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Submitted by George Ziniewicz, posted on May 13, 2001




Image Description, by George Ziniewicz



This is a screen of a recent OpenGL app I wrote for the OpenGL Challenge.

Nothing that special (a joyriding simulation), but curious is a round noisy lightmap I added over the scene when I was done with a frame. The noise is procedurally generated about 20 x a second (I run around 100 fps on a GeForce2), rides atop a fixed noise value per line, and a cone, providing an effect of an "old-time" television: noise, discrete horizontal line noise for a slight banding effect, and corner vignetting.

The effect is better when viewed animated:

http://zintel.com/apps/HiwayZ.zip

The OpenGL Challenge site has it w/ source: http://OGLChallenge.OTri.net/. The effect can be toggled (key "i"), noise level adjusted (), and size adjusted ([]). Or try for a popup menu, and select "Options", there are plenty of adjustors.

Also of note in the app is a retro 3-2-1 intro, and a closing screen "splintering" effect, which does 255 variations of "chop the screen into bits and move them". Toggle key "x" to demo.

zin


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Archive Notice: This thread is old and no longer active. It is here for reference purposes. This thread was created on an older version of the flipcode forums, before the site closed in 2005. Please keep that in mind as you view this thread, as many of the topics and opinions may be outdated.
 
Brian

May 15, 2001, 01:40 PM

Not that I know of. See my Seraphim.scr (you probably still have it) for an example of how M$ expects you to do it (kind of a pain the first time.

Brian

 
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