gl4java-usergroup

[gl4java-usergroup] Refreshing problem after window overlaping with GL4 mac.

[Jean-Yves B. <jea...@wa...>]

Hello,

1st step : my GL4 window is overlaped once by another window
that come front of it.

2nd step : i put the GL4 window front.

3rd step : Only the part that was overlapped is refreshed with sDisplay.

To go back to normal, I need to resize the frame.

Is it any other solution  please ?

NB: I use MyCanvas extending GL4 Anim canvas,
in a MyApplet extending JApplet, in MyFrame extending JFrame.

This problem don't seems to occur on PC platform.

Thanxs.

-------------------------
Jean-Yves BRUD - Palahou 31330 Larra - FRANCE
mailto: jea...@wa...

Re: [gl4java-usergroup] Small change in GL4J API needed

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

Max Gilead wrote:
> 
> Pontus Lidman wrote:
> 
> > Can't you just pass gl and glu as parameters to your rendering function?
> 
> I can and there's even simpler solution (public GLFunc gl; this.gl =
> super.gl). But I thought that if it is common that people must create
> workarounds for this, it would be good to change it. So I should have put
> 'proposal' not 'need' in previous' message subject line.
> 
> How do other people think? Sven?

Well, the protected access-specifier for the attributes :
	GLFunc gl
	GLUFunc glu
	GLContext glj
are provided, because of the "privacy" and "read only" for foreign
packages.
Well, I guess we can change protected -> public, 
if we do not want to save the attributes from writing by foreign
packages
- OR we can create a getGL(), getGLU() and getGLJ() method !

So, please make your vote !
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Re: [gl4java-usergroup] New GL4Java FAQ

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

Perfect

Great

Q: Same procedure like other projects ?
A: Same procedure like in all projects.

Well I will do my best ;-)

Sven
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[gl4java-usergroup] New GL4Java FAQ

[Max G. <gi...@li...>]

Hi!

Appended to this list is a new GL4Java FAQ. As you can see, there are
many uncertain and unanswered questions - if anyone knows (for
implementation details, I think Sven is the man who would be best to
answer), please let me know.

When it'll be corrected, I'll put it on web and I'll send announcements
to this list whenever an update will be made.

Of course, it's for everyone's profit, so new questions, answers and
corrections are HIGHLY NEEDED.

Bye,
Max

Re: [gl4java-usergroup] PNG on mac

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

Well - I guess you mean the package gl4java/utils/textures !

This depends on WHEN gerard ports the new version ...

BUT, you can download the png java library AND the gl4java*-jar.zip file
from jausoft.com,
where you have to put the png library into your classpath.
Then you have to extract the gl4java jar archiv and fetch the package
gl4java/utils/textures,
which must be put in your classpath either !

the png texture feature is 100% pure java.

Yours, Sven
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[gl4java-usergroup] PNG on mac

[Jean-Yves B. <jea...@wa...>]

I would like to try using png import on Mac.

I didn't found the java.utils.textures package.

Is it availble on mac.

Thanxs.


Jean-Yves

Re: [gl4java-usergroup] Font Support

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

I am very sorry for the delay.

But the font support within the next GL4Java version
will be done on the 6th February 2000 !

I am sorry for your inconvinience,
but I had some fine parties on the weekend
- so I had not enough time :-|

Yours, Sven

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Re: [gl4java-usergroup] Font Support

[Max G. <gi...@li...>]

Sven Goethel wrote:

> BTW: I miss some response about
>         - more demos / applications

I am still working on my application and GL viewport support class is
under development right now. It supports:
- fully configurable mouse-driven camera moving (5DOF - without roll, I
don't see it necessary)
- display modes (wifreframe/flat/lit...)
- lighting
- OO GL queries (returns arrays etc. - no need to create arrays
first...)
and more later.
It is intended to free programmer (myself at the moment :=) from all
setup work and should be subclassed by class performing actual rendering
only.

I think that I take GL4J FAQ and extend it somehow. Any other
volounteers? ;-)

Bye,
Max

Re: [gl4java-usergroup] Small change in GL4J API needed

[Max G. <gi...@li...>]

Pontus Lidman wrote:

> Can't you just pass gl and glu as parameters to your rendering function?

I can and there's even simpler solution (public GLFunc gl; this.gl =
super.gl). But I thought that if it is common that people must create
workarounds for this, it would be good to change it. So I should have put
'proposal' not 'need' in previous' message subject line.

How do other people think? Sven?


> The way I did it is I wrote a class that extends java.awt.Graphics that
> takes gl and glu as arguments to its constructor, and this new Graphics
> object is passed as argument to all my rendering functions.

Interesting idea. Does it allow to freely mix GL and AWT drawing (probably
drawing AWT on top of GL)? How about refreshing such a window?

Bye,
Max

[gl4java-usergroup] Re: debugging gljswap / Bug- and Problem Protocol

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

DEAR PAULSISK,

is this your name ? 
I do cc this response to the gl4java mailinglist.

Bug- and Problem Protocol
==========================
If sombody has a bug / problem,
please send a compileable piece (100-200 lines) of code,
which documents your problem !
Also send some information about the version (GL4Java, OS, OpenGL
renderer, ...) !

debugging gljswap 
==================
Well, "GLContext.gljSwap" calls its native method
"GLContext.gljSwapNative" which is defined 
e.g. in "CNativeCode/OpenGL_X11.c" or "CNativeCode/OpenGL_Win32.c" !
This function just calls glxSwapBuffers, or SwapBuffers, etc..

To be able to call "gljSwap", you must own a valid GLContext.
Please look into the demos and the docus (latex/html docu&java-api).

Example:
========

public void display()
{
	if(glj.gljMakeCurrent(true) == false)
	{
		return ; // error
	}

	/* your render stuff for one frame */

	glj.gljSwap();
	glj.gljFree();
}


paulsisk wrote:
> 
> I am developing an application using your gl4java package.  In one module
> i have the code working, but the other module is crashing on a call to
> gljswap.  I was wondering how I may debug through the source code of
> gljswap.  I downloaded the src code, but I cannot figure out how gljswap
> was implemented.  Any help you could provide would be appreciated.
> 
> thank you,
> 
> paulsisk
> email-> pau...@bi...

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[gl4java-usergroup] Font Support

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

Dear GL4Java Users,

because the work of Pontus Lidman (Mathcore),
the upcoming version will contain:
	- glut font support
	- simple java-font support

May be I am able to add the GLTT Font Renderer also.

I hope that this work could be done on the 31th January 2000 !

Thanxs, Sven

----------------

BTW: I miss some response about
	- GL4Java logo
	- Machine support for porting GL4Java on 'em
	- more demos / applications

;-)
any responses are **VERY** welcome 
8-|


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[gl4java-usergroup] Scalable font rendering

[Pontus L. <po...@ma...>]

Actually rendering of scalable fonts can be done pretty easily, if you're
not too concerned about quality. See the attached example.

By the way, does Java use TrueType fonts? If so, how can one get at the
extra rendering information necessary to render fonts at small sizes?

Regards,

Pontus

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Re: [gl4java-usergroup] Small change in GL4J API needed

[Pontus L. <po...@ly...>]

On Thu, 27 Jan 2000, Max Gilead wrote:

> Hi!
> 
> In my application I need variables gl and glu in GLCanvas public instead
> of protected. It is needed for remote rendering possibilities - for
> example:
> 
> //class in package opengl
> public class GLViewport extends GLCanvas
>     {
>     private ClassThatDrawsObjects ctdo;
> 
>     public void display()
>         {
>         //setup
>         ctdo.drawMyself(this);
>         }
>     }
> 
> //class in package geometry
> public class ClassThatDrawsObjects
>     extends SomeOtherNeededClass
>     {
>     public void drawMyself(GLViewport viewport)
>         {
>         viewport.gl.glBegin(viewport.GL_TRIANGLES);
>             viewport.gl.glVertex*(...);
>             ...
>         viewport.gl.glEnd();
>         }
>     }
> 
> so when program reaches display() method it calls method drawMyself() in
> some other class and this class performs rendering (it needs GLFunc to
> do so). Have I made myself clear? :-)
> 
> Is there any better way to do so? I need this because in my modeler I
> want each object to draw itself.

Can't you just pass gl and glu as parameters to your rendering function?
The way I did it is I wrote a class that extends java.awt.Graphics that
takes gl and glu as arguments to its constructor, and this new Graphics
object is passed as argument to all my rendering functions. 

The reason I decided to extend Graphics is just so that existing classes
written to render using pure JDK methods can now render OpenGL with no
changes ;)

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[gl4java-usergroup] Small change in GL4J API needed

[Max G. <gi...@li...>]

Hi!

In my application I need variables gl and glu in GLCanvas public instead
of protected. It is needed for remote rendering possibilities - for
example:

//class in package opengl
public class GLViewport extends GLCanvas
    {
    private ClassThatDrawsObjects ctdo;

    public void display()
        {
        //setup
        ctdo.drawMyself(this);
        }
    }

//class in package geometry
public class ClassThatDrawsObjects
    extends SomeOtherNeededClass
    {
    public void drawMyself(GLViewport viewport)
        {
        viewport.gl.glBegin(viewport.GL_TRIANGLES);
            viewport.gl.glVertex*(...);
            ...
        viewport.gl.glEnd();
        }
    }

so when program reaches display() method it calls method drawMyself() in
some other class and this class performs rendering (it needs GLFunc to
do so). Have I made myself clear? :-)

Is there any better way to do so? I need this because in my modeler I
want each object to draw itself.

Comments? Sven, how do you think?

Max

[gl4java-usergroup] gluSphere

[Byron L. H. <by...@in...>]

Does anyone have any tips/examples for using textures on quadrics, =
specifically gluSphere's?

Thanks!

Re: [gl4java-usergroup] Font rendering

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

I would prefere to see the GLTT library
for TrueType-Font rendering being implemented ;-)
May be I will find some time sometimes to implement.

Really, these fonts looks much better ...

Anyway, I allready checked the GLUT header files
and I found some complications to make it portable 
to all platforms (windows / unix).

I would love to see your results.

Sven

Pontus Lidman wrote:
> 
> Hello,
> 
> I need font rendering for my application, so I would like to see the GLUT
> functions to render fonts implemented in gl4java. In fact, I have already
> started to implement these missing GLUT functions. If anybody else has
> made any progress in this area, please notify me now so I don't duplicate
> existing work.
> 
> Regards,
> 
> Pontus
> 
> --
> Pontus Lidman, po...@ma..., Software Engineer
> No matter how cynical you get, it's impossible to keep up.
> Scene: www.dc-s.com | MUD: tyme.envy.com 6969 | irc: irc.quakenet.eu.org
> 
> _______________________________________________
> gl4java-usergroup mailing list
> gl4...@li...
> http://lists.sourceforge.net/mailman/listinfo/gl4java-usergroup

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[gl4java-usergroup] Font rendering

[Pontus L. <po...@ly...>]

Hello,

I need font rendering for my application, so I would like to see the GLUT
functions to render fonts implemented in gl4java. In fact, I have already
started to implement these missing GLUT functions. If anybody else has
made any progress in this area, please notify me now so I don't duplicate
existing work.

Regards,

Pontus

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Re: [gl4java-usergroup] Stencil buffers?

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

Pontus Lidman wrote:

> In the example stencil.c that comes with the Mesa distribution, there is
> an example of having an 8 bit stencil buffer. However, the example calls
> glutInitDisplay(GLUT_RGB|GLUT_SINGLE|GLUT_STENCIL), so I guess one must do
> some initialization, as you say with glEnable(GL_STENCIL). You could
> implement it the same way as the current "doubleBuffer=true", i.e.,
> "stencilBuffer=true" in the users' preInit() method.
> 
> Regards,
> 
> Pontus
> 

So this is a thing about display properties,
to being implemented within the X/GLX part - like STEREO_VIEW and
DOUBLE_BUFFERING ?!
This kind of initialisation is if course different to
glEnable(GL_STENCIL).

Well I will check this out next 28/29 Jan 2000 or 4/5 Feb 2000 !
Others are welcome to implement this piece of code.

Thanxs, Sven

> --
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> No matter how cynical you get, it's impossible to keep up.
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> 
> _______________________________________________
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Re: [gl4java-usergroup] Stencil buffers?

[Pontus L. <po...@ly...>]

On Wed, 26 Jan 2000, Sven Goethel wrote:

> Now I have tested the Method glGetIntegerv(GL_STENCIL_BITS,...) 
> with GL4Java Version 2.1.3.2 and:
> 
> 	- WinNT 4.0 + Matrox G200 OpenGL
>          	Stencil bits are 8
>          	Color bits are 5
> 	- WinNT 4.0 + NVidia GeForce256 + Elsa X2 OpenGL Driver
>          	Stencil bits are 0
>          	Color bits are 5
> 	- Linux + NVidia GeForce256 + NVidia GLX 1.2 Mesa 3.0 OpenGL Driver
>          	Stencil bits are 0
>          	Color bits are 5
> 	- Linux + Mesa 3.1 Soft OpenGL Driver
>          	Stencil bits are 0
>          	Color bits are 5
> 
> So I guess it is about the Stencil capabilities of the gfx-card and the
> driver.
> I guess the Method glGetIntegerv(GL_STENCIL_BITS,...) is OpenGL1.2 only
> - right ?
> Or should we enable Stencil with glEnable(GL_STENCIL...) ?
> 
> But it is not a bug in GL4Java !

In the example stencil.c that comes with the Mesa distribution, there is
an example of having an 8 bit stencil buffer. However, the example calls
glutInitDisplay(GLUT_RGB|GLUT_SINGLE|GLUT_STENCIL), so I guess one must do
some initialization, as you say with glEnable(GL_STENCIL). You could
implement it the same way as the current "doubleBuffer=true", i.e.,
"stencilBuffer=true" in the users' preInit() method.

Regards,

Pontus

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[gl4java-usergroup] Request for supporting GL4Java with hardware / software / machine access / porting

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

Dear GL4Java users,

I ask you, if you are able to support the GL4Java project
with hardware / software / machine access / porting !

We do need access to machines / OS, like:
	- IRIX (SGI)
	- Solaris
	- HP-UX
	- Macintosh
with the common OpenGL hardware/drivers !

If you are interesting in, and able to help porting GL4Java to these
platforms,
please let me know.

You can:
	- send me your hardware / software as a donation for the GL4Java work.
	  This request's purpose is NOT to make me rich ;-),
	  but I am not able to buy me all these machines ...

	- give me access to your machines via ssh (secure shell),
	  including access to your machines X-Server, to test your machines GLX
module.
	  ( I know that my GLX module (linux) runs very well ;-)

	- port GL4Java by yourself, test it with all the demos, and send me the
	  binaries !


Thanxs in advance !

Yours, Sven Goethel
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[gl4java-usergroup] Re: gl4java HP-UX Portierung

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

Let me translate his request (shortly):

> I must port my gl4java application to IRIX and HP-UX in the near future.
> Does there exists any actions, etc. to port GL4Java to these platforms ?

Well, 

the IRIX implementation is nearly done,
we (Lee Elson and Martin N Norton (webwinds / Nasa)) found out, 
that we need an own overlayed windowd on IRIX for double-buffering :-(
May be this not needed on all IRIX machines ...
I will add support for this in the GL4Java-GLX code in february.

HP-UX support was never tried, as far as I know.
I hope that there are no strange behaviors, like on IRIX.

Because I have neithe an IRIX nor an HP-UX machine, nor an MACintosh,
I need your help for porting - and I will help you either.
E.g. Gerard Gziemski is doing the port for Macintosh
and Lee Elson is doing the port for IRIX and Solaris.

In the next message, I will ask you for supporting me with machines ;-)

Yours, Sven

Erik Unger wrote:
> 
> Hi,
> 
> Ich muss meine gl4java Anwendung bald nach IRIX und HP-UX portieren.
> Gibt es bezüglich HP-UX schon irgendwelche Versuche/Bestrebungen,
> oder muss ich die Portierung alleine angehen ?
> 
> -Erik Unger

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Re: [gl4java-usergroup] Stencil buffers?

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

Now I have tested the Method glGetIntegerv(GL_STENCIL_BITS,...) 
with GL4Java Version 2.1.3.2 and:

	- WinNT 4.0 + Matrox G200 OpenGL
         	Stencil bits are 8
         	Color bits are 5
	- WinNT 4.0 + NVidia GeForce256 + Elsa X2 OpenGL Driver
         	Stencil bits are 0
         	Color bits are 5
	- Linux + NVidia GeForce256 + NVidia GLX 1.2 Mesa 3.0 OpenGL Driver
         	Stencil bits are 0
         	Color bits are 5
	- Linux + Mesa 3.1 Soft OpenGL Driver
         	Stencil bits are 0
         	Color bits are 5

So I guess it is about the Stencil capabilities of the gfx-card and the
driver.
I guess the Method glGetIntegerv(GL_STENCIL_BITS,...) is OpenGL1.2 only
- right ?
Or should we enable Stencil with glEnable(GL_STENCIL...) ?

But it is not a bug in GL4Java !

Yours, Sven		

Sven Goethel wrote:
> 
> I have testet gltest with:
>         WinNT 4.0
>         Jdk 1.2.2 & native threads & symantec jit
>         GL4Java 2.1.2.2 (current windows version)
> Output:
>         Stencil bits are 8
>         Color bits are 5
> 
> So it must be a GL4Java 2.1.3.0 on Unix with Mesa 3.0 bug !
> { Mesa 3.0 Software renderer ???)
> 
> I will check this for unix & mesa 3.1 this weekend !
> 
> Then I will put the new version for Mesa 3.1 online !
> 
> Yours, Sven
> 
> Pontus Lidman wrote:
> >
> > > Of course, GL4Java should support glGetIntegerv(GL_STENCIL_BITS,...) !
> > >
> > I didn't realize it was a bug, so I forgot some traditional bug-report
> > information. I have attached a java file showing the problem (0 bits in
> > stencil buffer).
> >
> > I use gl4java 2.1.3.0 on Linux 2.2.13 with JDK 1.2.2, glibc 2.1.2 and
> > Mesa 3.0.
> 
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Re: [gl4java-usergroup] Re: gl4java Manual

[<sl...@cc...>]

On Tue, 25 Jan 2000, Max Gilead wrote:

> sl...@cc... wrote:
> 
> >         I found that also.
> 
> Maybe you have some weird distribution of XFree? I'm not an expert here but AFAIK
> it's possible to compile X without SHM extension. Which Linux distribution you're
> using?
> 
> Max
> 
I'm using Linux Kernel 2.2.9 with XFree86 3.3.3.1 (Mandrake 6.0
distribution)

Steve 

Re: [gl4java-usergroup] Re: gl4java Manual install

[Max G. <gi...@li...>]

sl...@cc... wrote:

>         I found that also.

Maybe you have some weird distribution of XFree? I'm not an expert here but AFAIK
it's possible to compile X without SHM extension. Which Linux distribution you're
using?

Max

Re: [gl4java-usergroup] doCleanUp user.

[Max G. <gi...@li...>]

Jean-Yves BRUD wrote:

> 2- I have some memory problem using gljFree but it not easy to isolate
> the problem. It seem's to ocure when I create display list between
> display calls ...

Creating display lists _between_ display calls? Am I missing some important
information or GL calls can be made only when GL context is active - during
initialization, displaying and reshaping?

Max