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-<p>
-Next: <a href="Channels.html" accesskey="n" rel="next">Channels</a>, Previous: <a href="Scripts.html" accesskey="p" rel="prev">Scripts</a>, Up: <a href="Scripting.html" accesskey="u" rel="up">Scripting</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html" title="Index" rel="index">Index</a>]</p>
-</div>
-<hr />
-<span id="Tweening-1"></span><h4 class="subsection">5.5.3 Tweening</h4>
-
-<p>Tweening is the process of transitioning something from an initial
-state to a final state over a pre-determined period of time. In other
-words, tweening is a way to create animation. The <code>tween</code>
-procedure can be used within any script like so:
-</p>
-<div class="lisp">
-<pre class="lisp"><span class="syntax-open">(</span><span class="syntax-special">define</span> <span class="syntax-symbol">x</span> <span class="syntax-symbol">0</span><span class="syntax-close">)</span>
-<span class="syntax-open">(</span><span class="syntax-symbol">script</span>
- <span class="syntax-comment">;; 0 to 100 in 60 ticks of the agenda.
-</span> <span class="syntax-open">(</span><span class="syntax-symbol">tween</span> <span class="syntax-symbol">60</span> <span class="syntax-symbol">0</span> <span class="syntax-symbol">100</span> <span class="syntax-open">(</span><span class="syntax-special">lambda</span> <span class="syntax-open">(</span><span class="syntax-symbol">y</span><span class="syntax-close">)</span> <span class="syntax-open">(</span><span class="syntax-symbol">set!</span> <span class="syntax-symbol">x</span> <span class="syntax-symbol">y</span><span class="syntax-close">)</span><span class="syntax-close">)</span><span class="syntax-close">)</span><span class="syntax-close">)</span>
-</pre></div>
-
-<dl>
-<dt id="index-tween">Procedure: <strong>tween</strong> <em>duration start end proc [#:step <code>1</code>] [#:ease <code>smoothstep</code>] #:interpolate <code>lerp</code>]</em></dt>
-<dd><p>Transition a value from <var>start</var> to <var>end</var> over <var>duration</var>,
-sending each succesive value to <var>proc</var>. <var>step</var> controls the
-amount of time between each update of the animation.
-</p>
-<p>To control how the animation goes from the initial to final state, an
-&ldquo;easing&rdquo; procedure may be specified. By default, the
-<code>smoothstep</code> easing is used, which is a more pleasing default
-than a simplistic linear function. See <a href="Easings.html">Easings</a> for a complete list
-of available easing procedures.
-</p>
-<p>The <var>interpolate</var> procedure computes the values in between
-<var>start</var> and <var>end</var>. By default, linear interpolation (&ldquo;lerp&rdquo;
-for short) is used.
-</p></dd></dl>
-
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