I've writen a program to give people seisures

Miscellaneous Topics
#1

http://members.optusnet.com.au/ksaho/krunosStupidBehaviour/seisure.jar

My first fragment program.
Damn this was so easy to do.

I think my brain is waking up this time of the year. I learnt how to use and create vertex and fragment programs within 15 minutes.
After I understood it, I’ve basically decided to use display lists in conjunction with shaders so I don’t have to depend on display lists to do all the fancy stuff, just to do basic framework. It also saves memory.

My only issue now is how would I pack JOGL files with my app and have my app rely on them?

#2

Eh? Please elaborate…

#3

Include nothing but the position of verices within the display list.
Colour manipulation and everything else is done through shaders.

#4

Hm… I downloaded JOGL 'n stuff, gave your program a try, and well, it’s just a fullscene quad with random colors… bit disappointed here.

For everybody wondering what the shader code was:


void main(),
{
   gl_FragColor = gl_Color;
}

And your rendering-code:


gl.glUseProgramObjectARB(shaderProgram);
		
gl.glColor3f
(
	(float)Math.random(),
	(float)Math.random(),
	(float)Math.random()
);
gl.glCallList(triangle);

So…

[quote]Colour manipulation and everything else is done through shaders.
[/quote]
is not true. And yes, not including the color in the displaylist saves video-memory… maybe 6 bytes.

From a technical point it’s great that you found out how to use shaders. It took me a little longer than 15 minutes as LWJGL documentation was a bit outdated :slight_smile: So you can be proud of what you achieved, but the demo-app wasn’t really worth the try :stuck_out_tongue:

#5

[quote]is not true.
[/quote]
How so? I thought GL Slang has access to variables such as gl_color which are built in?

#6

If you want a vertex/fragment program that reimplements what the basic opengl rendering already does (per vertex lighting, multitexture support, alpha clipping, and fog… and possibly some more things I forgot about), it’s going to be quite a bit more work than just a color-passthrough fragment shader.

But good job getting started. =) Shader programs are fun.

#7

Okay guys, sorry about that.

I’ve fixed my proggie and have a new link.

http://members.optusnet.com.au/ksaho/krunosStupidBehaviour/seisure.zip