Doom 3: OpenGL, right?

BYUNews · 08-14-04, 06:13 PM

Hey guys.
Doom 3 runs on OpenGL, which is why nVidia cards do so well on it, right? Why does the Doom 3 installer contain DirectX 9.0B in the "extras" section? It boggles the mind - how would having a new version of DirectX affect this game if it uses OpenGL?

FierceDeityLink · 08-14-04, 06:33 PM

DirectSound?

jAkUp · 08-14-04, 06:38 PM

It thought it was funny also... when installing the game it said "You need to have dx9b installed or it will not function."

BYUNews · 08-14-04, 06:47 PM

Yeah, what's up with that? Can someone enlighten me?

karkrash81 · 08-14-04, 06:51 PM

Direct X 9b doesn't just involve the graphics...it effects many parts of your system ... direct x deals with keyboards, joysticks, sound mixing, etc...it basically helps make everything multimedia wise work together well

and i believe openGL also can utilize some direct x effects...not sure on that one...i think openGL has shader model 2.x capabilities

here's a quickie definition from http://webopedia.internet.com/TERM/D/DirectX.html

A set of APIs developed by Microsoft that enables programmers to write programs that access hardware features of a computer without knowing exactly what hardware will be installed on the machine where the program eventually runs. DirectX achieves this by creating an intermediate layer that translates generic hardware commands into specific commands for particular pieces of hardware. In particular, DirectX lets multimedia applications take advantage of hardware acceleration features supported by graphics accelerators.

maybe when ID was developing the game they were using dx 9.0b in their hardware so the end useres would need it as well...

**saturnotaku** · 08-14-04, 08:01 PM

DirectX is the entire API that allows all your hardware to interact with a game. Direct3D is the graphical component. As has been mentioned, you also have Direct Sound, Direct Play and other components.

Saying that a game is DirectX (as compared to OpenGL) is a bit of a misnomer.

BYUNews · 08-14-04, 10:11 PM

Ah, I see. That makes a little more sense. Thanks for the quick and informative reply!

08-14-04, 06:13 PM	#1
BYUNews Guess Who's Back Join Date: Jul 2004 Posts: 87	Doom 3: OpenGL, right? Hey guys. Doom 3 runs on OpenGL, which is why nVidia cards do so well on it, right? Why does the Doom 3 installer contain DirectX 9.0B in the "extras" section? It boggles the mind - how would having a new version of DirectX affect this game if it uses OpenGL?

08-14-04, 06:33 PM	#2
FierceDeityLink Registered User Join Date: Jul 2004 Posts: 390	Re: Doom 3: OpenGL, right? DirectSound? __________________ P4 3.2C\|Asus P4C800-E DX\|2GB Corsair DDR400\|BFG Geforce 6800 Ultra\|Antec TrueControl 550 Koolance EXOS 2\|PolarFLO TT CPU\|Danger Den NV-68\|Danger Den MAZE4 chipset

08-14-04, 06:38 PM	#3
jAkUp eat. sleep. overclock. Join Date: Dec 2002 Location: Chino, California Posts: 17,744	Re: Doom 3: OpenGL, right? It thought it was funny also... when installing the game it said "You need to have dx9b installed or it will not function." __________________ 965xe \|\| evga x58 classified \|\| 3x evga gtx 480 \|\| 6gb g.skill \|\| win7 x64

08-14-04, 06:47 PM	#4
BYUNews Guess Who's Back Join Date: Jul 2004 Posts: 87	Re: Doom 3: OpenGL, right? Yeah, what's up with that? Can someone enlighten me?

08-14-04, 06:51 PM	#5
karkrash81 Do you like dags? Join Date: Jul 2004 Location: Columbus, OH Posts: 742	Re: Doom 3: OpenGL, right? Direct X 9b doesn't just involve the graphics...it effects many parts of your system ... direct x deals with keyboards, joysticks, sound mixing, etc...it basically helps make everything multimedia wise work together well and i believe openGL also can utilize some direct x effects...not sure on that one...i think openGL has shader model 2.x capabilities here's a quickie definition from http://webopedia.internet.com/TERM/D/DirectX.html A set of APIs developed by Microsoft that enables programmers to write programs that access hardware features of a computer without knowing exactly what hardware will be installed on the machine where the program eventually runs. DirectX achieves this by creating an intermediate layer that translates generic hardware commands into specific commands for particular pieces of hardware. In particular, DirectX lets multimedia applications take advantage of hardware acceleration features supported by graphics accelerators. maybe when ID was developing the game they were using dx 9.0b in their hardware so the end useres would need it as well... __________________ My System: Athlon 64 x2 3800+ overclocked to 4600+/2 GB Geil PC3200/8800 GTS 320 mb/Asus A8N SLI Premium motherboard/Logitech z-680's/Total of 760 GB of Hard Drive Space (2x300 + 1x160)/audigy 2/Two 20.1" Widescreen LCD's (Dell 2005fpw) Favorite movie: Snatch/Favorite Game: NOLF/Song of the Week: "You Know I'm No Good" by Amy Winehouse/What I'm Playing this Week: Nothing! Last edited by karkrash81; 08-14-04 at 07:19 PM.

08-14-04, 08:01 PM	#6
saturnotaku Apple user. Deal with it. Join Date: Jul 2001 Location: The 'burbs, IL USA Posts: 12,502	Re: Doom 3: OpenGL, right? DirectX is the entire API that allows all your hardware to interact with a game. Direct3D is the graphical component. As has been mentioned, you also have Direct Sound, Direct Play and other components. Saying that a game is DirectX (as compared to OpenGL) is a bit of a misnomer.

08-14-04, 10:11 PM	#7
BYUNews Guess Who's Back Join Date: Jul 2004 Posts: 87	Re: Doom 3: OpenGL, right? Ah, I see. That makes a little more sense. Thanks for the quick and informative reply!

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