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Artx1
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加入日期: Jun 2002
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Originally posted by 宗毛
nv40的色彩壓縮比是多少?

UltraShadow2那邊,意思是nv40是64x0囉?


色彩壓縮部份好像還是維持IntellisampleHCT,所以是~6x。

UltraShadow2的部份,引一下3Dcenter的文字:
NV40 has 16 ROPs. Sounds like one ROP per pipe. But nVidia implemented a "fragment crossbar".
This now ensures the use of ROPs where they are needed the most.
With the "advanced" ROPs since NV30, up to 32 "zixels" can be rendered per single clock cycle.
Again, forget about "pipeline counts" as this would mean NV40 could be considered a 32 pipeline design (this would be bogus, of course.)
With 4x antialiasing we have up to 64 subpixel per clock forcing the ROPs to loop.


嗯,所以32x0應該是stencil-test的部份,Z-Test則好像比較大?
不過ROP裡面應該還是只有兩個Z-Comp啊。
雖說3DCenter認為那個Fragment Crossbar會在這邊發揮效用,
不過我本來是以為那個是用來在OpenGL底下做一些影像處理效果的東西說。
原來還真的可以這樣用嗎....

bais的部份,好像有筆誤....? ^^a
舊 2004-04-15, 10:46 AM #5
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