TechDemo 0.0.1 (Linux and W32 users! )

oliver · Post by **oliver** » 17 Jul 2004 23:36

Hi guys,

now this isn't conciderd to be TE code, however, this _is_ supposed to demonstrate how to easly incooperate SDL OpenGL and OpenAL.

It's just a little demo I copy pasted wrote while playing with the various libraries out there.

I tryed to use the examples of the OpenGL Red Book as these are the clearest and ported them to use SDL instead of GLUT. Then OpenAL was added using the panning2d demo from OpenAL.

Again this only demonstrates the incoropration of various libs to be used maybe as a base, nothing more nothing less. Just to let you guys know that gears are grinding : )

(The OpenAL libs should have been installed with your sound card accelerated drivers. I understand however that a lot of people might not have these. So here's the URL to Creative's version. nVidia has one too but it apears to be the same .exe anyhow. OpenAL
The SDL .zip file is at libsdl.org The sdl.dll should be copyed into the windows system folder or just put it right next to the binary.
Gentoo users just emerge sdl and openal : )

So to summirze what you need to run this bin in windows:
TechDemo.exe (included)
data/boom.wav
sdl.dll
openal32.dll
alut.dll
opengl32.dll
glu32.dll

You should have all of these right next to the binary or in the system folder.

For those who wanna look at the code and maybe even compile it yourself, the devcpp project file is included. Upgrade to the latest version (4.9.8.10) and use the integrated package update manager to install SDL, OpenGL and OpenAL to get all the libs integrated into the src. (runtime .dll's are then also in the dev-cpp\lib\*.dll dir so no need to install all the libs using the above mentioned installers.

That'll be all for today.

ChrisCF · Post by **ChrisCF** » 18 Jul 2004 01:51

Lots of reference to "this", but I can't see a "this" anywhere. Perhaps someone forgot to attach something

Arathorn · Post by **Arathorn** » 18 Jul 2004 15:28

I think so too, but it's very encouraging to see that there is "something" in this project.

oliver · Post by **oliver** » 18 Jul 2004 16:15

god damned.

I attached and later edited the post, obviously the attachment then went missing, I re-attach.

ChrisCF · Post by **ChrisCF** » 18 Jul 2004 16:16

I still don't see it. You have to hit the "Add attachment" at the bottom before you post

oliver · Post by **oliver** » 18 Jul 2004 16:19

ChrisCF wrote:I still don't see it. You have to hit the "Add attachment" at the bottom before you post

I figured it out : )

it was tar.bz2 which isnt' allowed?! and it doesn't warn you about an illegal extension.
It's there now.

P.S.
Installing my VMWare on this machine so I can make the w32 port work with mingw aswell.

Hellfire · Post by **Hellfire** » 18 Jul 2004 19:03

I am testing the program right now on my Radeon 9600 powered laptop. It looks nice, and it doesn't seem to use much cpu power (current cpu usage: 0.3%)

And the very futuristic sound effect on the left and the right speaker when you click the mouse

is really... umm... is "spiffy" a good word?

I haven't looked at the code yet though...

But I wonder, why haven't you used the audio library included with SDL?

oliver · Post by **oliver** » 18 Jul 2004 19:08

Hellfire wrote:I am testing the program right now on my Radeon 9600 powered laptop. It looks nice, and it doesn't seem to use much cpu power (current cpu usage: 0.3%)

And the very futuristic sound effect on the left and the right speaker when you click the mouse is really... umm... is "spiffy" a good word?

I haven't looked at the code yet though...

But I wonder, why haven't you used the audio library included with SDL?

cos it was too much work, do all sorts of fancy mixing stuffs, and then ... why? I mean we are making a 3D game, so it kinda does need 3D sound effects.
OpenAL is to audio what OpenGL is to video. I know this wasn't 'discussed' before but We can do that in our next meeting : )

It _IS_ a cross platform library and it _IS_ used throughout quite some titles like Unreal, Unreal 2k3, Unreal 2k4, Harry Potter game, America's army etc etc. http://www.openal.org/titles.html has a bit longer list of titles, but I'm sure there plenty more.
It is supported by nVidia aswell as Creative labs.

Hellfire · Post by **Hellfire** » 18 Jul 2004 19:43

Don't worry, I have no objections

I was just wondering why you used another library

charlieg · Post by **charlieg** » 19 Jul 2004 00:24

ChrisCF · Post by **ChrisCF** » 19 Jul 2004 11:16

As a guide, posts consisting of nothing but a smiley are considered spam. ...

Hellfire · Post by **Hellfire** » 19 Jul 2004 16:19

Come on, Chris... Let it go

oliver · Post by **oliver** » 20 Jul 2004 02:29

I updated the attachment instead of creating a new one to keep the first post nice, clean and updated.

I tested it here in my VMWare and everything seemed O.K.

I don't really like the way w32 deals with openAL but i think that we might init al this 'manual' way ourselfs anyhow because that would mean we could skip the entire alut lib out (Use SDL for file loading etc which is nicer and more platform independed) and keep everything more equal that way. Also I belive that SDL should init OpenAL anyhow, maybe in SDL2 will take care of that ...

(The reason that would make sense is glut was replaced by SDL so alut should be replaced by SDL aswell, keeps everything nice and orderly AND possibly faster with less dependancies)

charlieg · Post by **charlieg** » 20 Jul 2004 23:32

ChrisCF wrote:As a guide, posts consisting of nothing but a smiley are considered spam. ...

I hear ya. Tho' this was an exceptional circumstance. I'm sure you, of all people, can appreciate that.

charlieg · Post by **charlieg** » 20 Jul 2004 23:35

oliver wrote:I updated the attachment instead of creating a new one to keep the first post nice, clean and updated.

The version number seems to be the same.

As a rule of thumb, if there is any code difference the version number should change. Even if it's just to add an extra letter or number to show how minor the change is. (e.g. 0.0.1a or something similar.) Otherwise, there's lots of potential for confusion. Obviously this isn't really important just now and there's little to be confused about, but good habits etc etc.

Of course, if there is no code difference between the update and the previous upload then just ignore this post.

oliver · Post by **oliver** » 21 Jul 2004 20:49

charlieg wrote:
oliver wrote:I updated the attachment instead of creating a new one to keep the first post nice, clean and updated.
The version number seems to be the same.

As a rule of thumb, if there is any code difference the version number should change. Even if it's just to add an extra letter or number to show how minor the change is. (e.g. 0.0.1a or something similar.) Otherwise, there's lots of potential for confusion. Obviously this isn't really important just now and there's little to be confused about, but good habits etc etc.

Of course, if there is no code difference between the update and the previous upload then just ignore this post.

There is no code difference, a makefile for windows was added, that be all : )

So people who donwloaded it before, and used it in linux, will have 100% identical binaries. I did this purposly and not change the version number for that specific reason.

Zuu · Post by **Zuu** » 24 Jul 2004 21:13

After I Installed OpenAL, I could sucessfuly compile your demo. However when I ran

Code: Select all

$ ./TechDemo

I got the following output, and then the application terminated with no delay.

Code: Select all

Initializing SDL.
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Video mode set failed: Couldn't find matching GLX visual

Probably I have done something wrong, or not done somthing that I shuld do. I have checked with my own aplications that SDL work, so that cant be the problem. A problem can be that trident microsystems not toshiba provides any linux drivers for my graphics card, which have low support for 3D.

I hope I distrube the maby ongoing discussion in this thread. (have been away for 3 weeks)

Hellfire · Post by **Hellfire** » 24 Jul 2004 21:53

Try running glxinfo. Find a line that says "Direct rendering:"

If it says "no", (and I think it will) then you don't have the openGL extensions installed in your X-server.

Try finding a line in your xf86config file that says #Loadmodule "GLX" and remove the #.

Restart the X-server and try again

Zuu · Post by **Zuu** » 24 Jul 2004 22:08

Thanks Hellfire. With your advice it worked fine.

oliver · Post by **oliver** » 24 Jul 2004 22:48

wether glxinfo says yes or no shouldn't matter I think. Direct or indirect rendering only indicates wether the actual hardware is going to be used for accelerated rendering. However you do need the GLX (openGL eXtensions) for you X server to be able to use _any_ form of openGL (hard or software based)

however as always, I could be wrong : )

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TechDemo 0.0.1 (Linux and W32 users! )

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