gl4java-usergroup

[gl4java-usergroup] Stereo Update, and Fullscreen Problems

[Graeme H. <hum...@ur...>]

So,

I discovered that NVidia's stereoscopic drivers only function when your 
opengl/d3d app is in fullscreen mode. Now, I've been able to get the 
fullscreen Gear demo from the FAQ running (after a little tweaking and a 
call to device.setFullScreenWindow(mainFrame);, but it doesn't appear to 
be the "right" kind of fullscreen for NVidia's drivers to start working 
properly.

I would guess that the drivers expect that the opengl rendering area 
cover the fullscreen in the normal GLUT/whatever manner before they'll 
take over and allow me to use their stereoscopic functions... however, I 
see no way to do that using GL4Java. Any ideas?

Graeme Humphries

[gl4java-usergroup] Linking error

[Torsten W. <tor...@ho...>]

Hi @all,

while trying to compile the libraries for GL4Java I got the following 
linking error:

--------------------Configuration: GL4JavaJauGljJNI13 - Win32 
Release--------------------
Linking...
   Creating library ../libs/GL4JavaJauGljJNI13.lib and object 
../libs/GL4JavaJauGljJNI13.exp
OpenGLU_JauJNI12_funcs.obj : error LNK2001: unresolved external symbol 
_FreeArrays
OpenGLU_JauJNI12_funcs.obj : error LNK2001: unresolved external symbol 
_RegisterArray
../libs/GL4JavaJauGljJNI13.dll : fatal error LNK1120: 2 unresolved externals
Error executing link.exe.

GL4JavaJauGljJNI13.dll - 3 error(s), 0 warning(s)

Any suggestions?

ciao torsten

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[gl4java-usergroup] RE : texture compression

[Alban C. <aco...@wa...>]

Shouldn't you be testing glTestProc("glCompressedTexImage2DARB")?

Ah yes, that's the point. I didn't figure out about the "gl" prefix.

Texture compression does work fine ! :)

Many thanks

Alban

[gl4java-usergroup] Problems Enabling Stereo Mode

[Graeme H. <hum...@ur...>]

Let's just preface this by saying that I've just started using GL4Java, 
(and GL in general for that matter), so chances are I'm just missing 
something small and stupid. With that being said, here's my problem:

I'm attempting to create a program that uses the stereoscopic 
capabilities of my setup (Geforce3, NVidia drivers, DTI 2015XLS 3d 
display). I've tested the provided programs with the display, and a 
couple of D3D and OpenGL apps, and the stereoscopic mode seems to work 
fine in them. However, I can't get a stereoscopic canvas using GL4Java. :(

I've basically just taken Roman Podobedov's simple rotating cube applet, 
and I'm trying to get it to display in stereo mode. I've added 
stereoView = true; to his canvas' preinit, and done the following in the 
main applet when creating to canvas to try and ensure that it is at 
least stereo capable:

        GLCapabilities Settings = new GLCapabilities();
        System.out.println("Requiring stereoscopic capabilites...");
        Settings.setStereo(true);
        glmain = new MainGL(Settings, 640, 480); // Create our GL object

However, upon checking capabilities after, it has not been created 
stereoscopic capable. I'm not really sure where the proper place is to 
even be doing this, so I figured I'd better ask.

Any suggestions are greatly appreciated.

Graeme

[gl4java-usergroup] Re: texture compression

[Kenneth B. R. <kbr...@al...>]

> If I test for extension availability with glVertexArrayRangeNV, I get :
> GLINFO: glVertexArrayRangeNV (1): loaded !
> 
> If I test for extension availability with CompressedTexImage2DARB, I get
> :
> GLINFO: CompressedTexImage2DARB (3): not implemented !

Shouldn't you be testing glTestProc("glCompressedTexImage2DARB")?

> This page http://www.3dnature.com/glbench.html reports
> ARB_texture_compression is available with any kind of Geforce 2 though.
> 
> Is there any possibility the extension could not have been mapped with
> gl4java ?

If the method is present in GLFunc then C2J generated a wrapper
for it. The only remaining questions are whether the dynamic
lookups succeeded at startup and whether you're passing in the
correct argument to glTestProc.

[gl4java-usergroup] texture compression

[Alban C. <aco...@wa...>]

Hi Kenneth,

Thanks for the tip. Unfortunately, it doesn't work ! :)

If I test for extension availability with glVertexArrayRangeNV, I get :
GLINFO: glVertexArrayRangeNV (1): loaded !

If I test for extension availability with CompressedTexImage2DARB, I get
:
GLINFO: CompressedTexImage2DARB (3): not implemented !

This page http://www.3dnature.com/glbench.html reports
ARB_texture_compression is available with any kind of Geforce 2 though.

Is there any possibility the extension could not have been mapped with
gl4java ?

Regards,

Alban

Re: [gl4java-usergroup] texture compression

[Kenneth B. R. <kbr...@al...>]

> Calling GLContext.gljTestGLProc("GL_ARB_texture_compression", false)
> returns always false.

gljTestGLProc does a dlsym() underneath, so the argument you
should pass to it should be the actual OpenGL function name,
probably "glCompressedTexImage2DARB". Ensure all of the functions
you need are present. It currently special-cases the NVidia
memory allocation routine for vertex_array_range, exposing it as
glAllocateMemoryNV instead of wglAllocateMemoryNV /
glXAllocateMemoryNV. See demos/NVidia/VertexArrayRange for
example usage.

[gl4java-usergroup] texture compression

[Alban C. <aco...@wa...>]

Has anyone sucessfully used ARB texture compression with gl4java ?

I'm running a geforce 2 MX and my board reports it is not available when
using gl4java, while Nvidia developer site has papers on implementing
ARB texture compression on geforces.

Calling GLContext.gljTestGLProc("GL_ARB_texture_compression", false)
returns always false.

Same for :

GL_COMPRESSED_RGB_ARB

GL_COMPRESSED_RGBA_ARB

GL_COMPRESSED_ALPHA_ARB

GL_COMPRESSED_LUMINANCE_ARB

GL_COMPRESSED _LUMINANCE_ALPHA

 

Anyone have an idea ?

 

Sven ?

[gl4java-usergroup] Flicker problem

[Otto L. <ott...@ya...>]

Whenever the "GLCanvas" looses focus to the
Button widget the canvas flicker. 
Does anyone know how to get around this problem?
The code follows below.
My platform is Linux (NVidia).

Regards


import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import gl4java.*;
import gl4java.awt.*;
import gl4java.drawable.*;
import gl4java.utils.glut.*;

public class testgl {
    
    GLCanvas glc;
    void test() {
	JFrame f= new JFrame();
	glc= new GLCanvas(200,200);

	f.setSize(800,600);


	f.getContentPane().setLayout(new
BorderLayout());

	f.getContentPane().add(new JButton("Foo"),
BorderLayout.EAST);
	f.getContentPane().add(glc, BorderLayout.CENTER);


	f.addWindowListener(new WindowAdapter() {
		public void windowClosing(WindowEvent e) {
		    glc.cvsDispose();
		    System.exit(0);
		}
	    });

	f.show();
    }

    public static void main(String arg[]) {
	(new testgl()).test();
    }


}

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[gl4java-usergroup] gl4java.framework for the MacOS X port updated

[gerard z. <gzi...@ma...>]

hi guys,

those of you you had problems using gl4java in Swing apps on MacOS X 
might want to grab the new version. i also added extra error spewage to 
make debugging easier in case gl4java fails to attach to a window.

grab it here <http://www.gerardziemski.com/projects/>


cheers

[gl4java-usergroup] Need more memory

[Tomas K. <kar...@ag...>]

Hi

How do I extends the jvm memory in the applettag ?

Normaly I use the applet viewer with -J-Xmx extension
   ->  appletviewer Test.html -J-Xmx200m


How do I add that extra info in an applettag ?
<applet .......> </applet>

Cheers
Tomas

[gl4java-usergroup] pngtextureloader alpha

[Michael L. <Mic...@jo...>]

Hi everyone!

Does anyone know how to load RGBA images using PNGTextureLoader? It does not
seem to recognize the format...

If not - can anyone point me to how i can manually insert the alpha values
or some similar technique...

--Michael

[gl4java-usergroup] RE: Picking problem

[Alban C. <aco...@wa...>]

>Hi all,
>
>I've been playing with picking and started with the Red Books picking
>example. (the one with a grid of different color squares and the square
>changes color when you click it.)
>
>However, when I call the picking code, and use:
>
>hits =3D gl.glRenderMode(GL_RENDER);
>
>hits is always 0. I've searched the archives and no one else seems to
>have this particular problem, so I must be doing something rather dumb.
>I've included the two source files. Any help would be greatly
>appreciated.
>
>--Mark

Hi Mark,

I personnaly had no problems implementing picking and it works
perfectly, though I've had the same behaviour (hits return 0) when
implementing the picking on quads.

This is not a gl4java bug nor a MS JVM bug, but a general OpenGL
problem.
Strangely, OpenGL in ANY implementation is unable to pick quads in ortho
mode. I assume this could be because picking implementation could be
tightly dependant of the depth buffer, and the depth buffer could be
somewhat limited/uncompatible in ortho mode.=20

To be able to pick quads (or any 2D elements), you have to implement
color picking, as stated in the OpenGL faq
http://www.opengl.org/developers/faqs/technical/selection.htm, section
20.010

I did it and it works perfectly, though the help on its implementation
in the OpenGL faq is very uncomplete and confuse.
The strategy is to draw your quads in an offscreen buffer that cannot be
seen by the user, assigning each quad  a unique color that you record as
an integer value in an hashtable, associated with your quad name. (I
personnaly took pure red, as an integer value between 0 and 255 wich
allows me to have 256 unique colors. To be able to pick more objects,
you can add a green and a blue value, allowing you to pick up to 16
Million objects). In order to avoid your color to be corrupted by
openGL, you have to disable any component that might affect your color :
gl.glDisable(gl.GL_BLEND);
gl.glDisable(gl.GL_FOG);
gl.glDisable(gl.GL_LIGHTING);
gl.glDisable(gl.GL_TEXTURE_1D);
gl.glDisable(gl.GL_TEXTURE_2D);
gl.glDisable(gl.GL_TEXTURE_3D);
gl.glShadeModel(gl.GL_FLAT);

Whenever you perform a pick, you read the color of the pixel located
under the mouse using glReadPixels(). Once you have the color, you can
find out wich object it relates to by retrieving the name of the quad
associated as a pair with the integer value of the color in your
hashtable.

But before implementing color picking, you should try drawing 3D objects
with your current implementation (such as a cube, and not in ortho mode)
and your picking should work fine with these.

Regards,

Alban Cousini=E9

RE: [gl4java-usergroup] Picking problem

[Powell, M. A. <Mar...@ps...>]

My problem is not due to the IE JVM as I am using Sun's JVM. I'm not
attempting to make this work in a browser window, but an application.
Yet, I am still getting 0 hits. Any other ideas?

--Mark

-----Original Message-----
From: Sven Goethel [mailto:sgo...@ja...]=20
Sent: Thursday, August 01, 2002 8:40 AM
To: Nicolas PIEDELOUP; gl4...@li...
Subject: Re: [gl4java-usergroup] Picking problem

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Thursday 01 August 2002 14:34, Nicolas PIEDELOUP wrote:
> I have got this probleme too..
>
> Its seems to be a bug of the IE jvm.
> The applet work perfectly in netscape.
>
>
> You could try the picking demo on GL4Java site, it didn't work on IE
too.
>
> But maybe, with some patch it could work..
>

Well, IMHO, the MS JVM is _DEAD_ !

we shall not support this, and we should think
about dropping this crap in our next major release 3.y.z ...

tell your users to use the java jre instead ..

of course, you can find the "bug" and create a workaround
and send it to this group ... i may should integrate it ..

>
> Nico
>

cheers, sven

- --=20
health & wealth
mailto:sgo...@ja...
www   : http://www.jausoft.com ; pgp: http://www.jausoft.com/gpg/
voice : +49-521-2399440 ; fax : +49-521-2399442
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Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

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iEMHvg6+8mIpm1dKWFtIi94=3D
=3DMWK4
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Re: [gl4java-usergroup] Picking problem

[Sven G. <sgo...@ja...>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Thursday 01 August 2002 14:34, Nicolas PIEDELOUP wrote:
> I have got this probleme too..
>
> Its seems to be a bug of the IE jvm.
> The applet work perfectly in netscape.
>
>
> You could try the picking demo on GL4Java site, it didn't work on IE too.
>
> But maybe, with some patch it could work..
>

Well, IMHO, the MS JVM is _DEAD_ !

we shall not support this, and we should think
about dropping this crap in our next major release 3.y.z ...

tell your users to use the java jre instead ..

of course, you can find the "bug" and create a workaround
and send it to this group ... i may should integrate it ..

>
> Nico
>

cheers, sven

- -- 
health & wealth
mailto:sgo...@ja...
www   : http://www.jausoft.com ; pgp: http://www.jausoft.com/gpg/
voice : +49-521-2399440 ; fax : +49-521-2399442
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

iD8DBQE9SVZdHdOA30NoFAARAo4sAJsEmC1AD+d5qDBrhQTSqlIA0+usTQCeJfGf
iEMHvg6+8mIpm1dKWFtIi94=
=MWK4
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RE: [gl4java-usergroup] Picking problem

[Nicolas P. <NPI...@kl...>]

I have got this probleme too..
 
Its seems to be a bug of the IE jvm.
The applet work perfectly in netscape.
 
 
You could try the picking demo on GL4Java site, it didn't work on IE too.
 
But maybe, with some patch it could work..
 
 
Nico 

-----Original Message-----
From: Powell, Mark A. [mailto:Mar...@ps...]
Sent: Wednesday, July 31, 2002 9:23 PM
To: gl4...@li...
Subject: [gl4java-usergroup] Picking problem



Hi all,

 

I've been playing with picking and started with the Red Books picking
example. (the one with a grid of different color squares and the square
changes color when you click it.)

However, when I call the picking code, and use:

 

hits = gl.glRenderMode(GL_RENDER);

 

hits is always 0. I've searched the archives and no one else seems to have
this particular problem, so I must be doing something rather dumb. I've
included the two source files. Any help would be greatly appreciated.

 

--Mark

[gl4java-usergroup] back again ..

[Sven G. <sgo...@ja...>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

dear users,

hopefully at the end of this week i have finished 
my relocation to my new home.

so i hope to have time again to help gl4java getting better.

i will upload the current binaries to sourceforge now (by CVS sources), 
so check them out in some hours if you like ..

later more ..

cheers, sven
- -- 
health & wealth
mailto:sgo...@ja...
www   : http://www.jausoft.com ; pgp: http://www.jausoft.com/gpg/
voice : +49-521-2399440 ; fax : +49-521-2399442
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Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

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hjc+VGNB9wSEythDWgzQbZg=
=Fqnb
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[gl4java-usergroup] Binary realse ?

[Tomas K. <kar...@ag...>]

Will there be any new binary realse of GL4Java ?

// Tomas

Re: [gl4java-usergroup] GL ERROR : invalid value

[max g. <gi...@im...>]

Hi!

This kind of error is sometimes hard to debug :-) 
Your trace does not contain any indication of where the error has occured.
Try to isolate the problem to single OpenGL command by putting more checks
in your code (check every GL command if needed while debugging).

Max

[gl4java-usergroup] GL ERROR : invalid value

[guillaume D. <gui...@ne...>]

Hi!

i have - another - problem with OpenGL for Java.
when i execute my program, i receive the following error message:

guillaume@fallen:~/racine/devel/java/gl/src$ j1 GLTest
GL ERROR : invalid value
GL ERROR : 1281 == 0x501
java.lang.Exception
        at gl4java.GLContext.gljCheckGL(GLContext.java:2249)
        at gl4java.awt.GLCanvas.display(GLCanvas.java:796)
        at gl4java.awt.GLCanvas.sDisplay(GLCanvas.java:715)
        at gl4java.awt.GLCanvas.paint(GLCanvas.java:522)
        at sun.awt.RepaintArea.paint(RepaintArea.java:177)
        at sun.awt.motif.MComponentPeer.handleEvent(MComponentPeer.java:374)
        at java.awt.Component.dispatchEventImpl(Component.java:3658)
        at java.awt.Component.dispatchEvent(Component.java:3439)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
        at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:
197)
        at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:15
0)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)

what means this kind of error?

for those who want to read the code, it's here:
http://www.freenopen.net/~guillaume/fr/prog/gl4java/affiche/GLTestCan.java
http://www.freenopen.net/~guillaume/fr/prog/gl4java/affiche/GLTestGraphicGL.java
i think the error is in these files...
does it have someting to do with the canvas?

thank you for your help,

-- 
guillaume

[gl4java-usergroup] multitexturing and gl4java

[Torsten W. <tor...@ho...>]

Hi @all,

is multitexturing supported by gl4java? Due to my tests I would say NO!!! 
Has someone another opinion?


ciao torsten

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[gl4java-usergroup] RE: Overriding the 'Exit' button...

[Powell, M. A. <Mar...@ps...>]

I don't' have a gljfree call in my display method, or anywhere in the
program for that matter. In fact, I noticed I NEVER use any glj methods
and am wondering if this is my problem? Here's a snapshot of the display
method:

public void display(GLDrawable gld) {
		gl.glLoadIdentity();
       =20
        Vector3d pos =3D camera.getPosition();
        Vector3d view =3D camera.getView();
        Vector3d up =3D camera.getUp();
        glu.gluLookAt(pos.x, pos.y, pos.z, view.x, view.y, view.z, up.x,
up.y, up.z);

		//Clear The Screen And The Depth Buffer
		gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

		library.drawSimpleTerrain(gld, terrain);
		entityRenderer.renderEntities();
	}

Thanks,
Mark

-----Original Message-----
From: Nadeige - shouting fish [mailto:ni...@sh...]=20
Sent: Thursday, July 25, 2002 3:22 PM
To: Powell, Mark A.; gl4...@li...
Subject: Overriding the 'Exit' button...

>The dialog works, hitting yes closes the application while no just
>closes the dialog... however, as soon as I hit the 'X' button of the
>Frame, I get:
>
>gljDestroy failed (free) and the canvas no longer renders.

removing your call to gljfree() at the end of your display() method
should
prevent the message  gljDestroy failed (free)  to appear.

to quit your application, call System.exit(0) when the "no" button is
hit.

Regards,

Alban

[gl4java-usergroup] Overriding the 'Exit' button...

[Nadeige - s. f. <ni...@sh...>]

>The dialog works, hitting yes closes the application while no just
>closes the dialog... however, as soon as I hit the 'X' button of the
>Frame, I get:
>
>gljDestroy failed (free) and the canvas no longer renders.

removing your call to gljfree() at the end of your display() method should
prevent the message  gljDestroy failed (free)  to appear.

to quit your application, call System.exit(0) when the "no" button is hit.

Regards,

Alban

[gl4java-usergroup] Overriding the 'Exit' button...

[Powell, M. A. <Mar...@ps...>]

Hi all,

=20

I have a canvas with a GLEventListener associated with it. This canvas
is inside a AWT.Panel, which is inside a AWT.Frame. I overrode the
default window listener with the following:

-------

app.addWindowListener(new WindowAdapter() {

            public void windowClosed(WindowEvent e) {

            }

            public void windowClosing(WindowEvent e) {

                ExitDialog exitDialog =3D new ExitDialog(app, "Are you
sure?");

            }

        });

--------

=20

where ExitDialog extends AWT.Dialog. The hope was the put the basic: Are
you sure? Yes No. Dialog for closing.=20

=20

The dialog works, hitting yes closes the application while no just
closes the dialog... however, as soon as I hit the 'X' button of the
Frame, I get:=20

gljDestroy failed (free) and the canvas no longer renders.

=20

Is canvas listening to the window closing event as well? How do I fix
this?

=20

Thank you,

Mark

=20

Re: [gl4java-usergroup] Model Loaders

[Drake W. <dr...@er...>]

i'm using CyberVRML97.  It parses a x3d, wrl, 3ds, dfx, obj and nff so =
you should be able to use it

I've only used the .wrl file format myself.... and I only use the =
parsers (none of his other code since it uses java3d)

The object structure isn't all that great in my mind.  but thats =
probably just because I'm dealing with simple files and don't
need all the extra options...  But it's not all that bad.  I had to =
write some sample code to get all the objects down.

But after all that, I could have parsed the wrl files myself... but =
now... I can load all the others.. If I ever need

http://www.cybergarage.org/vrml/cv97/cv97java/index.html
  ----- Original Message -----=20
  From: Powell, Mark A.=20
  To: gl4...@li...=20
  Sent: Monday, July 22, 2002 11:15 AM
  Subject: [gl4java-usergroup] Model Loaders


  -->=20
  Is there any repositories out there of 3D Model Loaders, similar to =
Java3D's? Specifically I am looking for a OBJ loader. Or am I just going =
to have to bite the bullet and write it myself?



  Thanks,

  Mark