Files
Landon Curt Noll a1c86c8a7a add original C links to entry navigation bars
The navigation bar for a winning entry now has a "_Original C_" link
(between the ✅ and the Inventory on the right hand side) so that one
may easily view the original C code that was submitted for IOCCC judging.

Ran `make www timestamp` to perform the above.
2025-08-10 12:46:23 -07:00

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<h1>The International Obfuscated C Code Contest</h1>
<h2>2004/schnitzi - Best non-use of curses</h2>
<h3>Editor animation</h3>
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<a class="Left" href="../omoikane/index.html">&larr; 2004/omoikane</a>
<a class="Left" href="../index.html">&uarr; 2004 &uarr;</a>
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<a class="Right" href="https://github.com/ioccc-src/winner/blob/master/2004/schnitzi/schnitzi.c">C code</a>
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<h2 id="author">Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Mark_Schnitzius">Mark Schnitzius</a><br>
Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)</li>
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<h2 id="to-build">To build:</h2>
<pre><code> make</code></pre>
<h2 id="to-use">To use:</h2>
<pre><code> ./schnitzi &lt;foo | vi -n</code></pre>
<p>where <code>foo</code> is a valid input file (see the <a href="#the-input">author’s input details</a>
for more details).</p>
<h2 id="try">Try:</h2>
<pre><code> ./try.sh</code></pre>
<p><strong>NOTE</strong>: if you’re one of those who don’t know how to exit <code>vi</code> :-) don’t worry
as it will exit for you.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>This exemplifies the meaning of Visual Editor, but we don’t think
that any benchmarking sites are going to use this to tout the
performance of the latest hardware!</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<p>If you’ve ever pasted a large chunk of text into an editor (such as
<code>vi</code>) without first putting it into insert mode, or turning off
the auto-indent, you know the dismay of watching your screen fill
up with misaligned junk.</p>
<p>It’s not the editor’s fault. The editor is just acting just as if
you typed exactly what you’re pasting. (Of course, you could blame
the editor for being modal in the first place, but that’s a
discussion for another time.)</p>
<p>It occurred to me that you could get interesting results by pasting
a carefully designed string into the editor. In fact, if the pasted
string contains cursor navigation commands, you can go back and
overwrite things that were already inserted earlier in string,
anywhere on the screen. Can you see where this is going?</p>
<h3 id="animation">ANIMATION!</h3>
<p>The program takes input from <code>stdin</code> which defines the animated
elements (sprites) that appear on the screen. For each sprite,
you can specify exactly when and how long it will appear, and which
direction it is moving. Also, the sprite can oscillate between
up to four different views, which appear in subsequent frames.
Forgive me, animators, if I’m mangling the terminology. Sprites
which appear later in the input file will be drawn in front of
sprites which appear earlier.</p>
<p>The output, written to <code>stdout</code>, is a string which, when pasted into vi, will
perform the animation defined in the input. (The vi editor is a common (and
ancient) editor that should be available on most Unix, Linux, Solaris, and macOS
systems; you can get it on Windows by installing Cygwin, which is how I do
it.)</p>
<h3 id="the-input">THE INPUT</h3>
<p>It’s easiest to place the input in a file, so you can redirect it
to <code>stdin</code> when running the program. What follows is a detailed
description of the input file format.</p>
<p>The first line is specified thusly:</p>
<pre><code> [duration] [timefactor]</code></pre>
<p>The first parameter, <code>duration</code>, defines how long the animation will run. The
second, <code>timefactor</code>, is used as sort of a fudge factor for machines that run
too fast to see the animation. A <code>timefactor</code> of 0 means, “run the animation as
fast as you can”. On a pretty fast machine, I’ve had to set it as high as 2000
to get the animation to slow down sufficiently. Note that the higher the
<code>timefactor</code>, the longer the output string that you’ll have to copy and paste,
as extra characters are necessary to “waste time” between frames.</p>
<p>Following the first line parameters, you may have up to nine
different sprites, each up 50 by 50 in size, and with up to four
different ‘views’ of that object, which are cycled through with
each successive frame. Each sprite begins with a line of parameters
of the following form:</p>
<pre><code> [start] [end] [x] [y] [dx] [dy] [cols] [rows] [viewcount]</code></pre>
<p>where:</p>
<ul>
<li><p><code>start</code> is the time at which this sprite first appears.</p></li>
<li><p><code>end</code> is the time at which it disappears.</p></li>
<li><p><code>x</code> is the horizontal position at which it starts.</p></li>
<li><p><code>y</code> is the vertical position.</p></li>
<li><p><code>dx</code> is the amount that the <code>x</code> position changes per frame.</p></li>
<li><p><code>dy</code> is the amount that the <code>y</code> position changes per frame.</p></li>
<li><p><code>cols</code> is the number of columns in each view.</p></li>
<li><p><code>rows</code> is the number of rows in each view.</p></li>
<li><p><code>viewcount</code> is the number of views to cycle through.</p></li>
</ul>
<p>Each such parameter line will be followed by <code>viewcount</code>
view frames, each with <code>rows</code> rows and <code>cols</code> columns.</p>
<p>Input is terminated by end of file. Duh.</p>
<p>Two samples input files are included; one a nice pastoral park
scene, the other a bit of scrolling text.</p>
<h3 id="running-the-animation">RUNNING THE ANIMATION</h3>
<p>Try one of these methods to get the animation to run:</p>
<ol type="1">
<li>Redirect the output directly to vi, like this:</li>
</ol>
<pre><code> ./schnitzi &lt; input.dat | vi</code></pre>
<ol start="2" type="1">
<li>Redirect the output to a file, like this:</li>
</ol>
<pre><code> ./schnitzi &lt; input.dat &gt; output.dat</code></pre>
<p>Then, open the output file, select the text, and copy it
to your system pasteboard/cut/selection buffer and paste
it into vi. The paste is NOT the vi paste command, but
rather an action you take within your operating system.
On a Windows machine running vi via Cygwin, “Edit|Paste”
is a right-click menu option on the top window bar.</p>
<ol start="3" type="1">
<li>Memorize the output, and type it into vi really really fast.</li>
</ol>
<h3 id="a-final-note">A FINAL NOTE</h3>
<p>I would like to remind the Pixar Animation Studios that I retain
royalties on this technique.</p>
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<h1 id="inventory-for-2004schnitzi">Inventory for 2004/schnitzi</h1>
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<h2 id="primary-files">Primary files</h2>
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