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  Help needed creating a background cube  (Read 935 times)
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Offline zingbat

Senior Duke




Java games rock!


« Posted 2004-04-04 18:16:09 »

The java3d spec says that to use custom geometry like a cube it has to be mapped to a unit sphere then projected into infinity. That part is a little dubious cause it doesnt say if it is us who have to prepare the geometry or if its java3d that will transform it. So in short how do you prepare a cube to be usable by a Background node according to the spec ?
Offline Herkules

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« Reply #1 - Posted 2004-04-05 04:22:47 »

http://www.java-gaming.org/cgi-bin/JGNetForums/YaBB.cgi?board=3D;action=display;num=1079813439

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Offline endolf

JGO Coder


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« Reply #2 - Posted 2004-04-05 06:44:09 »

Hi
 The gemoetry you need to create must fit inside a 1 unit sphere, thats all you need to worry about. So for a background cube you need it to go from -0.7 to 0.7 in all axis.

HTH

Endolf

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Offline zingbat

Senior Duke




Java games rock!


« Reply #3 - Posted 2004-04-05 19:26:39 »

Hi thanks to both of you. I think that hit the spot.

About -7 to 7 thats 1.4 ~ square two right ?
Offline tom
« Reply #4 - Posted 2004-04-05 20:47:30 »

0.7 is approx cos(45)

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