csgl-users — General CsGL feedback list.

Re: [Csgl-users] tesselator how to?

[Lloyd D. <ll...@ga...>]

Christian I spot here 2 problems:
1st:
GL.gluTessCallback(tess, GL.GLU_TESS_BEGIN, new GLUtessBeginProc(OnTessBegin));
the delegate might be disposed, and you could have a NullSomethingException at a quite unexcpected time.
use either a GCHandle or, uh ... or something else....

2nd
I think there is a runtime mess with calling convention and an impossibility in C# to make things work as expected, in fact I get it up a while ago, sorry....
(I think OpenGL is expecting _cdecl function, whereas delegate are exported as _stdcall, no way to change that except by hacking the IL, ask Ridge, he might help .....)

[Csgl-users] tesselator how to?

[Christian B. <Ch...@be...>]

Hi, I'm trying to use the gluTesselator in CsGL but I'm somewhat confused
how to use it.
 
I am using the following code to tessellate (in my case a font glyph)
 
protected void GenerateText()
{
          CsGL.OpenGL.GLUtesselator tess = GL.gluNewTess();
          GL.gluTessCallback(tess, GL.GLU_TESS_BEGIN, new
GLUtessBeginProc(OnTessBegin));
          GL.gluTessCallback(tess, GL.GLU_TESS_VERTEX, new
GLUtessVertexProc(OnTessVertex));
          GL.gluTessCallback(tess, GL.GLU_TESS_END, new
GLUtessEndProc(OnTessEnd));
 
          GL.gluBeginPolygon(tess);
 
          GL.gluTessBeginContour(tess);
 
          foreach (CFreeTypeGlyph glyph in glyphs)
          {
                   double ratio = Math.Max(glyph.maxX, glyph.maxY);
                   for (int i=0; i<glyph.numPoints; i++)
                   {
                             int ix = glyph.points[i * 2];
                             int iy = glyph.points[(i * 2) + 1];
                             byte tag = glyph.tags[i];
                             double x = ix / ratio;
                             double y = iy / ratio;
 
                             double[] xy = { x, y };
                             GL.gluTessVertex(tess, xy, (IntPtr) 0);
                   }
          }
 
 
          GL.gluTessEndContour(tess);
          GL.gluEndPolygon(tess);
          GL.gluDeleteTess(tess);
}
 
Where my callbacks look like this...
 
public void OnTessBegin(uint type)
{
          GL.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL);
          GL.glBegin(GL.GL_POLYGON);
          GL.glEnable(GL.GL_TEXTURE_2D); // this one is added 
          GL.glNormal3d(0, 0, 1);
          GL.glColor4d(1.0,1.0,1.0,1);
}
 
public void OnTessVertex(IntPtr data)
{
          // PROBLEM - DATA IS NULL!!!!!!
          // THIS CODE WILL THROW
 
          double[] vertex = new double[3];
System.Runtime.InteropServices.Marshal.Copy(data, vertex, 0, 3);
          GL.glTexCoord2d(vertex[0], vertex[1]);
          GL.glVertex2d(vertex[0], vertex[1]);
}
 
protected void OnTessEnd()
{
          GL.glEnd();
}
 
When the tesselator calls my OnTessVertex function though the "data" param
is null.  I guess I'm just using the whole thing wrong but I don't know if
it's my lack of understanding of OpenGL or lack of understanding of C# or
maybe both (which I would not be surprised).
 
Any thoughts on what is wrong with my code please?
 
Thanks,
-chris
 
PS. CsGL Rocks!
 

[Csgl-users] (no subject)

[like g. <lik...@ho...>]

Hi,
I'm a newcomer to this mailing list. I am doing a simulation project using 
CsGL on .NET starting this week.

I have problem with displaying a full screen display. Everytime I resize the 
window, the graphics won't resize accordingly, eventhough I have set the 
glViewport() and gluOrtho2D() command appropriately. Besides, the rendering 
will only show a blank/transparent form window, unless I resize the window 
for the first time. After resizing, then only the first render of the 
graphics appear after some time. I wonder what's the cause of this.

Thanks a lot for any suggestion and help.

Like.

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[Csgl-users] gsl in picture box solution

[catu74 <ca...@ol...>]

I have a little code for using a picturebox with opengl, instead of 
using the form . If someone wants to know more about it, please send me 
an email to ca...@ol...
Thanks
Nacho

[Csgl-users] Need assistance

[Mike R. <mrl...@ya...>]

Hi,

   When I run the CSGL examples (version 1.4.1) the
form usually is blank, then when I change the forms
size the form shows the rendering, if I resize the
form it again becomes blank until I find an
appropriate size again. Why is this so ? what can the
problem be and what should I change in the code to fix
this problem??

Thanks   


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[Csgl-users] CsGl in Picturebox ****HELP****!!!

[Hblax <hb...@li...>]

Hi,
 All the examples I found in the internet make the render on the form, is it
possible to
redirect the render into a picturebox?

 Thank you

 Gian

O'Reilly ONDotNet.com article on CsGL (RE: [Csgl-users] CsGL, OpenGL, VB.Net)

[Ben H. <be...@ex...>]

Someone should like to this article from the main page of CsGL.  It's a
pretty decent article. 

All the best,
-ben houston
http://www.exocortex.org/3dengine


> -----Original Message-----
> From: csg...@li... [mailto:csgl-users-
> ad...@li...] On Behalf Of Jacek Artymiak
> Sent: Tuesday, April 29, 2003 2:00 PM
> To: csg...@li...
> Subject: [Csgl-users] CsGL, OpenGL, VB.Net
> 
> Hi,
> 
> "Using OpenGL with VB.NET," my article that describes how to get CsGL
to
> play nicely with OpenGL and VB.Net has been published here:
> 
> http://www.ondotnet.com/pub/a/dotnet/2003/04/28/opengl.html
> 
> Best,
> 
> Jacek
> 
> 
> -------------------------------------------------------
> This sf.net email is sponsored by:ThinkGeek
> Welcome to geek heaven.
> http://thinkgeek.com/sf
> _______________________________________________
> Csgl-users mailing list
> Csg...@li...
> https://lists.sourceforge.net/lists/listinfo/csgl-users

[Csgl-users] CsGl in Picturebox

[Hblax <hb...@li...>]

Hi,=20
All the examples I found in the internet make the render on the form, is =
it possible to redirect the render into a picturebox?

Thank you

Gian

[Csgl-users] CsGL, OpenGL, VB.Net

[Jacek A. <ja...@ar...>]

Hi,

"Using OpenGL with VB.NET," my article that describes how to get CsGL to 
play nicely with OpenGL and VB.Net has been published here:

http://www.ondotnet.com/pub/a/dotnet/2003/04/28/opengl.html

Best,

Jacek

[Csgl-users] Newbie

[Wade W. <egg...@ho...>]

I am new to using C#, and I am trying to work with OpenGL within C#.  I =
am working with Sharp Develop, and I can not seem to get it to find the =
CSGL DLL in my code.  Do I need to add it to the project in order for my =
"using" statements to work.  When I try to compile it tells me it can =
not find CSGL.  What do I need to do to get it to recognize the dll.

eggman

Re: [Csgl-users] GLOutlineFont - my working version.

[Plamen T. <pla...@ho...>]

Hi,
I try GLOutlineFont - great work!!! I am so expressed!!!

10x!!!

I have a question: Could I use special symbols , cyrillic and etc.?

Best wishes!!!

Plamen




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Re: [Csgl-users] multi-monitor support

[Jeff M. <jm...@ya...>]

I'll try it tomorrow.
Thanks. 

- Jeff

----- Original Message ----- 
From: <ll...@ga...>
To: "Jeff Ma" <jm...@ya...>
Cc: <csg...@li...>
Sent: Wednesday, April 09, 2003 8:04 PM
Subject: Re: [Csgl-users] multi-monitor support


> just a quick though ..
> what about doing the OpenGL drawing to a Bitmap, and then display the 
> bitmap (in an ImageBox ...) ?
> there is a sample showing how to draw to a bitmap here: 
> <csgl>/examples/CS/drawimage.cs
> 
> it's a bit slower than direct drawing though ...
> what do you think ?
> 
> On Thursday, April 10, 2003, at 11:26 AM, Jeff Ma wrote:
> 
> > I have one graphics card with two monitors.
> >
> > The problem is not related to csgl. It is OpenGL problem (thanks to 
> > Trent
> > M.)  OpenGL hw accelaration doesn't support multi-monitor. I tried Nehe
> > sample (C++/OGL), same problem: runs fine on 1st monitor, no update on 
> > 2nd
> > monitor. See opengl.org faq:
> > http://www.opengl.org/developers/faqs/technical/mswindows.htm#mswi0100.
> >
> > A software pixel format may solve this problem. But Microsoft's generic
> > pixel format also has bugs, it doens't draw correctly on child windows 
> > w/
> > double-buffer when resized, see
> > http://support.microsoft.com/default.aspx?scid=kb;EN-US;272222. Plus
> > software is slow.
> >
> > One promising solution is:
> > http://support.microsoft.com/default.aspx?scid=kb;EN-US;272221: OpenGL
> > renders to a DIB section (device-independent bitmap) and then blt to 
> > the
> > window. The GLDib example runs fine on my two monitors and hw 
> > accelerated. I
> > am not sure how difficult it is to add DIB support to Lloyd's code.
> >
> > Multi-monitor is very popular in the investment industry that I am 
> > writing
> > code for.
> >
> > Jeff Ma
> 

Re: [Csgl-users] multi-monitor support

[<ll...@ga...>]

just a quick though ..
what about doing the OpenGL drawing to a Bitmap, and then display the 
bitmap (in an ImageBox ...) ?
there is a sample showing how to draw to a bitmap here: 
<csgl>/examples/CS/drawimage.cs

it's a bit slower than direct drawing though ...
what do you think ?

On Thursday, April 10, 2003, at 11:26 AM, Jeff Ma wrote:

> I have one graphics card with two monitors.
>
> The problem is not related to csgl. It is OpenGL problem (thanks to 
> Trent
> M.)  OpenGL hw accelaration doesn't support multi-monitor. I tried Nehe
> sample (C++/OGL), same problem: runs fine on 1st monitor, no update on 
> 2nd
> monitor. See opengl.org faq:
> http://www.opengl.org/developers/faqs/technical/mswindows.htm#mswi0100.
>
> A software pixel format may solve this problem. But Microsoft's generic
> pixel format also has bugs, it doens't draw correctly on child windows 
> w/
> double-buffer when resized, see
> http://support.microsoft.com/default.aspx?scid=kb;EN-US;272222. Plus
> software is slow.
>
> One promising solution is:
> http://support.microsoft.com/default.aspx?scid=kb;EN-US;272221: OpenGL
> renders to a DIB section (device-independent bitmap) and then blt to 
> the
> window. The GLDib example runs fine on my two monitors and hw 
> accelerated. I
> am not sure how difficult it is to add DIB support to Lloyd's code.
>
> Multi-monitor is very popular in the investment industry that I am 
> writing
> code for.
>
> Jeff Ma

Re: [Csgl-users] multi-monitor support

[Jeff M. <jm...@ya...>]

I have one graphics card with two monitors.

The problem is not related to csgl. It is OpenGL problem (thanks to Trent
M.)  OpenGL hw accelaration doesn't support multi-monitor. I tried Nehe
sample (C++/OGL), same problem: runs fine on 1st monitor, no update on 2nd
monitor. See opengl.org faq:
http://www.opengl.org/developers/faqs/technical/mswindows.htm#mswi0100.

A software pixel format may solve this problem. But Microsoft's generic
pixel format also has bugs, it doens't draw correctly on child windows w/
double-buffer when resized, see
http://support.microsoft.com/default.aspx?scid=kb;EN-US;272222. Plus
software is slow.

One promising solution is:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;272221: OpenGL
renders to a DIB section (device-independent bitmap) and then blt to the
window. The GLDib example runs fine on my two monitors and hw accelerated. I
am not sure how difficult it is to add DIB support to Lloyd's code.

Multi-monitor is very popular in the investment industry that I am writing
code for.

Jeff Ma

----- Original Message -----
From: "Lloyd Dupont" <ll...@ga...>
To: <csg...@li...>
Sent: Wednesday, April 09, 2003 4:24 AM
Subject: Re: [Csgl-users] multi-monitor support


> that will not really help you but: I have no idea, nor multiples screens
..
> sorry ;-(
>
> I found this which seems to say you should have any problems ...
> http://www.opengl.org/developers/faqs/technical/window.htm
>
> however, do you have different video card for different screen ?
> an idea just come to my mind ...
> could you check if your Control is recreated when it cross screen boundary
?
> (you have HandleCreated/Destoyed event for this)...
>
> if yes a RecreateContext call on such event would probably help ...
>
> ----- Original Message -----
> From: "Jeff Ma" <jm...@ya...>
> To: <csg...@li...>
> Sent: Wednesday, April 09, 2003 2:48 AM
> Subject: [Csgl-users] multi-monitor support
>
>
> > Hi,
> >
> > If I drag my app (csgl) from one monitor to another, the OpenGLControl
is
> > not updating. gldraw doesn't produce anything.  How can I fix this? Do I
> > need to recreate some device on some events?
> >
> > Thanks for any help in advance.
> >
> > Jeff Ma
> >
> >
> >
> >
> > -------------------------------------------------------
> > This SF.net email is sponsored by: ValueWeb:
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> > _______________________________________________
> > Csgl-users mailing list
> > Csg...@li...
> > https://lists.sourceforge.net/lists/listinfo/csgl-users
>
>
>
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[Csgl-users] function pointer breakthrough

[Lloyd D. <ll...@ga...>]

I recently start a new opensource (and very small but usefull) project:
http://pfct4net.sourceforge.net/

It's purpose is to go beyond limitation of DllImportAttribute, calling =
any function pointer, and not only those returned by GetProcAddress() =
....

the next release of CsGL might drop extension support and advice you to =
use this library instead,
it's while I ask you some feedback and if it looks ok ?

cheers,
Lloyd

Re: [Csgl-users] Help: Problem with access to http://csgl.hyperboards2.com/

[Lloyd D. <ll...@ga...>]

Hi Plamen !

Well, we have a problem with it, it won't work anymore.
soon I will make a CsGL update and advocate the Sourceforge newsgroup which
are, in my opinion, the best option, so far. (you could also try th mailing
list, as now)

Anyway, as a preview, to access Sourceforge forums with outlook you should:

- being registered on sourceforge, and have a user login and password.
- create a new 'newsgroup account' with
    nntp.sourceforge.net as a server.
    select secure connection on the advanced tab
    enter you sourceforge login & password on server -> session setting

then loof for the following newsgroup
- sf.c.cs.cgsl.help
- sf.c.cs.csgl.open_discussion


----- Original Message -----
From: "Plamen Tonchev" <pla...@ho...>
To: <csg...@li...>
Sent: Wednesday, April 09, 2003 9:39 PM
Subject: [Csgl-users] Help: Problem with access to
http://csgl.hyperboards2.com/


>
>
>
> Hi everybody!
> I have problem with access to CSGL forum
>
> http://csgl.hyperboards2.com/ doesn't work.
>
> What's going on?
>
> Regards
> Platon
>
> _________________________________________________________________
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> http://join.msn.com/?page=features/virus
>
>
>
> -------------------------------------------------------
> This sf.net email is sponsored by:ThinkGeek
> Welcome to geek heaven.
> http://thinkgeek.com/sf
> _______________________________________________
> Csgl-users mailing list
> Csg...@li...
> https://lists.sourceforge.net/lists/listinfo/csgl-users

[Csgl-users] Help: Problem with access to http://csgl.hyperboards2.com/

[Plamen T. <pla...@ho...>]

Hi everybody!
I have problem with access to CSGL forum

http://csgl.hyperboards2.com/ doesn't work.

What's going on?

Regards
Platon

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Re: [Csgl-users] multi-monitor support

[Lloyd D. <ll...@ga...>]

that will not really help you but: I have no idea, nor multiples screens ..
sorry ;-(

I found this which seems to say you should have any problems ...
http://www.opengl.org/developers/faqs/technical/window.htm

however, do you have different video card for different screen ?
an idea just come to my mind ...
could you check if your Control is recreated when it cross screen boundary ?
(you have HandleCreated/Destoyed event for this)...

if yes a RecreateContext call on such event would probably help ...

----- Original Message -----
From: "Jeff Ma" <jm...@ya...>
To: <csg...@li...>
Sent: Wednesday, April 09, 2003 2:48 AM
Subject: [Csgl-users] multi-monitor support


> Hi,
>
> If I drag my app (csgl) from one monitor to another, the OpenGLControl is
> not updating. gldraw doesn't produce anything.  How can I fix this? Do I
> need to recreate some device on some events?
>
> Thanks for any help in advance.
>
> Jeff Ma
>
>
>
>
> -------------------------------------------------------
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> No other company gives more support or power for your dedicated server
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> _______________________________________________
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> Csg...@li...
> https://lists.sourceforge.net/lists/listinfo/csgl-users

Re: [Csgl-users] CsGL & VB.Net

[Lloyd D. <ll...@ga...>]

cool :-)

BTW I would probably make an update in a couple of week, with the following
things:

- I'm about to come with a very elegant and generic solution for extension
and, more generically, to call (most) C function pointer, using Emit API. I
will post it on the list as soon as it done to be beta tested ..

- I will add Ben's font code

- I will simplify Context/View relation and add a MultiThreadedControl in
the distribution


cheers,
Lloyd

----- Original Message -----
From: "Jacek Artymiak" <ja...@ar...>
To: <csg...@li...>
Sent: Wednesday, April 09, 2003 8:03 PM
Subject: [Csgl-users] CsGL & VB.Net


> I wrote a short article on getting CsGL and VB.Net to work
> together.  I'll let you know when my editor publishes it.
>
> Best Regards,
>
> Jacek Artymiak
> writer, author, developer, consultant --------------------
> member of the Board of the Python Business Forum ---------
> email: ja...@ar... / www: http://www.artymiak.com -
>
>
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> No other company gives more support or power for your dedicated server
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[Csgl-users] CsGL & VB.Net

[Jacek A. <ja...@ar...>]

I wrote a short article on getting CsGL and VB.Net to work
together.  I'll let you know when my editor publishes it.

Best Regards,

Jacek Artymiak
writer, author, developer, consultant -------------------- 
member of the Board of the Python Business Forum ---------
email: ja...@ar... / www: http://www.artymiak.com -

Re: [Csgl-users] GLOutlineFont - my working version.

[<ll...@ga...>]

Thanks, Ben,
I will add this.

BTW, I learn a bit of Emit and I hope to come out soon with a very 
clean solution for extension ...

On Wednesday, April 9, 2003, at 01:38 AM, Ben Houston wrote:

> I am sharing this information in the hopes that it can be included in a
> future version of CsGL.
>
>
> Here are the two files that make up my version of the GLOutlineFont
>
> http://www.exocortex.org/csgl/GLOutlineFont.cs
> http://www.exocortex.org/csgl/Win32Native.cs
>
> I make use of the GLOutlineFont class in the following way:
>
> (1) Inside InitGLContext I do the following:
>
>   _glFont = new GLOutlineFont( this.Context, new Font( "Arial", 15 ) );
>   _glFont.Init( Win32Native.GetDC( this.Handle ) );
>
> (2) Then to use this class to write a font to the screen I do the
> following inside the Paint() function:
>
>   _glFont.DrawString( "my String" );
>
> Hope that helps.
> -ben houston
> http://www.exocortex.org/ben
>
>
>
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> Csg...@li...
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>

[Csgl-users] multi-monitor support

[Jeff M. <jm...@ya...>]

Hi,

If I drag my app (csgl) from one monitor to another, the OpenGLControl is
not updating. gldraw doesn't produce anything.  How can I fix this? Do I
need to recreate some device on some events?

Thanks for any help in advance.

Jeff Ma

[Csgl-users] GLOutlineFont - my working version.

[Ben H. <be...@ex...>]

I am sharing this information in the hopes that it can be included in a
future version of CsGL.


Here are the two files that make up my version of the GLOutlineFont

http://www.exocortex.org/csgl/GLOutlineFont.cs
http://www.exocortex.org/csgl/Win32Native.cs

I make use of the GLOutlineFont class in the following way:

(1) Inside InitGLContext I do the following:

  _glFont = new GLOutlineFont( this.Context, new Font( "Arial", 15 ) );
  _glFont.Init( Win32Native.GetDC( this.Handle ) );

(2) Then to use this class to write a font to the screen I do the
following inside the Paint() function:

  _glFont.DrawString( "my String" );

Hope that helps.
-ben houston
http://www.exocortex.org/ben 

Re: [Csgl-users] CsGL and VB.NET

[Lloyd D. <ll...@ga...>]

well, I think so (perhaps)
when I did all of that I didn't understand what mean CLR compliant.
which my uint const ae not.
I wonder if typing all const from uint to int could help ..
(didn't tested it yet ..)

----- Original Message ----- 
From: "Jacek Artymiak" <ja...@ar...>
To: <csg...@li...>
Sent: Saturday, April 05, 2003 7:30 PM
Subject: [Csgl-users] CsGL and VB.NET


> Just for the fun of it, I managed to get VB.NET to cooperate with
> CsGL.  It's been a flawless process so far, save for GL and GLU
> constants, which VB.NET complains about.  I solved this by
> listing the constants my application uses in an Enum ... block
> and then convering them to System.UInt32.  I wonder if there is 
> another (better? more elegant?) way to do it?
> 
> Best Regards,
> --
> Jacek Artymiak
> writer, author, developer, consultant -------------------- 
> member of the Board of the Python Business Forum ---------
> email: ja...@ar... / www: http://www.artymiak.com -
> 
> 
> -------------------------------------------------------
> This SF.net email is sponsored by: ValueWeb: 
> Dedicated Hosting for just $79/mo with 500 GB of bandwidth! 
> No other company gives more support or power for your dedicated server
> http://click.atdmt.com/AFF/go/sdnxxaff00300020aff/direct/01/
> _______________________________________________
> Csgl-users mailing list
> Csg...@li...
> https://lists.sourceforge.net/lists/listinfo/csgl-users

[Csgl-users] CsGL and VB.NET

[Jacek A. <ja...@ar...>]

Just for the fun of it, I managed to get VB.NET to cooperate with
CsGL.  It's been a flawless process so far, save for GL and GLU
constants, which VB.NET complains about.  I solved this by
listing the constants my application uses in an Enum ... block
and then convering them to System.UInt32.  I wonder if there is 
another (better? more elegant?) way to do it?

Best Regards,
--
Jacek Artymiak
writer, author, developer, consultant -------------------- 
member of the Board of the Python Business Forum ---------
email: ja...@ar... / www: http://www.artymiak.com -