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Simple Ray Tracer using openGL

I am looking for code to a simple ray tracer.  I am not worried about shadow and reflections, I just want to draw a simple sphere.  From there I will research how to add the shadows and reflections.  Just needing a start.
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Jaziar
Asked:
Jaziar
2 Solutions
 
SammoCommented:
Haven't looked into this in depth but it looks like it might help you out:

http://homepages.paradise.net.nz/nickamy/simpleraytracer/simpleraytracer.htm

Sam
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davebytesCommented:
At what level do you want to do raytracing?  I ask since you specify OpenGL, and normally raytracing wouldn't interact with hardware rendering...

Here's some possible links, depending on your desires/needs:

Devmaster.net series on raytracing:
http://www.devmaster.net/articles/raytracing_series/part1.php

Raytracing on Ge6-class cards using shaders:
http://www.clockworkcoders.com/oglsl/rt/
The research paper for the above project:
http://gpurt.sourceforge.net/DA07_0405_Ray_Tracing_on_GPU-1.0.5.pdf

An old friend of mine was a contributor to one of the first raytracing approaches using off-the-shelf GPUs.  A good read if you are looking in that direction:
http://graphics.stanford.edu/papers/rtongfx/rtongfx.pdf

-d
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