Carmack's Reverse is a computer graphics technique for stencil shadow volumes that solves the problem of when the viewer's "eye" enters the shadow volume by tracing backwards from some point at infinity to the eye of the camera. Although it was originally discovered by William Bilodeau and Michael Songy, who filed a patent for it in 1999, John Carmack discovered it independently in 2000 during the development of Doom 3 and is generally given credit for it since he, unlike Bilodeau and Songy, advertised his discovery to the larger public. Computer graphics (CG) is the field of visual computing, where one utilizes computers both to generate visual images synthetically and to integrate or alter visual and spatial information sampled from the real world. ... Categories: Wikipedia cleanup | Stub | Computer graphics ... Software patents and patents on computer-implemented inventions (CII) are a class of patents and one of many legal aspects of computing. ... 1999 (MCMXCIX) was a common year starting on Friday, and was designated the International Year of Older Persons by the United Nations. ... John Carmack is a widely recognized and influential game programmer. ... This article is about the year 2000. ... Doom 3 is a sci-fi horror first-person shooter computer game developed by id Software and published by Activision. ...
Incidentally, Creative Labs holds the patent and reached a deal with Id Software which allows free usage of algorithm in exchange of future support of EAX technology. Creative Technology Ltd. ... Id Software is a computer game developer based in Mesquite, Texas, a suburb of Dallas. ... In computing, EAX can refer to: A register in the IA-32 architecture, The common abbreviation for Environmental Audio Extensions, a Sound Blaster technology. ...
A while back Carmack posted as to why EAX wouldn't be in the game, and he said it was because now his method allows him to do what he wants with the sound, not just add crappy reverb effects.
Than about a year ago Carmack came out and said he would be using said technology in Doom 3, not knowing that Creative has a patent on it.
Carmack'sReverse (what the technique is commonly known as) was discussed in length on multiple high-profile sites among developers and those with a high degre of interest in development.
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