From 1c67bfc7e84cae6468d6a61e870ef242cbfa0701 Mon Sep 17 00:00:00 2001
From: rodri <rgl@antares-labs.eu>
Date: Tue, 2 Jun 2020 20:52:52 +0000
Subject: add a readme.

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+# The Business Card Ray Tracer (Not Working)
+
+This is a more readable adaptation of Andrew "aek" Kensler's original
+1337-size ray tracer written in plan 9 C.
+
+Sadly it doesn't work yet.  I'll have to go through it more thoroughly
+to find out the quirkyness that makes it generate a smaller, wrong
+file.
+
+You can read an updated version of his
+[here](http://eastfarthing.com/blog/2016-01-12-card/).
+
+I also recommend you take a look at Paul Heckbert's “A Minimal Ray
+Tracer”, Graphics Gems IV.
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