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<?php
header('Content-Type: text/html; charset=utf-8');
$p='overview';
if(isset($_GET['privacy'])){
$p='privacy';
}else if(isset($_GET['help'])){
$p='help';
}else if(isset($_GET['develop'])){
$p='develop';
}else if(isset($_GET['contact'])){
$p='contact';
}
function selected($n){
global $p;
if($n==$p){
echo ' class="selected"';
}
}
?><!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>graph.tk</title>
<link href="_about/main.css" type="text/css" rel="stylesheet" media="all">
<meta name="viewport" content="width=device-width; height=device-height; initial-scale=1.0; maximum-scale=1.0; user-scalable=false;"/>
<meta name="apple-mobile-web-app-capable" content="no" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link rel="icon" type="image/vnd.microsoft.icon" href="/favicon.ico" />
<meta name="description" content="graph.tk is an online and open-source graphing utillity. It runs in any modern browser that
supports the canvas element. It plots functions, and does it with style." />
</head>
<body>
<div class="all">
<div id="header">
<div class="left"><a href="/"><img src="_about/logo.png" /></a></div>
<div class="right"><a href="/"><img src="_about/shad.png" /></a></div>
</div>
</div>
<div id="bar">
<div class="all">
<div class="left"><a href="/">graph.tk</a></div>
<div class="right">
<p>graph.tk is an online and open-source graphing utillity. It runs in any modern browser that
supports the canvas element. It plots functions, and displays them with style.
</p>
<ul>
<a href="about"><li<?php selected('overview'); ?>>Overview</li></a>
<a href="?help"><li<?php selected('help'); ?>>Help</li></a>
<a href="http://graph.tk/video"><li<?php selected('video'); ?>>Video Demo</li></a>
<a href="?develop"><li<?php selected('develop'); ?>>Develop</li></a>
<a href="?contact"><li<?php selected('contact'); ?>>Contact</li></a>
</ul>
</div>
</div>
</div>
<div class="all" id="page">
<div class="left">Quick Links
<ul class="ql">
<li><a href="https://github.com/aantthony/graph.tk">Source on GitHub</a></li>
<li><a href="http://www.chromeexperiments.com/detail/graph-plotter/">Chromexperiments</a></li>
<li><a href="http://twitter.com/?status=Javascript graph app! http%3A%2F%2Fgraph.tk%2F">Share on Twitter</a></li>
<?php if($p=='overview') { ?><li><iframe src="http://www.facebook.com/plugins/like.php?href=http%3A%2F%2Fgraph.tk%2Fabout%2F&layout=button_count&show_faces=true&width=190&action=like&colorscheme=light&height=21" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:190px; height:21px;" allowTransparency="true"></iframe></li><?php } ?>
</ul>
</div>
<div class="right">
<?php
if($p=='overview'){
?>
<div class="gallery">
<div id="sc">
<img src="_about/pic1.png" /><img src="_about/pic2.png" /><img src="_about/pic3.png" /><img src="_about/pic4.png" /><img src="_about/pic5.png" /><img src="_about/pic6.png" /><img src="_about/pic7.png" /><img src="_about/pic8.png" />
</div>
</div>
<script type="text/javascript">
var sc=document.getElementById("sc");
var x=0;
var max=1650;
function z(){
sc.style.marginLeft=(-(-max/2*Math.cos(x++/1000)+max/2))+"px";
setTimeout(z,0);
}
z();
</script>
<h1>Overview</h1>
<p>
<ul>
<li>
<h3>Graphing</h3>
<p>Plot multiple functions on the dynamically resizing grid. Scroll to zoom, drag to move.</p>
</li>
<li>
<h3>Special functions</h3>
<p>It transforms your function into what the computer can calculate. Includes functions such as Γ(x),<br />ζ(x), x!, sinc(x),<br /> Σ[0,∞,n<sup>x</sup>/n!] ("sum"), and Π[1,5,n] ("product")</p>
</li>
<li>
<h3>LaTeX Rendering</h3>
<p>Uses <a href="http://laughinghan.github.com/mathquill/">MathQuill</a> for high quality math rendering.</p>
</li>
<li>
<h3>Integration</h3>
<p>Numerically integrate functions.<br />Solve <a href="http://en.wikipedia.org/wiki/Differential_equation" rel="external" title="Differential equations on Wikipedia">differential equations,</a> such as f'(x)=-x/f(x)</p>
</li>
<li>
<h3>HTML5</h3>
<p>No download required! Runs from within the browser using the new HTML5 Canvas element.<br />It also uses localStorage to save, and is an Offline Application which means you can use it when you're not even connected to the net!</p>
</li>
<li>
<h3>API</h3>
<p>Embed it in your own site or forum. <br /><a href="?develop">Use the API</a></p>
</li>
</ul>
</p>
<?php } else if($p=='help') { ?>
<h1>Help</h1>
<ul>
<li>
<h3>Basics</h3>
<p>Press the + to get examples of new functions. To type special characters, type "\" then their name, then press enter. To make a √, type "\sqrt". For "Σ" type "\sum" then press enter.</p>
</li>
<li>
<h3>Differentiation</h3>
<p>Example: Evaluate the deriviative y', when y = log(x). Graph "logx" in the first box. Then in another, type f′(x)</p>
</li>
<li>
<h3>Integration</h3>
<p>Example: Evaluate <span style="font-size:x-large">∫</span>x⋅e<sup>−x<sup>2</sup></sup> from 0 to ∞. Type x*e^-x^2 into the first box. Now click "Diff Eq" and type "g(x)" in the first differential box. Let x<sub>0</sub> = y<sub>0</sub> = 0. Click Solve. Integral should end at ½.</p>
</li>
</ul>
<ul>
<li>
<h3>Function list</h3>
<ul style="margin-left:1em">
<li>x!</li>
<li>x^2 (x<sup>2</sup>)</li>
<li>gamma(x)</li>
<li>g'[0](x) (derivative of g[0])</li>
<li>diff(0,2,x) (second derivative of g[0])</li>
<li>exp(x) (e<sup>x</sup>)</li>
<li>log(x) (natural log of x)</li>
<li>sum[3,5,n] (3+4+5)</li>
<li>product[3,5,n] (3*4*5)</li>
<li>fact(x) (same as x!)</li>
</ul>
</li>
<li>
<p>Help me make this graph app better by <a href="?contact">reporting bugs and giving feedback</a>, and <a href="http://twitter.com/?status=Javascript+graph+app!+http%3A%2F%2Fgraph.tk%2F" rel="external">tweeting.</a></p>
</li>
</ul>
<?php } else if($p=='contact') {
?><h1>Send a Message</h1>
<p>If you have any questions, bug reports, comments, suggestions, or even complaints, please leave a message. If you wish to be attributed for your ideas and suggestions then please say so.</p>
<form action="http://url3.tk/ajax.php" method="post" enctype="multipart/form-data">
<table style="width:100%;padding-right:90px;border:none">
<tr><td style="width:90px"><label for="cname">Your Name:</label></td><td><input name="cname" id="cname" type="text" value="" /></td></tr>
<tr><td><label for="cemail">Your Email:</label></td><td><input name="cemail" id="cemail" type="email" value="" /></td></tr>
<tr><td style="vertical-align:top;"><label for="cmsg">Message:</label></td><td style="vertical-align:top;"><textarea id="cmsg" name="cmsg" rows="13" style="resize:vertical"></textarea></td></tr>
<tr><td> </td><td><input type="hidden" name="a" value="msg" /><input name="sendbtn" type="submit" value="Send Message" /><span style="display:none"><input id="sbmj" style="display:none" type="button" onclick="this.disabled=true;this.value='Sending...';snd()" value="Send Message" /></span></td></tr>
</table>
</form>
<?php
}else if($p=='privacy') {
?><h1>Privacy and Terms</h1><h3>Disclaimer</h3>
<div style="text-align:justify">
<p>The content on this website is provided "as is" without warranty of any kind, express or implied, including but not limited to warranty of merchantability and fitness for a particular purpose. Should any content or data hosted on this website prove defective, you assume the cost of all necessary servicing, repear or correction.</p>
<p>In no event should the webmaster be held liable for damages, including but not limited to the loss or corruption of data, any damages, or failure of the website to operate. There is absolutely no guarantee for anything on this site at all. There is absolutely no guarantee for any websites or content linked to from this website. The content and data on this site is not gaurenteeed to be up to date, safe, reliable, or true.</p>
<p>If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the data or content hosted on this website.</p>
<h3>Copyright</h3>
<p>All content on this site is copyrighted © by me, unless otherwise specified. Visitors are not allowed to illegaly submit copyright material.</p>
<p>Ideas/Suggestions: by sending an idea or suggestion you acknowledge that you give all rights over that intellectual property to the website owner. If you wish to have a citation please tell me.</p>
<h3>Spam</h3>
<p>Spambots are not permitted to visit or use this site. This includes Http referer, comment, and email spam with the intention of gaining web traffic, advertising space, and/or just pure annoyance. Web crawlers are permitted.</p>
<h3>Privacy</h3>
<p>We use third-party advertising companies to serve ads when you visit our website. These companies may use information (not including your name, address, email address, or telephone number) about your visits to this and other websites in order to provide advertisements about goods and services of interest to you. If you would like more information about this practice and to know your choices about not having this information used by these companies, <a href="http://www.google.com/privacy_ads.html">click here</a>.</p>
<p>This website collects information about your visits, for purposes such as hit counters, security, and site and performance analysis. This data will rarely be used to identify you personally.</p>
<h3 style="text-align: center;">GNU GENERAL PUBLIC LICENSE</h3>
<p style="text-align: center;">Version 3, 29 June 2007</p>
<p>Copyright © 2007 Free Software Foundation, Inc.
<<a href="http://fsf.org/">http://fsf.org/</a>></p><p>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.</p>
<h3><a name="preamble"></a>Preamble</h3>
<p>The GNU General Public License is a free, copyleft license for
software and other kinds of works.</p>
<p>The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users. We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors. You can apply it to
your programs, too.</p>
<p>When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.</p>
<p>To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights. Therefore, you have
certain responsibilities if you distribute copies of the software, or if
you modify it: responsibilities to respect the freedom of others.</p>
<p>For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
freedoms that you received. You must make sure that they, too, receive
or can get the source code. And you must show them these terms so they
know their rights.</p>
<p>Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License
giving you legal permission to copy, distribute and/or modify it.</p>
<p>For the developers' and authors' protection, the GPL clearly explains
that there is no warranty for this free software. For both users' and
authors' sake, the GPL requires that modified versions be marked as
changed, so that their problems will not be attributed erroneously to
authors of previous versions.</p>
<p>Some devices are designed to deny users access to install or run
modified versions of the software inside them, although the manufacturer
can do so. This is fundamentally incompatible with the aim of
protecting users' freedom to change the software. The systematic
pattern of such abuse occurs in the area of products for individuals to
use, which is precisely where it is most unacceptable. Therefore, we
have designed this version of the GPL to prohibit the practice for those
products. If such problems arise substantially in other domains, we
stand ready to extend this provision to those domains in future versions
of the GPL, as needed to protect the freedom of users.</p>
<p>Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
software on general-purpose computers, but in those that do, we wish to
avoid the special danger that patents applied to a free program could
make it effectively proprietary. To prevent this, the GPL assures that
patents cannot be used to render the program non-free.</p>
<p>The precise terms and conditions for copying, distribution and
modification follow.</p>
<h3><a name="terms"></a>TERMS AND CONDITIONS</h3>
<h4><a name="section0"></a>0. Definitions.</h4>
<p>“This License” refers to version 3 of the GNU General Public License.</p>
<p>“Copyright” also means copyright-like laws that apply to other kinds of
works, such as semiconductor masks.</p>
<p>“The Program” refers to any copyrightable work licensed under this
License. Each licensee is addressed as “you”. “Licensees” and
“recipients” may be individuals or organizations.</p>
<p>To “modify” a work means to copy from or adapt all or part of the work
in a fashion requiring copyright permission, other than the making of an
exact copy. The resulting work is called a “modified version” of the
earlier work or a work “based on” the earlier work.</p>
<p>A “covered work” means either the unmodified Program or a work based
on the Program.</p>
<p>To “propagate” a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
infringement under applicable copyright law, except executing it on a
computer or modifying a private copy. Propagation includes copying,
distribution (with or without modification), making available to the
public, and in some countries other activities as well.</p>
<p>To “convey” a work means any kind of propagation that enables other
parties to make or receive copies. Mere interaction with a user through
a computer network, with no transfer of a copy, is not conveying.</p>
<p>An interactive user interface displays “Appropriate Legal Notices”
to the extent that it includes a convenient and prominently visible
feature that (1) displays an appropriate copyright notice, and (2)
tells the user that there is no warranty for the work (except to the
extent that warranties are provided), that licensees may convey the
work under this License, and how to view a copy of this License. If
the interface presents a list of user commands or options, such as a
menu, a prominent item in the list meets this criterion.</p>
<h4><a name="section1"></a>1. Source Code.</h4>
<p>The “source code” for a work means the preferred form of the work
for making modifications to it. “Object code” means any non-source
form of a work.</p>
<p>A “Standard Interface” means an interface that either is an official
standard defined by a recognized standards body, or, in the case of
interfaces specified for a particular programming language, one that
is widely used among developers working in that language.</p>
<p>The “System Libraries” of an executable work include anything, other
than the work as a whole, that (a) is included in the normal form of
packaging a Major Component, but which is not part of that Major
Component, and (b) serves only to enable use of the work with that
Major Component, or to implement a Standard Interface for which an
implementation is available to the public in source code form. A
“Major Component”, in this context, means a major essential component
(kernel, window system, and so on) of the specific operating system
(if any) on which the executable work runs, or a compiler used to
produce the work, or an object code interpreter used to run it.</p>
<p>The “Corresponding Source” for a work in object code form means all
the source code needed to generate, install, and (for an executable
work) run the object code and to modify the work, including scripts to
control those activities. However, it does not include the work's
System Libraries, or general-purpose tools or generally available free
programs which are used unmodified in performing those activities but
which are not part of the work. For example, Corresponding Source
includes interface definition files associated with source files for
the work, and the source code for shared libraries and dynamically
linked subprograms that the work is specifically designed to require,
such as by intimate data communication or control flow between those
subprograms and other parts of the work.</p>
<p>The Corresponding Source need not include anything that users
can regenerate automatically from other parts of the Corresponding
Source.</p>
<p>The Corresponding Source for a work in source code form is that
same work.</p>
<h4><a name="section2"></a>2. Basic Permissions.</h4>
<p>All rights granted under this License are granted for the term of
copyright on the Program, and are irrevocable provided the stated
conditions are met. This License explicitly affirms your unlimited
permission to run the unmodified Program. The output from running a
covered work is covered by this License only if the output, given its
content, constitutes a covered work. This License acknowledges your
rights of fair use or other equivalent, as provided by copyright law.</p>
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<h4><a name="section12"></a>12. No Surrender of Others' Freedom.</h4>
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<h4><a name="section15"></a>15. Disclaimer of Warranty.</h4>
<p>THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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<p>If the disclaimer of warranty and limitation of liability provided
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copy of the Program in return for a fee.</p>
</div><?php
} else if($p=='develop') { ?>
<h1>Contribute</h1>
<p>There are many bugs to be fixed, and some features awaiting implementation. If you can hack some javascript then please <a href="?contact">send me a message</a> or just fork <a href="https://github.com/aantthony/graph.tk">https://github.com/aantthony/graph.tk</a> on GitHub.
<h1><abbr title="Application Programming Interface">API</abbr></h1>
<div>
<h3>Simple Method</h3>
<p>Use the following code to generate a graph. You can also use /?f=sinx because /#?f can sometimes generate encoding errors. Note that "x y" will end up being "x+y".</p>
<code> <b><iframe</b> <i>src=</i><span class="u">"http://graph.tk/#y=sin(x)"</span><b>></iframe></b></code>
<div>
<iframe src="http://graph.tk/?y=sin(x)&r=228807965"></iframe>
</div>
</div>
<div>
<h3>Powerful Method</h3>
<p>Use the following code to generate a graph. You can also use /?f=sinx becaues /#?f can sometimes generate encoding errors. Note that "x y" will end up being "x+y".</p>
<code> <b><div</b> <i>id=</i><span class="u">"gview"</span><b>></div></b>(rest of page...)<br /><br /> <b><script</b> <i>src=</i><span class="u">"http://graph.tk/api.js"</span><b>></script></b><br /> <b><script></b>createGraph([<strong>"x!"</strong>,<strong>"2x^2"</strong>,<strong>"sin(x)"</strong>],<br />document.getElementById(<b>"gview"</b>));<b></script></body></html></b> </code>
<div>
<iframe src="http://graph.tk/?json=%7B%22status%22%3A%22ok%22%2C%22g%22%3A%5B%22x!%22%2C%222x%5E2%22%2C%22sin(x)%22%5D%7D&r=2041189797"></iframe>
</div>
</div>
<?php } ?>
</div>
<div id="footer">
<a style="float:right" href="http://www.gnu.org/licenses/gpl.html" target="_blank" rel="license">Relased under the GNU General Public License</a>
<a href="/">Graph.tk</a> | <a href="?privacy">Privacy</a> | <a href="https://github.com/aantthony/graph.tk">Source Code</a> | <a href="?contact">Contact</a>
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