<html>
<head>
<script src="../htmlrunner.js"></script>
<script>
// The ray tracer code in this file is written by Adam Burmister. It
// is available in its original form from:
//
// http://labs.flog.nz.co/raytracer/
//
// It has been modified slightly by Google to work as a standalone
// benchmark, but the all the computational code remains
// untouched. This file also contains a copy of the Prototype
// JavaScript framework which is used by the ray tracer.
var checkNumber;
// Create dummy objects if we're not running in a browser.
if (typeof document == 'undefined') {
document = { };
window = { opera: null };
navigator = { userAgent: null, appVersion: "" };
}
// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
/* Prototype JavaScript framework, version 1.5.0
* (c) 2005-2007 Sam Stephenson
*
* Prototype is freely distributable under the terms of an MIT-style license.
* For details, see the Prototype web site: http://prototype.conio.net/
*
/*--------------------------------------------------------------------------*/
//--------------------
var Prototype = {
Version: '1.5.0',
BrowserFeatures: {
XPath: !!document.evaluate
},
ScriptFragment: '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)',
emptyFunction: function() {},
K: function(x) { return x }
}
var Class = {
create: function() {
return function() {
this.initialize.apply(this, arguments);
}
}
}
var Abstract = new Object();
Object.extend = function(destination, source) {
for (var property in source) {
destination[property] = source[property];
}
return destination;
}
Object.extend(Object, {
inspect: function(object) {
try {
if (object === undefined) return 'undefined';
if (object === null) return 'null';
return object.inspect ? object.inspect() : object.toString();
} catch (e) {
if (e instanceof RangeError) return '...';
throw e;
}
},
keys: function(object) {
var keys = [];
for (var property in object)
keys.push(property);
return keys;
},
values: function(object) {
var values = [];
for (var property in object)
values.push(object[property]);
return values;
},
clone: function(object) {
return Object.extend({}, object);
}
});
Function.prototype.bind = function() {
var __method = this, args = $A(arguments), object = args.shift();
return function() {
return __method.apply(object, args.concat($A(arguments)));
}
}
Function.prototype.bindAsEventListener = function(object) {
var __method = this, args = $A(arguments), object = args.shift();
return function(event) {
return __method.apply(object, [( event || window.event)].concat(args).concat($A(arguments)));
}
}
Object.extend(Number.prototype, {
toColorPart: function() {
var digits = this.toString(16);
if (this < 16) return '0' + digits;
return digits;
},
succ: function() {
return this + 1;
},
times: function(iterator) {
$R(0, this, true).each(iterator);
return this;
}
});
var Try = {
these: function() {
var returnValue;
for (var i = 0, length = arguments.length; i < length; i++) {
var lambda = arguments[i];
try {
returnValue = lambda();
break;
} catch (e) {}
}
return returnValue;
}
}
/*--------------------------------------------------------------------------*/
var PeriodicalExecuter = Class.create();
PeriodicalExecuter.prototype = {
initialize: function(callback, frequency) {
this.callback = callback;
this.frequency = frequency;
this.currentlyExecuting = false;
this.registerCallback();
},
registerCallback: function() {
this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
},
stop: function() {
if (!this.timer) return;
clearInterval(this.timer);
this.timer = null;
},
onTimerEvent: function() {
if (!this.currentlyExecuting) {
try {
this.currentlyExecuting = true;
this.callback(this);
} finally {
this.currentlyExecuting = false;
}
}
}
}
String.interpret = function(value){
return value == null ? '' : String(value);
}
Object.extend(String.prototype, {
gsub: function(pattern, replacement) {
var result = '', source = this, match;
replacement = arguments.callee.prepareReplacement(replacement);
while (source.length > 0) {
if (match = source.match(pattern)) {
result += source.slice(0, match.index);
result += String.interpret(replacement(match));
source = source.slice(match.index + match[0].length);
} else {
result += source, source = '';
}
}
return result;
},
sub: function(pattern, replacement, count) {
replacement = this.gsub.prepareReplacement(replacement);
count = count === undefined ? 1 : count;
return this.gsub(pattern, function(match) {
if (--count < 0) return match[0];
return replacement(match);
});
},
scan: function(pattern, iterator) {
this.gsub(pattern, iterator);
return this;
},
truncate: function(length, truncation) {
length = length || 30;
truncation = truncation === undefined ? '...' : truncation;
return this.length > length ?
this.slice(0, length - truncation.length) + truncation : this;
},
strip: function() {
return this.replace(/^\s+/, '').replace(/\s+$/, '');
},
stripTags: function() {
return this.replace(/<\/?[^>]+>/gi, '');
},
stripScripts: function() {
return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
},
extractScripts: function() {
var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
return (this.match(matchAll) || []).map(function(scriptTag) {
return (scriptTag.match(matchOne) || ['', ''])[1];
});
},
evalScripts: function() {
return this.extractScripts().map(function(script) { return eval(script) });
},
escapeHTML: function() {
var div = document.createElement('div');
var text = document.createTextNode(this);
div.appendChild(text);
return div.innerHTML;
},
unescapeHTML: function() {
var div = document.createElement('div');
div.innerHTML = this.stripTags();
return div.childNodes[0] ? (div.childNodes.length > 1 ?
$A(div.childNodes).inject('',function(memo,node){ return memo+node.nodeValue }) :
div.childNodes[0].nodeValue) : '';
},
toQueryParams: function(separator) {
var match = this.strip().match(/([^?#]*)(#.*)?$/);
if (!match) return {};
return match[1].split(separator || '&').inject({}, function(hash, pair) {
if ((pair = pair.split('='))[0]) {
var name = decodeURIComponent(pair[0]);
var value = pair[1] ? decodeURIComponent(pair[1]) : undefined;
if (hash[name] !== undefined) {
if (hash[name].constructor != Array)
hash[name] = [hash[name]];
if (value) hash[name].push(value);
}
else hash[name] = value;
}
return hash;
});
},
toArray: function() {
return this.split('');
},
succ: function() {
return this.slice(0, this.length - 1) +
String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
},
camelize: function() {
var parts = this.split('-'), len = parts.length;
if (len == 1) return parts[0];
var camelized = this.charAt(0) == '-'
? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
: parts[0];
for (var i = 1; i < len; i++)
camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);
return camelized;
},
capitalize: function(){
return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
},
underscore: function() {
return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
},
dasherize: function() {
return this.gsub(/_/,'-');
},
inspect: function(useDoubleQuotes) {
var escapedString = this.replace(/\\/g, '\\\\');
if (useDoubleQuotes)
return '"' + escapedString.replace(/"/g, '\\"') + '"';
else
return "'" + escapedString.replace(/'/g, '\\\'') + "'";
}
});
String.prototype.gsub.prepareReplacement = function(replacement) {
if (typeof replacement == 'function') return replacement;
var template = new Template(replacement);
return function(match) { return template.evaluate(match) };
}
String.prototype.parseQuery = String.prototype.toQueryParams;
var Template = Class.create();
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
Template.prototype = {
initialize: function(template, pattern) {
this.template = template.toString();
this.pattern = pattern || Template.Pattern;
},
evaluate: function(object) {
return this.template.gsub(this.pattern, function(match) {
var before = match[1];
if (before == '\\') return match[2];
return before + String.interpret(object[match[3]]);
});
}
}
var $break = new Object();
var $continue = new Object();
var Enumerable = {
each: function(iterator) {
var index = 0;
try {
this._each(function(value) {
try {
iterator(value, index++);
} catch (e) {
if (e != $continue) throw e;
}
});
} catch (e) {
if (e != $break) throw e;
}
return this;
},
eachSlice: function(number, iterator) {
var index = -number, slices = [], array = this.toArray();
while ((index += number) < array.length)
slices.push(array.slice(index, index+number));
return slices.map(iterator);
},
all: function(iterator) {
var result = true;
this.each(function(value, index) {
result = result && !!(iterator || Prototype.K)(value, index);
if (!result) throw $break;
});
return result;
},
any: function(iterator) {
var result = false;
this.each(function(value, index) {
if (result = !!(iterator || Prototype.K)(value, index))
throw $break;
});
return result;
},
collect: function(iterator) {
var results = [];
this.each(function(value, index) {
results.push((iterator || Prototype.K)(value, index));
});
return results;
},
detect: function(iterator) {
var result;
this.each(function(value, index) {
if (iterator(value, index)) {
result = value;
throw $break;
}
});
return result;
},
findAll: function(iterator) {
var results = [];
this.each(function(value, index) {
if (iterator(value, index))
results.push(value);
});
return results;
},
grep: function(pattern, iterator) {
var results = [];
this.each(function(value, index) {
var stringValue = value.toString();
if (stringValue.match(pattern))
results.push((iterator || Prototype.K)(value, index));
})
return results;
},
include: function(object) {
var found = false;
this.each(function(value) {
if (value == object) {
found = true;
throw $break;
}
});
return found;
},
inGroupsOf: function(number, fillWith) {
fillWith = fillWith === undefined ? null : fillWith;
return this.eachSlice(number, function(slice) {
while(slice.length < number) slice.push(fillWith);
return slice;
});
},
inject: function(memo, iterator) {
this.each(function(value, index) {
memo = iterator(memo, value, index);
});
return memo;
},
invoke: function(method) {
var args = $A(arguments).slice(1);
return this.map(function(value) {
return value[method].apply(value, args);
});
},
max: function(iterator) {
var result;
this.each(function(value, index) {
value = (iterator || Prototype.K)(value, index);
if (result == undefined || value >= result)
result = value;
});
return result;
},
min: function(iterator) {
var result;
this.each(function(value, index) {
value = (iterator || Prototype.K)(value, index);
if (result == undefined || value < result)
result = value;
});
return result;
},
partition: function(iterator) {
var trues = [], falses = [];
this.each(function(value, index) {
((iterator || Prototype.K)(value, index) ?
trues : falses).push(value);
});
return [trues, falses];
},
pluck: function(property) {
var results = [];
this.each(function(value, index) {
results.push(value[property]);
});
return results;
},
reject: function(iterator) {
var results = [];
this.each(function(value, index) {
if (!iterator(value, index))
results.push(value);
});
return results;
},
sortBy: function(iterator) {
return this.map(function(value, index) {
return {value: value, criteria: iterator(value, index)};
}).sort(function(left, right) {
var a = left.criteria, b = right.criteria;
return a < b ? -1 : a > b ? 1 : 0;
}).pluck('value');
},
toArray: function() {
return this.map();
},
zip: function() {
var iterator = Prototype.K, args = $A(arguments);
if (typeof args.last() == 'function')
iterator = args.pop();
var collections = [this].concat(args).map($A);
return this.map(function(value, index) {
return iterator(collections.pluck(index));
});
},
size: function() {
return this.toArray().length;
},
inspect: function() {
return '#<Enumerable:' + this.toArray().inspect() + '>';
}
}
Object.extend(Enumerable, {
map: Enumerable.collect,
find: Enumerable.detect,
select: Enumerable.findAll,
member: Enumerable.include,
entries: Enumerable.toArray
});
var $A = Array.from = function(iterable) {
if (!iterable) return [];
if (iterable.toArray) {
return iterable.toArray();
} else {
var results = [];
for (var i = 0, length = iterable.length; i < length; i++)
results.push(iterable[i]);
return results;
}
}
Object.extend(Array.prototype, Enumerable);
if (!Array.prototype._reverse)
Array.prototype._reverse = Array.prototype.reverse;
Object.extend(Array.prototype, {
_each: function(iterator) {
for (var i = 0, length = this.length; i < length; i++)
iterator(this[i]);
},
clear: function() {
this.length = 0;
return this;
},
first: function() {
return this[0];
},
last: function() {
return this[this.length - 1];
},
compact: function() {
return this.select(function(value) {
return value != null;
});
},
flatten: function() {
return this.inject([], function(array, value) {
return array.concat(value && value.constructor == Array ?
value.flatten() : [value]);
});
},
without: function() {
var values = $A(arguments);
return this.select(function(value) {
return !values.include(value);
});
},
indexOf: function(object) {
for (var i = 0, length = this.length; i < length; i++)
if (this[i] == object) return i;
return -1;
},
reverse: function(inline) {
return (inline !== false ? this : this.toArray())._reverse();
},
reduce: function() {
return this.length > 1 ? this : this[0];
},
uniq: function() {
return this.inject([], function(array, value) {
return array.include(value) ? array : array.concat([value]);
});
},
clone: function() {
return [].concat(this);
},
size: function() {
return this.length;
},
inspect: function() {
return '[' + this.map(Object.inspect).join(', ') + ']';
}
});
Array.prototype.toArray = Array.prototype.clone;
function $w(string){
string = string.strip();
return string ? string.split(/\s+/) : [];
}
if(window.opera){
Array.prototype.concat = function(){
var array = [];
for(var i = 0, length = this.length; i < length; i++) array.push(this[i]);
for(var i = 0, length = arguments.length; i < length; i++) {
if(arguments[i].constructor == Array) {
for(var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
array.push(arguments[i][j]);
} else {
array.push(arguments[i]);
}
}
return array;
}
}
var Hash = function(obj) {
Object.extend(this, obj || {});
};
Object.extend(Hash, {
toQueryString: function(obj) {
var parts = [];
this.prototype._each.call(obj, function(pair) {
if (!pair.key) return;
if (pair.value && pair.value.constructor == Array) {
var values = pair.value.compact();
if (values.length < 2) pair.value = values.reduce();
else {
key = encodeURIComponent(pair.key);
values.each(function(value) {
value = value != undefined ? encodeURIComponent(value) : '';
parts.push(key + '=' + encodeURIComponent(value));
});
return;
}
}
if (pair.value == undefined) pair[1] = '';
parts.push(pair.map(encodeURIComponent).join('='));
});
return parts.join('&');
}
});
Object.extend(Hash.prototype, Enumerable);
Object.extend(Hash.prototype, {
_each: function(iterator) {
for (var key in this) {
var value = this[key];
if (value && value == Hash.prototype[key]) continue;
var pair = [key, value];
pair.key = key;
pair.value = value;
iterator(pair);
}
},
keys: function() {
return this.pluck('key');
},
values: function() {
return this.pluck('value');
},
merge: function(hash) {
return $H(hash).inject(this, function(mergedHash, pair) {
mergedHash[pair.key] = pair.value;
return mergedHash;
});
},
remove: function() {
var result;
for(var i = 0, length = arguments.length; i < length; i++) {
var value = this[arguments[i]];
if (value !== undefined){
if (result === undefined) result = value;
else {
if (result.constructor != Array) result = [result];
result.push(value)
}
}
delete this[arguments[i]];
}
return result;
},
toQueryString: function() {
return Hash.toQueryString(this);
},
inspect: function() {
return '#<Hash:{' + this.map(function(pair) {
return pair.map(Object.inspect).join(': ');
}).join(', ') + '}>';
}
});
function $H(object) {
if (object && object.constructor == Hash) return object;
return new Hash(object);
};
ObjectRange = Class.create();
Object.extend(ObjectRange.prototype, Enumerable);
Object.extend(ObjectRange.prototype, {
initialize: function(start, end, exclusive) {
this.start = start;
this.end = end;
this.exclusive = exclusive;
},
_each: function(iterator) {
var value = this.start;
while (this.include(value)) {
iterator(value);
value = value.succ();
}
},
include: function(value) {
if (value < this.start)
return false;
if (this.exclusive)
return value < this.end;
return value <= this.end;
}
});
var $R = function(start, end, exclusive) {
return new ObjectRange(start, end, exclusive);
}
var Ajax = {
getTransport: function() {
return Try.these(
function() {return new XMLHttpRequest()},
function() {return new ActiveXObject('Msxml2.XMLHTTP')},
function() {return new ActiveXObject('Microsoft.XMLHTTP')}
) || false;
},
activeRequestCount: 0
}
Ajax.Responders = {
responders: [],
_each: function(iterator) {
this.responders._each(iterator);
},
register: function(responder) {
if (!this.include(responder))
this.responders.push(responder);
},
unregister: function(responder) {
this.responders = this.responders.without(responder);
},
dispatch: function(callback, request, transport, json) {
this.each(function(responder) {
if (typeof responder[callback] == 'function') {
try {
responder[callback].apply(responder, [request, transport, json]);
} catch (e) {}
}
});
}
};
Object.extend(Ajax.Responders, Enumerable);
Ajax.Responders.register({
onCreate: function() {
Ajax.activeRequestCount++;
},
onComplete: function() {
Ajax.activeRequestCount--;
}
});
Ajax.Base = function() {};
Ajax.Base.prototype = {
setOptions: function(options) {
this.options = {
method: 'post',
asynchronous: true,
contentType: 'application/x-www-form-urlencoded',
encoding: 'UTF-8',
parameters: ''
}
Object.extend(this.options, options || {});
this.options.method = this.options.method.toLowerCase();
if (typeof this.options.parameters == 'string')
this.options.parameters = this.options.parameters.toQueryParams();
}
}
Ajax.Request = Class.create();
Ajax.Request.Events =
['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
Ajax.Request.prototype = Object.extend(new Ajax.Base(), {
_complete: false,
initialize: function(url, options) {
this.transport = Ajax.getTransport();
this.setOptions(options);
this.request(url);
},
request: function(url) {
this.url = url;
this.method = this.options.method;
var params = this.options.parameters;
if (!['get', 'post'].include(this.method)) {
// simulate other verbs over post
params['_method'] = this.method;
this.method = 'post';
}
params = Hash.toQueryString(params);
if (params && /Konqueror|Safari|KHTML/.test(navigator.userAgent)) params += '&_='
// when GET, append parameters to URL
if (this.method == 'get' && params)
this.url += (this.url.indexOf('?') > -1 ? '&' : '?') + params;
try {
Ajax.Responders.dispatch('onCreate', this, this.transport);
this.transport.open(this.method.toUpperCase(), this.url,
this.options.asynchronous);
if (this.options.asynchronous)
setTimeout(function() { this.respondToReadyState(1) }.bind(this), 10);
this.transport.onreadystatechange = this.onStateChange.bind(this);
this.setRequestHeaders();
var body = this.method == 'post' ? (this.options.postBody || params) : null;
this.transport.send(body);
/* Force Firefox to handle ready state 4 for synchronous requests */
if (!this.options.asynchronous && this.transport.overrideMimeType)
this.onStateChange();
}
catch (e) {
this.dispatchException(e);
}
},
onStateChange: function() {
var readyState = this.transport.readyState;
if (readyState > 1 && !((readyState == 4) && this._complete))
this.respondToReadyState(this.transport.readyState);
},
setRequestHeaders: function() {
var headers = {
'X-Requested-With': 'XMLHttpRequest',
'X-Prototype-Version': Prototype.Version,
'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
};
if (this.method == 'post') {
headers['Content-type'] = this.options.contentType +
(this.options.encoding ? '; charset=' + this.options.encoding : '');
/* Force "Connection: close" for older Mozilla browsers to work
* around a bug where XMLHttpRequest sends an incorrect
* Content-length header. See Mozilla Bugzilla #246651.
*/
if (this.transport.overrideMimeType &&
(navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
headers['Connection'] = 'close';
}
// user-defined headers
if (typeof this.options.requestHeaders == 'object') {
var extras = this.options.requestHeaders;
if (typeof extras.push == 'function')
for (var i = 0, length = extras.length; i < length; i += 2)
headers[extras[i]] = extras[i+1];
else
$H(extras).each(function(pair) { headers[pair.key] = pair.value });
}
for (var name in headers)
this.transport.setRequestHeader(name, headers[name]);
},
success: function() {
return !this.transport.status
|| (this.transport.status >= 200 && this.transport.status < 300);
},
respondToReadyState: function(readyState) {
var state = Ajax.Request.Events[readyState];
var transport = this.transport, json = this.evalJSON();
if (state == 'Complete') {
try {
this._complete = true;
(this.options['on' + this.transport.status]
|| this.options['on' + (this.success() ? 'Success' : 'Failure')]
|| Prototype.emptyFunction)(transport, json);
} catch (e) {
this.dispatchException(e);
}
if ((this.getHeader('Content-type') || 'text/javascript').strip().
match(/^(text|application)\/(x-)?(java|ecma)script(;.*)?$/i))
this.evalResponse();
}
try {
(this.options['on' + state] || Prototype.emptyFunction)(transport, json);
Ajax.Responders.dispatch('on' + state, this, transport, json);
} catch (e) {
this.dispatchException(e);
}
if (state == 'Complete') {
// avoid memory leak in MSIE: clean up
this.transport.onreadystatechange = Prototype.emptyFunction;
}
},
getHeader: function(name) {
try {
return this.transport.getResponseHeader(name);
} catch (e) { return null }
},
evalJSON: function() {
try {
var json = this.getHeader('X-JSON');
return json ? eval('(' + json + ')') : null;
} catch (e) { return null }
},
evalResponse: function() {
try {
return eval(this.transport.responseText);
} catch (e) {
this.dispatchException(e);
}
},
dispatchException: function(exception) {
(this.options.onException || Prototype.emptyFunction)(this, exception);
Ajax.Responders.dispatch('onException', this, exception);
}
});
Ajax.Updater = Class.create();
Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {
initialize: function(container, url, options) {
this.container = {
success: (container.success || container),
failure: (container.failure || (container.success ? null : container))
}
this.transport = Ajax.getTransport();
this.setOptions(options);
var onComplete = this.options.onComplete || Prototype.emptyFunction;
this.options.onComplete = (function(transport, param) {
this.updateContent();
onComplete(transport, param);
}).bind(this);
this.request(url);
},
updateContent: function() {
var receiver = this.container[this.success() ? 'success' : 'failure'];
var response = this.transport.responseText;
if (!this.options.evalScripts) response = response.stripScripts();
if (receiver = $(receiver)) {
if (this.options.insertion)
new this.options.insertion(receiver, response);
else
receiver.update(response);
}
if (this.success()) {
if (this.onComplete)
setTimeout(this.onComplete.bind(this), 10);
}
}
});
Ajax.PeriodicalUpdater = Class.create();
Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), {
initialize: function(container, url, options) {
this.setOptions(options);
this.onComplete = this.options.onComplete;
this.frequency = (this.options.frequency || 2);
this.decay = (this.options.decay || 1);
this.updater = {};
this.container = container;
this.url = url;
this.start();
},
start: function() {
this.options.onComplete = this.updateComplete.bind(this);
this.onTimerEvent();
},
stop: function() {
this.updater.options.onComplete = undefined;
clearTimeout(this.timer);
(this.onComplete || Prototype.emptyFunction).apply(this, arguments);
},
updateComplete: function(request) {
if (this.options.decay) {
this.decay = (request.responseText == this.lastText ?
this.decay * this.options.decay : 1);
this.lastText = request.responseText;
}
this.timer = setTimeout(this.onTimerEvent.bind(this),
this.decay * this.frequency * 1000);
},
onTimerEvent: function() {
this.updater = new Ajax.Updater(this.container, this.url, this.options);
}
});
function $(element) {
if (arguments.length > 1) {
for (var i = 0, elements = [], length = arguments.length; i < length; i++)
elements.push($(arguments[i]));
return elements;
}
if (typeof element == 'string')
element = document.getElementById(element);
return Element.extend(element);
}
if (Prototype.BrowserFeatures.XPath) {
document._getElementsByXPath = function(expression, parentElement) {
var results = [];
var query = document.evaluate(expression, $(parentElement) || document,
null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
for (var i = 0, length = query.snapshotLength; i < length; i++)
results.push(query.snapshotItem(i));
return results;
};
}
document.getElementsByClassName = function(className, parentElement) {
if (Prototype.BrowserFeatures.XPath) {
var q = ".//*[contains(concat(' ', @class, ' '), ' " + className + " ')]";
return document._getElementsByXPath(q, parentElement);
} else {
var children = ($(parentElement) || document.body).getElementsByTagName('*');
var elements = [], child;
for (var i = 0, length = children.length; i < length; i++) {
child = children[i];
if (Element.hasClassName(child, className))
elements.push(Element.extend(child));
}
return elements;
}
};
/*--------------------------------------------------------------------------*/
if (!window.Element)
var Element = new Object();
Element.extend = function(element) {
if (!element || _nativeExtensions || element.nodeType == 3) return element;
if (!element._extended && element.tagName && element != window) {
var methods = Object.clone(Element.Methods), cache = Element.extend.cache;
if (element.tagName == 'FORM')
Object.extend(methods, Form.Methods);
if (['INPUT', 'TEXTAREA', 'SELECT'].include(element.tagName))
Object.extend(methods, Form.Element.Methods);
Object.extend(methods, Element.Methods.Simulated);
for (var property in methods) {
var value = methods[property];
if (typeof value == 'function' && !(property in element))
element[property] = cache.findOrStore(value);
}
}
element._extended = true;
return element;
};
Element.extend.cache = {
findOrStore: function(value) {
return this[value] = this[value] || function() {
return value.apply(null, [this].concat($A(arguments)));
}
}
};
Element.Methods = {
visible: function(element) {
return $(element).style.display != 'none';
},
toggle: function(element) {
element = $(element);
Element[Element.visible(element) ? 'hide' : 'show'](element);
return element;
},
hide: function(element) {
$(element).style.display = 'none';
return element;
},
show: function(element) {
$(element).style.display = '';
return element;
},
remove: function(element) {
element = $(element);
element.parentNode.removeChild(element);
return element;
},
update: function(element, html) {
html = typeof html == 'undefined' ? '' : html.toString();
$(element).innerHTML = html.stripScripts();
setTimeout(function() {html.evalScripts()}, 10);
return element;
},
replace: function(element, html) {
element = $(element);
html = typeof html == 'undefined' ? '' : html.toString();
if (element.outerHTML) {
element.outerHTML = html.stripScripts();
} else {
var range = element.ownerDocument.createRange();
range.selectNodeContents(element);
element.parentNode.replaceChild(
range.createContextualFragment(html.stripScripts()), element);
}
setTimeout(function() {html.evalScripts()}, 10);
return element;
},
inspect: function(element) {
element = $(element);
var result = '<' + element.tagName.toLowerCase();
$H({'id': 'id', 'className': 'class'}).each(function(pair) {
var property = pair.first(), attribute = pair.last();
var value = (element[property] || '').toString();
if (value) result += ' ' + attribute + '=' + value.inspect(true);
});
return result + '>';
},
recursivelyCollect: function(element, property) {
element = $(element);
var elements = [];
while (element = element[property])
if (element.nodeType == 1)
elements.push(Element.extend(element));
return elements;
},
ancestors: function(element) {
return $(element).recursivelyCollect('parentNode');
},
descendants: function(element) {
return $A($(element).getElementsByTagName('*'));
},
immediateDescendants: function(element) {
if (!(element = $(element).firstChild)) return [];
while (element && element.nodeType != 1) element = element.nextSibling;
if (element) return [element].concat($(element).nextSiblings());
return [];
},
previousSiblings: function(element) {
return $(element).recursivelyCollect('previousSibling');
},
nextSiblings: function(element) {
return $(element).recursivelyCollect('nextSibling');
},
siblings: function(element) {
element = $(element);
return element.previousSiblings().reverse().concat(element.nextSiblings());
},
match: function(element, selector) {
if (typeof selector == 'string')
selector = new Selector(selector);
return selector.match($(element));
},
up: function(element, expression, index) {
return Selector.findElement($(element).ancestors(), expression, index);
},
down: function(element, expression, index) {
return Selector.findElement($(element).descendants(), expression, index);
},
previous: function(element, expression, index) {
return Selector.findElement($(element).previousSiblings(), expression, index);
},
next: function(element, expression, index) {
return Selector.findElement($(element).nextSiblings(), expression, index);
},
getElementsBySelector: function() {
var args = $A(arguments), element = $(args.shift());
return Selector.findChildElements(element, args);
},
getElementsByClassName: function(element, className) {
return document.getElementsByClassName(className, element);
},
readAttribute: function(element, name) {
element = $(element);
if (document.all && !window.opera) {
var t = Element._attributeTranslations;
if (t.values[name]) return t.values[name](element, name);
if (t.names[name]) name = t.names[name];
var attribute = element.attributes[name];
if(attribute) return attribute.nodeValue;
}
return element.getAttribute(name);
},
getHeight: function(element) {
return $(element).getDimensions().height;
},
getWidth: function(element) {
return $(element).getDimensions().width;
},
classNames: function(element) {
return new Element.ClassNames(element);
},
hasClassName: function(element, className) {
if (!(element = $(element))) return;
var elementClassName = element.className;
if (elementClassName.length == 0) return false;
if (elementClassName == className ||
elementClassName.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
return true;
return false;
},
addClassName: function(element, className) {
if (!(element = $(element))) return;
Element.classNames(element).add(className);
return element;
},
removeClassName: function(element, className) {
if (!(element = $(element))) return;
Element.classNames(element).remove(className);
return element;
},
toggleClassName: function(element, className) {
if (!(element = $(element))) return;
Element.classNames(element)[element.hasClassName(className) ? 'remove' : 'add'](className);
return element;
},
observe: function() {
Event.observe.apply(Event, arguments);
return $A(arguments).first();
},
stopObserving: function() {
Event.stopObserving.apply(Event, arguments);
return $A(arguments).first();
},
// removes whitespace-only text node children
cleanWhitespace: function(element) {
element = $(element);
var node = element.firstChild;
while (node) {
var nextNode = node.nextSibling;
if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
element.removeChild(node);
node = nextNode;
}
return element;
},
empty: function(element) {
return $(element).innerHTML.match(/^\s*$/);
},
descendantOf: function(element, ancestor) {
element = $(element), ancestor = $(ancestor);
while (element = element.parentNode)
if (element == ancestor) return true;
return false;
},
scrollTo: function(element) {
element = $(element);
var pos = Position.cumulativeOffset(element);
window.scrollTo(pos[0], pos[1]);
return element;
},
getStyle: function(element, style) {
element = $(element);
if (['float','cssFloat'].include(style))
style = (typeof element.style.styleFloat != 'undefined' ? 'styleFloat' : 'cssFloat');
style = style.camelize();
var value = element.style[style];
if (!value) {
if (document.defaultView && document.defaultView.getComputedStyle) {
var css = document.defaultView.getComputedStyle(element, null);
value = css ? css[style] : null;
} else if (element.currentStyle) {
value = element.currentStyle[style];
}
}
if((value == 'auto') && ['width','height'].include(style) && (element.getStyle('display') != 'none'))
value = element['offset'+style.capitalize()] + 'px';
if (window.opera && ['left', 'top', 'right', 'bottom'].include(style))
if (Element.getStyle(element, 'position') == 'static') value = 'auto';
if(style == 'opacity') {
if(value) return parseFloat(value);
if(value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
if(value[1]) return parseFloat(value[1]) / 100;
return 1.0;
}
return value == 'auto' ? null : value;
},
setStyle: function(element, style) {
element = $(element);
for (var name in style) {
var value = style[name];
if(name == 'opacity') {
if (value == 1) {
value = (/Gecko/.test(navigator.userAgent) &&
!/Konqueror|Safari|KHTML/.test(navigator.userAgent)) ? 0.999999 : 1.0;
if(/MSIE/.test(navigator.userAgent) && !window.opera)
element.style.filter = element.getStyle('filter').replace(/alpha\([^\)]*\)/gi,'');
} else if(value == '') {
if(/MSIE/.test(navigator.userAgent) && !window.opera)
element.style.filter = element.getStyle('filter').replace(/alpha\([^\)]*\)/gi,'');
} else {
if(value < 0.00001) value = 0;
if(/MSIE/.test(navigator.userAgent) && !window.opera)
element.style.filter = element.getStyle('filter').replace(/alpha\([^\)]*\)/gi,'') +
'alpha(opacity='+value*100+')';
}
} else if(['float','cssFloat'].include(name)) name = (typeof element.style.styleFloat != 'undefined') ? 'styleFloat' : 'cssFloat';
element.style[name.camelize()] = value;
}
return element;
},
getDimensions: function(element) {
element = $(element);
var display = $(element).getStyle('display');
if (display != 'none' && display != null) // Safari bug
return {width: element.offsetWidth, height: element.offsetHeight};
// All *Width and *Height properties give 0 on elements with display none,
// so enable the element temporarily
var els = element.style;
var originalVisibility = els.visibility;
var originalPosition = els.position;
var originalDisplay = els.display;
els.visibility = 'hidden';
els.position = 'absolute';
els.display = 'block';
var originalWidth = element.clientWidth;
var originalHeight = element.clientHeight;
els.display = originalDisplay;
els.position = originalPosition;
els.visibility = originalVisibility;
return {width: originalWidth, height: originalHeight};
},
makePositioned: function(element) {
element = $(element);
var pos = Element.getStyle(element, 'position');
if (pos == 'static' || !pos) {
element._madePositioned = true;
element.style.position = 'relative';
// Opera returns the offset relative to the positioning context, when an
// element is position relative but top and left have not been defined
if (window.opera) {
element.style.top = 0;
element.style.left = 0;
}
}
return element;
},
undoPositioned: function(element) {
element = $(element);
if (element._madePositioned) {
element._madePositioned = undefined;
element.style.position =
element.style.top =
element.style.left =
element.style.bottom =
element.style.right = '';
}
return element;
},
makeClipping: function(element) {
element = $(element);
if (element._overflow) return element;
element._overflow = element.style.overflow || 'auto';
if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden')
element.style.overflow = 'hidden';
return element;
},
undoClipping: function(element) {
element = $(element);
if (!element._overflow) return element;
element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
element._overflow = null;
return element;
}
};
Object.extend(Element.Methods, {childOf: Element.Methods.descendantOf});
Element._attributeTranslations = {};
Element._attributeTranslations.names = {
colspan: "colSpan",
rowspan: "rowSpan",
valign: "vAlign",
datetime: "dateTime",
accesskey: "accessKey",
tabindex: "tabIndex",
enctype: "encType",
maxlength: "maxLength",
readonly: "readOnly",
longdesc: "longDesc"
};
Element._attributeTranslations.values = {
_getAttr: function(element, attribute) {
return element.getAttribute(attribute, 2);
},
_flag: function(element, attribute) {
return $(element).hasAttribute(attribute) ? attribute : null;
},
style: function(element) {
return element.style.cssText.toLowerCase();
},
title: function(element) {
var node = element.getAttributeNode('title');
return node.specified ? node.nodeValue : null;
}
};
Object.extend(Element._attributeTranslations.values, {
href: Element._attributeTranslations.values._getAttr,
src: Element._attributeTranslations.values._getAttr,
disabled: Element._attributeTranslations.values._flag,
checked: Element._attributeTranslations.values._flag,
readonly: Element._attributeTranslations.values._flag,
multiple: Element._attributeTranslations.values._flag
});
Element.Methods.Simulated = {
hasAttribute: function(element, attribute) {
var t = Element._attributeTranslations;
attribute = t.names[attribute] || attribute;
return $(element).getAttributeNode(attribute).specified;
}
};
// IE is missing .innerHTML support for TABLE-related elements
if (document.all && !window.opera){
Element.Methods.update = function(element, html) {
element = $(element);
html = typeof html == 'undefined' ? '' : html.toString();
var tagName = element.tagName.toUpperCase();
if (['THEAD','TBODY','TR','TD'].include(tagName)) {
var div = document.createElement('div');
switch (tagName) {
case 'THEAD':
case 'TBODY':
div.innerHTML = '<table><tbody>' + html.stripScripts() + '</tbody></table>';
depth = 2;
break;
case 'TR':
div.innerHTML = '<table><tbody><tr>' + html.stripScripts() + '</tr></tbody></table>';
depth = 3;
break;
case 'TD':
div.innerHTML = '<table><tbody><tr><td>' + html.stripScripts() + '</td></tr></tbody></table>';
depth = 4;
}
$A(element.childNodes).each(function(node){
element.removeChild(node)
});
depth.times(function(){ div = div.firstChild });
$A(div.childNodes).each(
function(node){ element.appendChild(node) });
} else {
element.innerHTML = html.stripScripts();
}
setTimeout(function() {html.evalScripts()}, 10);
return element;
}
};
Object.extend(Element, Element.Methods);
var _nativeExtensions = false;
if(/Konqueror|Safari|KHTML/.test(navigator.userAgent))
['', 'Form', 'Input', 'TextArea', 'Select'].each(function(tag) {
var className = 'HTML' + tag + 'Element';
if(window[className]) return;
var klass = window[className] = {};
klass.prototype = document.createElement(tag ? tag.toLowerCase() : 'div').__proto__;
});
Element.addMethods = function(methods) {
Object.extend(Element.Methods, methods || {});
function copy(methods, destination, onlyIfAbsent) {
onlyIfAbsent = onlyIfAbsent || false;
var cache = Element.extend.cache;
for (var property in methods) {
var value = methods[property];
if (!onlyIfAbsent || !(property in destination))
destination[property] = cache.findOrStore(value);
}
}
if (typeof HTMLElement != 'undefined') {
copy(Element.Methods, HTMLElement.prototype);
copy(Element.Methods.Simulated, HTMLElement.prototype, true);
copy(Form.Methods, HTMLFormElement.prototype);
[HTMLInputElement, HTMLTextAreaElement, HTMLSelectElement].each(function(klass) {
copy(Form.Element.Methods, klass.prototype);
});
_nativeExtensions = true;
}
}
var Toggle = new Object();
Toggle.display = Element.toggle;
/*--------------------------------------------------------------------------*/
Abstract.Insertion = function(adjacency) {
this.adjacency = adjacency;
}
Abstract.Insertion.prototype = {
initialize: function(element, content) {
this.element = $(element);
this.content = content.stripScripts();
if (this.adjacency && this.element.insertAdjacentHTML) {
try {
this.element.insertAdjacentHTML(this.adjacency, this.content);
} catch (e) {
var tagName = this.element.tagName.toUpperCase();
if (['TBODY', 'TR'].include(tagName)) {
this.insertContent(this.contentFromAnonymousTable());
} else {
throw e;
}
}
} else {
this.range = this.element.ownerDocument.createRange();
if (this.initializeRange) this.initializeRange();
this.insertContent([this.range.createContextualFragment(this.content)]);
}
setTimeout(function() {content.evalScripts()}, 10);
},
contentFromAnonymousTable: function() {
var div = document.createElement('div');
div.innerHTML = '<table><tbody>' + this.content + '</tbody></table>';
return $A(div.childNodes[0].childNodes[0].childNodes);
}
}
var Insertion = new Object();
Insertion.Before = Class.create();
Insertion.Before.prototype = Object.extend(new Abstract.Insertion('beforeBegin'), {
initializeRange: function() {
this.range.setStartBefore(this.element);
},
insertContent: function(fragments) {
fragments.each((function(fragment) {
this.element.parentNode.insertBefore(fragment, this.element);
}).bind(this));
}
});
Insertion.Top = Class.create();
Insertion.Top.prototype = Object.extend(new Abstract.Insertion('afterBegin'), {
initializeRange: function() {
this.range.selectNodeContents(this.element);
this.range.collapse(true);
},
insertContent: function(fragments) {
fragments.reverse(false).each((function(fragment) {
this.element.insertBefore(fragment, this.element.firstChild);
}).bind(this));
}
});
Insertion.Bottom = Class.create();
Insertion.Bottom.prototype = Object.extend(new Abstract.Insertion('beforeEnd'), {
initializeRange: function() {
this.range.selectNodeContents(this.element);
this.range.collapse(this.element);
},
insertContent: function(fragments) {
fragments.each((function(fragment) {
this.element.appendChild(fragment);
}).bind(this));
}
});
Insertion.After = Class.create();
Insertion.After.prototype = Object.extend(new Abstract.Insertion('afterEnd'), {
initializeRange: function() {
this.range.setStartAfter(this.element);
},
insertContent: function(fragments) {
fragments.each((function(fragment) {
this.element.parentNode.insertBefore(fragment,
this.element.nextSibling);
}).bind(this));
}
});
/*--------------------------------------------------------------------------*/
Element.ClassNames = Class.create();
Element.ClassNames.prototype = {
initialize: function(element) {
this.element = $(element);
},
_each: function(iterator) {
this.element.className.split(/\s+/).select(function(name) {
return name.length > 0;
})._each(iterator);
},
set: function(className) {
this.element.className = className;
},
add: function(classNameToAdd) {
if (this.include(classNameToAdd)) return;
this.set($A(this).concat(classNameToAdd).join(' '));
},
remove: function(classNameToRemove) {
if (!this.include(classNameToRemove)) return;
this.set($A(this).without(classNameToRemove).join(' '));
},
toString: function() {
return $A(this).join(' ');
}
};
Object.extend(Element.ClassNames.prototype, Enumerable);
var Selector = Class.create();
Selector.prototype = {
initialize: function(expression) {
this.params = {classNames: []};
this.expression = expression.toString().strip();
this.parseExpression();
this.compileMatcher();
},
parseExpression: function() {
function abort(message) { throw 'Parse error in selector: ' + message; }
if (this.expression == '') abort('empty expression');
var params = this.params, expr = this.expression, match, modifier, clause, rest;
while (match = expr.match(/^(.*)\[([a-z0-9_:-]+?)(?:([~\|!]?=)(?:"([^"]*)"|([^\]\s]*)))?\]$/i)) {
params.attributes = params.attributes || [];
params.attributes.push({name: match[2], operator: match[3], value: match[4] || match[5] || ''});
expr = match[1];
}
if (expr == '*') return this.params.wildcard = true;
while (match = expr.match(/^([^a-z0-9_-])?([a-z0-9_-]+)(.*)/i)) {
modifier = match[1], clause = match[2], rest = match[3];
switch (modifier) {
case '#': params.id = clause; break;
case '.': params.classNames.push(clause); break;
case '':
case undefined: params.tagName = clause.toUpperCase(); break;
default: abort(expr.inspect());
}
expr = rest;
}
if (expr.length > 0) abort(expr.inspect());
},
buildMatchExpression: function() {
var params = this.params, conditions = [], clause;
if (params.wildcard)
conditions.push('true');
if (clause = params.id)
conditions.push('element.readAttribute("id") == ' + clause.inspect());
if (clause = params.tagName)
conditions.push('element.tagName.toUpperCase() == ' + clause.inspect());
if ((clause = params.classNames).length > 0)
for (var i = 0, length = clause.length; i < length; i++)
conditions.push('element.hasClassName(' + clause[i].inspect() + ')');
if (clause = params.attributes) {
clause.each(function(attribute) {
var value = 'element.readAttribute(' + attribute.name.inspect() + ')';
var splitValueBy = function(delimiter) {
return value + ' && ' + value + '.split(' + delimiter.inspect() + ')';
}
switch (attribute.operator) {
case '=': conditions.push(value + ' == ' + attribute.value.inspect()); break;
case '~=': conditions.push(splitValueBy(' ') + '.include(' + attribute.value.inspect() + ')'); break;
case '|=': conditions.push(
splitValueBy('-') + '.first().toUpperCase() == ' + attribute.value.toUpperCase().inspect()
); break;
case '!=': conditions.push(value + ' != ' + attribute.value.inspect()); break;
case '':
case undefined: conditions.push('element.hasAttribute(' + attribute.name.inspect() + ')'); break;
default: throw 'Unknown operator ' + attribute.operator + ' in selector';
}
});
}
return conditions.join(' && ');
},
compileMatcher: function() {
this.match = new Function('element', 'if (!element.tagName) return false; \
element = $(element); \
return ' + this.buildMatchExpression());
},
findElements: function(scope) {
var element;
if (element = $(this.params.id))
if (this.match(element))
if (!scope || Element.childOf(element, scope))
return [element];
scope = (scope || document).getElementsByTagName(this.params.tagName || '*');
var results = [];
for (var i = 0, length = scope.length; i < length; i++)
if (this.match(element = scope[i]))
results.push(Element.extend(element));
return results;
},
toString: function() {
return this.expression;
}
}
Object.extend(Selector, {
matchElements: function(elements, expression) {
var selector = new Selector(expression);
return elements.select(selector.match.bind(selector)).map(Element.extend);
},
findElement: function(elements, expression, index) {
if (typeof expression == 'number') index = expression, expression = false;
return Selector.matchElements(elements, expression || '*')[index || 0];
},
findChildElements: function(element, expressions) {
return expressions.map(function(expression) {
return expression.match(/[^\s"]+(?:"[^"]*"[^\s"]+)*/g).inject([null], function(results, expr) {
var selector = new Selector(expr);
return results.inject([], function(elements, result) {
return elements.concat(selector.findElements(result || element));
});
});
}).flatten();
}
});
function $$() {
return Selector.findChildElements(document, $A(arguments));
}
var Form = {
reset: function(form) {
$(form).reset();
return form;
},
serializeElements: function(elements, getHash) {
var data = elements.inject({}, function(result, element) {
if (!element.disabled && element.name) {
var key = element.name, value = $(element).getValue();
if (value != undefined) {
if (result[key]) {
if (result[key].constructor != Array) result[key] = [result[key]];
result[key].push(value);
}
else result[key] = value;
}
}
return result;
});
return getHash ? data : Hash.toQueryString(data);
}
};
Form.Methods = {
serialize: function(form, getHash) {
return Form.serializeElements(Form.getElements(form), getHash);
},
getElements: function(form) {
return $A($(form).getElementsByTagName('*')).inject([],
function(elements, child) {
if (Form.Element.Serializers[child.tagName.toLowerCase()])
elements.push(Element.extend(child));
return elements;
}
);
},
getInputs: function(form, typeName, name) {
form = $(form);
var inputs = form.getElementsByTagName('input');
if (!typeName && !name) return $A(inputs).map(Element.extend);
for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
var input = inputs[i];
if ((typeName && input.type != typeName) || (name && input.name != name))
continue;
matchingInputs.push(Element.extend(input));
}
return matchingInputs;
},
disable: function(form) {
form = $(form);
form.getElements().each(function(element) {
element.blur();
element.disabled = 'true';
});
return form;
},
enable: function(form) {
form = $(form);
form.getElements().each(function(element) {
element.disabled = '';
});
return form;
},
findFirstElement: function(form) {
return $(form).getElements().find(function(element) {
return element.type != 'hidden' && !element.disabled &&
['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
});
},
focusFirstElement: function(form) {
form = $(form);
form.findFirstElement().activate();
return form;
}
}
Object.extend(Form, Form.Methods);
/*--------------------------------------------------------------------------*/
Form.Element = {
focus: function(element) {
$(element).focus();
return element;
},
select: function(element) {
$(element).select();
return element;
}
}
Form.Element.Methods = {
serialize: function(element) {
element = $(element);
if (!element.disabled && element.name) {
var value = element.getValue();
if (value != undefined) {
var pair = {};
pair[element.name] = value;
return Hash.toQueryString(pair);
}
}
return '';
},
getValue: function(element) {
element = $(element);
var method = element.tagName.toLowerCase();
return Form.Element.Serializers[method](element);
},
clear: function(element) {
$(element).value = '';
return element;
},
present: function(element) {
return $(element).value != '';
},
activate: function(element) {
element = $(element);
element.focus();
if (element.select && ( element.tagName.toLowerCase() != 'input' ||
!['button', 'reset', 'submit'].include(element.type) ) )
element.select();
return element;
},
disable: function(element) {
element = $(element);
element.disabled = true;
return element;
},
enable: function(element) {
element = $(element);
element.blur();
element.disabled = false;
return element;
}
}
Object.extend(Form.Element, Form.Element.Methods);
var Field = Form.Element;
var $F = Form.Element.getValue;
/*--------------------------------------------------------------------------*/
Form.Element.Serializers = {
input: function(element) {
switch (element.type.toLowerCase()) {
case 'checkbox':
case 'radio':
return Form.Element.Serializers.inputSelector(element);
default:
return Form.Element.Serializers.textarea(element);
}
},
inputSelector: function(element) {
return element.checked ? element.value : null;
},
textarea: function(element) {
return element.value;
},
select: function(element) {
return this[element.type == 'select-one' ?
'selectOne' : 'selectMany'](element);
},
selectOne: function(element) {
var index = element.selectedIndex;
return index >= 0 ? this.optionValue(element.options[index]) : null;
},
selectMany: function(element) {
var values, length = element.length;
if (!length) return null;
for (var i = 0, values = []; i < length; i++) {
var opt = element.options[i];
if (opt.selected) values.push(this.optionValue(opt));
}
return values;
},
optionValue: function(opt) {
// extend element because hasAttribute may not be native
return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
}
}
/*--------------------------------------------------------------------------*/
Abstract.TimedObserver = function() {}
Abstract.TimedObserver.prototype = {
initialize: function(element, frequency, callback) {
this.frequency = frequency;
this.element = $(element);
this.callback = callback;
this.lastValue = this.getValue();
this.registerCallback();
},
registerCallback: function() {
setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
},
onTimerEvent: function() {
var value = this.getValue();
var changed = ('string' == typeof this.lastValue && 'string' == typeof value
? this.lastValue != value : String(this.lastValue) != String(value));
if (changed) {
this.callback(this.element, value);
this.lastValue = value;
}
}
}
Form.Element.Observer = Class.create();
Form.Element.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
getValue: function() {
return Form.Element.getValue(this.element);
}
});
Form.Observer = Class.create();
Form.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
getValue: function() {
return Form.serialize(this.element);
}
});
/*--------------------------------------------------------------------------*/
Abstract.EventObserver = function() {}
Abstract.EventObserver.prototype = {
initialize: function(element, callback) {
this.element = $(element);
this.callback = callback;
this.lastValue = this.getValue();
if (this.element.tagName.toLowerCase() == 'form')
this.registerFormCallbacks();
else
this.registerCallback(this.element);
},
onElementEvent: function() {
var value = this.getValue();
if (this.lastValue != value) {
this.callback(this.element, value);
this.lastValue = value;
}
},
registerFormCallbacks: function() {
Form.getElements(this.element).each(this.registerCallback.bind(this));
},
registerCallback: function(element) {
if (element.type) {
switch (element.type.toLowerCase()) {
case 'checkbox':
case 'radio':
Event.observe(element, 'click', this.onElementEvent.bind(this));
break;
default:
Event.observe(element, 'change', this.onElementEvent.bind(this));
break;
}
}
}
}
Form.Element.EventObserver = Class.create();
Form.Element.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
getValue: function() {
return Form.Element.getValue(this.element);
}
});
Form.EventObserver = Class.create();
Form.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
getValue: function() {
return Form.serialize(this.element);
}
});
if (!window.Event) {
var Event = new Object();
}
Object.extend(Event, {
KEY_BACKSPACE: 8,
KEY_TAB: 9,
KEY_RETURN: 13,
KEY_ESC: 27,
KEY_LEFT: 37,
KEY_UP: 38,
KEY_RIGHT: 39,
KEY_DOWN: 40,
KEY_DELETE: 46,
KEY_HOME: 36,
KEY_END: 35,
KEY_PAGEUP: 33,
KEY_PAGEDOWN: 34,
element: function(event) {
return event.target || event.srcElement;
},
isLeftClick: function(event) {
return (((event.which) && (event.which == 1)) ||
((event.button) && (event.button == 1)));
},
pointerX: function(event) {
return event.pageX || (event.clientX +
(document.documentElement.scrollLeft || document.body.scrollLeft));
},
pointerY: function(event) {
return event.pageY || (event.clientY +
(document.documentElement.scrollTop || document.body.scrollTop));
},
stop: function(event) {
if (event.preventDefault) {
event.preventDefault();
event.stopPropagation();
} else {
event.returnValue = false;
event.cancelBubble = true;
}
},
// find the first node with the given tagName, starting from the
// node the event was triggered on; traverses the DOM upwards
findElement: function(event, tagName) {
var element = Event.element(event);
while (element.parentNode && (!element.tagName ||
(element.tagName.toUpperCase() != tagName.toUpperCase())))
element = element.parentNode;
return element;
},
observers: false,
_observeAndCache: function(element, name, observer, useCapture) {
if (!this.observers) this.observers = [];
if (element.addEventListener) {
this.observers.push([element, name, observer, useCapture]);
element.addEventListener(name, observer, useCapture);
} else if (element.attachEvent) {
this.observers.push([element, name, observer, useCapture]);
element.attachEvent('on' + name, observer);
}
},
unloadCache: function() {
if (!Event.observers) return;
for (var i = 0, length = Event.observers.length; i < length; i++) {
Event.stopObserving.apply(this, Event.observers[i]);
Event.observers[i][0] = null;
}
Event.observers = false;
},
observe: function(element, name, observer, useCapture) {
element = $(element);
useCapture = useCapture || false;
if (name == 'keypress' &&
(navigator.appVersion.match(/Konqueror|Safari|KHTML/)
|| element.attachEvent))
name = 'keydown';
Event._observeAndCache(element, name, observer, useCapture);
},
stopObserving: function(element, name, observer, useCapture) {
element = $(element);
useCapture = useCapture || false;
if (name == 'keypress' &&
(navigator.appVersion.match(/Konqueror|Safari|KHTML/)
|| element.detachEvent))
name = 'keydown';
if (element.removeEventListener) {
element.removeEventListener(name, observer, useCapture);
} else if (element.detachEvent) {
try {
element.detachEvent('on' + name, observer);
} catch (e) {}
}
}
});
/* prevent memory leaks in IE */
if (navigator.appVersion.match(/\bMSIE\b/))
Event.observe(window, 'unload', Event.unloadCache, false);
var Position = {
// set to true if needed, warning: firefox performance problems
// NOT neeeded for page scrolling, only if draggable contained in
// scrollable elements
includeScrollOffsets: false,
// must be called before calling withinIncludingScrolloffset, every time the
// page is scrolled
prepare: function() {
this.deltaX = window.pageXOffset
|| document.documentElement.scrollLeft
|| document.body.scrollLeft
|| 0;
this.deltaY = window.pageYOffset
|| document.documentElement.scrollTop
|| document.body.scrollTop
|| 0;
},
realOffset: function(element) {
var valueT = 0, valueL = 0;
do {
valueT += element.scrollTop || 0;
valueL += element.scrollLeft || 0;
element = element.parentNode;
} while (element);
return [valueL, valueT];
},
cumulativeOffset: function(element) {
var valueT = 0, valueL = 0;
do {
valueT += element.offsetTop || 0;
valueL += element.offsetLeft || 0;
element = element.offsetParent;
} while (element);
return [valueL, valueT];
},
positionedOffset: function(element) {
var valueT = 0, valueL = 0;
do {
valueT += element.offsetTop || 0;
valueL += element.offsetLeft || 0;
element = element.offsetParent;
if (element) {
if(element.tagName=='BODY') break;
var p = Element.getStyle(element, 'position');
if (p == 'relative' || p == 'absolute') break;
}
} while (element);
return [valueL, valueT];
},
offsetParent: function(element) {
if (element.offsetParent) return element.offsetParent;
if (element == document.body) return element;
while ((element = element.parentNode) && element != document.body)
if (Element.getStyle(element, 'position') != 'static')
return element;
return document.body;
},
// caches x/y coordinate pair to use with overlap
within: function(element, x, y) {
if (this.includeScrollOffsets)
return this.withinIncludingScrolloffsets(element, x, y);
this.xcomp = x;
this.ycomp = y;
this.offset = this.cumulativeOffset(element);
return (y >= this.offset[1] &&
y < this.offset[1] + element.offsetHeight &&
x >= this.offset[0] &&
x < this.offset[0] + element.offsetWidth);
},
withinIncludingScrolloffsets: function(element, x, y) {
var offsetcache = this.realOffset(element);
this.xcomp = x + offsetcache[0] - this.deltaX;
this.ycomp = y + offsetcache[1] - this.deltaY;
this.offset = this.cumulativeOffset(element);
return (this.ycomp >= this.offset[1] &&
this.ycomp < this.offset[1] + element.offsetHeight &&
this.xcomp >= this.offset[0] &&
this.xcomp < this.offset[0] + element.offsetWidth);
},
// within must be called directly before
overlap: function(mode, element) {
if (!mode) return 0;
if (mode == 'vertical')
return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
element.offsetHeight;
if (mode == 'horizontal')
return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
element.offsetWidth;
},
page: function(forElement) {
var valueT = 0, valueL = 0;
var element = forElement;
do {
valueT += element.offsetTop || 0;
valueL += element.offsetLeft || 0;
// Safari fix
if (element.offsetParent==document.body)
if (Element.getStyle(element,'position')=='absolute') break;
} while (element = element.offsetParent);
element = forElement;
do {
if (!window.opera || element.tagName=='BODY') {
valueT -= element.scrollTop || 0;
valueL -= element.scrollLeft || 0;
}
} while (element = element.parentNode);
return [valueL, valueT];
},
clone: function(source, target) {
var options = Object.extend({
setLeft: true,
setTop: true,
setWidth: true,
setHeight: true,
offsetTop: 0,
offsetLeft: 0
}, arguments[2] || {})
// find page position of source
source = $(source);
var p = Position.page(source);
// find coordinate system to use
target = $(target);
var delta = [0, 0];
var parent = null;
// delta [0,0] will do fine with position: fixed elements,
// position:absolute needs offsetParent deltas
if (Element.getStyle(target,'position') == 'absolute') {
parent = Position.offsetParent(target);
delta = Position.page(parent);
}
// correct by body offsets (fixes Safari)
if (parent == document.body) {
delta[0] -= document.body.offsetLeft;
delta[1] -= document.body.offsetTop;
}
// set position
if(options.setLeft) target.style.left = (p[0] - delta[0] + options.offsetLeft) + 'px';
if(options.setTop) target.style.top = (p[1] - delta[1] + options.offsetTop) + 'px';
if(options.setWidth) target.style.width = source.offsetWidth + 'px';
if(options.setHeight) target.style.height = source.offsetHeight + 'px';
},
absolutize: function(element) {
element = $(element);
if (element.style.position == 'absolute') return;
Position.prepare();
var offsets = Position.positionedOffset(element);
var top = offsets[1];
var left = offsets[0];
var width = element.clientWidth;
var height = element.clientHeight;
element._originalLeft = left - parseFloat(element.style.left || 0);
element._originalTop = top - parseFloat(element.style.top || 0);
element._originalWidth = element.style.width;
element._originalHeight = element.style.height;
element.style.position = 'absolute';
element.style.top = top + 'px';
element.style.left = left + 'px';
element.style.width = width + 'px';
element.style.height = height + 'px';
},
relativize: function(element) {
element = $(element);
if (element.style.position == 'relative') return;
Position.prepare();
element.style.position = 'relative';
var top = parseFloat(element.style.top || 0) - (element._originalTop || 0);
var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);
element.style.top = top + 'px';
element.style.left = left + 'px';
element.style.height = element._originalHeight;
element.style.width = element._originalWidth;
}
}
// Safari returns margins on body which is incorrect if the child is absolutely
// positioned. For performance reasons, redefine Position.cumulativeOffset for
// KHTML/WebKit only.
if (/Konqueror|Safari|KHTML/.test(navigator.userAgent)) {
Position.cumulativeOffset = function(element) {
var valueT = 0, valueL = 0;
do {
valueT += element.offsetTop || 0;
valueL += element.offsetLeft || 0;
if (element.offsetParent == document.body)
if (Element.getStyle(element, 'position') == 'absolute') break;
element = element.offsetParent;
} while (element);
return [valueL, valueT];
}
}
Element.addMethods();
// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
// The rest of this file is the actual ray tracer written by Adam
// Burmister. It's a concatenation of the following files:
//
// flog/color.js
// flog/light.js
// flog/vector.js
// flog/ray.js
// flog/scene.js
// flog/material/basematerial.js
// flog/material/solid.js
// flog/material/chessboard.js
// flog/shape/baseshape.js
// flog/shape/sphere.js
// flog/shape/plane.js
// flog/intersectioninfo.js
// flog/camera.js
// flog/background.js
// flog/engine.js
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
Flog.RayTracer.Color = Class.create();
Flog.RayTracer.Color.prototype = {
red : 0.0,
green : 0.0,
blue : 0.0,
initialize : function(r, g, b) {
if(!r) r = 0.0;
if(!g) g = 0.0;
if(!b) b = 0.0;
this.red = r;
this.green = g;
this.blue = b;
},
add : function(c1, c2){
var result = new Flog.RayTracer.Color(0,0,0);
result.red = c1.red + c2.red;
result.green = c1.green + c2.green;
result.blue = c1.blue + c2.blue;
return result;
},
addScalar: function(c1, s){
var result = new Flog.RayTracer.Color(0,0,0);
result.red = c1.red + s;
result.green = c1.green + s;
result.blue = c1.blue + s;
result.limit();
return result;
},
subtract: function(c1, c2){
var result = new Flog.RayTracer.Color(0,0,0);
result.red = c1.red - c2.red;
result.green = c1.green - c2.green;
result.blue = c1.blue - c2.blue;
return result;
},
multiply : function(c1, c2) {
var result = new Flog.RayTracer.Color(0,0,0);
result.red = c1.red * c2.red;
result.green = c1.green * c2.green;
result.blue = c1.blue * c2.blue;
return result;
},
multiplyScalar : function(c1, f) {
var result = new Flog.RayTracer.Color(0,0,0);
result.red = c1.red * f;
result.green = c1.green * f;
result.blue = c1.blue * f;
return result;
},
divideFactor : function(c1, f) {
var result = new Flog.RayTracer.Color(0,0,0);
result.red = c1.red / f;
result.green = c1.green / f;
result.blue = c1.blue / f;
return result;
},
limit: function(){
this.red = (this.red > 0.0) ? ( (this.red > 1.0) ? 1.0 : this.red ) : 0.0;
this.green = (this.green > 0.0) ? ( (this.green > 1.0) ? 1.0 : this.green ) : 0.0;
this.blue = (this.blue > 0.0) ? ( (this.blue > 1.0) ? 1.0 : this.blue ) : 0.0;
},
distance : function(color) {
var d = Math.abs(this.red - color.red) + Math.abs(this.green - color.green) + Math.abs(this.blue - color.blue);
return d;
},
blend: function(c1, c2, w){
var result = new Flog.RayTracer.Color(0,0,0);
result = Flog.RayTracer.Color.prototype.add(
Flog.RayTracer.Color.prototype.multiplyScalar(c1, 1 - w),
Flog.RayTracer.Color.prototype.multiplyScalar(c2, w)
);
return result;
},
brightness : function() {
var r = Math.floor(this.red*255);
var g = Math.floor(this.green*255);
var b = Math.floor(this.blue*255);
return (r * 77 + g * 150 + b * 29) >> 8;
},
toString : function () {
var r = Math.floor(this.red*255);
var g = Math.floor(this.green*255);
var b = Math.floor(this.blue*255);
return "rgb("+ r +","+ g +","+ b +")";
}
}
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
Flog.RayTracer.Light = Class.create();
Flog.RayTracer.Light.prototype = {
position: null,
color: null,
intensity: 10.0,
initialize : function(pos, color, intensity) {
this.position = pos;
this.color = color;
this.intensity = (intensity ? intensity : 10.0);
},
getIntensity: function(distance){
if(distance >= intensity) return 0;
return Math.pow((intensity - distance) / strength, 0.2);
},
toString : function () {
return 'Light [' + this.position.x + ',' + this.position.y + ',' + this.position.z + ']';
}
}
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
Flog.RayTracer.Vector = Class.create();
Flog.RayTracer.Vector.prototype = {
x : 0.0,
y : 0.0,
z : 0.0,
initialize : function(x, y, z) {
this.x = (x ? x : 0);
this.y = (y ? y : 0);
this.z = (z ? z : 0);
},
copy: function(vector){
this.x = vector.x;
this.y = vector.y;
this.z = vector.z;
},
normalize : function() {
var m = this.magnitude();
return new Flog.RayTracer.Vector(this.x / m, this.y / m, this.z / m);
},
magnitude : function() {
return Math.sqrt((this.x * this.x) + (this.y * this.y) + (this.z * this.z));
},
cross : function(w) {
return new Flog.RayTracer.Vector(
-this.z * w.y + this.y * w.z,
this.z * w.x - this.x * w.z,
-this.y * w.x + this.x * w.y);
},
dot : function(w) {
return this.x * w.x + this.y * w.y + this.z * w.z;
},
add : function(v, w) {
return new Flog.RayTracer.Vector(w.x + v.x, w.y + v.y, w.z + v.z);
},
subtract : function(v, w) {
if(!w || !v) throw 'Vectors must be defined [' + v + ',' + w + ']';
return new Flog.RayTracer.Vector(v.x - w.x, v.y - w.y, v.z - w.z);
},
multiplyVector : function(v, w) {
return new Flog.RayTracer.Vector(v.x * w.x, v.y * w.y, v.z * w.z);
},
multiplyScalar : function(v, w) {
return new Flog.RayTracer.Vector(v.x * w, v.y * w, v.z * w);
},
toString : function () {
return 'Vector [' + this.x + ',' + this.y + ',' + this.z + ']';
}
}
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
Flog.RayTracer.Ray = Class.create();
Flog.RayTracer.Ray.prototype = {
position : null,
direction : null,
initialize : function(pos, dir) {
this.position = pos;
this.direction = dir;
},
toString : function () {
return 'Ray [' + this.position + ',' + this.direction + ']';
}
}
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
Flog.RayTracer.Scene = Class.create();
Flog.RayTracer.Scene.prototype = {
camera : null,
shapes : [],
lights : [],
background : null,
initialize : function() {
this.camera = new Flog.RayTracer.Camera(
new Flog.RayTracer.Vector(0,0,-5),
new Flog.RayTracer.Vector(0,0,1),
new Flog.RayTracer.Vector(0,1,0)
);
this.shapes = new Array();
this.lights = new Array();
this.background = new Flog.RayTracer.Background(new Flog.RayTracer.Color(0,0,0.5), 0.2);
}
}
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
if(typeof(Flog.RayTracer.Material) == 'undefined') Flog.RayTracer.Material = {};
Flog.RayTracer.Material.BaseMaterial = Class.create();
Flog.RayTracer.Material.BaseMaterial.prototype = {
gloss: 2.0, // [0...infinity] 0 = matt
transparency: 0.0, // 0=opaque
reflection: 0.0, // [0...infinity] 0 = no reflection
refraction: 0.50,
hasTexture: false,
initialize : function() {
},
getColor: function(u, v){
},
wrapUp: function(t){
t = t % 2.0;
if(t < -1) t += 2.0;
if(t >= 1) t -= 2.0;
return t;
},
toString : function () {
return 'Material [gloss=' + this.gloss + ', transparency=' + this.transparency + ', hasTexture=' + this.hasTexture +']';
}
}
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
Flog.RayTracer.Material.Solid = Class.create();
Flog.RayTracer.Material.Solid.prototype = Object.extend(
new Flog.RayTracer.Material.BaseMaterial(), {
initialize : function(color, reflection, refraction, transparency, gloss) {
this.color = color;
this.reflection = reflection;
this.transparency = transparency;
this.gloss = gloss;
this.hasTexture = false;
},
getColor: function(u, v){
return this.color;
},
toString : function () {
return 'SolidMaterial [gloss=' + this.gloss + ', transparency=' + this.transparency + ', hasTexture=' + this.hasTexture +']';
}
}
);
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
Flog.RayTracer.Material.Chessboard = Class.create();
Flog.RayTracer.Material.Chessboard.prototype = Object.extend(
new Flog.RayTracer.Material.BaseMaterial(), {
colorEven: null,
colorOdd: null,
density: 0.5,
initialize : function(colorEven, colorOdd, reflection, transparency, gloss, density) {
this.colorEven = colorEven;
this.colorOdd = colorOdd;
this.reflection = reflection;
this.transparency = transparency;
this.gloss = gloss;
this.density = density;
this.hasTexture = true;
},
getColor: function(u, v){
var t = this.wrapUp(u * this.density) * this.wrapUp(v * this.density);
if(t < 0.0)
return this.colorEven;
else
return this.colorOdd;
},
toString : function () {
return 'ChessMaterial [gloss=' + this.gloss + ', transparency=' + this.transparency + ', hasTexture=' + this.hasTexture +']';
}
}
);
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
if(typeof(Flog.RayTracer.Shape) == 'undefined') Flog.RayTracer.Shape = {};
Flog.RayTracer.Shape.BaseShape = Class.create();
Flog.RayTracer.Shape.BaseShape.prototype = {
position: null,
material: null,
initialize : function() {
this.position = new Vector(0,0,0);
this.material = new Flog.RayTracer.Material.SolidMaterial(
new Flog.RayTracer.Color(1,0,1),
0,
0,
0
);
},
toString : function () {
return 'Material [gloss=' + this.gloss + ', transparency=' + this.transparency + ', hasTexture=' + this.hasTexture +']';
}
}
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
if(typeof(Flog.RayTracer.Shape) == 'undefined') Flog.RayTracer.Shape = {};
Flog.RayTracer.Shape.Sphere = Class.create();
Flog.RayTracer.Shape.Sphere.prototype = {
initialize : function(pos, radius, material) {
this.radius = radius;
this.position = pos;
this.material = material;
},
intersect: function(ray){
var info = new Flog.RayTracer.IntersectionInfo();
info.shape = this;
var dst = Flog.RayTracer.Vector.prototype.subtract(ray.position, this.position);
var B = dst.dot(ray.direction);
var C = dst.dot(dst) - (this.radius * this.radius);
var D = (B * B) - C;
if(D > 0){ // intersection!
info.isHit = true;
info.distance = (-B) - Math.sqrt(D);
info.position = Flog.RayTracer.Vector.prototype.add(
ray.position,
Flog.RayTracer.Vector.prototype.multiplyScalar(
ray.direction,
info.distance
)
);
info.normal = Flog.RayTracer.Vector.prototype.subtract(
info.position,
this.position
).normalize();
info.color = this.material.getColor(0,0);
} else {
info.isHit = false;
}
return info;
},
toString : function () {
return 'Sphere [position=' + this.position + ', radius=' + this.radius + ']';
}
}
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
if(typeof(Flog.RayTracer.Shape) == 'undefined') Flog.RayTracer.Shape = {};
Flog.RayTracer.Shape.Plane = Class.create();
Flog.RayTracer.Shape.Plane.prototype = {
d: 0.0,
initialize : function(pos, d, material) {
this.position = pos;
this.d = d;
this.material = material;
},
intersect: function(ray){
var info = new Flog.RayTracer.IntersectionInfo();
var Vd = this.position.dot(ray.direction);
if(Vd == 0) return info; // no intersection
var t = -(this.position.dot(ray.position) + this.d) / Vd;
if(t <= 0) return info;
info.shape = this;
info.isHit = true;
info.position = Flog.RayTracer.Vector.prototype.add(
ray.position,
Flog.RayTracer.Vector.prototype.multiplyScalar(
ray.direction,
t
)
);
info.normal = this.position;
info.distance = t;
if(this.material.hasTexture){
var vU = new Flog.RayTracer.Vector(this.position.y, this.position.z, -this.position.x);
var vV = vU.cross(this.position);
var u = info.position.dot(vU);
var v = info.position.dot(vV);
info.color = this.material.getColor(u,v);
} else {
info.color = this.material.getColor(0,0);
}
return info;
},
toString : function () {
return 'Plane [' + this.position + ', d=' + this.d + ']';
}
}
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
Flog.RayTracer.IntersectionInfo = Class.create();
Flog.RayTracer.IntersectionInfo.prototype = {
isHit: false,
hitCount: 0,
shape: null,
position: null,
normal: null,
color: null,
distance: null,
initialize : function() {
this.color = new Flog.RayTracer.Color(0,0,0);
},
toString : function () {
return 'Intersection [' + this.position + ']';
}
}
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
Flog.RayTracer.Camera = Class.create();
Flog.RayTracer.Camera.prototype = {
position: null,
lookAt: null,
equator: null,
up: null,
screen: null,
initialize : function(pos, lookAt, up) {
this.position = pos;
this.lookAt = lookAt;
this.up = up;
this.equator = lookAt.normalize().cross(this.up);
this.screen = Flog.RayTracer.Vector.prototype.add(this.position, this.lookAt);
},
getRay: function(vx, vy){
var pos = Flog.RayTracer.Vector.prototype.subtract(
this.screen,
Flog.RayTracer.Vector.prototype.subtract(
Flog.RayTracer.Vector.prototype.multiplyScalar(this.equator, vx),
Flog.RayTracer.Vector.prototype.multiplyScalar(this.up, vy)
)
);
pos.y = pos.y * -1;
var dir = Flog.RayTracer.Vector.prototype.subtract(
pos,
this.position
);
var ray = new Flog.RayTracer.Ray(pos, dir.normalize());
return ray;
},
toString : function () {
return 'Ray []';
}
}
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
Flog.RayTracer.Background = Class.create();
Flog.RayTracer.Background.prototype = {
color : null,
ambience : 0.0,
initialize : function(color, ambience) {
this.color = color;
this.ambience = ambience;
}
}
/* Fake a Flog.* namespace */
if(typeof(Flog) == 'undefined') var Flog = {};
if(typeof(Flog.RayTracer) == 'undefined') Flog.RayTracer = {};
Flog.RayTracer.Engine = Class.create();
Flog.RayTracer.Engine.prototype = {
canvas: null, /* 2d context we can render to */
initialize: function(options){
this.options = Object.extend({
canvasHeight: 100,
canvasWidth: 100,
pixelWidth: 2,
pixelHeight: 2,
renderDiffuse: false,
renderShadows: false,
renderHighlights: false,
renderReflections: false,
rayDepth: 2
}, options || {});
this.options.canvasHeight /= this.options.pixelHeight;
this.options.canvasWidth /= this.options.pixelWidth;
/* TODO: dynamically include other scripts */
},
setPixel: function(x, y, color){
var pxW, pxH;
pxW = this.options.pixelWidth;
pxH = this.options.pixelHeight;
if (this.canvas) {
this.canvas.fillStyle = color.toString();
this.canvas.fillRect (x * pxW, y * pxH, pxW, pxH);
} else {
if (x === y) {
checkNumber += color.brightness();
}
// print(x * pxW, y * pxH, pxW, pxH);
}
},
renderScene: function(scene, canvas){
checkNumber = 0;
/* Get canvas */
if (canvas) {
this.canvas = canvas.getContext("2d");
} else {
this.canvas = null;
}
var canvasHeight = this.options.canvasHeight;
var canvasWidth = this.options.canvasWidth;
for(var y=0; y < canvasHeight; y++){
for(var x=0; x < canvasWidth; x++){
var yp = y * 1.0 / canvasHeight * 2 - 1;
var xp = x * 1.0 / canvasWidth * 2 - 1;
var ray = scene.camera.getRay(xp, yp);
var color = this.getPixelColor(ray, scene);
this.setPixel(x, y, color);
}
}
if (checkNumber !== 2321) {
throw new Error("Scene rendered incorrectly");
}
},
getPixelColor: function(ray, scene){
var info = this.testIntersection(ray, scene, null);
if(info.isHit){
var color = this.rayTrace(info, ray, scene, 0);
return color;
}
return scene.background.color;
},
testIntersection: function(ray, scene, exclude){
var hits = 0;
var best = new Flog.RayTracer.IntersectionInfo();
best.distance = 2000;
for(var i=0; i<scene.shapes.length; i++){
var shape = scene.shapes[i];
if(shape != exclude){
var info = shape.intersect(ray);
if(info.isHit && info.distance >= 0 && info.distance < best.distance){
best = info;
hits++;
}
}
}
best.hitCount = hits;
return best;
},
getReflectionRay: function(P,N,V){
var c1 = -N.dot(V);
var R1 = Flog.RayTracer.Vector.prototype.add(
Flog.RayTracer.Vector.prototype.multiplyScalar(N, 2*c1),
V
);
return new Flog.RayTracer.Ray(P, R1);
},
rayTrace: function(info, ray, scene, depth){
// Calc ambient
var color = Flog.RayTracer.Color.prototype.multiplyScalar(info.color, scene.background.ambience);
var oldColor = color;
var shininess = Math.pow(10, info.shape.material.gloss + 1);
for(var i=0; i<scene.lights.length; i++){
var light = scene.lights[i];
// Calc diffuse lighting
var v = Flog.RayTracer.Vector.prototype.subtract(
light.position,
info.position
).normalize();
if(this.options.renderDiffuse){
var L = v.dot(info.normal);
if(L > 0.0){
color = Flog.RayTracer.Color.prototype.add(
color,
Flog.RayTracer.Color.prototype.multiply(
info.color,
Flog.RayTracer.Color.prototype.multiplyScalar(
light.color,
L
)
)
);
}
}
// The greater the depth the more accurate the colours, but
// this is exponentially (!) expensive
if(depth <= this.options.rayDepth){
// calculate reflection ray
if(this.options.renderReflections && info.shape.material.reflection > 0)
{
var reflectionRay = this.getReflectionRay(info.position, info.normal, ray.direction);
var refl = this.testIntersection(reflectionRay, scene, info.shape);
if (refl.isHit && refl.distance > 0){
refl.color = this.rayTrace(refl, reflectionRay, scene, depth + 1);
} else {
refl.color = scene.background.color;
}
color = Flog.RayTracer.Color.prototype.blend(
color,
refl.color,
info.shape.material.reflection
);
}
// Refraction
/* TODO */
}
/* Render shadows and highlights */
var shadowInfo = new Flog.RayTracer.IntersectionInfo();
if(this.options.renderShadows){
var shadowRay = new Flog.RayTracer.Ray(info.position, v);
shadowInfo = this.testIntersection(shadowRay, scene, info.shape);
if(shadowInfo.isHit && shadowInfo.shape != info.shape /*&& shadowInfo.shape.type != 'PLANE'*/){
var vA = Flog.RayTracer.Color.prototype.multiplyScalar(color, 0.5);
var dB = (0.5 * Math.pow(shadowInfo.shape.material.transparency, 0.5));
color = Flog.RayTracer.Color.prototype.addScalar(vA,dB);
}
}
// Phong specular highlights
if(this.options.renderHighlights && !shadowInfo.isHit && info.shape.material.gloss > 0){
var Lv = Flog.RayTracer.Vector.prototype.subtract(
info.shape.position,
light.position
).normalize();
var E = Flog.RayTracer.Vector.prototype.subtract(
scene.camera.position,
info.shape.position
).normalize();
var H = Flog.RayTracer.Vector.prototype.subtract(
E,
Lv
).normalize();
var glossWeight = Math.pow(Math.max(info.normal.dot(H), 0), shininess);
color = Flog.RayTracer.Color.prototype.add(
Flog.RayTracer.Color.prototype.multiplyScalar(light.color, glossWeight),
color
);
}
}
color.limit();
return color;
}
};
function renderScene(){
var scene = new Flog.RayTracer.Scene();
scene.camera = new Flog.RayTracer.Camera(
new Flog.RayTracer.Vector(0, 0, -15),
new Flog.RayTracer.Vector(-0.2, 0, 5),
new Flog.RayTracer.Vector(0, 1, 0)
);
scene.background = new Flog.RayTracer.Background(
new Flog.RayTracer.Color(0.5, 0.5, 0.5),
0.4
);
var sphere = new Flog.RayTracer.Shape.Sphere(
new Flog.RayTracer.Vector(-1.5, 1.5, 2),
1.5,
new Flog.RayTracer.Material.Solid(
new Flog.RayTracer.Color(0,0.5,0.5),
0.3,
0.0,
0.0,
2.0
)
);
var sphere1 = new Flog.RayTracer.Shape.Sphere(
new Flog.RayTracer.Vector(1, 0.25, 1),
0.5,
new Flog.RayTracer.Material.Solid(
new Flog.RayTracer.Color(0.9,0.9,0.9),
0.1,
0.0,
0.0,
1.5
)
);
var plane = new Flog.RayTracer.Shape.Plane(
new Flog.RayTracer.Vector(0.1, 0.9, -0.5).normalize(),
1.2,
new Flog.RayTracer.Material.Chessboard(
new Flog.RayTracer.Color(1,1,1),
new Flog.RayTracer.Color(0,0,0),
0.2,
0.0,
1.0,
0.7
)
);
scene.shapes.push(plane);
scene.shapes.push(sphere);
scene.shapes.push(sphere1);
var light = new Flog.RayTracer.Light(
new Flog.RayTracer.Vector(5, 10, -1),
new Flog.RayTracer.Color(0.8, 0.8, 0.8)
);
var light1 = new Flog.RayTracer.Light(
new Flog.RayTracer.Vector(-3, 5, -15),
new Flog.RayTracer.Color(0.8, 0.8, 0.8),
100
);
scene.lights.push(light);
scene.lights.push(light1);
var imageWidth = 100; // $F('imageWidth');
var imageHeight = 100; // $F('imageHeight');
var pixelSize = "5,5".split(','); // $F('pixelSize').split(',');
var renderDiffuse = true; // $F('renderDiffuse');
var renderShadows = true; // $F('renderShadows');
var renderHighlights = true; // $F('renderHighlights');
var renderReflections = true; // $F('renderReflections');
var rayDepth = 2;//$F('rayDepth');
var raytracer = new Flog.RayTracer.Engine(
{
canvasWidth: imageWidth,
canvasHeight: imageHeight,
pixelWidth: pixelSize[0],
pixelHeight: pixelSize[1],
"renderDiffuse": renderDiffuse,
"renderHighlights": renderHighlights,
"renderShadows": renderShadows,
"renderReflections": renderReflections,
"rayDepth": rayDepth
}
);
raytracer.renderScene(scene, null, 0);
}
window.onload = function(){
startTest("v8-raytrace", '39e09d10');
test("RayTrace", renderScene);
endTest();
};
</script>
</body>
</html>
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