plib-users

R: [Plib-users] problem with fnt and release mode

[Paolo L. <p.l...@ci...>]

Me too, anyone interested can look at images in
ftp://ftp.cira.it/paolo/plib/fnt/ (plib 1.3.1, examples 1.1.8, fnt_test a=
nd
PUI's complex, same in 1.2.0 and earlier). Everything else in plib is ok.
My configuration for plib is:
- Work: NT4-SP4, Matrox Millennium G200 latest drivers (OGL ICD), Cygnus
B20.2 gcc 2.95.2
- Home: Windows98, Matrox Marvel G200 latest drivers, same dev env

Greetings -

-------------------------------------------------------------------------=
---
-
Paolo Leoncini                              phone:  +39 (0823) 623134
Scientific Visualization & Virtual Reality      fax:    +39 (0823) 623126
CIRA - Italian Center for Aerospace Researches  mailto:p.l...@ci...
Via Maiorise - 81043 Capua (CE) Italy
http://www.cira.it/research/vis

-----Messaggio originale-----
Da: pli...@li...
[mailto:pli...@li...]Per conto di Eric Desrosie=
rs
Inviato: mercoled=EC 20 dicembre 2000 8.29
A: pli...@li...
Oggetto: [Plib-users] problem with fnt and release mode


Hello,

I am compiling the font library using MSVC++ 5.0. When I compile in debug
mode, everything is working fine, but when I compile the library in relea=
se
mode, the output text is trashy. Only the first letter is right.

Does anyone ever had that problem?

Eric

[Plib-users] problem with fnt and release mode

[Eric D. <sre...@ho...>]

Hello,

I am compiling the font library using MSVC++ 5.0. When I compile in =
debug mode, everything is working fine, but when I compile the library =
in release mode, the output text is trashy. Only the first letter is =
right.

Does anyone ever had that problem?

Eric

Re: [Plib-users] Re: is ok

[Steve B. <sjb...@ai...>]

Thomas Gahr wrote:
 
> confirm 672131

I suspect you sent this to the wrong mailing list!


-- 
Steve Baker   HomeEmail: <sjb...@ai...>
              WorkEmail: <sj...@li...>
              HomePage : http://web2.airmail.net/sjbaker1
              Projects : http://plib.sourceforge.net
                         http://tuxaqfh.sourceforge.net
                         http://tuxkart.sourceforge.net
                         http://prettypoly.sourceforge.net

[Plib-users] Re: is ok

[Thomas G. <pin...@gm...>]

confirm 672131

Re: [Plib-users] Can I use the standard openGL-lib in one program with PLIB??

[Steve B. <sjb...@ai...>]

Thomas Gahr wrote:
> 
> My question:
> 
> Can I use the standard openGL-lib or other libs that use openGL (such as
> particle systems...) and PLIB in one program?

Yes.

My games do that stuff for on-screen scoring, etc.

-- 
Steve Baker   HomeEmail: <sjb...@ai...>
              WorkEmail: <sj...@li...>
              HomePage : http://web2.airmail.net/sjbaker1
              Projects : http://plib.sourceforge.net
                         http://tuxaqfh.sourceforge.net
                         http://tuxkart.sourceforge.net
                         http://prettypoly.sourceforge.net

RE: [Plib-users] Can I use the standard openGL-lib in one program with PLIB??

[Curtis L. O. <cu...@me...>]

Norman Vine writes:
> Thomas Gahr writes:
> >
> >My question:
> >
> >Can I use the standard openGL-lib or other libs that use 
> >openGL (such as
> >particle systems...) and PLIB in one program?
> 
> Yes. .. but
> 
> Since PLib is written in OpenGL, you might look at extending 
> one of the PLib Classes to do what you want

Yes, and if you are careful with managing the opengl "state" you can
mix in any of the raw opengl commands that you want as well.

Curt.
-- 
Curtis Olson   Human Factors Research Lab       Flight Gear Project
Twin Cities    cu...@hf...                cu...@fl...
Minnesota      http://www.menet.umn.edu/~curt   http://www.flightgear.org

RE: [Plib-users] Can I use the standard openGL-lib in one program with PLIB??

[Norman V. <nh...@ca...>]

Thomas Gahr writes:
>
>My question:
>
>Can I use the standard openGL-lib or other libs that use 
>openGL (such as
>particle systems...) and PLIB in one program?

Yes. .. but

Since PLib is written in OpenGL, you might look at extending 
one of the PLib Classes to do what you want

Norman Vine

[Plib-users] Can I use the standard openGL-lib in one program with PLIB??

[Thomas G. <pin...@gm...>]

My question:

Can I use the standard openGL-lib or other libs that use openGL (such as
particle systems...) and PLIB in one program?

Re: [Plib-users] terrain generation...

[Steve B. <sjb...@ai...>]

ha...@sl... wrote:
> 
> Does anyone know of a good place to look for documentation about the
> different methods of doing terrain in a 3D world?

It's a VERY deep subject.

Read the archives of the 'gdalgorithms' mailing list. (I don't know
where those are - but Google-Can-Be-Your-Friend).  There have been
literally hundreds of high quality posts on the subject in the past
couple of months.  There was a period of several weeks when almost
nothing else was talked about and the mail traffic was in the 'dozens
per day' range.

> I know one formula for doing terrains is to use a grey scale bitmap to
> determine the terrain.  Using the lightness or darkness of a pixel to
> determine the height of that part of the terrain.
> 
> Of course, I have no idea how to apply such an algorithm to a real-time
> game.  If I pre-generated the ground as a model based on the texture, it
> would take the poly count for the scene off the scale.

Not necessarily.  That's exactly how the 'TuxRacer' game works.  You
can design your own levels using GIMP!

Look in the PLIB examples under 'majik' - that's a terrain generator
that uses height-maps.
 
You could also look at the FlightGear system - they are BIG TIME
terrain people and some of their solutions are working out very
well.  FlightGear also uses PLIB.  There is a sister project called
TerraGear that deals with creating terrain from raw real-world
data.

IIRC, the FlightGear web site used to have an essay I wrote about
terrain systems - if it's still there, it would be a good place to
visit first because it's a very top-level overview of the available
techniques and their problems.  That essay may have moved to the
TerraGear site after the split - or I may just have dreamt the whole
thing!

-- 
Steve Baker   HomeEmail: <sjb...@ai...>
              WorkEmail: <sj...@li...>
              HomePage : http://web2.airmail.net/sjbaker1
              Projects : http://plib.sourceforge.net
                         http://tuxaqfh.sourceforge.net
                         http://tuxkart.sourceforge.net
                         http://prettypoly.sourceforge.net

Re: [Plib-users] terrain generation...

[Curtis L. O. <cu...@me...>]

Brian,

A good place to start looking at the various approaches is
http://vterrain.org/ 

Curt.

 
ha...@sl... writes:
> 
> Does anyone know of a good place to look for documentation about the
> different methods of doing terrain in a 3D world?
> 
> I'm either looking for resources that talk about terrain generation or
> maybe just some suggestions on the best way to do it with plib in a
> real-time game.
> 
> I know one formula for doing terrains is to use a grey scale bitmap to
> determine the terrain.  Using the lightness or darkness of a pixel to
> determine the height of that part of the terrain.
> 
> Of course, I have no idea how to apply such an algorithm to a real-time
> game.  If I pre-generated the ground as a model based on the texture, it
> would take the poly count for the scene off the scale.
> 
> Any pointers to other resources, or suggestions would be greatly
> appreciated.
> 
> --
> Brian
> 
> _______________________________________________
> plib-users mailing list
> pli...@li...
> http://lists.sourceforge.net/mailman/listinfo/plib-users

-- 
Curtis Olson   Human Factors Research Lab       Flight Gear Project
Twin Cities    cu...@hf...                cu...@fl...
Minnesota      http://www.menet.umn.edu/~curt   http://www.flightgear.org

[Plib-users] terrain generation...

[<ha...@sl...>]

Does anyone know of a good place to look for documentation about the
different methods of doing terrain in a 3D world?

I'm either looking for resources that talk about terrain generation or
maybe just some suggestions on the best way to do it with plib in a
real-time game.

I know one formula for doing terrains is to use a grey scale bitmap to
determine the terrain.  Using the lightness or darkness of a pixel to
determine the height of that part of the terrain.

Of course, I have no idea how to apply such an algorithm to a real-time
game.  If I pre-generated the ground as a model based on the texture, it
would take the poly count for the scene off the scale.

Any pointers to other resources, or suggestions would be greatly
appreciated.

--
Brian

RE: [Plib-users] Hello Everyone

[Norman V. <nh...@ca...>]

Steve Baker writes:
>
>PUI can either use the yukky/slow built-in fonts that come 
>with GLUT (I think FGFSstill uses GLUT - right?) -
> or you can use the PLIB FNT library to load fonts.

FWIW -- FGFS has been using the PLIB FNT "typewriter.txf"
since about a week after the initial PUI release 

:-))

Norman

Re: [Plib-users] Hello Everyone

[Steve B. <sjb...@ai...>]

David Findlay wrote:

> - Can you use true type fonts with PUI?

Not really...well - sortof.

PUI can either use the yukky/slow built-in fonts that come with GLUT (I think FGFS
still uses GLUT - right?) - or you can use the PLIB FNT library to load fonts.

In principal, FNT can be handed any kind of texture map with associated information
about where the glyphs (character shapes) are within the map.

In practice, I've never heard of anyone using anything other than the standard
TXF font loader.

TXF fonts are basically just texturemapped fonts which could in principal be
generated in a variety of ways - although in practice, everyone uses the
original TXF generator written by Mark Kilgard.  That package is given any
X-windows font and renders it into memory and writes that out as a TXF file.

Then FNT (and hence PUI) can use it.

So, if Truetype fonts can be converted to TXF using Marks program (I think
that's possible) - then they'll work with PUI.

HOWEVER - I'm pretty sure that isn't actually the question you are asking.
I'm guessing you want truly scalable fonts that look good at a range of
resolutions.  The trouble with that is that it's hard-to-impossible to do
that at the blazing speed you'd need for most games applications.

I suppose one could try to use something like GLTT which renders TrueType
fonts using polygonal rendering under OpenGL - but you tend to get hundreds
of polygons per character which isn't much good if you have a lot of text
to render.

Anyway - there are no hooks to do that within PUI - so you are stuck with
what's currently possible.

> - On the puInput things, can you get rid of the cursor and only have it
> there when you click in the input?

You could do that outside of PUI by issuing X-windows calls to turn
off the cursor - and then turn it on again in the mouse callback if either
of the buttons are held down.  I believe there is a GLUT call to change the
cursor shape - and one option is no cursor at all.
 
Won't it be rather hard to know what you are clicking on if the cursor
only appears as you click?

Most games use some kind of toggle (either keyboard or mouse button) to
enable or disable the cursor.

-- 
Steve Baker   HomeEmail: <sjb...@ai...>
              WorkEmail: <sj...@li...>
              HomePage : http://web2.airmail.net/sjbaker1
              Projects : http://plib.sourceforge.net
                         http://tuxaqfh.sourceforge.net
                         http://tuxkart.sourceforge.net
                         http://prettypoly.sourceforge.net

[Plib-users] Hello Everyone

[David F. <ne...@bi...>]

Hi.

I am new to this list. I am a FlightGear developer and have been working on
the GUI so I thought I would join this list to find out some more about
using PUI.

Here are a few more questions I have:

- Can you use true type fonts with PUI?
- On the puInput things, can you get rid of the cursor and only have it
there when you click in the input?

David Findlay

[Plib-users] ASE File Loader problems or is it my data?

[<ha...@sl...>]

The first send of this failed, probably because of the attachments.  I'm
resending it without them, they can be found at:

http://www.slothmud.org/~hayward/plibtest

Here is the original message:
---------- Forwarded message ----------
Date: Mon, 4 Dec 2000 22:33:45 -0600 (CST)
From: ha...@sl...
To: pli...@li...
Subject: ASE File Loader problems or is it my data?

I am having problems loading ASE files using both plib 1.3.1 version as
well as the current CVS.  Currently, I'm getting core dumps during
ssgFlatten (in ssgOptimiser.cxx line 829: ent->recalcBSphere ();)

It is a very simple object created in 3D Studio Max, basically kindof a
cube with textures.  My artist provided three examples, one of which
doesn't apply the textures to the cube.  I have attached them along with
the sample textures.  Also attached is my modified "tux_example.cxx" which
came from plib_examples-1.3.1.

If anyone can tell me what I'm doing wrong, I would greatly appreciate it.

Thanks a bunch,
Brian Hayward

------------------- gdb output --------------------------
Starting program:
/home/hayward/plib_examples-1.3.1/src/ssg/tux/tux_example
@@Created GLX Context..

Program received signal SIGSEGV, Segmentation fault.
0x0 in ?? ()
Current language:  auto; currently c
(gdb) where
#0  0x0 in ?? ()
#1  0x8050fd7 in ssgFlatten (ent=0x80da098) at ssgOptimiser.cxx:829
#2  0x804aaec in load_database () at tux_example.cxx:171
#3  0x804ab59 in main () at tux_example.cxx:189
(gdb) down
Bottom (i.e., innermost) frame selected; you cannot go down.
(gdb) up
#1  0x8050fd7 in ssgFlatten (ent=0x80da098) at ssgOptimiser.cxx:829
829       ent -> recalcBSphere () ;
Current language:  auto; currently c++
(gdb) list
824       sgMakeIdentMat4 ( m ) ;
825
826       flatten ( ent, m ) ;
827       strip   ( ent ) ;
828
829       ent -> recalcBSphere () ;
830     }
831
832
833     /*
(gdb)

Re: [Plib-users] Transparent Watermarks

[Steve B. <sjb...@ai...>]

David Findlay wrote:
> 
> With PUI is it possible to add a transparent watermark texture to a dialog
> that is already set up to be transparent? I am not a member of the list, so
> if you reply please CC the reply to me. Thanks

No - I havn't got into textured backgrounds in PUI.

I think you can get around this and make it work by registering a rendering
callback that could draw the textured background.

This is something new - and I confess that I havn't played with it myself - but
there are people on the mailing list who have - so I strongly advise you to
sign up to the list - at least long enough to get your question answered.

  void puObject::setRenderCallback ( function, data ) ;

-- 
Steve Baker   HomeEmail: <sjb...@ai...>
              WorkEmail: <sj...@li...>
              HomePage : http://web2.airmail.net/sjbaker1
              Projects : http://plib.sourceforge.net
                         http://tuxaqfh.sourceforge.net
                         http://tuxkart.sourceforge.net
                         http://prettypoly.sourceforge.net

[Plib-users] Transparent Watermarks

[David F. <ne...@bi...>]

With PUI is it possible to add a transparent watermark texture to a dialog
that is already set up to be transparent? I am not a member of the list, so
if you reply please CC the reply to me. Thanks

David

Re: [Plib-users] Custom Traversal

[Steve B. <sjb...@ai...>]

Devrim Erdem wrote:
> 
> > Devrim Erdem wrote:
> >
> > > I want to add pre and post draw callback functions for each node under a
> > > certain branch ( an flt model ). Since there are no callbacks for
> > > branches I need to traverse the branch to find all the ssgLeaf's.. Is
> > > there a ssgTraverse function or a class ?
> >
> > I'm not too thrilled about DRAW callbacks at the BRANCH level - because it'll
> > cause horrible grief if/when we get around to sorting leaf nodes by material
> > property (which would be a significant speedup in some cases).
> 
> I  have seen the previous postings. So how can I find the the ssgLeaf nodes under
> a branch ?

Well, you have ssgBranch::getNumKids(), ssgBranch::getKid(n) and ssgEntity::isAKindOf()

...so you have all the tools you need to walk down the tree checking nodes to see if
they are derived from ssgLeaf.  A simple recursive tree-walk can easily be put together
in a dozen lines of code.

-- 
Steve Baker   HomeEmail: <sjb...@ai...>
              WorkEmail: <sj...@li...>
              HomePage : http://web2.airmail.net/sjbaker1
              Projects : http://plib.sourceforge.net
                         http://tuxaqfh.sourceforge.net
                         http://tuxkart.sourceforge.net
                         http://prettypoly.sourceforge.net

Re: [Plib-users] Custom Traversal

[Devrim E. <de...@in...>]

> Devrim Erdem wrote:
>
> > I want to add pre and post draw callback functions for each node under a
> > certain branch ( an flt model ). Since there are no callbacks for
> > branches I need to traverse the branch to find all the ssgLeaf's.. Is
> > there a ssgTraverse function or a class ?
>
> I'm not too thrilled about DRAW callbacks at the BRANCH level - because it'll
> cause horrible grief if/when we get around to sorting leaf nodes by material
> property (which would be a significant speedup in some cases).

I  have seen the previous postings. So how can I find the the ssgLeaf nodes under
a branch ?

Sorry for the dump question.

>
>
> You should see the ugliness this causes to Performer.
>
> --
> Steve Baker   HomeEmail: <sjb...@ai...>
>               WorkEmail: <sj...@li...>
>               HomePage : http://web2.airmail.net/sjbaker1
>               Projects : http://plib.sourceforge.net
>                          http://tuxaqfh.sourceforge.net
>                          http://tuxkart.sourceforge.net
>                          http://prettypoly.sourceforge.net
> _______________________________________________
> plib-users mailing list
> pli...@li...
> http://lists.sourceforge.net/mailman/listinfo/plib-users

--
/*===============================================
M. Devrim Erdem            de...@in...
Software Engineering

info(+)TRON, Turkey
Tel: +90 216 4921002, Ext 138
Fax: +90 216 3432132
Http://www.infotron.com.tr
Http://www.machsim.com/devrimerdem
===============================================*/

Re: [Plib-users] Custom Traversal

[Steve B. <sjb...@ai...>]

Devrim Erdem wrote:

> I want to add pre and post draw callback functions for each node under a
> certain branch ( an flt model ). Since there are no callbacks for
> branches I need to traverse the branch to find all the ssgLeaf's.. Is
> there a ssgTraverse function or a class ?

I'm not too thrilled about DRAW callbacks at the BRANCH level - because it'll
cause horrible grief if/when we get around to sorting leaf nodes by material
property (which would be a significant speedup in some cases).

You should see the ugliness this causes to Performer.

-- 
Steve Baker   HomeEmail: <sjb...@ai...>
              WorkEmail: <sj...@li...>
              HomePage : http://web2.airmail.net/sjbaker1
              Projects : http://plib.sourceforge.net
                         http://tuxaqfh.sourceforge.net
                         http://tuxkart.sourceforge.net
                         http://prettypoly.sourceforge.net

RE: [Plib-users] Custom Traversal

[Dave M. <Dav...@dy...>]

> I want to add pre and post draw callback
> functions for each node under a certain
> branch ( an flt model ). Since there are
> no callbacks for branches I need to
> traverse the branch to find all the
> ssgLeaf's.. Is there a ssgTraverse
> function or a class ?

in plib-cvs, look at ssgEntity::setTravCallback().  also, traversing a graph
is pretty simple:

void traverse ( ssgEntity *e )
{
  if ( e -> isAKindOf ( SSG_TYPE_BRANCH ) )
  {
    ssgBranch *br = (ssgBranch *) e ;
    for ( int i = 0 ; i < br -> getNumKids () ; i++ )
      traverse ( br -> getKid ( i ) ) ;
  }

  if ( e -> isAKindOf ( SSG_TYPE_LEAF ) )
  {
    ssgLeaf* leaf = (ssgLeaf*) e ;
    // do something
  }
}

--Dave

[Plib-users] Custom Traversal

[Devrim E. <de...@in...>]

Hi,

I want to add pre and post draw callback functions for each node under a

certain branch ( an flt model ). Since there are no callbacks for
branches I need to traverse the branch to find all the ssgLeaf's.. Is
there a ssgTraverse function or a class ?

Regards,

--
/*===============================================
M. Devrim Erdem            de...@in...
Software Engineering

info(+)TRON, Turkey
Tel: +90 216 4921002, Ext 138
Fax: +90 216 3432132
Http://www.infotron.com.tr
Http://www.machsim.com/devrimerdem
===============================================*/

[Plib-users] Custom Traversal

[Devrim E. <de...@in...>]

Hi,

I want to add pre and post draw callback functions for each node under a
certain branch ( an flt model ). Since there are no callbacks for
branches I need to traverse the branch to find all the ssgLeaf's.. Is
there a ssgTraverse function or a class ?

Regards,

/*===============================================
M. Devrim Erdem            de...@in...
Software Engineering

info(+)TRON, Turkey
Tel: +90 216 4921002, Ext 138
Fax: +90 216 3432132
Http://www.infotron.com.tr
Http://www.machsim.com/devrimerdem
===============================================*/

Re: [plib-users] Hidden Line Removal

[Steve B. <sjb...@ai...>]

Devrim Erdem wrote:
> 
> > Pass 1: Render all the geometry in completely transparent polygons
> >         ...make sure you have glAlphaFunc set so that the DO actually
> >         render.  As an alternative, you could draw the scene with it's
> >         'normal' alpha values - but tell GL to mask off the colour planes.
> >
> > Pass 2: Use glPolygonOffset to move everything a tad closer to the eye
> >         and then re-render the geometry in wireframe mode.
> 
> If I was doing pure opengl I would draw two passes sequentially. But while
> using a scene graph where shall I do the first and the second pass ?

The general idea is to call ssgCullAndDraw twice - once for each pass - with
different things overridden each time.

>  I am planning to draw 1st pass in a predraw and set the state for the second
> pass at the end of the predraw func. This way draw function will automatically
> do the second pass. I wonder how do PLIB'ers do multipass rendering normally.

That doesn't work for this though - you really need to draw ALL of the
Z values before you draw ANY of the wireframe polygons.


-- 
Steve Baker   HomeEmail: <sjb...@ai...>
              WorkEmail: <sj...@li...>
              HomePage : http://web2.airmail.net/sjbaker1
              Projects : http://plib.sourceforge.net
                         http://tuxaqfh.sourceforge.net
                         http://tuxkart.sourceforge.net
                         http://prettypoly.sourceforge.net

Re: [Plib-users] Keyboard control

[Steve B. <sjb...@ai...>]

Kevin Glass wrote:
 
> Is there a cool a way to handle keyboard input under plib?

No - I steer clear of keyboard/mouse bindings because they would prevent you
from choosing between GLUT/GTK/FLTK/whatever.

> The glut
> callback just gives you when a key has been pressed and not when its
> been released.

Aha!  Not so!  Gotcha!

> I'd like to be able to handle both events.

In GLUT 3.7, there is a key-release callback - same syntax as the
key-down callback.

Check out:

    glutKeyboardUpFunc

-- 
Steve Baker   HomeEmail: <sjb...@ai...>
              WorkEmail: <sj...@li...>
              HomePage : http://web2.airmail.net/sjbaker1
              Projects : http://plib.sourceforge.net
                         http://tuxaqfh.sourceforge.net
                         http://tuxkart.sourceforge.net
                         http://prettypoly.sourceforge.net