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make mathjax host a config option, revamp script loading, fragment examples #531

This commit is contained in:
Hakim El Hattab 2013-08-12 23:15:19 -04:00
parent 3901904057
commit 3e23b8b690
2 changed files with 109 additions and 20 deletions
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75
examples/math.html
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@ -93,6 +93,79 @@
\]
</section>
<section>
<section>
<h3>The Lorenz Equations</h3>
<div class="fragment">
\[\begin{aligned}
\dot{x} &amp; = \sigma(y-x) \\
\dot{y} &amp; = \rho x - y - xz \\
\dot{z} &amp; = -\beta z + xy
\end{aligned} \]
</div>
</section>
<section>
<h3>The Cauchy-Schwarz Inequality</h3>
<div class="fragment">
\[ \left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right) \]
</div>
</section>
<section>
<h3>A Cross Product Formula</h3>
<div class="fragment">
\[\mathbf{V}_1 \times \mathbf{V}_2 = \begin{vmatrix}
\mathbf{i} &amp; \mathbf{j} &amp; \mathbf{k} \\
\frac{\partial X}{\partial u} &amp; \frac{\partial Y}{\partial u} &amp; 0 \\
\frac{\partial X}{\partial v} &amp; \frac{\partial Y}{\partial v} &amp; 0
\end{vmatrix} \]
</div>
</section>
<section>
<h3>The probability of getting \(k\) heads when flipping \(n\) coins is</h3>
<div class="fragment">
\[P(E) = {n \choose k} p^k (1-p)^{ n-k} \]
</div>
</section>
<section>
<h3>An Identity of Ramanujan</h3>
<div class="fragment">
\[ \frac{1}{\Bigl(\sqrt{\phi \sqrt{5}}-\phi\Bigr) e^{\frac25 \pi}} =
1+\frac{e^{-2\pi}} {1+\frac{e^{-4\pi}} {1+\frac{e^{-6\pi}}
{1+\frac{e^{-8\pi}} {1+\ldots} } } } \]
</div>
</section>
<section>
<h3>A Rogers-Ramanujan Identity</h3>
<div class="fragment">
\[ 1 + \frac{q^2}{(1-q)}+\frac{q^6}{(1-q)(1-q^2)}+\cdots =
\prod_{j=0}^{\infty}\frac{1}{(1-q^{5j+2})(1-q^{5j+3})}\]
</div>
</section>
<section>
<h3>Maxwell&#8217;s Equations</h3>
<div class="fragment">
\[ \begin{aligned}
\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} &amp; = \frac{4\pi}{c}\vec{\mathbf{j}} \\ \nabla \cdot \vec{\mathbf{E}} &amp; = 4 \pi \rho \\
\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} &amp; = \vec{\mathbf{0}} \\
\nabla \cdot \vec{\mathbf{B}} &amp; = 0 \end{aligned}
\]
</div>
</section>
</section>
</div>
</div>
@ -103,9 +176,11 @@
<script>
Reveal.initialize({
history: true,
transition: 'linear',
math: {
// host: 'http://cdn.mathjax.org/mathjax/latest/MathJax.js',
mode: 'TeX-AMS_HTML-full'
},

54
plugin/math/math.js
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@ -9,27 +9,10 @@ var RevealMath = window.RevealMath || (function(){
var loaded = false;
var config = Reveal.getConfig().math || {};
config.host = config.host || 'http://cdn.mathjax.org/mathjax/latest/MathJax.js';
config.mode = config.mode || 'TeX-AMS_HTML-full';
var head = document.querySelector( 'head' );
var script = document.createElement( 'script' );
script.type = 'text/javascript';
script.src = 'http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=' + config.mode;
// Detect when the script has loaded
script.onload = onScriptLoad;
// IE
script.onreadystatechange = function() {
if ( this.readyState === 'loaded' ) {
onScriptLoad.call();
}
}
// Normal browsers
head.appendChild( script );
function onScriptLoad() {
loadScript( config.host + '?config=' + config.mode, function() {
// Conditioned just in case both onload and readystate fire
if( loaded === false ) {
@ -48,11 +31,42 @@ var RevealMath = window.RevealMath || (function(){
// This will only typeset equations that have not yet been
// processed, as well as equations that have change since
// last being processed.
MathJax.Hub.Update( event.currentSlide );
MathJax.Hub.Update( event.currentSlide, function() {
Reveal.layout();
} );
} );
}
} );
function loadScript( url, callback ) {
var head = document.querySelector( 'head' );
var script = document.createElement( 'script' );
script.type = 'text/javascript';
script.src = url;
// Wrapper for callback to make sure it only fires once
var finish = function() {
if( typeof callback === 'function' ) {
callback.call();
callback = null;
}
}
script.onload = finish;
// IE
script.onreadystatechange = function() {
if ( this.readyState === 'loaded' ) {
finish.call();
}
}
// Normal browsers
head.appendChild( script );
}
})();