Remove hint.html and index.html
As per discussions on GitHub the index.html and hint.html files should be deleted in favour of README.md files (from any .text/.txt/.markdown/.md files which will be turned into README.md in an upcoming commit).
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta name="GENERATOR" content="mkd2html 2.1.5a DL=DISCOUNT">
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<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">
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<link rel="stylesheet"
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type="text/css"
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href="../hint.css">
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<title>Smallest large system simulator</title>
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</head>
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<body>
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<h1>Smallest large system simulator</h1>
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<p>Yves-Marie Morgan<br>
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<a href="mailto:yves-marie.morgan@parrot.com">yves-marie.morgan@parrot.com</a></p>
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<h2>Judges' comments:</h2>
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<h3>To build:</h3>
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<pre><code>make morgan1
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</code></pre>
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<h3>To run:</h3>
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<pre><code>echo "2013/10/03" | ./morgan1
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</code></pre>
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<h3>Try:</h3>
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<pre><code>echo "1985/10/28" | ./morgan1
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echo "1996/12/31" | ./morgan1
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</code></pre>
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<p>Try pressing the arrow keys when your focus is in the window.</p>
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<h3>Selected Judges Remarks:</h3>
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<p>To verify the output, try echoing the date of an evening with a clear sky.
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Use binoculars and/or telescope as needed. In some cases you may need
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to wait for a better time of the evening. In a few cases, such as
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the South Pole in the summer, you may need to move to a different
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observing site.</p>
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<h2>Author’s comments:</h2>
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<h1>Instructions</h1>
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<p>It displays the position of the 8 planets of the solar system around the sun.
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The date given in the command line is in the format YYYY/MM/DD (year, month and
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day). The direction keys can be used to move in time :
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Left : go back 1 day.
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Right : go forward 1 day.
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Down : go back 20 days.
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Up : go forward 20 days.</p>
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<p>It handles correctly all leap years and the switch between julian calendar and
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gregorian calendar (10 days missing between 1582/10/04 and 1582/10/15).</p>
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<p>The scale is logarithmic to be able to display the 8 planets without having
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Mercury, Venus, Earth and Mars squizzed around the sun.</p>
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<p>The size is not proportinal either.</p>
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<h1>Bonus</h1>
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<p>It also displays the position of 2 famous comets during their last approach :
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- The first one arround the third IOCCC.
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- The second one between the thirteenth and fourteenth IOCCC.</p>
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<h1>Limitations</h1>
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<ul>
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<li>ASCII character set is assumed.</li>
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<li>a c99 compiler is required (for some math.h functions).</li>
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<li>The position should be correct for years between (-1000; +3000)</li>
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<li>The approximations done in the formula are OK for displaying the
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position around the sun but not for other applications like ephemeride or
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sky view from Earth (angles may be off by 1 or 2 degrees sometimes).</li>
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</ul>
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<h1>Obfuscation</h1>
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<ul>
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<li>Reuse of 1 letter variables.</li>
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<li>Only the main function with some for loops.</li>
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<li>Constants for orbital elements encoded in a string.</li>
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<li>Hexadecimal and decimal values used inconsitentely.</li>
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<li>Comparisons order are not consitent.</li>
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<li>A lot of stuff is done in the different parts of the for loop.</li>
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</ul>
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<h1>Compilation warnings</h1>
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<p>with gcc 4.7.2 on Linux Ubuntu 12.10 :
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* prog.c:38:3: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
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* prog.c:40:34: warning: value computed is not used [-Wunused-value]
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* prog.c:56:6: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
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* prog.c:58:50: warning: value computed is not used [-Wunused-value]
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* prog.c:61:5: warning: suggest parentheses around ‘-’ inside ‘>>’ [-Wparentheses]</p>
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<p>with clang 3.1 on Linux Ubuntu 12.10 :
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* prog.c:38:49: warning: ‘&&’ within ‘||’ [-Wlogical-op-parentheses]
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* prog.c:38:27: warning: ‘&&’ within ‘||’ [-Wlogical-op-parentheses]
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* prog.c:55:13: warning: ‘&&’ within ‘||’ [-Wlogical-op-parentheses]
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* prog.c:56:14: warning: ‘&&’ within ‘||’ [-Wlogical-op-parentheses]</p>
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<p>Due to most parentheses and braces removed when unecessary.</p>
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<p>To verify the display, you can look at one of this programs :
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* xephem : http://www.clearskyinstitute.com/xephem/
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* homeplanet : http://www.fourmilab.ch/homeplanet/
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* http://www.theplanetstoday.com/</p>
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<hr />
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<TABLE><TR>
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<TD><a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/3.0/88x31.png" /></a></TD>
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<TD><P>© Copyright 1984-2015,
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<A HREF="/judges.html">Leo Broukhis, Simon Cooper, Landon Curt Noll</A>
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- All rights reserved<BR>
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This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/">Creative Commons Attribution-ShareAlike 3.0 Unported License</a>.</P></TD>
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<TD> <!--<a href="http://validator.w3.org/check?uri=referer"><img src="http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01 Transitional" height="31" width="88"></a>--></TD>
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</TR></TABLE>
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</body>
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</html>
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