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3d graphics patents

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For a well-documented example, see OpenGL.

[edit] Cone-step mapping

The technique of cone-step mapping is encumbered up by US5355442.[1]

This was noticed in 2006 by members of the gamedev.net forum.[2]

A summary was posted in 2010 to the "OpenGL 4.0 preview driver" forum, on AMDZone.com:

Unfortunately Cone-Step Mapping is patent encumbered for the next year or two. The original author of it was informed of the infringed patent after quite a bit of development. I think the patent is on data processing for MRI/CTscan data, and also fails the obviousness test. I won't elaborate, but given the mathematics of raytracing a randomly rough surface, many others have come up with the same equations, then had to dumb things down to avoid that patent.
by Montaray Jack on Sat Apr 03, 2010 4:56 am[3]

[edit] Related pages on en.swpat.org

[edit] References

  1. http://www.patentstorm.us/patents/5355442/fulltext.html
  2. http://www.gamedev.net/community/forums/topic.asp?topic_id=372739&whichpage=6&#2599175
  3. http://www.amdzone.com/phpbb3/viewtopic.php?f=527&t=137567#p180036


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