215 lines
7.9 KiB
HTML
215 lines
7.9 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>FART (FART Ain't A RayTracer)</title>
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<style type="text/css">
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body {
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margin: 0.2em 2ex;
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tt {
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display: block;
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margin: 0.4em 0px;
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padding: 0.1em 0.8ex;
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background-color: #FFF;
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border-style: dashed;
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border-width: 1px;
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border-color: #900;
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}
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img { border-style: none; }
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</style>
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</head>
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<body>
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<h1 style="text-align:center">FART (FART Ain't A RayTracer)</h1>
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<div style="text-align:center">
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<a class="link" href="#description">Project Description</a>
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<a class="link" href="#code">Code</a>
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<a class="link" href="design.html">Design Document</a>
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<a class="link" href="#screenshots">Screenshots</a>
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<a class="link" href="report.html">Final Report</a>
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</div>
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<hr/>
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<a name="description" />
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<h2>Project Description</h2>
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<p>
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FART is my semester project for the Computer Science 658 class
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at Grand Valley State University.
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My goal is for FART to be a distributed, object-oriented raytracer.
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The name is a
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<a href="http://en.wikipedia.org/wiki/Recursive_acronym">recursive acronym</a> similar to GNU or LAME.
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</p>
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<p>
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FART will take in a scene-description file in some sort of
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ASCII-based input file format.
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After the scene file is parsed, it will be raytraced (rendered)
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according to the render options.
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Some of these options can be specified on the command line and
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others can be specified in the scene description file.
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When a given option can be specified both places, the command-line
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options will override what is in the scene file.
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</p>
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<p>
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Rendering can be done using the built-in distributed algorithm.
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Command-line options will be utilized to specify a "host file"
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which can contain a list of hosts to use while rendering the scene.
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The algorithm will be fault-tolerant so that if one of the worker
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nodes goes down the work can be reorganized to complete that
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section of the image.
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</p>
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<hr/>
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<a name="code" />
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<h2>Code</h2>
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<p>
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You can retrieve a copy of FART from my Subversion repository
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using the command
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<tt>svn co svn://holtrop.homelinux.com/fart/trunk fart</tt>
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Build using <tt>make</tt>
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and run with something like
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<tt>./fart scenes/infinity.fart</tt>
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</p>
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<hr/>
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<a name="screenshots" />
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<h2>Screenshots</h2>
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<div style="text-align:center">
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<p>
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<img src="rev_25.png" alt="rev_25" />
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<br/>
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Revision 25 - I can write .bmp files but I'm not doing
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anything with scene data yet.
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</p>
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<p>
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<img src="rev_43.png" alt="rev_43" />
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<br/>
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Revision 43 - FART can intersect a ray with a sphere
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but doesn't have lighting/shading/material colors yet...
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</p>
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<p>
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<img src="rev_45.png" alt="rev_45" />
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<br/>
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Revision 45 - cheap lighting based on implicit light source
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at the viewpoint
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</p>
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<p>
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<img src="rev_46.png" alt="rev_46" />
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<br/>
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Revision 46 - multisampling is working (back to a flatly-shaded
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sphere to show the anti-aliasing effect on the edges)
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</p>
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<p>
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<img src="rev_62.png" alt="rev_62" />
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<br/>
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Revision 62 - added a Plane shape type, I really need to
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get some better lighting working
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</p>
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<p>
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<img src="rev_76.png" alt="rev_76" />
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<br/>
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Revision 76 - Phong shading model working with
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ambient, diffuse, and specular light components
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</p>
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<p>
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<img src="rev_121.png" alt="rev_121" />
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<br/>
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Revision 121 - Added a Box object. No, it didn't take 45 revisions
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just for that. I've been working on the parser for the scene input
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files a lot as well.
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</p>
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<p>
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<img src="rev_134.png" alt="rev_134" />
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<br/>
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Revision 134 - Added a Cyl object.
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Cyl objects can be cones or cylinders - they have a bottom
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radius, a top radius, and a height.
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</p>
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<p>
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<img src="rev_155.png" alt="rev_155" />
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<br/>
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Revision 155 - Boolean intersections working.
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I had to rework the way I was returning intersections to also
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return a reference to the actual shape that was intersected with
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so that Intersect shapes would really return the child shape that
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produced the point.
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</p>
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<p>
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<img src="rev_162.png" alt="rev_162" />
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<br/>
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Revision 162 - a few bug fixes, and added Union and Subtract
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shape types.
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</p>
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<p>
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<img src="rev_176.png" alt="rev_176" />
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<br/>
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Revision 176 - More bug fixes, and reading the scene description
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from a file is finally working!
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</p>
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<p>
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<img src="rev_180.png" alt="rev_180" />
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<br/>
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Revision 180 - Material definitions working
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</p>
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<p>
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<img src="rev_187.png" alt="rev_187" />
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<br/>
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Revision 187 - Recursion working for transparent objects.
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Rays sent from surface point to each light source now intersect
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with other objects to produce shadows depending on the transparency
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of the objects between the surface point and the light source.
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</p>
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<p>
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<a href="csg.png"><img src="rev_196.png" alt="rev_196" /></a>
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<br/>
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Revision 196 - Added scenes/csg.fart as an example of doing
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<a href="http://en.wikipedia.org/wiki/Constructive_solid_geometry">CSG</a>.
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Also fixed a bug in the loading of boolean objects.
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</p>
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<p>
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<a href="subtract-subtract.png"><img src="rev_202.png" alt="rev_202" /></a>
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<br/>
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Revision 202 - Changed intersection method to also return surface
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normals (instead of accessing them through a separate function,
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getNormalAt()).
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This allowed Subtract objects to invert the normals obtained by
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the sub-object being subtracted out.
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This, in turn, allowed subtractions of subtractions to re-invert
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them, and so on and so forth...
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</p>
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<p>
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<a href="infinity1440.png"><img src="infinity-sm.png" alt="infinity-sm" /></a>
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<br/>
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Infinity
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<br/>
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Created from <span style="font-family: monospace;">scenes/infinity.fart</span>
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</p>
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<p>
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<a href="die2.png"><img src="die2-sm.png" alt="die2-sm" /></a>
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<br/>
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Die
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<br/>
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Created from <span style="font-family: monospace;">scenes/die.fart</span>
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</p>
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</div>
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</body>
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</html>
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