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Master Member
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引用:
Originally posted by samsung
http://discuss.microsoft.com/SCRIPT...1&F=&S=&P=12046
你是說DOOM3?很不幸的,DOOM3因為需要Stencil ,而R300開啟Stencil,他的HyperZ III 不能開啟,所以R300的在DOOM3效能是被低估的,這點ATI的Richard Huddy(從MS跳槽的ATI的員工)解釋 >
The same document states that stencil test harms quick z
>rejection. How much?
Lots! The fast Z rejects (or accepts) which result from the hierarchical Z
buffer can make things run about 4 times faster than you might naively
expect. That's quite a benefit - and you lose that all when you enable the
stencil test.
Thanks,
Richard "7 of 5" Huddy
European Developer Relations Manager, ATI
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嗯....基本上所有加速Z-Buffer存取的方法都有可能沒辦法在stencil test開啟
時運作.....
這位Richard老兄以前是MS的DirectX Team的人.常在MS的DX maillist看他回
答問題.後來跳槽到ATI(難怪突然覺得ATI跟MS的關係變好了).就是上次我提過
在DX maillist上說nVidia的CG不好,被一堆人罵到臭頭的人.....  |