf.model.scene ) xrf.model.scene.visible = false
    if( !loader ){  
      const Loader = xrf.loaders[ext]
      if( !Loader ) throw 'xrfragment: no loader passed to xrfragment for extension .'+ext 
      loader = loader || new Loader().setPath( dir )
    }

    // force relative path for files which dont include protocol or relative path
    if( dir ) dir = dir[0] == '.' || dir.match("://") ? dir : `.${dir}`
    url = url.replace(dir,"")
    loader = loader || new Loader().setPath( dir )
    const onLoad = (model) => {
      xrf.reset() // clear xrf objects from scene
      model.file = file
      // only change url when loading *another* file
      if( xrf.model ) xrf.navigator.pushState( `${dir}${file}`, hash )
      xrf.model = model 
      // spec: 1. generate the XRWG
      xrf.XRWG.generate({model,scene:model.scene})
      // spec: 1. execute the default predefined view '#' (if exist) (https://xrfragment.org/#predefined_view)
      xrf.frag.defaultPredefinedViews({model,scene:model.scene})
      // spec: 2. init metadata
      // spec: predefined view(s) from URL (https://xrfragment.org/#predefined_view)
      let frag = hashbus.pub( url, model) // and eval URI XR fragments 
      hashbus.pub.XRWG({model,scene:model.scene,frag})

      xrf.add( model.scene )
      xrf.navigator.updateHash(hash)
      xrf.emit('navigateLoaded',{url,model})
      resolve(model)
    }

    if( data ) loader.parse(data, "", onLoad )
    else       loader.load(url, onLoad )
  })
}

xrf.navigator.init = () => {
  if( xrf.navigator.init.inited ) return

  window.addEventListener('popstate', function (event){
    xrf.navigator.to( document.location.search.substr(1) + document.location.hash )
  })
  
  window.addEventListener('hashchange', function (e){
    xrf.emit('hash', {hash: document.location.hash })
  })

  // this allows selectionlines to be updated according to the camera (renderloop)
  xrf.focusLine = new xrf.THREE.Group()
  xrf.focusLine.material = new xrf.THREE.LineDashedMaterial({color:0xFF00FF,linewidth:3, scale: 1, dashSize: 0.2, gapSize: 0.1,opacity:0.3, transparent:true})
  xrf.focusLine.isXRF = true
  xrf.focusLine.position.set(0,0,-0.5);
  xrf.focusLine.points = []
  xrf.focusLine.lines  = []
  xrf.camera.add(xrf.focusLine)

  xrf.navigator.init.inited = true
}

xrf.navigator.updateHash = (hash,opts) => {
  if( hash.replace(/^#/,'') == document.location.hash.substr(1) || hash.match(/\|/) ) return  // skip unnecesary pushState triggers
  console.log(`URL: ${document.location.search.substr(1)}#${hash}`)
  document.location.hash = hash
  xrf.emit('hash', {...opts, hash: `#${hash}` })
}

xrf.navigator.pushState = (file,hash) => {
  if( file == document.location.search.substr(1) ) return // page is in its default state
  window.history.pushState({},`${file}#${hash}`, document.location.pathname + `?${file}#${hash}` )
  xrf.emit('pushState', {file, hash} )
}
xrf.addEventListener('env', (opts) => {
  let { frag, mesh, model, camera, scene, renderer, THREE} = opts
  if( frag.env && !scene.environment ){
    //let env = scene.getObjectByName(frag.env.string)
    //if( !env ) env = xrf.scene.getObjectByName(frag.env.string) // repurpose from parent scene
    //if( !env ) return console.warn("xrf.env "+frag.env.string+" not found")
    //env.material.map.mapping = THREE.EquirectangularReflectionMapping;
    //scene.environment = env.material.map
    //scene.texture = env.material.map    
 //   renderer.toneMapping = THREE.ACESFilmicToneMapping;
 //   renderer.toneMappingExposure = 2;
    console.log(`   └ applied image '${frag.env.string}' as environment map`)
  }

})
/**
 * 
 * navigation, portals & mutations
 * 
 * | fragment | type | scope | example value |
 * |`href`| string (uri or predefined view) | 🔒 |`#pos=1,1,0`<br>`#pos=1,1,0&rot=90,0,0`<br>`#pos=pyramid`<br>`#pos=lastvisit|pyramid`<br>`://somefile.gltf#pos=1,1,0`<br> |
 * 
 * [[» example implementation|https://github.com/coderofsalvation/xrfragment/blob/main/src/3rd/three/xrf/href.js]]<br>
 * [[» example 3D asset|https://github.com/coderofsalvation/xrfragment/blob/main/example/assets/href.gltf#L192]]<br>
 * [[» discussion|https://github.com/coderofsalvation/xrfragment/issues/1]]<br>
 *
 * [img[xrfragment.jpg]]
 * 
 * 
 * !!!spec 1.0
 * 
 * 1. an ''external''- or ''file URI'' fully replaces the current scene and assumes `pos=0,0,0&rot=0,0,0` by default (unless specified)
 * 
 * 2. navigation should not happen when queries (`q=`) are present in local url: queries will apply (`pos=`, `rot=` e.g.) to the targeted object(s) instead.
 * 
 * 3. navigation should not happen ''immediately'' when user is more than 2 meter away from the portal/object containing the href (to prevent accidental navigation e.g.)
 * 
 * 4. URL navigation should always be reflected in the client (in case of javascript: see [[here|https://github.com/coderofsalvation/xrfragment/blob/dev/src/3rd/three/navigator.js]] for an example navigator).
 * 
 * 5. In XR mode, the navigator back/forward-buttons should be always visible (using a wearable e.g., see [[here|https://github.com/coderofsalvation/xrfragment/blob/dev/example/aframe/sandbox/index.html#L26-L29]] for an example wearable)
 * 
 * [img[navigation.png]]
 * 
 */

xrf.frag.href = function(v, opts){
  let { frag, mesh, model, camera, scene, renderer, THREE} = opts

  if( mesh.userData.XRF.href.exec ) return // mesh already initialized

  let click = mesh.userData.XRF.href.exec = (e) => {

    let lastPos   = `pos=${camera.position.x.toFixed(2)},${camera.position.y.toFixed(2)},${camera.position.z.toFixed(2)}`
    xrf
    .emit('href',{click:true,mesh,xrf:v}) // let all listeners agree
    .then( () => {
      let {urlObj,dir,file,hash,ext} = xrf.parseUrl(v.string)
      //if( !file.match(/\./) || file.match(/\.html/) ){
      //  debugger
      //  let inIframe
      //  try { inIframe = window.self !== window.top; } catch (e) { inIframe = true; }
      //  return inIframe ? window.parent.postMessage({ url: v.string }, '*') : window.open( v.string, '_blank')
      //}
      const flags = v.string[0] == '#' ? xrf.XRF.PV_OVERRIDE : undefined
      let toFrag = xrf.URI.parse( v.string, xrf.XRF.NAVIGATOR | xrf.XRF.PV_OVERRIDE | xrf.XRF.METADATA )
      // always commit current location (keep a trail of last positions before we navigate)
      if( !e.nocommit && !document.location.hash.match(lastPos) ) xrf.navigator.to(`#${lastPos}`)
      xrf.navigator.to(v.string)    // let's surf to HREF!
    }) 
    .catch( console.error )
  }

  let selected = mesh.userData.XRF.href.selected = (state) => () => {
    if( mesh.selected == state ) return // nothing changed 
    xrf.interactive.objects.map( (o) => {
      let newState = o.name == mesh.name ? state : false
      if( o.material ){
        if( o.material.uniforms ) o.material.uniforms.selected.value = newState 
        //if( o.material.emissive ) o.material.emissive.r = o.material.emissive.g = o.material.emissive.b = newState ? 2.0 : 1.0
        if( o.material.emissive ){ 
          if( !o.material.emissive.original ) o.material.emissive.original = o.material.emissive.clone()
          o.material.emissive.r = o.material.emissive.g = o.material.emissive.b = 
            newState ? o.material.emissive.original.r + 0.5 : o.material.emissive.original.r
        }
      }
    })
    // update mouse cursor
    if( !renderer.domElement.lastCursor )
      renderer.domElement.lastCursor = renderer.domElement.style.cursor
    renderer.domElement.style.cursor = state ? 'pointer' : renderer.domElement.lastCursor 

    xrf
    .emit('href',{selected:state,mesh,xrf:v}) // let all listeners agree
    .then( () => mesh.selected = state )
  }

  mesh.addEventListener('click', click )
  mesh.addEventListener('mousemove', selected(true) )
  mesh.addEventListener('mouseenter', selected(true) )
  mesh.addEventListener('mouseleave', selected(false) )

  if( mesh.material ) mesh.material = mesh.material.clone() // clone, so we can individually highlight meshes

  // lazy add mesh (because we're inside a recursive traverse)
  setTimeout( (mesh) => {
    xrf.interactive.add(mesh)
    xrf.emit('interactionReady', {mesh,xrf:v,clickHandler: mesh.userData.XRF.href.exec })
  }, 0, mesh )
}

/**
 * > above solutions were abducted from [[this|https://i.imgur.com/E3En0gJ.png]] and [[this|https://i.imgur.com/lpnTz3A.png]] survey result
 *
 * !!!Demo
 * 
 * <$videojs controls="controls" aspectratio="16:9" preload="auto" poster="" fluid="fluid" class="vjs-big-play-centered">
 *   <source src="https://coderofsalvation.github.io/xrfragment.media/href.mp4" type="video/mp4"/>
 * </$videojs>
 * 
 * > capture of <a href="./example/aframe/sandbox" target="_blank">aframe/sandbox</a>
 */
xrf.frag.pos = function(v, opts){
  let { frag, mesh, model, camera, scene, renderer, THREE} = opts


  // spec: indirect coordinate using objectname: https://xrfragment.org/#navigating%203D
  if( v.x == undefined ){
    let obj = scene.getObjectByName(v.string)
    if( !obj ) return 
    let pos = obj.position.clone()
    obj.getWorldPosition(pos)
    camera.position.copy(pos)
  }else{ 
    // spec: direct coordinate: https://xrfragment.org/#navigating%203D
    camera.position.x = v.x
    camera.position.y = v.y
    camera.position.z = v.z
  }
}
xrf.frag.rot = function(v, opts){
  let { frag, mesh, model, camera, scene, renderer, THREE} = opts
  console.log("   └ setting camera rotation to "+v.string)
  camera.rotation.set( 
    v.x * Math.PI / 180,
    v.y * Math.PI / 180,
    v.z * Math.PI / 180
  )
  camera.updateMatrixWorld()
}
// *TODO* use webgl instancing

xrf.frag.src = function(v, opts){
  opts.embedded = v // indicate embedded XR fragment
  let { mesh, model, camera, scene, renderer, THREE, hashbus, frag} = opts

  let url      = v.string
  let srcFrag  = opts.srcFrag = xrfragment.URI.parse(url)
  opts.isLocal = v.string[0] == '#'
  opts.isPortal = xrf.frag.src.renderAsPortal(mesh)

  if( opts.isLocal ){
        xrf.frag.src.localSRC(url,srcFrag,opts)     // local
  }else xrf.frag.src.externalSRC(url,srcFrag,opts)  // external file
}

xrf.frag.src.addModel = (model,url,frag,opts) => {
  let {mesh} = opts
  let scene = model.scene
  scene = xrf.frag.src.filterScene(scene,{...opts,frag})         // get filtered scene
  if( mesh.material && !mesh.userData.src ) mesh.material.visible = false  // hide placeholder object
  //enableSourcePortation(scene)
  if( xrf.frag.src.renderAsPortal(mesh) ){
    // only add remote objects, because 
    // local scene-objects are already added to scene
    xrf.portalNonEuclidian({...opts,model,scene:model.scene})
    if( !opts.isLocal ) xrf.scene.add(scene) 
  }else{
    xrf.frag.src.scale( scene, opts, url )           // scale scene
    mesh.add(scene)
    xrf.emit('parseModel', {...opts, scene, model}) 
  }
  // flag everything isSRC & isXRF
  mesh.traverse( (n) => { n.isSRC = n.isXRF = n[ opts.isLocal ? 'isSRCLocal' : 'isSRCExternal' ] = true })
}

xrf.frag.src.renderAsPortal = (mesh) => {
  // *TODO* should support better isFlat(mesh) check
  const isPlane           = mesh.geometry && mesh.geometry.attributes.uv && mesh.geometry.attributes.uv.count == 4 
  return xrf.hasNoMaterial(mesh) && isPlane
}

xrf.frag.src.enableSourcePortation = (src) => {
  // show sourceportation clickable plane
  if( srcFrag.href || v.string[0] == '#' ) return
  let scale = new THREE.Vector3()
  let size  = new THREE.Vector3()
  mesh.getWorldScale(scale)
  new THREE.Box3().setFromObject(src).getSize(size)
  const geo    = new THREE.SphereGeometry( Math.max(size.x, size.y, size.z) / scale.x, 10, 10 )
  const mat    = new THREE.MeshBasicMaterial()
  mat.transparent = true
  mat.roughness = 0.05
  mat.metalness = 1
  mat.opacity = 0
  const cube = new THREE.Mesh( geo, mat )
  console.log("todo: sourceportate")
  return xrf.frag.src
}

xrf.frag.src.externalSRC = (url,frag,opts) => {
  fetch(url, { method: 'HEAD' })
  .then( (res) => {
    console.log(`loading src ${url}`)
    let mimetype = res.headers.get('Content-type')
    if( url.replace(/#.*/,'').match(/\.(gltf|glb)$/)    ) mimetype = 'gltf'
    //if( url.match(/\.(fbx|stl|obj)$/) ) mimetype = 
    opts = { ...opts, frag, mimetype }
    return xrf.frag.src.type[ mimetype ] ? xrf.frag.src.type[ mimetype ](url,opts) : xrf.frag.src.type.unknown(url,opts)
  })
  .then( (model) => {
    if( model && model.scene ) xrf.frag.src.addModel(model, url, frag, opts )
  })
  .finally( () => { })
  .catch( console.error )
  return xrf.frag.src
}

xrf.frag.src.localSRC = (url,frag,opts) => {
  let {model,mesh,scene} = opts
  setTimeout( () => {
    if( mesh.material ) mesh.material = mesh.material.clone() // clone, so we can individually highlight meshes
    let _model = {
      animations: model.animations,
      scene: scene.clone() // *TODO* opts.isPortal ? scene : scene.clone()
    }
    _model.scenes = [_model.scene]
    xrf.frag.src.addModel(_model,url,frag, opts)    // current file 
  },500 )
}

// scale embedded XR fragments https://xrfragment.org/#scaling%20of%20instanced%20objects
xrf.frag.src.scale = function(scene, opts, url){
    let { mesh, model, camera, renderer, THREE} = opts

    // remove invisible objects (hidden by selectors) which might corrupt boundingbox size-detection 
    let cleanScene = scene.clone()
    if( !cleanScene ) debugger
    let remove = []
    const notVisible = (n) => !n.visible || (n.material && !n.material.visible)
    cleanScene.traverse( (n) => notVisible(n) && n.children.length == 0 && (remove.push(n)) )
    remove.map( (n) => n.removeFromParent() )

    let restrictTo3DBoundingBox = mesh.geometry
    if( restrictTo3DBoundingBox ){ 
      // spec 3 of https://xrfragment.org/#src
      // spec 1 of https://xrfragment.org/#scaling%20of%20instanced%20objects  
      // normalize instanced objectsize to boundingbox
      let sizeFrom  = new THREE.Vector3()
      let sizeTo    = new THREE.Vector3()
      let empty = new THREE.Object3D()
      new THREE.Box3().setFromObject(mesh).getSize(sizeTo)
      new THREE.Box3().setFromObject(cleanScene).getSize(sizeFrom)
      let ratio = sizeFrom.divide(sizeTo)
      scene.scale.multiplyScalar( 1.0 / Math.max(ratio.x, ratio.y, ratio.z));
    }else{
      // spec 4 of https://xrfragment.org/#src
      // spec 2 of https://xrfragment.org/#scaling%20of%20instanced%20objects
      scene.scale.multiply( mesh.scale ) 
    }
    scene.isXRF = model.scene.isSRC = true
}

xrf.frag.src.filterScene = (scene,opts) => {
  let { mesh, model, camera, renderer, THREE, hashbus, frag} = opts

  scene = xrf.filter.scene({scene,frag,reparent:true}) // *TODO* ,copyScene: opts.isPortal})

  if( !opts.isLocal ){
    scene.traverse( (m) => {
      if( m.userData && (m.userData.src || m.userData.href) ) return ; // prevent infinite recursion 
      hashbus.pub.mesh(m,{scene,recursive:true})                       // cool idea: recursion-depth based distance between face & src
    })
  }
  return scene
}

/*
 * replace the src-mesh with the contents of the src
 */

xrf.frag.src.type = {}

/*
 * mimetype: unknown 
 */

xrf.frag.src.type['unknown'] = function( url, opts ){
  return new Promise( (resolve,reject) => {
    reject(`${url} mimetype '${opts.mimetype}' not found or supported (yet)`)
  })
}
xrf.frag.t = function(v, opts){
  let { frag, mesh, model, camera, scene, renderer, THREE} = opts
  if( !model.mixer ) return 
  if( !model.animations || model.animations[0] == undefined ) return console.warn('no animation in scene')

  xrf.mixers.map ( (mixer) => {
    
    mixer.t = v
    
    // update speed
    mixer.timeScale     = mixer.loop.speed = v.x
    mixer.loop.speedAbs = Math.abs(v.x)

    if( v.y != undefined || v.z != undefined ) mixer.updateLoop( v )

    // play animations
    mixer.play( v )
  })
}

xrf.frag.t.default = {
  x:0,  // (play from) offset (in seconds)  
  y:0   // optional: (stop at) offset (in seconds)
}

// setup animation mixer for global scene & src scenes
xrf.addEventListener('parseModel', (opts) => {
  let {model} = opts
  let mixer   = model.mixer = new xrf.THREE.AnimationMixer(model.scene)
  mixer.model = model
  mixer.loop      = {timeStart:0,timeStop:0}
  mixer.i         = xrf.mixers.length
  mixer.actions   = []

  model.animations.map( (anim) => { 
    anim.optimize()
    console.log("action: "+anim.name)
    mixer.actions.push( mixer.clipAction( anim, model.scene ) )
  })


  mixer.checkZombies = (animations) => {
    if( mixer.zombieCheck ) return // fire only once
    animations.map( (anim) => {  
      // collect zombie animations and warn user
      let zombies = anim.tracks.map( (t) => {
        let name = t.name.replace(/\..*/,'')
        let obj  = model.scene.getObjectByName(name)
        return !model.scene.getObjectByName(name) ? {anim:anim.name,obj:name} : undefined 
      })
      if( zombies.length > 0 && mixer.i == 0 ){ // only warn for zombies in main scene (because src-scenes might be filtered anyways)
        zombies
        .filter( (z) => z ) // filter out undefined
        .map( (z) => console.warn(`gltf: object '${z.obj}' not found (anim: '${z.anim}'`) )
        console.warn(`TIP: remove dots in objectnames in blender (which adds dots when duplicating)`)
      } 
    })
    mixer.zombieCheck = true
  }

  mixer.play  = (t) => {
    mixer.isPlaying = t.x != 0
    mixer.updateLoop(t)
    xrf.emit( mixer.isPlaying === false ? 'stop' : 'play',{isPlaying: mixer.isPlaying})
  }

  mixer.stop = () => {
    mixer.play(false)
  }

  mixer.updateLoop = (t) => {
    mixer.loop.timeStart = t.y != undefined ? t.y : mixer.loop.timeStart
    mixer.loop.timeStop  = t.z != undefined ? t.z : mixer.loop.timeStop
    mixer.actions.map( (action) => { 
      if( mixer.loop.timeStart != undefined ){
        action.time = mixer.loop.timeStart
        action.setLoop( xrf.THREE.LoopOnce, )
        action.timeScale = mixer.timeScale
        action.enabled = true
        if( t.x != 0 ){ 
          action.play() 
        }
      }
    })
    mixer.setTime(mixer.loop.timeStart)
    mixer.time = Math.abs( mixer.loop.timeStart )
    mixer.update(0)
    mixer.checkZombies( model.animations)
  }

  // update loop when needed 
  if( !mixer.update.patched ){
    let update = mixer.update
    mixer.update = function(time){
      mixer.time = Math.abs(mixer.time)
      if( time == 0 ) return update.call(this,time)

      // loop jump
      if( mixer.loop.speed > 0.0 && (mixer.loop.timeStop > 0 && mixer.time > mixer.loop.timeStop) ){ 
        setTimeout( (time,anims) => mixer.updateLoop(time), 0, mixer.loop.timeStart ) // prevent recursion
      }
      return update.call( this, time )
    }
    mixer.update.patched = true
  }

  // calculate total duration/frame based on longest animation
  mixer.duration  = 0
  if( model.animations.length ){
    model.animations.map( (a) => mixer.duration = ( a.duration > mixer.duration ) ? a.duration : mixer.duration )
  }

  xrf.mixers.push(mixer)
})

if( document.location.hash.match(/t=/) ){
  let url = document.location.href
  let playAfterUserGesture = () => {
    xrf.hashbus.pub(url) // re-post t fragment on the hashbus again
    window.removeEventListener('click',playAfterUserGesture)
    window.removeEventListener('touchstart',playAfterUserGesture)
  }
  window.addEventListener('click', playAfterUserGesture )
  window.addEventListener('touchstart', playAfterUserGesture )
}

xrf.addEventListener('render', (opts) => {
  let model = xrf.model
  let {time} = opts
  if( !model ) return 
  if( xrf.mixers.length ){
    xrf.mixers.map( (m) => m.isPlaying && (m.update( time )) )

    // update active camera in case selected by dynamicKey in URI 
    if( xrf.model.camera && model.mixer.isPlaying ){

      let cam = xrf.camera.getCam() 
      // cam.fov = model.cameras[0].fov (why is blender not exporting radians?)
      cam.far = model.cameras[0].far
      cam.near = model.cameras[0].near

      let rig = xrf.camera
      rig.position.copy( model.cameras[0].position )
      rig.position.y -= rig.offsetY // VR/AR compensate camera rig
      //rig.rotation.copy( model.cameras[0].rotation )

      rig.updateProjectionMatrix()
    }
  }
})

xrf.addEventListener('dynamicKey', (opts) => {
  // select active camera if any
  let {id,match,v} = opts
  match.map( (w) => {
    w.nodes.map( (node) => {
      if( node.isCamera ){ 
        console.log("setting camera to "+node.name)
        xrf.model.camera = node 
      }
    })
  })
})
xrf.getCollisionMeshes = () => {
  let meshes = []
  xrf.scene.traverse( (n) => {
    if( !n.userData.href && !n.userData.src && xrf.hasNoMaterial(n) ){
      meshes.push(n)
    }
  })
  return meshes
}
// wrapper to survive in/outside modules

xrf.interactiveGroup = function(THREE,renderer,camera){

  let {
    Group,
    Matrix4,
    Raycaster,
    Vector2
  } = THREE 

  const _pointer = new Vector2();
  const _event = { type: '', data: _pointer };
  let object   = {selected:false}

  class interactive extends Group {

    constructor( renderer, camera ) {

      super();

      if( !renderer || !camera ) return 

      // extract camera when camera-rig is passed
      camera.traverse( (n) =>  String(n.type).match(/Camera/) ? camera = n : null )

      const scope = this;
      scope.objects = []

      const raycaster = new Raycaster();
      const tempMatrix = new Matrix4();

      // Pointer Events

      const element = renderer.domElement;

      function onPointerEvent( event ) {

        //event.stopPropagation();

        const rect = renderer.domElement.getBoundingClientRect();

        _pointer.x = ( event.clientX - rect.left ) / rect.width * 2 - 1;
        _pointer.y = - ( event.clientY - rect.top ) / rect.height * 2 + 1;

        raycaster.setFromCamera( _pointer, camera );

        const intersects = raycaster.intersectObjects( scope.objects, false );

        if ( intersects.length > 0 ) {

          const intersection = intersects[ 0 ];

          object = intersection.object;
          const uv = intersection.uv;

          _event.type = event.type;
          _event.data.set( uv.x, 1 - uv.y );
          object.dispatchEvent( _event );

        }else{
          if( object.selected ) {
            _event.type = 'mouseleave'
            object.dispatchEvent(_event)
          }
        }

      }

      element.addEventListener( 'pointerdown', onPointerEvent );
      element.addEventListener( 'pointerup', onPointerEvent );
      element.addEventListener( 'pointermove', onPointerEvent );
      element.addEventListener( 'mousedown', onPointerEvent );
      element.addEventListener( 'mousemove', onPointerEvent );
      element.addEventListener( 'click', onPointerEvent );
      element.addEventListener( 'mouseup', onPointerEvent );

      // WebXR Controller Events
      // TODO: Dispatch pointerevents too

      const events = {
        'move': 'mousemove',
        'select': 'click',
        'selectstart': 'mousedown',
        'selectend': 'mouseup'
      };

      function onXRControllerEvent( event ) {

        const controller = event.target;

        tempMatrix.identity().extractRotation( controller.matrixWorld );

        raycaster.ray.origin.setFromMatrixPosition( controller.matrixWorld );
        raycaster.ray.direction.set( 0, 0, - 1 ).applyMatrix4( tempMatrix );

        const intersections = raycaster.intersectObjects( scope.objects, false );

        if ( intersections.length > 0 ) {

          const intersection = intersections[ 0 ];

          object = intersection.object;
          const uv = intersection.uv;

          _event.type = events[ event.type ];
          _event.data.set( uv.x, 1 - uv.y );

          object.dispatchEvent( _event );

        }else{
          if( object.selected ) {
            _event.type = 'mouseleave'
            object.dispatchEvent(_event)
          }
        }

      }

      const controller1 = renderer.xr.getController( 0 );
      controller1.addEventListener( 'move', onXRControllerEvent );
      controller1.addEventListener( 'select', onXRControllerEvent );
      controller1.addEventListener( 'selectstart', onXRControllerEvent );
      controller1.addEventListener( 'selectend', onXRControllerEvent );

      const controller2 = renderer.xr.getController( 1 );
      controller2.addEventListener( 'move', onXRControllerEvent );
      controller2.addEventListener( 'select', onXRControllerEvent );
      controller2.addEventListener( 'selectstart', onXRControllerEvent );
      controller2.addEventListener( 'selectend', onXRControllerEvent );

    }

    add(obj, unparent){
      if( unparent ) Group.prototype.add.call( this, obj )
      this.objects.push(obj)
    }

  }

  return new interactive(renderer,camera)
}
/* 
 * TODO: refactor/fix this (queries are being refactored to filters)
 */


xrf.addEventListener('dynamicKey', (opts) => {
  let {scene,id,match,v} = opts
  if( v.filter ){
    let frags = {}
    frags[ v.filter.key ] = v
    xrf.filter.scene({frag:frags,scene})
  }
})

// spec: https://xrfragment.org/#filters
xrf.filter = function(query, cb){
  let result = []
  if( !query     ) return result
  if( query[0] != '#' ) query = '#'+query
  // *TODO* jquery like utility func
  return result
}

xrf.filter.scene = function(opts){
  let {scene,frag} = opts

  scene = xrf.filter 
  .sort(frag)               // get (sorted) filters from XR Fragments
  .process(frag,scene,opts) // show/hide things

  scene.visible = true   // always enable scene

  return scene
}

xrf.filter.sort = function(frag){
  // get all filters from XR Fragments
  frag.filters = Object.values(frag)
                      .filter( (v) => v.filter ? v : null )
                      .sort( (a,b) => a.index > b.index )
  return xrf.filter
}

// opts = {copyScene:true} in case you want a copy of the scene (not filter the current scene inplace)
xrf.filter.process = function(frag,scene,opts){
  const cleanupKey   = (k) => k.replace(/[-\*\/]/g,'')
  let firstFilter    = frag.filters.length ? frag.filters[0].filter.get() : false 
  const hasName      = (m,name,filter)        => m.name == name 
  const hasNameOrTag = (m,name_or_tag,filter) => hasName(m,name_or_tag) || 
                                                 String(m.userData['tag']).match( new RegExp("(^| )"+name_or_tag) )

  // utility functions
  const getOrCloneMaterial = (o) => {
    if( o.material ){
      if( o.material.isXRF ) return o.material
      o.material = o.material.clone()
      o.material.isXRF = true
      return o.material
    }
    return {}
  }
  const setVisible = (n,visible,filter,processed) => {
    if( processed && processed[n.uuid] ) return 
    getOrCloneMaterial(n).visible = visible
    if( filter.deep ) n.traverse( (m) => getOrCloneMaterial(m).visible = visible )
    if( processed ) processed[n.uuid] == true 
  }

  // spec 2: https://xrfragment.org/doc/RFC_XR_Macros.html#embedding-xr-content-using-src
  // reparent scene based on objectname in case it matches a (non-negating) selector 
  if( opts.reparent && firstFilter && !firstFilter.value && firstFilter.show === true ){
    let obj 
    frag.target = firstFilter
    scene.traverse( (n) => hasName(n, firstFilter.key,firstFilter) && (obj = n) )
    console.log("reparent "+firstFilter.key+" "+((opts.copyScene)?"copy":"inplace"))
    if(obj ){
      obj.position.set(0,0,0)
      if( opts.copyScene ){
        opts.copyScene = new xrf.THREE.Scene()
        opts.copyScene.children[0] = obj 
        scene = opts.copyScene
      }else{
        // empty current scene and add obj
        while( scene.children.length > 0 ) scene.children[0].removeFromParent()
        scene.add( obj )
      }
    }
  }

  // then show/hide things based on secondary selectors
  // we don't use the XRWG (everything) because we process only the given (sub)scene
  frag.filters.map( (v) => {
    const filter  = v.filter.get()
    const name_or_tag = cleanupKey(v.fragment)
    let processed = {}
    let extembeds = {}

    // hide external objects temporarely
    scene.traverse( (m) => {
      if( m.isSRCExternal ){
        m.traverse( (n) => (extembeds[ n.uuid ] = m) && (m.visible = false) )
      }
    })

    scene.traverseVisible( (m) => {
      // filter on value(expression) #foo=>3 e.g. *TODO* do this in XRWG
      if( filter.value && m.userData[filter.key] ){
        const visible = v.filter.testProperty(filter.key, m.userData[filter.key], filter.show === false )
        setVisible(m,visible,filter,processed)
        return
      }
      if( hasNameOrTag(m,name_or_tag,filter ) ){
        setVisible(m,filter.show,filter)
      }
    })

    // show external objects again 
    for ( let i in extembeds ) extembeds[i].visible = true
  })

  return scene 
}

xrf.frag.defaultPredefinedViews = (opts) => {
  let {scene,model} = opts;
  scene.traverse( (n) => {
    if( n.userData && n.userData['#'] ){
      let frag = xrf.URI.parse( n.userData['#'] )
      xrf.hashbus.pub( n.userData['#'] )          // evaluate static XR fragments
      xrf.hashbus.pub.XRWG({frag,model,scene})    // evaluate dynamic XR fragment using XRWG (see spec)
    }
  })
}

// react to enduser typing url
xrf.addEventListener('hash', (opts) => {
  let frag = xrf.URI.parse( opts.hash )
  xrf.hashbus.pub.XRWG({frag,scene:xrf.scene})
}) 

// clicking href url with predefined view 
xrf.addEventListener('href', (opts) => {
  if( !opts.click || opts.xrf.string[0] != '#' ) return 
  let frag = xrf.URI.parse( opts.xrf.string, xrf.XRF.NAVIGATOR | xrf.XRF.PV_OVERRIDE | xrf.XRF.METADATA )
  xrf.hashbus.pub.XRWG({frag,scene:xrf.scene,href:opts.xrf})
}) 
xrf.addEventListener('dynamicKeyValue', (opts) => {
  let {scene,match,v} = opts
  let objname         = v.fragment
  let autoscroll      = v.z > 0 || v.w > 0 

  scene.traverse( (mesh) => {
    if( mesh.name == objname ){
      if( !mesh.geometry ) return console.warn(`mesh '${objname}' has no uvcoordinates to offset`)
      let uv = mesh.geometry.getAttribute("uv")
      if( !uv.old ) uv.old = uv.clone()

      for( let i = 0; i < uv.count; i++ ){
        uv.setXY(i, uv.old.getX(i) + v.x, uv.old.getY(i) + v.y )
      }

      if( autoscroll ){
        if( mesh.removeUVListener ) mesh.removeUVListener()
        mesh.removeUVListener = xrf.addEventListener('render', (opts) => {
          let {time} = opts
          for( let i = 0; i < uv.count; i++ ){
            uv.setXY(i, uv.getX(i) + v.z * time, uv.getY(i) + v.w * time)
          }
          uv.needsUpdate = true
        })
      }
      
      uv.needsUpdate = true
    }
  })
})
xrf.addEventListener('dynamicKey', (opts) => {
  let {scene,id,match,v} = opts
  if( !scene ) return 
  let remove = []
  // erase previous lines
  xrf.focusLine.lines.map( (line) => line.parent && (line.parent.remove(line))  )
  xrf.focusLine.points = []
  xrf.focusLine.lines  = []

  // drawlines
  match.map( (w) => {
    w.nodes.map( (mesh) => xrf.drawLineToMesh({ ...opts, mesh}) )
  })
})

xrf.drawLineToMesh = (opts) => {
  let {scene,mesh,frag,id} = opts
  const THREE = xrf.THREE
  let oldSelection
  // Selection of Interest if predefined_view matches object name
  if( mesh.visible && mesh.material){
    xrf.emit('focus',{...opts,frag})
    .then( () => {
      const color    = new THREE.Color();
      const colors   = []
      let from       = new THREE.Vector3()

      let getCenterPoint = (mesh) => {
        var geometry = mesh.geometry;
        geometry.computeBoundingBox();
        var center = new THREE.Vector3();
        geometry.boundingBox.getCenter( center );
        mesh.localToWorld( center );
        return center;
      }         

      let cam = xrf.camera.getCam ? xrf.camera.getCam() : xrf.camera // *FIXME* camerarig/rig are conflicting
      cam.updateMatrixWorld(true); // always keeps me diving into the docs :]
      cam.getWorldPosition(from)
      from.y = 0.5 // originate from the heart chakra! :p
      const points = [from, getCenterPoint(mesh) ]
      const geometry = new THREE.BufferGeometry().setFromPoints( points );
      let line = new THREE.Line( geometry, xrf.focusLine.material );
      line.isXRF = true
      line.computeLineDistances();
      xrf.focusLine.lines.push(line)
      xrf.focusLine.points.push(from)
      xrf.focusLine.opacity = 1
      scene.add(line)
    })
  }
}

xrf.addEventListener('render', (opts) => {
  // update focusline 
  let {time,model} = opts
  if( !xrf.clock ) return 
  xrf.focusLine.material.color.r  = (1.0 + Math.sin( xrf.clock.getElapsedTime()*10  ))/2
  xrf.focusLine.material.dashSize = 0.2 + 0.02*Math.sin( xrf.clock.getElapsedTime()  )
  xrf.focusLine.material.gapSize  = 0.1 + 0.02*Math.sin( xrf.clock.getElapsedTime() *3  )
  xrf.focusLine.material.opacity  = (0.25 + 0.15*Math.sin( xrf.clock.getElapsedTime() * 3 )) * xrf.focusLine.opacity;
  if( xrf.focusLine.opacity > 0.0 ) xrf.focusLine.opacity -= time*0.2
  if( xrf.focusLine.opacity < 0.0 ) xrf.focusLine.opacity = 0
})
/*
 * mimetype: audio/aac 
 * mimetype: audio/mpeg 
 * mimetype: audio/ogg 
 * mimetype: audio/weba 
 * mimetype: audio/wav 
 */

let loadAudio = (mimetype) => function(url,opts){
  let {mesh,src,camera,THREE} = opts
  let {urlObj,dir,file,hash,ext} = xrf.parseUrl(url)
  let frag = xrf.URI.parse( url )

  /* WebAudio: setup context via THREEjs */
  if( !camera.listener ){
    camera.listener = new THREE.AudioListener();
    // *FIXME* camera vs camerarig conflict
    (camera.getCam ? camera.getCam() : camera).add( camera.listener );
  }

  let isPositionalAudio = !(mesh.position.x == 0 && mesh.position.y == 0 && mesh.position.z == 0)
  const audioLoader = new THREE.AudioLoader();
  let sound = isPositionalAudio ? new THREE.PositionalAudio( camera.listener) 
                                : new THREE.Audio( camera.listener )

  audioLoader.load( url.replace(/#.*/,''), function( buffer ) {

    sound.setBuffer( buffer );
    sound.setLoop(false);
    sound.setVolume(1.0);
    if( isPositionalAudio ){
      sound.setRefDistance( mesh.scale.x);
      sound.setRolloffFactor(20.0)
      //sound.setDirectionalCone( 360, 360, 0.01 );
    }

    sound.playXRF = (t) => {
      mesh.add(sound)
      try{
        if( sound.isPlaying && t.y != undefined ) sound.stop()
        if( sound.isPlaying && t.y == undefined ) sound.pause()

        let hardcodedLoop = frag.t != undefined
        t = hardcodedLoop ? { ...frag.t, x: t.x} : t // override with hardcoded metadata except playstate (x)
        if( t && t.x != 0 ){
          // *TODO* https://stackoverflow.com/questions/12484052/how-can-i-reverse-playback-in-web-audio-api-but-keep-a-forward-version-as-well 
          t.x = Math.abs(t.x)
          sound.setPlaybackRate( t.x ) // WebAudio does not support negative playback
          // setting loop
          if( t.z ) sound.setLoop( true )
          // apply embedded audio/video samplerate/fps or global mixer fps
          let loopStart = hardcodedLoop ? t.y : t.y * buffer.sampleRate;
          let loopEnd   = hardcodedLoop ? t.z : t.z * buffer.sampleRate;
          let timeStart = loopStart > 0 ? loopStart : (t.y == undefined ? xrf.model.mixer.time : t.y)

          if( t.z > 0 ) sound.setLoopEnd(   loopEnd   )
          if( t.y != undefined ){ 
            sound.setLoopStart( loopStart )
            sound.offset = loopStart 
          }
          sound.play()
        }
      }catch(e){ console.warn(e) }
    }
    mesh.audio = sound
  });
}

let audioMimeTypes = [
  'audio/wav',
  'audio/mpeg',
  'audio/mp3',
  'audio/weba',
  'audio/aac',
  'application/ogg'
]
audioMimeTypes.map( (mimetype) =>  xrf.frag.src.type[ mimetype ] = loadAudio(mimetype) )

// listen to t XR fragment changes
xrf.addEventListener('t', (opts) => {
  let t = opts.frag.t
  xrf.scene.traverse( (n) => n.audio && n.audio.playXRF && (n.audio.playXRF(t)) )
})
/*
 * mimetype: model/gltf+json
 */

xrf.frag.src.type['gltf'] = function( url, opts ){
  return new Promise( (resolve,reject) => {
    let {mesh,src} = opts
    let {urlObj,dir,file,hash,ext} = xrf.parseUrl(url)
    let loader

    const Loader = xrf.loaders[ext]
    if( !Loader ) throw 'xrfragment: no loader passed to xrfragment for extension .'+ext 
    if( !dir.match("://") ){ // force relative path 
      dir = dir[0] == './' ? dir : `./${dir}`
      loader = new Loader().setPath( dir )
    }else loader = new Loader()

    loader.load(url, (model) => {
      resolve(model)
    })
  })
}


let loadHTML = (mimetype) => function(url,opts){
  let {mesh,src,camera} = opts
  let {urlObj,dir,file,hash,ext} = xrf.parseUrl(url)
  let frag = xrf.URI.parse( url )
  console.warn("todo: html viewer for src not implemented")
}

let htmlMimeTypes = [
  'text/html'
]
htmlMimeTypes.map( (mimetype) =>  xrf.frag.src.type[ mimetype ] = loadHTML(mimetype) )
/*
 * mimetype: image/png 
 * mimetype: image/jpg 
 * mimetype: image/gif 
 */

xrf.frag.src.type['image/png'] = function(url,opts){
  let {mesh,THREE} = opts
  let restrictTo3DBoundingBox = mesh.geometry

  mesh.material = new xrf.THREE.MeshBasicMaterial({ 
    map: null, 
    transparent: url.match(/(png|gif)/) ? true : false,
    side: THREE.DoubleSide,
    color: 0xFFFFFF,
    opacity:1
  });

  let renderImage = (texture) => {
    let img = {w: texture.source.data.width, h: texture.source.data.height}

    // stretch image by pinning uv-coordinates to corners 
    if( mesh.geometry ){
      if( mesh.geometry.attributes.uv ){ // buffergeometries 
        let uv = mesh.geometry.attributes.uv;
      }else {
        console.warn("xrfragment: uv's of ${url} might be off for non-buffer-geometries *TODO*")
        //if( geometry.faceVertexUvs ){
        // *TODO* force uv's of dynamically created geometries (in threejs)
        //}
      }
    }
    mesh.material.map = texture
    mesh.needsUpdate = true
  } 

  let onLoad = (texture) => {
    texture.colorSpace = THREE.SRGBColorSpace;
    texture.wrapS = THREE.RepeatWrapping;
    texture.wrapT = THREE.RepeatWrapping;
    renderImage(texture)
  }

  new THREE.TextureLoader().load( url, onLoad, null, console.error );

}

xrf.frag.src.type['image/gif'] = xrf.frag.src.type['image/png']
xrf.frag.src.type['image/jpeg'] = xrf.frag.src.type['image/png']

// spec 8: https://xrfragment.org/doc/RFC_XR_Macros.html#embedding-xr-content-using-src

xrf.portalNonEuclidian = function(opts){
  let { frag, mesh, model, camera, scene, renderer} = opts


  mesh.portal = {
    pos: mesh.position.clone(),
    posWorld: new xrf.THREE.Vector3(),
    posWorldCamera: new xrf.THREE.Vector3(),
    stencilRef: xrf.portalNonEuclidian.stencilRef,
    needUpdate: false,
    stencilObject: false,
    cameraDirection: new xrf.THREE.Vector3(),
    cameraPosition: new xrf.THREE.Vector3(),
    raycaster: new xrf.THREE.Raycaster(),
    isLocal: opts.isLocal,
    isLens: false,
    isInside: false,
    setStencil:  (stencilRef) => mesh.portal.stencilObjects.traverse( (n) => showPortal(n, stencilRef == 0) && n.stencil && n.stencil(stencilRef) ),
    positionObjectsIfNeeded: (pos,scale)  => !mesh.portal.isLens &&  mesh.portal.stencilObjects.traverse( (n) =>  n.positionAtStencil && (n.positionAtStencil(pos,scale)) )
  }

  // allow objects to flip between original and stencil position (which puts them behind stencilplane)
  const addStencilFeature = (n) => { 
    if( n.stencil ) return n // run once

    n.stencil = (sRef ) => xrf.portalNonEuclidian.selectStencil(n, sRef )
    n.positionAtStencil = (pos,scale) => (newPos,newScale) => {
      n.position.copy( newPos || pos )
      n.scale.copy( scale )
      n.updateMatrixWorld(true)
    }
    // curry function 
    n.positionAtStencil = n.positionAtStencil( n.position.clone(), n.scale.clone() )
    return n
  }

  this.setupStencilObjects = (scene,opts) => {
    // collect related objects to render inside stencilplane
    let stencilObject         = scene 
    if( opts.srcFrag.target ){
      stencilObject = scene.getObjectByName( opts.srcFrag.target.key ) 
      // spec: if src-object is child of portal (then portal is lens, and should include all children )
      mesh.traverse( (n) => n.name == opts.srcFrag.target.key && (stencilObject = n) && (mesh.portal.isLens = true) ) 
    }

    if( !stencilObject ) return console.warn(`no objects were found (src:${mesh.userData.src}) for (portal)object name '${mesh.name}'`)
    mesh.portal.stencilObject = stencilObject 

    // spec: if src points to child, act as lens
    if( !mesh.portal.isLocal || mesh.portal.isLens )  stencilObject.visible = false 

    let stencilObjects = [stencilObject]
    stencilObjects = stencilObjects
                     .filter( (n) => !n.portal ) // filter out (self)references to portals (prevent recursion)
                     .map(addStencilFeature)

    // put it into a scene (without .add() because it reparents objects) so we can render it separately
    mesh.portal.stencilObjects = new xrf.THREE.Scene()
    mesh.portal.stencilObjects.children = stencilObjects 

    xrf.portalNonEuclidian.stencilRef += 1 // each portal has unique stencil id
    console.log(`enabling portal for object '${mesh.name}' (stencilRef:${mesh.portal.stencilRef})`)
  
    return this
  }

  // enable the stencil-material of the stencil objects to prevent stackoverflow (portal in portal rendering)
  const showPortal = (n,show) => {
    if( n.portal ) n.visible = show
    return true
  }

  this.setupListeners = () => {

    mesh.onAfterRender = function(renderer, scene, camera, geometry, material, group ){
      mesh.portal.needUpdate = true
    }

    xrf.addEventListener('renderPost', (opts) => {
      let {scene,camera,time,render,renderer} = opts

      if( mesh.portal.needUpdate && mesh.portal && mesh.portal.stencilObjects ){  
        let cameraDirection            = mesh.portal.cameraDirection
        let cameraPosition             = mesh.portal.cameraPosition
        let stencilRef                 = mesh.portal.stencilRef
        let newPos                     = mesh.portal.posWorld
        let stencilObject              = mesh.portal.stencilObject
        let newScale                   = mesh.scale 
        let raycaster                  = mesh.portal.raycaster

        let cam = xrf.camera.getCam ? xrf.camera.getCam() : camera
        cam.getWorldPosition(cameraPosition)
        cam.getWorldDirection(cameraDirection)
        if( cameraPosition.distanceTo(newPos) > 20.0 ) return // dont render far portals 

        // init
        if( !mesh.portal.isLocal || mesh.portal.isLens ) stencilObject.visible = true 
        mesh.portal.setStencil(stencilRef)
        renderer.autoClear             = false 
        renderer.autoClearDepth        = false 
        renderer.autoClearColor        = false 
        renderer.autoClearStencil      = false 
        // render
        render( mesh.portal.stencilObjects, camera )
        // de-init 
        renderer.autoClear             = true 
        renderer.autoClearDepth        = true 
        renderer.autoClearColor        = true 
        renderer.autoClearStencil      = true 
        mesh.portal.setStencil(0)
        if( !mesh.portal.isLocal || mesh.portal.isLens ) stencilObject.visible = false 


        // trigger href upon camera collide
        if( mesh.userData.XRF.href ){
          raycaster.far = 0.35
          raycaster.set(cameraPosition, cameraDirection )
          intersects = raycaster.intersectObjects([mesh], false)
          if (intersects.length > 0 && !mesh.portal.teleporting ){
            mesh.portal.teleporting = true
            mesh.userData.XRF.href.exec({nocommit:true})
            setTimeout( () => mesh.portal.teleporting = false, 500) // dont flip back and forth
          }
        }
      }
      mesh.portal.needUpdate = false
    })



    return this
  }

  // turn mesh into stencilplane 
  xrf
  .portalNonEuclidian
  .setMaterial(mesh)
  .getWorldPosition(mesh.portal.posWorld)

  this
  .setupListeners()
  .setupStencilObjects(scene,opts)

  // move portal objects to portalposition
  if( mesh.portal.stencilObjects ) mesh.portal.positionObjectsIfNeeded(mesh.portal.posWorld, mesh.scale)
}

xrf.portalNonEuclidian.selectStencil = (n, stencilRef, nested) => {
  if( n.material ){
    n.material.stencilRef   = stencilRef 
    n.material.stencilWrite = stencilRef > 0 
    n.material.stencilFunc  = xrf.THREE.EqualStencilFunc;
  }
  if( n.children && !nested ) n.traverse( (m) => !m.portal && (xrf.portalNonEuclidian.selectStencil(m,stencilRef,true)) )
}
  
xrf.portalNonEuclidian.setMaterial = function(mesh){
  mesh.material = new xrf.THREE.MeshBasicMaterial({ color: 'orange' });
  mesh.material.depthWrite   = false;
  mesh.material.colorWrite   = false;
  mesh.material.stencilWrite = true;
  mesh.material.stencilRef   = xrf.portalNonEuclidian.stencilRef;
 // mesh.renderOrder           = 0;//xrf.portalNonEuclidian.stencilRef;
  mesh.material.stencilFunc  = xrf.THREE.AlwaysStencilFunc;
  mesh.material.stencilZPass = xrf.THREE.ReplaceStencilOp;
  mesh.material.stencilZFail = xrf.THREE.ReplaceStencilOp;
    //n.material.depthFunc    = stencilRef > 0 ? xrf.THREE.AlwaysDepth : xrf.THREE.LessEqualDepth
  //mesh.material.depthTest    = false;
  return mesh
}

xrf.addEventListener('parseModel',(opts) => {
  const scene = opts.model.scene
  //for( let i in scene.children ) scene.children[i].renderOrder = 10 // render outer layers last (worldspheres e.g.)
})


// (re)set portalObjects when entering/leaving a portal 
let updatePortals = (opts) => {
  xrf.scene.traverse( (n) => {
    if( !n.portal ) return 
    // move objects back to the portal 
    if( n.portal.isInside ) n.portal.positionObjectsIfNeeded( n.portal.posWorld, n.scale )
    n.portal.isInside = false
  })
  if( opts.mesh && opts.mesh.portal && opts.click ){
    opts.mesh.portal.isInside = true
    opts.mesh.portal.positionObjectsIfNeeded() // move objects back to original pos (since we are teleporting there)
  }
}

xrf.addEventListener('href', (opts) => opts.click && updatePortals(opts) )
xrf.addEventListener('navigate', updatePortals )

xrf.portalNonEuclidian.stencilRef = 1

let loadVideo = (mimetype) => function(url,opts){
  let {mesh,src,camera} = opts
  let {urlObj,dir,file,hash,ext} = xrf.parseUrl(url)
  const THREE = xrf.THREE
  let frag = xrf.URI.parse( url )

  let video = mesh.video = document.createElement('video')
  video.setAttribute("crossOrigin","anonymous")
  video.setAttribute("playsinline",'')
  video.addEventListener('loadedmetadata', function(){
    let texture = new THREE.VideoTexture( video );
    texture.colorSpace = THREE.SRGBColorSpace;
    let mat     = new xrf.THREE.MeshBasicMaterial()
    mat.map = texture
    mesh.material = mat
    // set range
    //video.addEventListener('timeupdate', function timeupdate() {
    //  if (frag.t && video.currentTime < frag.t.y || video.currentTime >= frag.t.z ) {
    //      video.currentTime = frag.t.y
    //  }
    //},false)
  })

  video.src = url
  video.playXRF = (t) => {
    video.t = t
    if( t.x == 0 ) video.pause()
    else{
      video.playbackRate = Math.abs( t.x ) // html5 video does not support reverseplay :/
      video.play()
    }
    if( t.y != undefined ) video.time = t.y 
  }
}

let videoMimeTypes = [
  'video/ogg',
  'video/mp4'
]
videoMimeTypes.map( (mimetype) =>  xrf.frag.src.type[ mimetype ] = loadVideo(mimetype) )

// listen to t XR fragment changes
xrf.addEventListener('t', (opts) => {
  let t = opts.frag.t
  xrf.scene.traverse( (n) => n.video && (n.video.playXRF(t)) )
})