MY80- Δημοσ. 11 Μαρτίου 2003 Δημοσ. 11 Μαρτίου 2003 To akoloutho image einai ena gifaki me thn fx 5800 ultra (me tous drivers pou xtypaei panw apo 5k 3dmarks) kai thn 9700pro na kanoune render to idio frame (einai image comparison opote ta fps einai 0, mh sas fanei paraxeno <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/tongue.gif" alt="" /> ). http://www.sunflower.com/~jfrost/fxaticomp2.gif Tha pw merika pramatakia gia to ti ypostirizei h kathe karta ki apo kei kai pera vgale ta symperasmata sas monoi sas <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/smile.gif" alt="" /> R9700pro->24bit floating point precision/kanali stous pixel shaders. (32bit fp/channel se ola ta ypoloipa alla einai asxeto me to thema mas). Auth einai to monadiko format pou ypostirizei kai mono auto to precision borei na xrhsimopoihsei stous PS. GF-FX 5800 Ultra->Einai arketa flexible mias kai ypostirizei 12bit integer (gia ps=<1.3 ) kai FP16 kai FP32 (gia ps2/2+. Na shmeiwthei oti kai tous 1.4 tous exomeiwnei me ps2). Axizei epishs na shmeiwthei oti me thn proprietary extension (kai mono me auth) ths nvidia gia fragment programs (pixel shaders) sto OpenGL borei na xrhsimopoiei kai thn integer pipeline kai thn floating point taytoxrona (me antistoixo precision sthn kathe mia). To elaxisto precision pou prepei na xrhsimopoiei mia karta gia na einai DX9 compliant se ps2 na einai FP24. So, apo pou nomizete oti hrthane sxedon 2000 parapanw pontoi ? <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/wink.gif" alt="" /> Kai mia mikrh isagwgh sta nerdish <img src="http://www.insomnia.gr/ubbthreads/images/graemlins/smile.gif" alt="" /> FP = floating point = "akrivia dekadikou" (vasika kiniths ypodiastolhs einai alla pisteyw to akrivia dekadikou ginetai pio eykola katanohto) Int = Integer = akrivia akeraiou PX, (4/3) * 3 me FP precision mas kanei 1.33333... + 1.33333... + 1.33333... = 3.99999... (ta enniaria exartwntai apo to posa bit precision exoume) enw akrivws h idia parastash me Integer precision mas kanei 1 + 1 + 1 = 3. Epishs, just for reference, sth sygekrimenh skhnh to nero ftiaxnetai me ps2, to grasidi me ps1.4 (pou exomoionetai me tis monades ps2 kai stis 2 kartes) enw o ouranos me DX9 HDR (High Dynamic Range).
Toufas Δημοσ. 11 Μαρτίου 2003 Δημοσ. 11 Μαρτίου 2003 pantos an to evlepa se demo den tha to katalavena.... tora pou dixnei akrivos tis eikones fenete mia diafora eidika ston ourano me ta kladia nerdish...pios allos sto eipe afto simera ?
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