plib-users

Re: [Plib-users] One sided models switching to two sided

[Wolfram K. <w_...@rz...>]

You wrote:

>I dont think it is the model that is at question, I have exported and =
created it in different formats.=20

Ok.

>I was hoping if someone has had a similiar experience.  Is there some =
possible way that this could happen? =20

Not really. How do you know it is an inside/outside thing and not for
example a ZBuffer problem? Is your near clipping plane set to zero
maybe?

>Changing the order at which I add different ssgBranchs to the scene root=
 for example?

No.

>It is bizzare.

Yes.

Bye bye,
Wolfram.

RE: [Plib-users] ComboBox Problems

[David L. <Dav...@no...>]

On 5/4/04 at 6:23 AM Clay, Bruce wrote:

>Brian:
>  I have had problems using the streams for debugging.  Things get
>buffered so you may not see what you expect.  Try using fprintf(stderr,
>... Instead or put a break point in the callback.  Also, if you are
>doing this with C++ you may have to declare the  callback method as a
>static method.
>

Putting << flush or << endl after stream debugging output to find the site
of a crash should cure the buffering problems.  As you say, output can be
misleading without it.

Cheers - Dave


This message has been scanned but we cannot guarantee that it and any
attachments are free from viruses or other damaging content: you are
advised to perform your own checks.  Email communications with the
University of Nottingham may be monitored as permitted by UK legislation.

RE: [Plib-users] ComboBox Problems

[Clay, B. <bc...@ba...>]

Brian:
  I have had problems using the streams for debugging.  Things get
buffered so you may not see what you expect.  Try using fprintf(stderr,
... Instead or put a break point in the callback.  Also, if you are
doing this with C++ you may have to declare the  callback method as a
static method.

Bruce

-----Original Message-----
From: pli...@li...
[mailto:pli...@li...] On Behalf Of Brian Smith
Sent: Tuesday, May 04, 2004 12:24 AM
To: pli...@li...
Subject: [Plib-users] ComboBox Problems


I am having a little problem with all of the selection objects
(puaComboBox,=20
selectbox, buttonBox).  I have posted this before but no one replied to
me,=20
hoping maybe you can help.  I declare the pointer in the header file.
Here=20
is where I set the combo box and start to use it:

char *listOne[] =3D { "First Entry", "Second Entry", "Third Entry",
"Fourth=20
Entry", "Fifth Entry", "Sixth Entry", NULL } ;

      choiceOne =3D new puaComboBox(30, 400, 230, 425, listOne, FALSE);
      choiceOne->setCallback(ChoiceOneCallback);

I have all of the necessary callbacks for keyboard and mouse.  You can
click=20
on the combobox and the menu drops down, however you can't select
anything. =20
If you use the up arrow on the keyboard (or down whichever) the program
will=20
crash.  However I have displayed that the combo box does have six items
in=20
it.  I think I have narrowed it down to the callback function for the=20
combobox, it never enters in there when something is selected:

void MainChoiceOneCallback(puObject *) {
       cout<<"HELLLOOOOOOOOO";
}
this will display nothing.  I have also tried changing the list for the=20
combobox within the callback and it doesn't change the display at all.
So=20
my question is why is it not entering the callback, is it a bug with=20
pui/puAux or is it my doing??  Thank you in advance.

-Brian

_________________________________________________________________
Getting married? Find tips, tools and the latest trends at MSN Life
Events.=20
http://lifeevents.msn.com/category.aspx?cid=3Dmarried



-------------------------------------------------------
This SF.Net email is sponsored by: Oracle 10g
Get certified on the hottest thing ever to hit the market... Oracle 10g.

Take an Oracle 10g class now, and we'll give you the exam FREE.
http://ads.osdn.com/?ad_id=3D3149&alloc_id=3D8166&op=3Dclick
_______________________________________________
plib-users mailing list
pli...@li...
https://lists.sourceforge.net/lists/listinfo/plib-users

[Plib-users] extending leaves etc

[Simon <sim...@ho...>]

Hi, ok I think I'm beginning to get my head around ssg.  I've read =
through
all the documentation several times now.  What I want to do is add a few
functions and some variables to an object.  I've seen a few ways that =
might
make this possible and I was hoping someone could point me in the right
direction.

=20

Write a new class that extends an entity

Write a new class that extends a leaf node

Write a new class that extends a branch node (don't think it's this one)

Using function call backs on standard versions of the above that call my =
new
functions

Store my variables in the standard versions using the user data section

=20

The docs say:

"It is presumed that applications will add new kinds of leaves, =
branches,
states and textures to customise SSG to their needs."

=20

You see this is where I get confused.  Leaves sound like the best choice =
to
add the extra functionality to each node, so I thought I should make a =
new
class based on ssgLeaf.  But then I read up on adding user data.  I
understand I can pump lots of my own variables into this and that along =
with
pre/post draw call backs I can also call my own functions on an entity =
that
uses these variables.  The problem I see with extending leaves is that =
in my
demo program I don't actually specify "create a leaf of this type".  I =
just
create an ssgRoot and add some ssgEntities to it.  I'm using ssgLoad3ds =
to
generate the model data for each entity so I'm not sure if this creates =
the
leaves internally.

=20

Thank you now and I'll say thank you later

-Simon

=20

=20

=20

RE: [Plib-users] One sided models switching to two sided

[Munn, C. <Chr...@ds...>]

I dont think it is the model that is at question, I have exported and =
created it in different formats.=20
Anyway it sometimes works depending what else is in the scene. Sometime =
the cube goes solid as I revolve around which brings other elements =
into the scene.

I was hoping if someone has had a similiar experience.  Is there some =
possible way that this could happen? =20
Changing the order at which I add different ssgBranchs to the scene =
root for example?

It is bizzare.

-----Original Message-----
From: Wolfram Kuss [mailto:w_...@rz...]
Sent: Monday, 3 May 2004 3:51 AM
To: pli...@li...
Subject: Re: [Plib-users] One sided models switching to two sided


Very strange. If you want, email me the 3D file and I will have a
look.

Bye bye,
Wolfram.


-----Original Message-----
From: Munn, Chris [mailto:Chr...@ds...]
Sent: Friday, 30 April 2004 4:49 PM
To: 'pli...@li...'
Subject: [Plib-users] One sided models switching to two sided

Hello,
I am experiencing a wierd problem where I load a 3d model of a 1 sided =
cube with its normals pointed inward. I.E I can see inside the cube =
from the outside.  Somehow depending on where my camera is placed the =
cube becomes twosided (or flipped normals) so I can not see inside it.  =

I have a class derived from ssgTransform that the has the cube =
ssgTransform added as a kid.  Am I doing something wrong?


-------------------------------------------------------
This SF.Net email is sponsored by: Oracle 10g
Get certified on the hottest thing ever to hit the market... Oracle =
10g.=20
Take an Oracle 10g class now, and we'll give you the exam FREE.
http://ads.osdn.com/?ad_id149&alloc_id=8166&op=3Dclick



_______________________________________________
plib-users mailing list
pli...@li...
https://lists.sourceforge.net/lists/listinfo/plib-users

[Plib-users] ComboBox Problems

[Brian S. <sch...@ho...>]

I am having a little problem with all of the selection objects (puaComboBox, 
selectbox, buttonBox).  I have posted this before but no one replied to me, 
hoping maybe you can help.  I declare the pointer in the header file.  Here 
is where I set the combo box and start to use it:

char *listOne[] = { "First Entry", "Second Entry", "Third Entry", "Fourth 
Entry", "Fifth Entry", "Sixth Entry", NULL } ;

      choiceOne = new puaComboBox(30, 400, 230, 425, listOne, FALSE);
      choiceOne->setCallback(ChoiceOneCallback);

I have all of the necessary callbacks for keyboard and mouse.  You can click 
on the combobox and the menu drops down, however you can't select anything.  
If you use the up arrow on the keyboard (or down whichever) the program will 
crash.  However I have displayed that the combo box does have six items in 
it.  I think I have narrowed it down to the callback function for the 
combobox, it never enters in there when something is selected:

void MainChoiceOneCallback(puObject *) {
       cout<<"HELLLOOOOOOOOO";
}
this will display nothing.  I have also tried changing the list for the 
combobox within the callback and it doesn't change the display at all.  So 
my question is why is it not entering the callback, is it a bug with 
pui/puAux or is it my doing??  Thank you in advance.

-Brian

_________________________________________________________________
Getting married? Find tips, tools and the latest trends at MSN Life Events. 
http://lifeevents.msn.com/category.aspx?cid=married

Re: [Plib-users] One sided models switching to two sided

[Wolfram K. <w_...@rz...>]

Very strange. If you want, email me the 3D file and I will have a
look.

Bye bye,
Wolfram.

[Plib-users] Mac OS X compilation of the PLIB Examples

[Daniel T K. <dan...@dy...>]

I was trying to get the PLIB Examples 1.8.x to compile under Mac OS X 
10.3.x and it failed.

Has anyone been able to get them to compile under this operating system?

If they have, then I'll keep trying.  If not, then I'll send in the error 
messages,etc. to see what is going wrong.

Danny

[Plib-users] One sided models switching to two sided

[Munn, C. <Chr...@ds...>]

Hello,
I am experiencing a wierd problem where I load a 3d model of a 1 sided cube with its normals pointed inward. I.E I can see inside the cube from the outside.  Somehow depending on where my camera is placed the cube becomes twosided (or flipped normals) so I can not see inside it.  
I have a class derived from ssgTransform that the has the cube ssgTransform added as a kid.  Am I doing something wrong?

ssgTransform * chamber;
ssgTransform * cube ;
chamber.addKid(cube);

root.addKid(chamber);

R: [Plib-users] Identifying objects after loading an AC3D- modell

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

Michael,

Should the search function not find any node could be due to the
'flatten' graph reorganization, if you apply it. Flatten eliminates
unnecessary ssgTransforms (those with identity xform) - so incidentally
deleting those nodes which actually hold the object name (loaders
normally setName() just to ssgTransform nodes). I never went down to its
source code, so it could be that ssgTransform's with a name set are
'saved' in the flatten op.

Greetings -

Paolo


> -----Messaggio originale-----
> Da: pli...@li...=20
> [mailto:pli...@li...] Per conto di=20
> Michael Wessels
> Inviato: marted=EC 27 aprile 2004 11.44
> A: pli...@li...
> Oggetto: Re: [Plib-users] Identifying objects after loading=20
> an AC3D- modell
>=20
>=20
> Hi Paolo,
> I will try it.
>=20
> Thanks
>=20
> Michael
> ----- Original Message -----=20
> From: "Paolo Leoncini" <p.l...@ci...>
> To: <pli...@li...>
> Sent: Tuesday, April 27, 2004 9:44 AM
> Subject: R: [Plib-users] Identifying objects after loading an=20
> AC3D- modell
>=20
>=20
> Michael,
>=20
> You're welcome - ftp://ftp.cira.it/download/lepa069/envmap.cxx
>=20
> Hope everything is clear with this little comment support -=20
> this is how I manage the env mapping property into SSG and=20
> the corresponding search-then-setup functions.
>=20
> Greetings -
>=20
> Paolo
>=20
>=20
> > -----Messaggio originale-----
> > Da: pli...@li...
> > [mailto:pli...@li...] Per conto=20
> di Michael=20
> > Wessels
> > Inviato: luned=EC 26 aprile 2004 18.38
> > A: pli...@li...
> > Oggetto: Re: [Plib-users] Identifying objects after loading=20
> an AC3D-=20
> > modell
> >
> >
> > Hi Paolo,
> > I understand what you mean and I agree. I have tried to=20
> walk through=20
> > the tree but not successfull. Can you give me some lines of=20
> C/C++code=20
> > how to do it ? Best regards
> >
> > Michael
> >
> > ----- Original Message -----
> > From: "Paolo Leoncini" <p.l...@ci...>
> > To: <pli...@li...>
> > Sent: Monday, April 26, 2004 9:59 AM
> > Subject: R: [Plib-users] Identifying objects after loading an
> > AC3D- modell
> >
> >
> > Michael,
> >
> > Is the problem setting custom properties for objects/materials?
> >
> > The approach based on inline comments doesn't meet my favour since
> > a) it works only for ascii-text file (3D) formats such as AC3D,
> > b) needs of manual editing as you update the file (risk to=20
> loose such=20
> > addenda or to be enabled to do it only in its final version).
> >
> > I'm in favour of this alternative solution:
> >
> > A) manually write a simple text properties file - I use kinda .ini
> > format:
> >
> > [property]
> > Object-name Params
> > ...
> > [property]
> > Material-name Params
> > ...
> >
> > B) learn to parse your format, and, after having loaded the=20
> 3D data,=20
> > walk the graph by first identifying nodes by name (either=20
> objects or=20
> > materials, the getName() method works on both, and on=20
> non-states you=20
> > have also the getByName()
> > utility) - all 3D formats allow to identifiy objs/mats by a textual=20
> > name - then setting node properties depending on the=20
> directive in the=20
> > file.
> >
> > I use properties like envmap, mirror, no-lit (disable=20
> lighting), etc,=20
> > some acting on leafs and others on states.
> >
> > This approach is not so heavy in the implementation, keeps=20
> 3D data and=20
> > custom properties separate, and works for all 3D data formats.
> >
> > Greetings -
> >
> > Paolo
> >
> >
> > > -----Messaggio originale-----
> > > Da: pli...@li...
> > > [mailto:pli...@li...] Per conto
> > di Michael
> > > Wessels
> > > Inviato: venerd=EC 23 aprile 2004 18.47
> > > A: pli...@li...
> > > Oggetto: Re: [Plib-users] Identifying objects after loading
> > an AC3D-
> > > modell
> > >
> > >
> > > Dear Steve,
> > > I have implemented what you said.
> > > But when I debug the application the code never jumps in
> > the function
> > > ssgBranch *process_userdata ( char *data ) . My ac-file looks=20
> > > folowing:.
> > >
> > > AC3Db
> > > MATERIAL "ac3dmat1" rgb 1 1 1  amb 0.2 0.2 0.2  emis 0 0=20
> 0 spec 0.5=20
> > > 0.5 0.5 shi 10  trans 0 MATERIAL "ac3dmat3" rgb 1 0 0  amb
> > 0.2 0.2 0.2
> > > emis 0 0 0  spec 0.5 0.5 0.5 shi 10 trans 0 MATERIAL=20
> "ac3dmat7" rgb=20
> > > 0.270588 0.52549 0.454902 amb 0.2 0.2 0.2  emis 0 0 0 =20
> spec 0.5 0.5=20
> > > 0.5  shi 10  trans 0 MATERIAL "ac3dmat9" rgb 0 0 1  amb 0.2
> > 0.2 0.2
> > > emis 0 0 0 spec 0.5 0.5 0.5 shi 10  trans 0 MATERIAL=20
> "ac3dmat13" rgb=20
> > > 0.533333 0.533333 0.533333  amb 0.2 0.2 0.2  emis 0 0 0  spec 0.5=20
> > > 0.5 0.5  shi 10  trans 0 OBJECT world kids 2 OBJECT group name=20
> > > "Race-Course" loc 0.560112 0.0001 0.361112 kids 4 OBJECT=20
> poly name=20
> > > "poly" loc -0.240913 0 -0.282012 texture "ASSPHALT.bmp"=20
> texrep 10 10=20
> > > numvert 10 -0.1712 0 -0.1475 -0.0751 0 -0.1577 0.0686 0 -0.1675=20
> > > 0.2239 0 -0.1789 0.3284 0 -0.1871 0.3219 0 -0.2051 0.1242=20
> 0 -0.1854=20
> > > -0.0899 0 -0.1724 -0.1744 0 -0.1613 -0.1744 0 -0.1613 numsurf 10
> > > ............... ................
> > >
> > > I attach the .ac-file to this mail.
> > > My intention is to seperate for example the
> > >
> > > OBJECT group
> > > name "Race-Course"
> > >
> > > as a single object from the rest.
> > > What can I do ?
> > >
> > > Best regards
> > >
> > > ----- Original Message -----
> > > From: "Steve Baker" <sjb...@ai...>
> > > To: <pli...@li...>
> > > Sent: Friday, March 26, 2004 3:35 AM
> > > Subject: Re: [Plib-users] Identifying objects after=20
> loading an AC3D-=20
> > > modell
> > >
> > >
> > > > Michael Wessels wrote:
> > > >
> > > > > in my '.ac' file I have the comment field "Tribune1". How
> > > can I tell
> > > > > the PLIB loaders to call a callback function in the
> > > application when
> > > > > they
> > > find
> > > > > this comment field ?
> > > >
> > > > Write a function like this:
> > > >
> > > >    ssgBranch *process_userdata ( char *data )
> > > >    {
> > > >      if ( data =3D=3D NULL || data [ 0 ] =3D=3D '\0' ) return =
NULL ;
> > > >
> > > >      if ( strncmp ( "Tribune1", data, strlen ( "Tribune1"
> > ) ) =3D=3D 0 )
> > > >      {
> > > >        ssgBranch *b =3D new ssgBranch () ;  /* ...or whatever
> > > you want
> > > > this
> > > node to be */
> > > >        /* whatever you need to do here */
> > > >        return b ;
> > > >      }
> > > >
> > > >      return NULL ;
> > > >    }
> > > >
> > > >
> > > > Sometime after ssgInit() but before you load your model:
> > > >
> > > >    ssgLoaderOptions *loader_opts =3D new ssgLoaderOptions () ;
> > > >    loader_opts -> setCreateBranchCallback ( process_userdata ) ;
> > > >    /* You may wish to set other loader options here */
> > > >    ssgSetCurrentOptions ( loader_opts ) ;
> > > >
> > > > ...then just load your model in the usual way and whenever
> > > SSG needs
> > > > to create a branch node, it'll call your 'process_userdata'
> > > > function with the comment as the parameter.   If this is
> > a 'special'
> > > > node, then you create the node and return it as the result.
> > >  If it's
> > > > not special then just return NULL and the loader will do
> > something
> > > > appropriate.
> > > >
> > > > ---------------------------- Steve Baker=20
> -------------------------
> > > > HomeEmail: <sjb...@ai...>    WorkEmail:=20
> <sj...@li...>
> > > > HomePage : http://www.sjbaker.org
> > > > Projects : http://plib.sf.net    http://tuxaqfh.sf.net
> > > >             http://tuxkart.sf.net http://prettypoly.sf.net
> > > -----BEGIN
> > > > GEEK CODE BLOCK----- GCS d-- s:+ a+ C++++$ UL+++$ P---=20
> L++++$ E---
> > > > W+++ N o+ K? w--- !O M-
> > > > V-- PS++ PE- Y-- PGP-- t+ 5 X R+++ tv b++ DI++ D G+ e++
> > h--(-) r+++
> > > > y++++ -----END GEEK CODE BLOCK-----
> > > >
> > > >
> > > > -------------------------------------------------------
> > > > This SF.Net email is sponsored by: IBM Linux Tutorials=20
> Free Linux=20
> > > > tutorial presented by Daniel Robbins, President
> > > and CEO of
> > > > GenToo technologies. Learn everything from fundamentals=20
> to system
> > > >
> > >
> >=20
> =
administration.http://ads.osdn.com/?ad_id=3D1470&alloc_id=3D3638&op=3Dcli=
ck
> > > > _______________________________________________
> > > > plib-users mailing list
> > > > pli...@li...=20
> > > > https://lists.sourceforge.net/lists/listinfo/plib-users
> > >
> > >
> > >
> > > -------------------------------------------------------
> > > This SF.net email is sponsored by: The Robotic Monkeys at=20
> ThinkGeek=20
> > > For a limited time only, get FREE Ground shipping on all
> > orders of $35
> > > or more. Hurry up and shop folks, this offer expires April 30th!=20
> > > http://www.thinkgeek.com/freeshipping/?cpg=3D> 12297
> > >
> > > _______________________________________________
> > >
> > > plib-users mailing list
> > > pli...@li...=20
> > > https://lists.sourceforge.net/lists/listinfo/p> lib-users
> > >
> >
> >
> >
> > -------------------------------------------------------
> > This SF.net email is sponsored by: The Robotic Monkeys at ThinkGeek=20
> > For a limited time only, get FREE Ground shipping on all=20
> orders of $35=20
> > or more. Hurry up and shop folks, this offer expires April 30th!
> > http://www.thinkgeek.com/freeshipping/?cpg=12297
> >
> > _______________________________________________
> > plib-users mailing list
> > pli...@li...=20
> > https://lists.sourceforge.net/lists/listinfo/p> lib-users
> >
> >
> >
> >
> > -------------------------------------------------------
> > This SF.net email is sponsored by: The Robotic Monkeys at ThinkGeek=20
> > For a limited time only, get FREE Ground shipping on all=20
> orders of $35=20
> > or more. Hurry up and shop folks, this offer expires April 30th!
> > http://www.thinkgeek.com/freeshipping/?cpg=12297
> >
> > _______________________________________________
> > plib-users mailing list
> > pli...@li...=20
> > https://lists.sourceforge.net/lists/listinfo/p> lib-users
> >
>=20
>=20
>=20
> -------------------------------------------------------
> This SF.net email is sponsored by: The Robotic Monkeys at=20
> ThinkGeek For a limited time only, get FREE Ground shipping=20
> on all orders of $35 or more. Hurry up and shop folks, this=20
> offer expires April 30th!=20
> http://www.thinkgeek.com/freeshipping/?cpg=12297
>=20
> _______________________________________________
> plib-users mailing list
> pli...@li...=20
> https://lists.sourceforge.net/lists/listinfo/p> lib-users
>=20
>=20
>=20
>=20
> -------------------------------------------------------
> This SF.net email is sponsored by: The Robotic Monkeys at=20
> ThinkGeek For a limited time only, get FREE Ground shipping=20
> on all orders of $35 or more. Hurry up and shop folks, this=20
> offer expires April 30th!=20
> http://www.thinkgeek.com/freeshipping/?cpg=12297
>=20
> _______________________________________________
> plib-users mailing list
> pli...@li...=20
> https://lists.sourceforge.net/lists/listinfo/p> lib-users
>=20

Re: [Plib-users] Identifying objects after loading an AC3D- modell

[Michael W. <mic...@ti...>]

Hi Paolo,
I will try it.

Thanks

Michael
----- Original Message -----=20
From: "Paolo Leoncini" <p.l...@ci...>
To: <pli...@li...>
Sent: Tuesday, April 27, 2004 9:44 AM
Subject: R: [Plib-users] Identifying objects after loading an AC3D- model=
l


Michael,

You're welcome - ftp://ftp.cira.it/download/lepa069/envmap.cxx

Hope everything is clear with this little comment support - this is how
I manage the env mapping property into SSG and the corresponding
search-then-setup functions.

Greetings -

Paolo


> -----Messaggio originale-----
> Da: pli...@li...
> [mailto:pli...@li...] Per conto di
> Michael Wessels
> Inviato: luned=EC 26 aprile 2004 18.38
> A: pli...@li...
> Oggetto: Re: [Plib-users] Identifying objects after loading
> an AC3D- modell
>
>
> Hi Paolo,
> I understand what you mean and I agree. I have tried to walk
> through the tree but not successfull. Can you give me some
> lines of C/C++code how to do it ? Best regards
>
> Michael
>
> ----- Original Message -----=20
> From: "Paolo Leoncini" <p.l...@ci...>
> To: <pli...@li...>
> Sent: Monday, April 26, 2004 9:59 AM
> Subject: R: [Plib-users] Identifying objects after loading an
> AC3D- modell
>
>
> Michael,
>
> Is the problem setting custom properties for objects/materials?
>
> The approach based on inline comments doesn't meet my favour since
> a) it works only for ascii-text file (3D) formats such as AC3D,
> b) needs of manual editing as you update the file (risk to
> loose such addenda or to be enabled to do it only in its
> final version).
>
> I'm in favour of this alternative solution:
>
> A) manually write a simple text properties file - I use kinda .ini
> format:
>
> [property]
> Object-name Params
> ...
> [property]
> Material-name Params
> ...
>
> B) learn to parse your format, and, after having loaded the
> 3D data, walk the graph by first identifying nodes by name
> (either objects or materials, the getName() method works on
> both, and on non-states you have also the getByName()
> utility) - all 3D formats allow to identifiy objs/mats by a
> textual name - then setting node properties depending on the
> directive in the file.
>
> I use properties like envmap, mirror, no-lit (disable
> lighting), etc, some acting on leafs and others on states.
>
> This approach is not so heavy in the implementation, keeps 3D
> data and custom properties separate, and works for all 3D
> data formats.
>
> Greetings -
>
> Paolo
>
>
> > -----Messaggio originale-----
> > Da: pli...@li...
> > [mailto:pli...@li...] Per conto
> di Michael
> > Wessels
> > Inviato: venerd=EC 23 aprile 2004 18.47
> > A: pli...@li...
> > Oggetto: Re: [Plib-users] Identifying objects after loading
> an AC3D-
> > modell
> >
> >
> > Dear Steve,
> > I have implemented what you said.
> > But when I debug the application the code never jumps in
> the function
> > ssgBranch *process_userdata ( char *data ) . My ac-file looks
> > folowing:.
> >
> > AC3Db
> > MATERIAL "ac3dmat1" rgb 1 1 1  amb 0.2 0.2 0.2  emis 0 0 0 spec 0.5
> > 0.5 0.5 shi 10  trans 0 MATERIAL "ac3dmat3" rgb 1 0 0  amb
> 0.2 0.2 0.2
> > emis 0 0 0  spec 0.5 0.5 0.5 shi 10 trans 0 MATERIAL "ac3dmat7" rgb
> > 0.270588 0.52549 0.454902 amb 0.2 0.2 0.2  emis 0 0 0  spec 0.5 0.5
> > 0.5  shi 10  trans 0 MATERIAL "ac3dmat9" rgb 0 0 1  amb 0.2
> 0.2 0.2
> > emis 0 0 0 spec 0.5 0.5 0.5 shi 10  trans 0 MATERIAL "ac3dmat13" rgb
> > 0.533333 0.533333 0.533333  amb 0.2 0.2 0.2  emis 0 0 0  spec
> > 0.5 0.5 0.5  shi 10  trans 0 OBJECT world kids 2 OBJECT group
> > name "Race-Course" loc 0.560112 0.0001 0.361112 kids 4 OBJECT
> > poly name "poly" loc -0.240913 0 -0.282012 texture
> > "ASSPHALT.bmp" texrep 10 10 numvert 10 -0.1712 0 -0.1475
> > -0.0751 0 -0.1577 0.0686 0 -0.1675 0.2239 0 -0.1789 0.3284 0
> > -0.1871 0.3219 0 -0.2051 0.1242 0 -0.1854 -0.0899 0 -0.1724
> > -0.1744 0 -0.1613 -0.1744 0 -0.1613 numsurf 10
> > ............... ................
> >
> > I attach the .ac-file to this mail.
> > My intention is to seperate for example the
> >
> > OBJECT group
> > name "Race-Course"
> >
> > as a single object from the rest.
> > What can I do ?
> >
> > Best regards
> >
> > ----- Original Message -----
> > From: "Steve Baker" <sjb...@ai...>
> > To: <pli...@li...>
> > Sent: Friday, March 26, 2004 3:35 AM
> > Subject: Re: [Plib-users] Identifying objects after loading
> > an AC3D- modell
> >
> >
> > > Michael Wessels wrote:
> > >
> > > > in my '.ac' file I have the comment field "Tribune1". How
> > can I tell
> > > > the PLIB loaders to call a callback function in the
> > application when
> > > > they
> > find
> > > > this comment field ?
> > >
> > > Write a function like this:
> > >
> > >    ssgBranch *process_userdata ( char *data )
> > >    {
> > >      if ( data =3D=3D NULL || data [ 0 ] =3D=3D '\0' ) return NULL =
;
> > >
> > >      if ( strncmp ( "Tribune1", data, strlen ( "Tribune1"
> ) ) =3D=3D 0 )
> > >      {
> > >        ssgBranch *b =3D new ssgBranch () ;  /* ...or whatever
> > you want
> > > this
> > node to be */
> > >        /* whatever you need to do here */
> > >        return b ;
> > >      }
> > >
> > >      return NULL ;
> > >    }
> > >
> > >
> > > Sometime after ssgInit() but before you load your model:
> > >
> > >    ssgLoaderOptions *loader_opts =3D new ssgLoaderOptions () ;
> > >    loader_opts -> setCreateBranchCallback ( process_userdata ) ;
> > >    /* You may wish to set other loader options here */
> > >    ssgSetCurrentOptions ( loader_opts ) ;
> > >
> > > ...then just load your model in the usual way and whenever
> > SSG needs
> > > to create a branch node, it'll call your 'process_userdata'
> > > function with the comment as the parameter.   If this is
> a 'special'
> > > node, then you create the node and return it as the result.
> >  If it's
> > > not special then just return NULL and the loader will do
> something
> > > appropriate.
> > >
> > > ---------------------------- Steve Baker -------------------------
> > > HomeEmail: <sjb...@ai...>    WorkEmail: <sj...@li...>
> > > HomePage : http://www.sjbaker.org
> > > Projects : http://plib.sf.net    http://tuxaqfh.sf.net
> > >             http://tuxkart.sf.net http://prettypoly.sf.net
> > -----BEGIN
> > > GEEK CODE BLOCK----- GCS d-- s:+ a+ C++++$ UL+++$ P--- L++++$ E---
> > > W+++ N o+ K? w--- !O M-
> > > V-- PS++ PE- Y-- PGP-- t+ 5 X R+++ tv b++ DI++ D G+ e++
> h--(-) r+++
> > > y++++ -----END GEEK CODE BLOCK-----
> > >
> > >
> > > -------------------------------------------------------
> > > This SF.Net email is sponsored by: IBM Linux Tutorials
> > > Free Linux tutorial presented by Daniel Robbins, President
> > and CEO of
> > > GenToo technologies. Learn everything from fundamentals to system
> > >
> >
> administration.http://ads.osdn.com/?ad_id=3D1470&alloc_id=3D3638&op=3Dc=
lick
> > > _______________________________________________
> > > plib-users mailing list
> > > pli...@li...
> > > https://lists.sourceforge.net/lists/listinfo/plib-users
> >
> >
> >
> > -------------------------------------------------------
> > This SF.net email is sponsored by: The Robotic Monkeys at ThinkGeek
> > For a limited time only, get FREE Ground shipping on all
> orders of $35
> > or more. Hurry up and shop folks, this offer expires April 30th!
> > http://www.thinkgeek.com/freeshipping/?cpg=3D> 12297
> >
> > _______________________________________________
> >
> > plib-users mailing list
> > pli...@li...
> > https://lists.sourceforge.net/lists/listinfo/p> lib-users
> >
>
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: The Robotic Monkeys at
> ThinkGeek For a limited time only, get FREE Ground shipping
> on all orders of $35 or more. Hurry up and shop folks, this
> offer expires April 30th!
> http://www.thinkgeek.com/freeshipping/?cpg=12297
>
> _______________________________________________
> plib-users mailing list
> pli...@li...
> https://lists.sourceforge.net/lists/listinfo/p> lib-users
>
>
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: The Robotic Monkeys at
> ThinkGeek For a limited time only, get FREE Ground shipping
> on all orders of $35 or more. Hurry up and shop folks, this
> offer expires April 30th!
> http://www.thinkgeek.com/freeshipping/?cpg=12297
>
> _______________________________________________
> plib-users mailing list
> pli...@li...
> https://lists.sourceforge.net/lists/listinfo/p> lib-users
>



-------------------------------------------------------
This SF.net email is sponsored by: The Robotic Monkeys at ThinkGeek
For a limited time only, get FREE Ground shipping on all orders of $35
or more. Hurry up and shop folks, this offer expires April 30th!
http://www.thinkgeek.com/freeshipping/?cpg=12297
_______________________________________________
plib-users mailing list
pli...@li...
https://lists.sourceforge.net/lists/listinfo/plib-users

R: [Plib-users] Identifying objects after loading an AC3D- modell

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

Michael,

You're welcome - ftp://ftp.cira.it/download/lepa069/envmap.cxx

Hope everything is clear with this little comment support - this is how
I manage the env mapping property into SSG and the corresponding
search-then-setup functions.

Greetings -

Paolo


> -----Messaggio originale-----
> Da: pli...@li...=20
> [mailto:pli...@li...] Per conto di=20
> Michael Wessels
> Inviato: luned=EC 26 aprile 2004 18.38
> A: pli...@li...
> Oggetto: Re: [Plib-users] Identifying objects after loading=20
> an AC3D- modell
>=20
>=20
> Hi Paolo,
> I understand what you mean and I agree. I have tried to walk=20
> through the tree but not successfull. Can you give me some=20
> lines of C/C++code how to do it ? Best regards
>=20
> Michael
>=20
> ----- Original Message -----=20
> From: "Paolo Leoncini" <p.l...@ci...>
> To: <pli...@li...>
> Sent: Monday, April 26, 2004 9:59 AM
> Subject: R: [Plib-users] Identifying objects after loading an=20
> AC3D- modell
>=20
>=20
> Michael,
>=20
> Is the problem setting custom properties for objects/materials?
>=20
> The approach based on inline comments doesn't meet my favour since
> a) it works only for ascii-text file (3D) formats such as AC3D,
> b) needs of manual editing as you update the file (risk to=20
> loose such addenda or to be enabled to do it only in its=20
> final version).
>=20
> I'm in favour of this alternative solution:
>=20
> A) manually write a simple text properties file - I use kinda .ini
> format:
>=20
> [property]
> Object-name Params
> ...
> [property]
> Material-name Params
> ...
>=20
> B) learn to parse your format, and, after having loaded the=20
> 3D data, walk the graph by first identifying nodes by name=20
> (either objects or materials, the getName() method works on=20
> both, and on non-states you have also the getByName()=20
> utility) - all 3D formats allow to identifiy objs/mats by a=20
> textual name - then setting node properties depending on the=20
> directive in the file.
>=20
> I use properties like envmap, mirror, no-lit (disable=20
> lighting), etc, some acting on leafs and others on states.
>=20
> This approach is not so heavy in the implementation, keeps 3D=20
> data and custom properties separate, and works for all 3D=20
> data formats.
>=20
> Greetings -
>=20
> Paolo
>=20
>=20
> > -----Messaggio originale-----
> > Da: pli...@li...
> > [mailto:pli...@li...] Per conto=20
> di Michael=20
> > Wessels
> > Inviato: venerd=EC 23 aprile 2004 18.47
> > A: pli...@li...
> > Oggetto: Re: [Plib-users] Identifying objects after loading=20
> an AC3D-=20
> > modell
> >
> >
> > Dear Steve,
> > I have implemented what you said.
> > But when I debug the application the code never jumps in=20
> the function=20
> > ssgBranch *process_userdata ( char *data ) . My ac-file looks=20
> > folowing:.
> >
> > AC3Db
> > MATERIAL "ac3dmat1" rgb 1 1 1  amb 0.2 0.2 0.2  emis 0 0 0 spec 0.5=20
> > 0.5 0.5 shi 10  trans 0 MATERIAL "ac3dmat3" rgb 1 0 0  amb=20
> 0.2 0.2 0.2 =20
> > emis 0 0 0  spec 0.5 0.5 0.5 shi 10 trans 0 MATERIAL "ac3dmat7" rgb=20
> > 0.270588 0.52549 0.454902 amb 0.2 0.2 0.2  emis 0 0 0  spec 0.5 0.5=20
> > 0.5  shi 10  trans 0 MATERIAL "ac3dmat9" rgb 0 0 1  amb 0.2=20
> 0.2 0.2 =20
> > emis 0 0 0 spec 0.5 0.5 0.5 shi 10  trans 0 MATERIAL "ac3dmat13" rgb
> > 0.533333 0.533333 0.533333  amb 0.2 0.2 0.2  emis 0 0 0  spec
> > 0.5 0.5 0.5  shi 10  trans 0 OBJECT world kids 2 OBJECT group
> > name "Race-Course" loc 0.560112 0.0001 0.361112 kids 4 OBJECT
> > poly name "poly" loc -0.240913 0 -0.282012 texture
> > "ASSPHALT.bmp" texrep 10 10 numvert 10 -0.1712 0 -0.1475
> > -0.0751 0 -0.1577 0.0686 0 -0.1675 0.2239 0 -0.1789 0.3284 0
> > -0.1871 0.3219 0 -0.2051 0.1242 0 -0.1854 -0.0899 0 -0.1724
> > -0.1744 0 -0.1613 -0.1744 0 -0.1613 numsurf 10
> > ............... ................
> >
> > I attach the .ac-file to this mail.
> > My intention is to seperate for example the
> >
> > OBJECT group
> > name "Race-Course"
> >
> > as a single object from the rest.
> > What can I do ?
> >
> > Best regards
> >
> > ----- Original Message -----
> > From: "Steve Baker" <sjb...@ai...>
> > To: <pli...@li...>
> > Sent: Friday, March 26, 2004 3:35 AM
> > Subject: Re: [Plib-users] Identifying objects after loading
> > an AC3D- modell
> >
> >
> > > Michael Wessels wrote:
> > >
> > > > in my '.ac' file I have the comment field "Tribune1". How
> > can I tell
> > > > the PLIB loaders to call a callback function in the
> > application when
> > > > they
> > find
> > > > this comment field ?
> > >
> > > Write a function like this:
> > >
> > >    ssgBranch *process_userdata ( char *data )
> > >    {
> > >      if ( data =3D=3D NULL || data [ 0 ] =3D=3D '\0' ) return NULL =
;
> > >
> > >      if ( strncmp ( "Tribune1", data, strlen ( "Tribune1"=20
> ) ) =3D=3D 0 )
> > >      {
> > >        ssgBranch *b =3D new ssgBranch () ;  /* ...or whatever
> > you want
> > > this
> > node to be */
> > >        /* whatever you need to do here */
> > >        return b ;
> > >      }
> > >
> > >      return NULL ;
> > >    }
> > >
> > >
> > > Sometime after ssgInit() but before you load your model:
> > >
> > >    ssgLoaderOptions *loader_opts =3D new ssgLoaderOptions () ;
> > >    loader_opts -> setCreateBranchCallback ( process_userdata ) ;
> > >    /* You may wish to set other loader options here */
> > >    ssgSetCurrentOptions ( loader_opts ) ;
> > >
> > > ...then just load your model in the usual way and whenever
> > SSG needs
> > > to create a branch node, it'll call your 'process_userdata'
> > > function with the comment as the parameter.   If this is=20
> a 'special'
> > > node, then you create the node and return it as the result.
> >  If it's
> > > not special then just return NULL and the loader will do=20
> something=20
> > > appropriate.
> > >
> > > ---------------------------- Steve Baker -------------------------
> > > HomeEmail: <sjb...@ai...>    WorkEmail: <sj...@li...>
> > > HomePage : http://www.sjbaker.org
> > > Projects : http://plib.sf.net    http://tuxaqfh.sf.net
> > >             http://tuxkart.sf.net http://prettypoly.sf.net
> > -----BEGIN
> > > GEEK CODE BLOCK----- GCS d-- s:+ a+ C++++$ UL+++$ P--- L++++$ E---
> > > W+++ N o+ K? w--- !O M-
> > > V-- PS++ PE- Y-- PGP-- t+ 5 X R+++ tv b++ DI++ D G+ e++=20
> h--(-) r+++
> > > y++++ -----END GEEK CODE BLOCK-----
> > >
> > >
> > > -------------------------------------------------------
> > > This SF.Net email is sponsored by: IBM Linux Tutorials
> > > Free Linux tutorial presented by Daniel Robbins, President
> > and CEO of
> > > GenToo technologies. Learn everything from fundamentals to system
> > >
> >=20
> =
administration.http://ads.osdn.com/?ad_id=3D1470&alloc_id=3D3638&op=3Dcli=
ck
> > > _______________________________________________
> > > plib-users mailing list
> > > pli...@li...=20
> > > https://lists.sourceforge.net/lists/listinfo/plib-users
> >
> >
> >
> > -------------------------------------------------------
> > This SF.net email is sponsored by: The Robotic Monkeys at ThinkGeek=20
> > For a limited time only, get FREE Ground shipping on all=20
> orders of $35=20
> > or more. Hurry up and shop folks, this offer expires April 30th!
> > http://www.thinkgeek.com/freeshipping/?cpg=3D> 12297
> >
> > _______________________________________________
> >
> > plib-users mailing list
> > pli...@li...=20
> > https://lists.sourceforge.net/lists/listinfo/p> lib-users
> >
>=20
>=20
>=20
> -------------------------------------------------------
> This SF.net email is sponsored by: The Robotic Monkeys at=20
> ThinkGeek For a limited time only, get FREE Ground shipping=20
> on all orders of $35 or more. Hurry up and shop folks, this=20
> offer expires April 30th!=20
> http://www.thinkgeek.com/freeshipping/?cpg=12297
>=20
> _______________________________________________
> plib-users mailing list
> pli...@li...=20
> https://lists.sourceforge.net/lists/listinfo/p> lib-users
>=20
>=20
>=20
>=20
> -------------------------------------------------------
> This SF.net email is sponsored by: The Robotic Monkeys at=20
> ThinkGeek For a limited time only, get FREE Ground shipping=20
> on all orders of $35 or more. Hurry up and shop folks, this=20
> offer expires April 30th!=20
> http://www.thinkgeek.com/freeshipping/?cpg=12297
>=20
> _______________________________________________
> plib-users mailing list
> pli...@li...=20
> https://lists.sourceforge.net/lists/listinfo/p> lib-users
>=20

Re: [Plib-users] Identifying objects after loading an AC3D- modell

[Michael W. <mic...@ti...>]

Hi Paolo,
I understand what you mean and I agree. I have tried to walk through the
tree but not successfull.
Can you give me some lines of C/C++code how to do it ?
Best regards

Michael

----- Original Message -----=20
From: "Paolo Leoncini" <p.l...@ci...>
To: <pli...@li...>
Sent: Monday, April 26, 2004 9:59 AM
Subject: R: [Plib-users] Identifying objects after loading an AC3D- model=
l


Michael,

Is the problem setting custom properties for objects/materials?

The approach based on inline comments doesn't meet my favour since
a) it works only for ascii-text file (3D) formats such as AC3D,
b) needs of manual editing as you update the file (risk to loose such
addenda or to be enabled to do it only in its final version).

I'm in favour of this alternative solution:

A) manually write a simple text properties file - I use kinda .ini
format:

[property]
Object-name Params
...
[property]
Material-name Params
...

B) learn to parse your format, and, after having loaded the 3D data,
walk the graph by first identifying nodes by name (either objects or
materials, the getName() method works on both, and on non-states you
have also the getByName() utility) - all 3D formats allow to identifiy
objs/mats by a textual name - then setting node properties depending on
the directive in the file.

I use properties like envmap, mirror, no-lit (disable lighting), etc,
some acting on leafs and others on states.

This approach is not so heavy in the implementation, keeps 3D data and
custom properties separate, and works for all 3D data formats.

Greetings -

Paolo


> -----Messaggio originale-----
> Da: pli...@li...
> [mailto:pli...@li...] Per conto di
> Michael Wessels
> Inviato: venerd=EC 23 aprile 2004 18.47
> A: pli...@li...
> Oggetto: Re: [Plib-users] Identifying objects after loading
> an AC3D- modell
>
>
> Dear Steve,
> I have implemented what you said.
> But when I debug the application the code never jumps in the
> function ssgBranch *process_userdata ( char *data ) . My
> ac-file looks folowing:.
>
> AC3Db
> MATERIAL "ac3dmat1" rgb 1 1 1  amb 0.2 0.2 0.2  emis 0 0 0
> spec 0.5 0.5 0.5 shi 10  trans 0 MATERIAL "ac3dmat3" rgb 1 0
> 0  amb 0.2 0.2 0.2  emis 0 0 0  spec 0.5 0.5 0.5 shi 10
> trans 0 MATERIAL "ac3dmat7" rgb 0.270588 0.52549 0.454902
> amb 0.2 0.2 0.2  emis 0 0 0  spec 0.5 0.5 0.5  shi 10  trans
> 0 MATERIAL "ac3dmat9" rgb 0 0 1  amb 0.2 0.2 0.2  emis 0 0 0
> spec 0.5 0.5 0.5 shi 10  trans 0 MATERIAL "ac3dmat13" rgb
> 0.533333 0.533333 0.533333  amb 0.2 0.2 0.2  emis 0 0 0  spec
> 0.5 0.5 0.5  shi 10  trans 0 OBJECT world kids 2 OBJECT group
> name "Race-Course" loc 0.560112 0.0001 0.361112 kids 4 OBJECT
> poly name "poly" loc -0.240913 0 -0.282012 texture
> "ASSPHALT.bmp" texrep 10 10 numvert 10 -0.1712 0 -0.1475
> -0.0751 0 -0.1577 0.0686 0 -0.1675 0.2239 0 -0.1789 0.3284 0
> -0.1871 0.3219 0 -0.2051 0.1242 0 -0.1854 -0.0899 0 -0.1724
> -0.1744 0 -0.1613 -0.1744 0 -0.1613 numsurf 10
> ............... ................
>
> I attach the .ac-file to this mail.
> My intention is to seperate for example the
>
> OBJECT group
> name "Race-Course"
>
> as a single object from the rest.
> What can I do ?
>
> Best regards
>
> ----- Original Message -----=20
> From: "Steve Baker" <sjb...@ai...>
> To: <pli...@li...>
> Sent: Friday, March 26, 2004 3:35 AM
> Subject: Re: [Plib-users] Identifying objects after loading
> an AC3D- modell
>
>
> > Michael Wessels wrote:
> >
> > > in my '.ac' file I have the comment field "Tribune1". How
> can I tell
> > > the PLIB loaders to call a callback function in the
> application when
> > > they
> find
> > > this comment field ?
> >
> > Write a function like this:
> >
> >    ssgBranch *process_userdata ( char *data )
> >    {
> >      if ( data =3D=3D NULL || data [ 0 ] =3D=3D '\0' ) return NULL ;
> >
> >      if ( strncmp ( "Tribune1", data, strlen ( "Tribune1" ) ) =3D=3D =
0 )
> >      {
> >        ssgBranch *b =3D new ssgBranch () ;  /* ...or whatever
> you want
> > this
> node to be */
> >        /* whatever you need to do here */
> >        return b ;
> >      }
> >
> >      return NULL ;
> >    }
> >
> >
> > Sometime after ssgInit() but before you load your model:
> >
> >    ssgLoaderOptions *loader_opts =3D new ssgLoaderOptions () ;
> >    loader_opts -> setCreateBranchCallback ( process_userdata ) ;
> >    /* You may wish to set other loader options here */
> >    ssgSetCurrentOptions ( loader_opts ) ;
> >
> > ...then just load your model in the usual way and whenever
> SSG needs
> > to create a branch node, it'll call your 'process_userdata'
> > function with the comment as the parameter.   If this is a 'special'
> > node, then you create the node and return it as the result.
>  If it's
> > not special then just return NULL and the loader will do something
> > appropriate.
> >
> > ---------------------------- Steve Baker -------------------------
> > HomeEmail: <sjb...@ai...>    WorkEmail: <sj...@li...>
> > HomePage : http://www.sjbaker.org
> > Projects : http://plib.sf.net    http://tuxaqfh.sf.net
> >             http://tuxkart.sf.net http://prettypoly.sf.net
> -----BEGIN
> > GEEK CODE BLOCK----- GCS d-- s:+ a+ C++++$ UL+++$ P--- L++++$ E---=20
> > W+++ N o+ K? w--- !O M-
> > V-- PS++ PE- Y-- PGP-- t+ 5 X R+++ tv b++ DI++ D G+ e++ h--(-) r+++
> > y++++ -----END GEEK CODE BLOCK-----
> >
> >
> > -------------------------------------------------------
> > This SF.Net email is sponsored by: IBM Linux Tutorials
> > Free Linux tutorial presented by Daniel Robbins, President
> and CEO of
> > GenToo technologies. Learn everything from fundamentals to system
> >
> administration.http://ads.osdn.com/?ad_id=3D1470&alloc_id=3D3638&op=3Dc=
lick
> > _______________________________________________
> > plib-users mailing list
> > pli...@li...
> > https://lists.sourceforge.net/lists/listinfo/plib-users
>
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: The Robotic Monkeys at
> ThinkGeek For a limited time only, get FREE Ground shipping
> on all orders of $35 or more. Hurry up and shop folks, this
> offer expires April 30th!
> http://www.thinkgeek.com/freeshipping/?cpg=3D> 12297
>
> _______________________________________________
>
> plib-users mailing list
> pli...@li...
> https://lists.sourceforge.net/lists/listinfo/p> lib-users
>



-------------------------------------------------------
This SF.net email is sponsored by: The Robotic Monkeys at ThinkGeek
For a limited time only, get FREE Ground shipping on all orders of $35
or more. Hurry up and shop folks, this offer expires April 30th!
http://www.thinkgeek.com/freeshipping/?cpg=12297
_______________________________________________
plib-users mailing list
pli...@li...
https://lists.sourceforge.net/lists/listinfo/plib-users

R: [Plib-users] Identifying objects after loading an AC3D- modell

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

Michael,

Is the problem setting custom properties for objects/materials?

The approach based on inline comments doesn't meet my favour since
a) it works only for ascii-text file (3D) formats such as AC3D,
b) needs of manual editing as you update the file (risk to loose such
addenda or to be enabled to do it only in its final version).

I'm in favour of this alternative solution:

A) manually write a simple text properties file - I use kinda .ini
format:

[property]
Object-name Params
...
[property]
Material-name Params
...

B) learn to parse your format, and, after having loaded the 3D data,
walk the graph by first identifying nodes by name (either objects or
materials, the getName() method works on both, and on non-states you
have also the getByName() utility) - all 3D formats allow to identifiy
objs/mats by a textual name - then setting node properties depending on
the directive in the file.

I use properties like envmap, mirror, no-lit (disable lighting), etc,
some acting on leafs and others on states.

This approach is not so heavy in the implementation, keeps 3D data and
custom properties separate, and works for all 3D data formats.

Greetings -

Paolo


> -----Messaggio originale-----
> Da: pli...@li...=20
> [mailto:pli...@li...] Per conto di=20
> Michael Wessels
> Inviato: venerd=EC 23 aprile 2004 18.47
> A: pli...@li...
> Oggetto: Re: [Plib-users] Identifying objects after loading=20
> an AC3D- modell
>=20
>=20
> Dear Steve,
> I have implemented what you said.
> But when I debug the application the code never jumps in the=20
> function ssgBranch *process_userdata ( char *data ) . My=20
> ac-file looks folowing:.
>=20
> AC3Db
> MATERIAL "ac3dmat1" rgb 1 1 1  amb 0.2 0.2 0.2  emis 0 0 0 =20
> spec 0.5 0.5 0.5 shi 10  trans 0 MATERIAL "ac3dmat3" rgb 1 0=20
> 0  amb 0.2 0.2 0.2  emis 0 0 0  spec 0.5 0.5 0.5 shi 10 =20
> trans 0 MATERIAL "ac3dmat7" rgb 0.270588 0.52549 0.454902 =20
> amb 0.2 0.2 0.2  emis 0 0 0  spec 0.5 0.5 0.5  shi 10  trans=20
> 0 MATERIAL "ac3dmat9" rgb 0 0 1  amb 0.2 0.2 0.2  emis 0 0 0 =20
> spec 0.5 0.5 0.5 shi 10  trans 0 MATERIAL "ac3dmat13" rgb=20
> 0.533333 0.533333 0.533333  amb 0.2 0.2 0.2  emis 0 0 0  spec=20
> 0.5 0.5 0.5  shi 10  trans 0 OBJECT world kids 2 OBJECT group=20
> name "Race-Course" loc 0.560112 0.0001 0.361112 kids 4 OBJECT=20
> poly name "poly" loc -0.240913 0 -0.282012 texture=20
> "ASSPHALT.bmp" texrep 10 10 numvert 10 -0.1712 0 -0.1475=20
> -0.0751 0 -0.1577 0.0686 0 -0.1675 0.2239 0 -0.1789 0.3284 0=20
> -0.1871 0.3219 0 -0.2051 0.1242 0 -0.1854 -0.0899 0 -0.1724=20
> -0.1744 0 -0.1613 -0.1744 0 -0.1613 numsurf 10=20
> ............... ................
>=20
> I attach the .ac-file to this mail.
> My intention is to seperate for example the
>=20
> OBJECT group
> name "Race-Course"
>=20
> as a single object from the rest.
> What can I do ?
>=20
> Best regards
>=20
> ----- Original Message -----=20
> From: "Steve Baker" <sjb...@ai...>
> To: <pli...@li...>
> Sent: Friday, March 26, 2004 3:35 AM
> Subject: Re: [Plib-users] Identifying objects after loading=20
> an AC3D- modell
>=20
>=20
> > Michael Wessels wrote:
> >
> > > in my '.ac' file I have the comment field "Tribune1". How=20
> can I tell=20
> > > the PLIB loaders to call a callback function in the=20
> application when=20
> > > they
> find
> > > this comment field ?
> >
> > Write a function like this:
> >
> >    ssgBranch *process_userdata ( char *data )
> >    {
> >      if ( data =3D=3D NULL || data [ 0 ] =3D=3D '\0' ) return NULL ;
> >
> >      if ( strncmp ( "Tribune1", data, strlen ( "Tribune1" ) ) =3D=3D =
0 )
> >      {
> >        ssgBranch *b =3D new ssgBranch () ;  /* ...or whatever=20
> you want=20
> > this
> node to be */
> >        /* whatever you need to do here */
> >        return b ;
> >      }
> >
> >      return NULL ;
> >    }
> >
> >
> > Sometime after ssgInit() but before you load your model:
> >
> >    ssgLoaderOptions *loader_opts =3D new ssgLoaderOptions () ;
> >    loader_opts -> setCreateBranchCallback ( process_userdata ) ;
> >    /* You may wish to set other loader options here */
> >    ssgSetCurrentOptions ( loader_opts ) ;
> >
> > ...then just load your model in the usual way and whenever=20
> SSG needs=20
> > to create a branch node, it'll call your 'process_userdata'
> > function with the comment as the parameter.   If this is a 'special'
> > node, then you create the node and return it as the result.=20
>  If it's=20
> > not special then just return NULL and the loader will do something=20
> > appropriate.
> >
> > ---------------------------- Steve Baker -------------------------
> > HomeEmail: <sjb...@ai...>    WorkEmail: <sj...@li...>
> > HomePage : http://www.sjbaker.org
> > Projects : http://plib.sf.net    http://tuxaqfh.sf.net
> >             http://tuxkart.sf.net http://prettypoly.sf.net=20
> -----BEGIN=20
> > GEEK CODE BLOCK----- GCS d-- s:+ a+ C++++$ UL+++$ P--- L++++$ E---=20
> > W+++ N o+ K? w--- !O M-
> > V-- PS++ PE- Y-- PGP-- t+ 5 X R+++ tv b++ DI++ D G+ e++ h--(-) r+++=20
> > y++++ -----END GEEK CODE BLOCK-----
> >
> >
> > -------------------------------------------------------
> > This SF.Net email is sponsored by: IBM Linux Tutorials
> > Free Linux tutorial presented by Daniel Robbins, President=20
> and CEO of=20
> > GenToo technologies. Learn everything from fundamentals to system=20
> >=20
> =
administration.http://ads.osdn.com/?ad_id=3D1470&alloc_id=3D3638&op=3Dcli=
ck
> > _______________________________________________
> > plib-users mailing list
> > pli...@li...=20
> > https://lists.sourceforge.net/lists/listinfo/plib-users
>=20
>=20
>=20
> -------------------------------------------------------
> This SF.net email is sponsored by: The Robotic Monkeys at=20
> ThinkGeek For a limited time only, get FREE Ground shipping=20
> on all orders of $35 or more. Hurry up and shop folks, this=20
> offer expires April 30th!=20
> http://www.thinkgeek.com/freeshipping/?cpg=3D> 12297
>=20
> _______________________________________________
>=20
> plib-users mailing list
> pli...@li...=20
> https://lists.sourceforge.net/lists/listinfo/p> lib-users
>=20

[Plib-users] load 3ds

[lahiani m. <lah...@cs...>]

Hello

 1. I try to write class that use like interface . I mean  the class load 3ds object and the user can ask for :
GetVertexes() ------ return vector ( or something else) with all the vertexes  
GetNormals()--------return vector with all the normals
GetPolygon()--------return all the polygon that make the object
And so on...
The constractor look like:

     ssgEntity *obj
     ssgRoot scene;

Parser(file_name)
{
     obj =  ssgLoad3ds(file_name);
     scene -> addKid ( obj ) ;
     some other things
}

now I want to  use object and get all the vertex text coordinate normal ...
how can I do it ???????
how can I search at the tree?????

i try to use this func to print all to file but it isn't work good
what the meaning of the int 12 in leaf -> print(fdest2,"",12);

void parseFile::readScene(ssgEntity* e)
{
	if ( e -> isAKindOf ( ssgTypeBranch() ) )
	{
		ssgBranch *br = (ssgBranch *) e ;
		for ( int i = 0 ; i < br -> getNumKids () ; i++ )
		{
			 readScene ( (ssgEntity*)br -> getKid ( i ) ) ;
		}
	}
	else if ( e -> isAKindOf ( ssgTypeLeaf() ) )
	{
		ssgLeaf* leaf = (ssgLeaf *) e ;
		//e->print();
		leaf -> print(fdest2,"",12);

	}

}

2. if I have 3ds object let say cub that each vertex in different color. 
How can I get the color of each vertex.  


Thanks 
Moti lahiani

Re: [Plib-users] Identifying objects after loading an AC3D- modell

[Michael W. <mic...@ti...>]

Dear Steve,
I have implemented what you said.
But when I debug the application the code never jumps in the function
ssgBranch *process_userdata ( char *data ) .
My ac-file looks folowing:.

AC3Db
MATERIAL "ac3dmat1" rgb 1 1 1  amb 0.2 0.2 0.2  emis 0 0 0  spec 0.5 0.5 0.5
shi 10  trans 0
MATERIAL "ac3dmat3" rgb 1 0 0  amb 0.2 0.2 0.2  emis 0 0 0  spec 0.5 0.5 0.5
shi 10  trans 0
MATERIAL "ac3dmat7" rgb 0.270588 0.52549 0.454902  amb 0.2 0.2 0.2  emis 0 0
0  spec 0.5 0.5 0.5  shi 10  trans 0
MATERIAL "ac3dmat9" rgb 0 0 1  amb 0.2 0.2 0.2  emis 0 0 0  spec 0.5 0.5 0.5
shi 10  trans 0
MATERIAL "ac3dmat13" rgb 0.533333 0.533333 0.533333  amb 0.2 0.2 0.2  emis 0
0 0  spec 0.5 0.5 0.5  shi 10  trans 0
OBJECT world
kids 2
OBJECT group
name "Race-Course"
loc 0.560112 0.0001 0.361112
kids 4
OBJECT poly
name "poly"
loc -0.240913 0 -0.282012
texture "ASSPHALT.bmp"
texrep 10 10
numvert 10
-0.1712 0 -0.1475
-0.0751 0 -0.1577
0.0686 0 -0.1675
0.2239 0 -0.1789
0.3284 0 -0.1871
0.3219 0 -0.2051
0.1242 0 -0.1854
-0.0899 0 -0.1724
-0.1744 0 -0.1613
-0.1744 0 -0.1613
numsurf 10
...............
................

I attach the .ac-file to this mail.
My intention is to seperate for example the

OBJECT group
name "Race-Course"

as a single object from the rest.
What can I do ?

Best regards

----- Original Message ----- 
From: "Steve Baker" <sjb...@ai...>
To: <pli...@li...>
Sent: Friday, March 26, 2004 3:35 AM
Subject: Re: [Plib-users] Identifying objects after loading an AC3D- modell


> Michael Wessels wrote:
>
> > in my '.ac' file I have the comment field "Tribune1". How can I tell the
> > PLIB loaders to call a callback function in the application when they
find
> > this comment field ?
>
> Write a function like this:
>
>    ssgBranch *process_userdata ( char *data )
>    {
>      if ( data == NULL || data [ 0 ] == '\0' ) return NULL ;
>
>      if ( strncmp ( "Tribune1", data, strlen ( "Tribune1" ) ) == 0 )
>      {
>        ssgBranch *b = new ssgBranch () ;  /* ...or whatever you want this
node to be */
>        /* whatever you need to do here */
>        return b ;
>      }
>
>      return NULL ;
>    }
>
>
> Sometime after ssgInit() but before you load your model:
>
>    ssgLoaderOptions *loader_opts = new ssgLoaderOptions () ;
>    loader_opts -> setCreateBranchCallback ( process_userdata ) ;
>    /* You may wish to set other loader options here */
>    ssgSetCurrentOptions ( loader_opts ) ;
>
> ...then just load your model in the usual way and whenever SSG
> needs to create a branch node, it'll call your 'process_userdata'
> function with the comment as the parameter.   If this is a 'special'
> node, then you create the node and return it as the result.  If it's
> not special then just return NULL and the loader will do something
> appropriate.
>
> ---------------------------- Steve Baker -------------------------
> HomeEmail: <sjb...@ai...>    WorkEmail: <sj...@li...>
> HomePage : http://www.sjbaker.org
> Projects : http://plib.sf.net    http://tuxaqfh.sf.net
>             http://tuxkart.sf.net http://prettypoly.sf.net
> -----BEGIN GEEK CODE BLOCK-----
> GCS d-- s:+ a+ C++++$ UL+++$ P--- L++++$ E--- W+++ N o+ K? w--- !O M-
> V-- PS++ PE- Y-- PGP-- t+ 5 X R+++ tv b++ DI++ D G+ e++ h--(-) r+++ y++++
> -----END GEEK CODE BLOCK-----
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by: IBM Linux Tutorials
> Free Linux tutorial presented by Daniel Robbins, President and CEO of
> GenToo technologies. Learn everything from fundamentals to system
> administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click
> _______________________________________________
> plib-users mailing list
> pli...@li...
> https://lists.sourceforge.net/lists/listinfo/plib-users

Re: [Plib-users] ssgMakeMipMaps

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

jnilson_99 wrote:
> i think you're missing the point. an image doesn't need to be sized based on
> a power of two. only MIPMAPS need to be sized to a power of 2.

No - that's not true.  Even top level maps - or non-MIPmapped textures must be
a power of two in size in each dimension.

According to the RedBook description of glTexImage2D:

   "The width and height parameters give the dimensions of the texture
    image; border indicates the width of the border, which is either
    zero (no border) or one.  Both width and height must have the form
    2^m + 2b, where m is a nonnegative inteager (which can have a different
    value for width than for height) and b is the value of border."

...so, presuming you aren't using a one pixel border, your map has to be
a power of two in both dimensions....no exceptions.

You *might* get away with it in some (broken) OpenGL implementations - but
it's definitely not legal and if your OpenGL library doesn't report a
GL_INVALID_VALUE error when you do it - then there is a definite bug in
your OpenGL library because the specification of that functions says it
MUST produce that error.

---------------------------- Steve Baker -------------------------
HomeEmail: <sjb...@ai...>    WorkEmail: <sj...@li...>
HomePage : http://www.sjbaker.org
Projects : http://plib.sf.net    http://tuxaqfh.sf.net
            http://tuxkart.sf.net http://prettypoly.sf.net
-----BEGIN GEEK CODE BLOCK-----
GCS d-- s:+ a+ C++++$ UL+++$ P--- L++++$ E--- W+++ N o+ K? w--- !O M-
V-- PS++ PE- Y-- PGP-- t+ 5 X R+++ tv b++ DI++ D G+ e++ h--(-) r+++ y++++
-----END GEEK CODE BLOCK-----

Re: [Plib-users] ssgMakeMipMaps

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

Wolfram Kuss wrote:
>>i would like to avoid having to resize my image to something like 256X256.
> 
> 
> You should DEFINITELY resize it. Computer graphics hardware needs
> power of two. The only ways for a program to allow non-.power-of-two
> are
> a) don't use hardware accelaration

Well, even without hardware accelleration, you still need a power-of-two
map if you are using software-only OpenGL.   The only way out would be
not to use OpenGL and rasterize the image yourself - but that's a ridiculous choice.

> b) resize it yourself, during each session
> Both obviously bad.

Well, (b) may be less than optimal - but it's not *that* bad.

Actually, there is an OpenGL extension that allows you to use non-power-of-two
textures on nVidia hardware - but there are a lot of really weird restrictions.

Trust me - you NEED powers of two map dimensions.

> Resizing it once "offline" with a good program, that can use a good
> algorithm since it can take a second, is a much better idea. 

Yep.

---------------------------- Steve Baker -------------------------
HomeEmail: <sjb...@ai...>    WorkEmail: <sj...@li...>
HomePage : http://www.sjbaker.org
Projects : http://plib.sf.net    http://tuxaqfh.sf.net
            http://tuxkart.sf.net http://prettypoly.sf.net
-----BEGIN GEEK CODE BLOCK-----
GCS d-- s:+ a+ C++++$ UL+++$ P--- L++++$ E--- W+++ N o+ K? w--- !O M-
V-- PS++ PE- Y-- PGP-- t+ 5 X R+++ tv b++ DI++ D G+ e++ h--(-) r+++ y++++
-----END GEEK CODE BLOCK-----

Re: [Plib-users] ssgMakeMipMaps

[jnilson_99 <jni...@ya...>]

i think you're missing the point. an image doesn't need to be sized based on
a power of two. only MIPMAPS need to be sized to a power of 2.

i got around my problem by creating my own class that extends ssgTexture and
loads the image on its own.

it looks like ssgTexture was once set up to create mipmaps, hence the
boolean mipmap parameter in the following method:

ssgTexture::ssgTexture ( const char *fname, int _wrapu, int _wrapv, int
_mipmap )

i assume the parameter is there to flag ssgLoadTexture whether to create a
mipmap after loading the texture. right now it assumes you want to create a
mipmap out of EVERY texture you load. this is incorrect in my opinion.

john

----- Original Message ----- 
From: "Wolfram Kuss" <w_...@rz...>
To: <pli...@li...>
Sent: Thursday, April 22, 2004 6:16 PM
Subject: Re: [Plib-users] ssgMakeMipMaps


>i would like to avoid having to resize my image to something like 256X256.

You should DEFINITELY resize it. Computer graphics hardware needs
power of two. The only ways for a program to allow non-.power-of-two
are
a) don't use hardware accelaration
b) resize it yourself, during each session
Both obviously bad.

Resizing it once "offline" with a good program, that can use a good
algorithm since it can take a second, is a much better idea.

>
>thanks
>
>john

Bye bye,
Wolfram.



-------------------------------------------------------
This SF.net email is sponsored by: The Robotic Monkeys at ThinkGeek
For a limited time only, get FREE Ground shipping on all orders of $35
or more. Hurry up and shop folks, this offer expires April 30th!
http://www.thinkgeek.com/freeshipping/?cpg297
_______________________________________________
plib-users mailing list
pli...@li...
https://lists.sourceforge.net/lists/listinfo/plib-users

Re: [Plib-users] ssgMakeMipMaps

[Wolfram K. <w_...@rz...>]

>i would like to avoid having to resize my image to something like =
256X256.

You should DEFINITELY resize it. Computer graphics hardware needs
power of two. The only ways for a program to allow non-.power-of-two
are
a) don't use hardware accelaration
b) resize it yourself, during each session
Both obviously bad.

Resizing it once "offline" with a good program, that can use a good
algorithm since it can take a second, is a much better idea.=20

>
>thanks
>
>john

Bye bye,
Wolfram.

R: [Plib-users] ssg physics

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

Simon,

It's a pity to have missed/underevaluated the topic in the list, infact
this is a cool topic for me presently.

I'm in the process of first-evaluating-then-start-designing an interface
(of Plib-SSG) with OpenDE (formerly ODE) - Open Dynamics Engine. The
idea is to introduce in my Plib-based viewer the ability to realisticly
manipulate CAD originated geometries with a CyberGlove, which the viewer
is already interfaced to. In this case gravitiy or spring-based
action/reaction is not sufficient, so the choice of the "hard work" with
OpenDE.

In the rest of this talk I'll suppose you have a minimum SSG knowledge,
otherwise I could have misunderstood the quest for the call.

About the how-to, you can link whatever information to SSG nodes by
set/getting the userdata: this is actually a pointer to a ssgEntity, so
if you subclass from both ssgEntity and your nodedata class, you can
pass it to those methods cleanly (no cast, please) and get ref counting.

However the userdata is a way to make a node points to some information,
so in this it's a "passive" mechanism. For getting something "active"
consider using the node callbacks. Depending on the type of node there
are pre/post draw, pre/post traversal, and, for state nodes there's just
an apply-time callback. A limitation is that only one pre-somethig and
one post-something callback per node can be set, so, for example in my
application I have no callback slot free. We should extend this useful
mechanism in 2.0 to multiple callbacks of the same type, isn't it? It
shouldn't add performance penality.

Regarding how to get the geometry off a ssgLeaf, proper get methods are
available in the class for this. Usually collision detection is the only
part of a physics engine where object geometry is taken into account,
so, especially if you have complex geometries, an efficient way to pass
scene graph meshes to the engine is key to memory consumption. Depending
on how the geometry is collected by the physics engine, simple pointers
to graphs' vertices/triangle indices structures could suffice (optimal
case - no duplication), or an actual translation in engine's mesh format
could require data duplication. If you are designing your own engine, of
course consider not duplicating and complain to the low-level arrays
format.

For both the tasks a depth walk into a ssg will be needed in the
pre-processing phase (once in the program execution) for establishing
the needed cross-pointer network between the scene graph and the engine.
A simple recursive function does acomplish the task - should you need
one just ask it me.

Finally there are methods in the ssgTransform nodes (the "father" of the
array of leafs which contains the actual object geometry) to set
transformation for the sub-graph nodes. So after your engine has
determined the new position for an object you can set it by one of the
multiple ways to set transformation data (position and/or orientation,
the whole 4x4 matrix, and converting from/to quaternions through the SG
library functions). Note that for data loaded by the 3DS loader, and
most other ssg loader I think, the setName method does point to an
ssgTransform, i.e. an object "starts" from the parent transformation
node of its geometry.

My opinion is that the physics engine *can* be "external" to the scene
graph class, and some "wrapping" layer could put the engine in
communication with the graph. But I could change opinion in the progress
of my problem analysis. My last effort has been to make nvidia hardware
shadow mapping to work with SSG, and, despite of thinking it could have
a strict relation with ssgCullAndDraw internals, I call it but I didn't
modified it or wrote my own.

Nice to come back on this topic -

Paolo


-----Messaggio originale-----
Da: pli...@li...
[mailto:pli...@li...] Per conto di Simon
Inviato: gioved=EC 22 aprile 2004 8.29
A: pli...@li...
Oggetto: [Plib-users] ssg physics


Hi, heres a summary of it all:

I said - Hi, a while ago I posted about trying to hook up a physics
engine to ssg.  I don=92t recall getting any replies.  I was wondering =
if
someone could give me an over view of how they go about adding things
like gravity to each object.  I have the feeling that I=92m missing
something really basic.

Wolfram said - Normally, you do something like this per iteration of the
physics
engine:

calc forces=20
convert to accelaration
speed =3D speed + accelaration * deltatime
position =3D position + speed  * deltatime

In your case, accelaration is constant

Then I said - Hi, thanks Wolfram its great to get a reply although I
don=92t think I explained myself very well.  The aim I=92m trying to =
reach
is to have a stack of blocks on top of each other.  I then want to knock
them down.  I found this great physics example to do with dice falling
down some stairs.   I can get it to work with a non plib scene but I was
trying to link it to an ssg tree.   What I really want to know is how
everyone goes about that. =20

In the non plib demo each object maintains a set of physics related
properties.  There is also a physics class that each inherits from.
Basically the physics engine runs constantly and checks then updates
each object in relation to each other object.  I think in just writing
this I am beginning to work the answer out myself.  Isnt it funny how
sometimes just writing or saying something out loud can make things so
much clearer.

So now I guess the question is should the physics engine class be added
to the tree or left to run outside of it?  It=92s a little difficult for
me to recall everything as the project has been on hold until this bit
gets worked out.  For anyone interested; the demo that I=92m basing this
on for now is from Chris Haag.  I got it off his site originally but
that seems to be down at the moment.  Theres a copy of it on the NeHe
site:

http://nehe.gamedev.net/data/downloads/download.asp?letter=3DS

It=92s called Stairs by Chris Haag.

Thanks for the patience, if I get it to work then I could submit it as
an ssg example.  I=92m using the 3D Studio loader for the dice and the
stairs so the example would incorporate that as well.

At that point Adam said - (Feel free to correctme here guys.. )
My understanding is that with game design,  the graphics engine (which=20
utilized the scene graph) and the physiscs engines are kept separate.
An=20
object in question (say a car or a block in your example) has access to
both=20
a physics model that represents it's behavior, as well as a pointer to
it's=20
relevant information in the scene graph.  That way, everytime you update
an=20
object, it gathers information from it's current state and the physics=20
model, and then uses that information to manupulate it's characteristics

within the scene graph.

And that=92s when I sent the mail that you got and didn=92t know what it =
was
about.

[Plib-users] ssg physics

[Simon <sim...@ho...>]

Hi, heres a summary of it all:

=20

I said - Hi, a while ago I posted about trying to hook up a physics =
engine
to ssg.  I don't recall getting any replies.  I was wondering if someone
could give me an over view of how they go about adding things like =
gravity
to each object.  I have the feeling that I'm missing something really =
basic.

=20

Wolfram said - Normally, you do something like this per iteration of the
physics

engine:

=20

calc forces=20

convert to accelaration

speed =3D speed + accelaration * deltatime

position =3D position + speed  * deltatime

=20

In your case, accelaration is constant

=20

Then I said - Hi, thanks Wolfram its great to get a reply although I =
don't
think I explained myself very well.  The aim I'm trying to reach is to =
have
a stack of blocks on top of each other.  I then want to knock them down. =
 I
found this great physics example to do with dice falling down some =
stairs.
I can get it to work with a non plib scene but I was trying to link it =
to an
ssg tree.   What I really want to know is how everyone goes about that.  =


=20

In the non plib demo each object maintains a set of physics related
properties.  There is also a physics class that each inherits from.
Basically the physics engine runs constantly and checks then updates =
each
object in relation to each other object.  I think in just writing this I =
am
beginning to work the answer out myself.  Isnt it funny how sometimes =
just
writing or saying something out loud can make things so much clearer.

=20

So now I guess the question is should the physics engine class be added =
to
the tree or left to run outside of it?  It's a little difficult for me =
to
recall everything as the project has been on hold until this bit gets =
worked
out.  For anyone interested; the demo that I'm basing this on for now is
from Chris Haag.  I got it off his site originally but that seems to be =
down
at the moment.  Theres a copy of it on the NeHe site:

=20

http://nehe.gamedev.net/data/downloads/download.asp?letter=3DS

=20

It's called Stairs by Chris Haag.

=20

Thanks for the patience, if I get it to work then I could submit it as =
an
ssg example.  I'm using the 3D Studio loader for the dice and the stairs =
so
the example would incorporate that as well.

=20

At that point Adam said - (Feel free to correctme here guys.. )

My understanding is that with game design,  the graphics engine (which=20

utilized the scene graph) and the physiscs engines are kept separate.  =
An=20

object in question (say a car or a block in your example) has access to =
both


a physics model that represents it's behavior, as well as a pointer to =
it's=20

relevant information in the scene graph.  That way, everytime you update =
an=20

object, it gathers information from it's current state and the physics=20

model, and then uses that information to manupulate it's characteristics =


within the scene graph.

=20

And that's when I sent the mail that you got and didn't know what it was
about.

[Plib-users] ssgMakeMipMaps

[jnilson_99 <jni...@ya...>]

from ssgMakeMipMaps :

if ( ! ((xsize & (xsize-1))=3D=3D0) ||
! ((ysize & (ysize-1))=3D=3D0) )
{
ulSetError ( UL_WARNING, "Map is not a power-of-two in size!" ) ;
return false ;
}

i've used 3dstudio to build a model, but one of the textures' size is =
not a multiple of 2 so ssgMakeMipMaps won't create a mipmap out of it. =
this isn't a big deal because i don't need to create a mipmap out of =
this particular image, just the default resolution of the image is all i =
need.


question: is there a way to have ssg load an image without automatically =
trying to create a mipmap as well?=20

i would like to avoid having to resize my image to something like =
256X256.

thanks

john

Re: [Plib-users] ssg physics

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

Simon wrote:
> Hi, well Adam summed it all up for me quite well.  Thank you it=92s rea=
lly
> appreciated.  Now back to the drawing board to rework everything :=AC)

Eh?

Have I missed some conversation here?   What are you talking about?

---------------------------- Steve Baker -------------------------
HomeEmail: <sjb...@ai...>    WorkEmail: <sj...@li...>
HomePage : http://www.sjbaker.org
Projects : http://plib.sf.net    http://tuxaqfh.sf.net
            http://tuxkart.sf.net http://prettypoly.sf.net
-----BEGIN GEEK CODE BLOCK-----
GCS d-- s:+ a+ C++++$ UL+++$ P--- L++++$ E--- W+++ N o+ K? w--- !O M-
V-- PS++ PE- Y-- PGP-- t+ 5 X R+++ tv b++ DI++ D G+ e++ h--(-) r+++ y++++=

-----END GEEK CODE BLOCK-----

[Plib-users] pui help

[Brian S. <sch...@ho...>]

I'm having a little trouble with the puComboBox, puSelectBox, and 
puButtonBox,  I'm pretty positive it has to be with the array of strings I 
am sending it.  here is how I construct the array:

char *arrayOfStrings() = {"How", "Are", "You",NULL};

then declaring each of these puObjects I use arrayOfStrings as the parameter 
for the list.  Is this how the array of Strings is supposed to be 
constructed?  For puSelectBox I the list is showing correctly however when I 
click on a selection it won't register (I do have puMouse in my mouse func) 
and if I hit page down the list will pop up, but if I hit down I get an 
access violation.

For puSelectBox, it shows the first element fine, but if I click on the 
arrow I get the same access violation error.

Finally for puButtonBox the program will crash once it tries to display it 
with an access violation.  It has to be the way I'm constructing my array, 
please let me know how your really supposed to do it.  Thanks in advance

-Brain

_________________________________________________________________
Lose those love handles! MSN Fitness shows you two moves to slim your waist. 
http://fitness.msn.com/articles/feeds/article.aspx?dept=exercise&article=et_pv_030104_lovehandles