rec.autos.simulators

OpenGl or D3D?

PG

OpenGl or D3D?

by PG » Tue, 06 Mar 2001 11:20:53

Just got Nascar 4. What do you guy's figure is the best for running it with?
I'am not really sure, but it look's like OpenGL is working the best with my
setup.
Although putting any fsaa on, dramatically lower's frame rate(read:
unplayable)
I'am using a Asus Geforce 2 32meg with the 1050 drivers.
P3-900+,256mram,etc,etc,
I find i have to run it 1024x768x16 and most option's turned down to get a
fairly good frame rate with 20+ cars..........
Any tips for improving performance with this game?
Thanks.................................
Don Burnett

OpenGl or D3D?

by Don Burnett » Tue, 06 Mar 2001 11:23:59

Your best performance will be with open gl, 16 bit color, no fsaa, and
disabling vsynch.

--
Don Burnette
D Burnette in N4

Some people do nothing wrong.
The problem is, they do nothing.
And THAT is wrong.


chainbreake

OpenGl or D3D?

by chainbreake » Tue, 06 Mar 2001 19:57:58


Second that!

Jerry Morelock

Thom j

OpenGl or D3D?

by Thom j » Tue, 06 Mar 2001 23:43:42

Honest Q...? What is the difference of 32bit verses 16bit? And why is it
better to use 16bit over 32bit? in setup? Fps for the sims? 'i.e. N4, GPL
Tia.. Thom_j.
PC Specs:
Pent III 800mhz CPU, Abit SA6R mo'board, 256megs of PC133Dram,
Asus V7700 64mb GeForce2 Pro video card,  Twin Voodoo2 cards in
SLI, Three-30gig Hardrives, ViewSonic PS790 20" Monitor, Quillemot
FF Ferrari Race Wheel and Quillemot FF Joystick..


|


| > Your best performance will be with open gl, 16 bit color, no fsaa, and
| > disabling vsynch.
| >
|
| Second that!
|
| Jerry Morelock
|
|

Gregor Vebl

OpenGl or D3D?

by Gregor Vebl » Tue, 06 Mar 2001 23:49:10


> Honest Q...? What is the difference of 32bit verses 16bit? And why is it
> better to use 16bit over 32bit? in setup? Fps for the sims? 'i.e. N4, GPL
> Tia.. Thom_j.

Honest A...

The number of bits tells you how many shades of colour you get. For
example, with 16 bit you only get 16 levels of grey from black to white,
while 32 bits will give you 256 levels. Therefore, in 16 bit you
sometimes get the effect of 'banding' where the color transitions should
be subtle, and the 16 bit representation isn't good enough, so the
colors have discrete bands on screen. In racing games, it's usually the
smoke that shows this artifact.

However, the 32 bit means that the fillrate will be much lower as the
card needs to manipulate twice as much data.

So, it's all a graphics quality vs. speed issue, as always.

-Gregor

Thom j

OpenGl or D3D?

by Thom j » Wed, 07 Mar 2001 00:09:26

Gregor, First thank you for the quick informative reply!!
I thought this was the reason but I wanted to ask the Gurus in RAS
just to make sure <g>... I've always used 32bit on my desktop but
since everyone had really emphasized the 16bit for setup I am now
making sure I use it now and it did make a big "diff" in N4.
Thanx Again Thom_j.


<snipped>
| So, it's all a graphics quality vs. speed issue, as always.

| -Gregor

<n..

OpenGl or D3D?

by <n.. » Wed, 07 Mar 2001 03:29:08

Right answer but the numbers are a bit off.  8 bit is 256 colours.  16 bit
colour actually produces a palette of 65536 colours while 32 bit colour
results in a palette of roughly 4.3 million colours.
S.



> > Honest Q...? What is the difference of 32bit verses 16bit? And why is it
> > better to use 16bit over 32bit? in setup? Fps for the sims? 'i.e. N4,
GPL
> > Tia.. Thom_j.

> Honest A...

> The number of bits tells you how many shades of colour you get. For
> example, with 16 bit you only get 16 levels of grey from black to white,
> while 32 bits will give you 256 levels. Therefore, in 16 bit you
> sometimes get the effect of 'banding' where the color transitions should
> be subtle, and the 16 bit representation isn't good enough, so the
> colors have discrete bands on screen. In racing games, it's usually the
> smoke that shows this artifact.

> However, the 32 bit means that the fillrate will be much lower as the
> card needs to manipulate twice as much data.

> So, it's all a graphics quality vs. speed issue, as always.

> -Gregor

Thom j

OpenGl or D3D?

by Thom j » Wed, 07 Mar 2001 03:56:01

But S. the big diff in using 16 to 32bit in games/sims that need high fps
is 32bit does a real drain on the CPU & Video card that inturn slows
all this down... right?? Thom_j.


| Right answer but the numbers are a bit off.  8 bit is 256 colours.  16 bit
| colour actually produces a palette of 65536 colours while 32 bit colour
| results in a palette of roughly 4.3 million colours.
| S.
|



| > >
| > > Honest Q...? What is the difference of 32bit verses 16bit? And why is
it
| > > better to use 16bit over 32bit? in setup? Fps for the sims? 'i.e. N4,
| GPL
| > > Tia.. Thom_j.
| >
| > Honest A...
| >
| > The number of bits tells you how many shades of colour you get. For
| > example, with 16 bit you only get 16 levels of grey from black to white,
| > while 32 bits will give you 256 levels. Therefore, in 16 bit you
| > sometimes get the effect of 'banding' where the color transitions should
| > be subtle, and the 16 bit representation isn't good enough, so the
| > colors have discrete bands on screen. In racing games, it's usually the
| > smoke that shows this artifact.
| >
| > However, the 32 bit means that the fillrate will be much lower as the
| > card needs to manipulate twice as much data.
| >
| > So, it's all a graphics quality vs. speed issue, as always.
| >
| > -Gregor
|
|

<n..

OpenGl or D3D?

by <n.. » Wed, 07 Mar 2001 05:02:46

Yes, 32 bit graphics are more system intensive than 16 bit.  In general,
games will run faster in 16 bit than 32, though it depends on to what degree
the game is fill-rate limited, or geometry/AI/etc limited.


> But S. the big diff in using 16 to 32bit in games/sims that need high fps
> is 32bit does a real drain on the CPU & Video card that inturn slows
> all this down... right?? Thom_j.



> | Right answer but the numbers are a bit off.  8 bit is 256 colours.  16
bit
> | colour actually produces a palette of 65536 colours while 32 bit colour
> | results in a palette of roughly 4.3 million colours.
> | S.
> |



> | > >
> | > > Honest Q...? What is the difference of 32bit verses 16bit? And why
is
> it
> | > > better to use 16bit over 32bit? in setup? Fps for the sims? 'i.e.
N4,
> | GPL
> | > > Tia.. Thom_j.
> | >
> | > Honest A...
> | >
> | > The number of bits tells you how many shades of colour you get. For
> | > example, with 16 bit you only get 16 levels of grey from black to
white,
> | > while 32 bits will give you 256 levels. Therefore, in 16 bit you
> | > sometimes get the effect of 'banding' where the color transitions
should
> | > be subtle, and the 16 bit representation isn't good enough, so the
> | > colors have discrete bands on screen. In racing games, it's usually
the
> | > smoke that shows this artifact.
> | >
> | > However, the 32 bit means that the fillrate will be much lower as the
> | > card needs to manipulate twice as much data.
> | >
> | > So, it's all a graphics quality vs. speed issue, as always.
> | >
> | > -Gregor
> |
> |

Don Burnett

OpenGl or D3D?

by Don Burnett » Wed, 07 Mar 2001 09:18:06

32 bit is just too much of a hog with today's systems, for the little gain
you would see visually. As systems get faster you would probably see more
folks running 32 bit.
16 bit will defintely give you better perfomance as far as fps.

--
Don Burnette
D Burnette in N4

Some people do nothing wrong.
The problem is, they do nothing.
And THAT is wrong.


> Honest Q...? What is the difference of 32bit verses 16bit? And why is it
> better to use 16bit over 32bit? in setup? Fps for the sims? 'i.e. N4, GPL
> Tia.. Thom_j.
> PC Specs:
> Pent III 800mhz CPU, Abit SA6R mo'board, 256megs of PC133Dram,
> Asus V7700 64mb GeForce2 Pro video card,  Twin Voodoo2 cards in
> SLI, Three-30gig Hardrives, ViewSonic PS790 20" Monitor, Quillemot
> FF Ferrari Race Wheel and Quillemot FF Joystick..



> |


> | > Your best performance will be with open gl, 16 bit color, no fsaa, and
> | > disabling vsynch.
> | >
> |
> | Second that!
> |
> | Jerry Morelock
> |
> |

daxe

OpenGl or D3D?

by daxe » Wed, 07 Mar 2001 13:10:03


>Right answer but the numbers are a bit off.  8 bit is 256 colours.  16 bit
>colour actually produces a palette of 65536 colours while 32 bit colour
>results in a palette of roughly 4.3 million colours.

24 bit color results in 16.77 million colors, the result of 256 to the
third power.  There are 256 possible levels per pixel in each of the
three colors, red, green and blue.

Since 24 bit is equivalent to 16.77 million colors, it is doubtful
that 32 bit results in less.  In fact, the extra 8 bits is not even
useful as color information.  In a game, it works like 24 bit, but
with the extra 8 bits being used for things like transparency, I
believe.

~daxe


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