headers
Gernot Ziegler | 14 Jan 2006 14:21
Picon
Picon
Picon
Favicon

Camera view interpolation

Hej folks !

I have a number of OpenGL modelview matrices that describe a number of
cameras, and would like to interpolate between the camera views along
a time track using Lib3DS - which approach would you recommend:
.) Creating camera objects and everything needed for it
.) Simple objects, and transforming the matrices into position and
rotation tracks ? (or is that needed above, too ?)
.) only use lib3ds' quaternions and their slerp function, do the rest
myself

glad for any hints you can give me :-)

Servus,
  Gernot

--

-- 
T----------------------------W-E-L-C-O-M-E------------------------------T
O  The Austria <=> Sweden <=> Germany <=> Netherlands connection.....   H
|  http://www.mpi-sb.mpg.de/~gziegler | http://www.lysator.liu.se/~gz   E
\-----------------------------F-U-T-U-R-E-------------------------------/

-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems?  Stop!  Download the new AJAX search engine that makes
searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click
Permalink | Reply | 2 comments |
headers
Hylke Donker | 14 Jan 2006 18:16
Picon
Favicon

RE: Camera view interpolation

If i'm correct, the first option is faster than the second option.I don't 
know about the third option.
Hylke

From: Gernot Ziegler <gz@...>
Reply-To: lib3ds-devel@...
To: lib3ds-devel@...
Subject: [Lib3ds-devel] Camera view interpolation
Date: Sat, 14 Jan 2006 14:21:55 +0100 (MET)
MIME-Version: 1.0
Received: from lists-outbound.sourceforge.net ([66.35.250.225]) by 
bay0-mc4-f5.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.211); Sat, 14 
Jan 2006 05:23:00 -0800
Received: from sc8-sf-list1-b.sourceforge.net 
(sc8-sf-list1-b.sourceforge.net [10.3.1.7])by sc8-sf-spam1.sourceforge.net 
(Postfix) with ESMTPid 02E4388527; Sat, 14 Jan 2006 05:23:01 -0800 (PST)
Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] 
helo=mail.sourceforge.net)by sc8-sf-list1.sourceforge.net with esmtp (Exim 
4.30)id 1ExlM5-00009p-CPfor lib3ds-devel@...;
Sat, 14 Jan 
2006 05:22:05 -0800
Received: from mail.lysator.liu.se ([130.236.254.3])by mail.sourceforge.net 
with esmtps (TLSv1:AES256-SHA:256)(Exim 4.44)id 1ExlM3-0002Ek-Uyfor 
lib3ds-devel@...; Sat, 14 Jan 2006 05:22:05 -0800
Received: from localhost (localhost.localdomain [127.0.0.1])by 
mail.lysator.liu.se (Postfix) with ESMTP id 812E6200A218for 
<lib3ds-devel@...>; Sat, 14 Jan 2006 14:21:57
+0100 (CET)
Received: from mail.lysator.liu.se ([127.0.0.1])by localhost 
(lenin.lysator.liu.se [127.0.0.1]) (amavisd-new, port 10024)with LMTP id
(Continue reading)

Permalink | Reply | 1 comment |
headers
Federico Mazzanti | 20 Jan 2006 15:54
Picon
Favicon

question coord texture

Hi,

I little use the lib3ds library from time and not clearly as they come 
managed the coordinates of texture.

mesh->points = number of vertex
mesh->pointL[] = vertexs

mesh->faces = number of faces
mesh->faceL[] = faces

mesh->texels = number of coordinated of texture
mesh->texelL[ ] = coord texture

mesh->material->texture1_map.name = name of the file contentente the 
texture.

my question is following:

how I can associate the coordinates of texture to the faces?

thanks.

Federico Mazzanti

-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems?  Stop!  Download the new AJAX search engine that makes
searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642
(Continue reading)

Permalink | Reply | 1 comment |
headers
Hylke Donker | 20 Jan 2006 16:17
Picon
Favicon

RE: question coord texture

face->points[x] gives you the right index for mesh->pointL.
You might also wanna check out:
http://lib3ds.sourceforge.net/lib3ds-1.2.0/doc/html/struct__Lib3dsFace.html
Hylke

From: Federico Mazzanti <fmazzant@...>
Reply-To: lib3ds-devel@...
To: lib3ds-devel@...
Subject: [Lib3ds-devel] question coord texture
Date: Fri, 20 Jan 2006 15:54:16 +0100
MIME-Version: 1.0
Received: from lists-outbound.sourceforge.net ([66.35.250.225]) by 
bay0-mc9-f5.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.211); Fri, 20 
Jan 2006 06:55:12 -0800
Received: from sc8-sf-list1-b.sourceforge.net 
(sc8-sf-list1-b.sourceforge.net [10.3.1.7])by sc8-sf-spam2.sourceforge.net 
(Postfix) with ESMTPid 2BB101242B; Fri, 20 Jan 2006 06:55:09 -0800 (PST)
Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] 
helo=mail.sourceforge.net)by sc8-sf-list1.sourceforge.net with esmtp (Exim 
4.30)id 1Ezxer-0005ld-4Sfor lib3ds-devel@...;
Fri, 20 Jan 
2006 06:54:33 -0800
Received: from host245-163.pool80104.interbusiness.it ([80.104.163.245] 
helo=pinguino.fmazzant.it)by mail.sourceforge.net with esmtp (Exim 4.44)id 
1Ezxek-0000sA-8Ufor lib3ds-devel@...; Fri, 20
Jan 2006 
06:54:33 -0800
Received: from [192.168.0.2] (pinguino02.fmazzant.it [192.168.0.2])by 
pinguino.fmazzant.it (8.13.5/8.12.11) with ESMTP id k0KEs7bn020795for 
<lib3ds-devel@...>; Fri, 20 Jan 2006 15:54:08 +0100
(Continue reading)

Permalink | Reply | 0 comments |
headers
Gernot Ziegler | 22 Jan 2006 04:52
Picon
Picon
Picon
Favicon

RE: Camera view interpolation

Hej !

Thanks, I did it in the second option:
I first feed the vectors (0,0,0), (0,0,-1) and (0,1,0) to the inverse of
the modelview matrix of the camera, and got a camera position, a target,
and an up position which I could then interpolate using a cam node, a
target node and a second target node for the up vector.

Afterwards, I just extract the interpolated values, feed them to gluLookAt
(up replaces roll) and voila ! a nice camera track .-)

Created nodes for the camera
position, a target and

> If i'm correct, the first option is faster than the second option.I don't
> know about the third option.
> I have a number of OpenGL modelview matrices that describe a number of
> cameras, and would like to interpolate between the camera views along
> a time track using Lib3DS - which approach would you recommend:
> .) Creating camera objects and everything needed for it
> .) Simple objects, and transforming the matrices into position and
> rotation tracks ? (or is that needed above, too ?)
> .) only use lib3ds' quaternions and their slerp function, do the rest
> myself
>
> glad for any hints you can give me :-)
>
> Servus,
>    Gernot
>
(Continue reading)

Permalink | Reply | 0 comments |
headers
mal content | 25 Jan 2006 13:36

player shows blank window

Using lib3ds 1.2.0, I can't get any output to the screen from 'player'.
I just get a blank, grey, window no matter what model I use. This
occurs on both FreeBSD 6 and OS X 10.3.9.

What exactly am I doing wrong?

I went into the 3D editor that I use (meshworks), created a plain
untextured cube and exported to 3DS. Ran player on the resulting
cube.3ds file and got a blank window. I have also tried other textured
and downloaded models.

3dsdump shows that lib3ds seems to be reading the file correctly,
so where does the problem lie? (Most likely behind the keyboard!)

thanks
a1

-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems?  Stop!  Download the new AJAX search engine that makes
searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid3432&bid#0486&dat1642
Permalink | Reply | 7 comments |
headers
Victor Gerth | 25 Jan 2006 18:54
Picon
Favicon

Re: player shows blank window

Here are my 2cents for debugging your problem.

Off the top of my head,  do you have any lights? Is the unit size your 
model wasconstructed in  adequate for your near far clipping on your camera?

mal content wrote:

>Using lib3ds 1.2.0, I can't get any output to the screen from 'player'.
>I just get a blank, grey, window no matter what model I use. This
>occurs on both FreeBSD 6 and OS X 10.3.9.
>
>What exactly am I doing wrong?
>
>I went into the 3D editor that I use (meshworks), created a plain
>untextured cube and exported to 3DS. Ran player on the resulting
>cube.3ds file and got a blank window. I have also tried other textured
>and downloaded models.
>
>3dsdump shows that lib3ds seems to be reading the file correctly,
>so where does the problem lie? (Most likely behind the keyboard!)
>
>thanks
>a1
>
>
>-------------------------------------------------------
>This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
>for problems?  Stop!  Download the new AJAX search engine that makes
>searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
>http://sel.as-us.falkag.net/sel?cmd=k&kid3432&bid#0486&dat1642
(Continue reading)

Permalink | Reply | 6 comments |
headers
Hylke Donker | 25 Jan 2006 21:17
Picon
Favicon

Re: player shows blank window

Also note that player.c doesn't support non-noded models. So if your model 
doesn't contain any nodes, your model will not be rendered.
Hylke

From: Victor Gerth <gerth@...>
Reply-To: lib3ds-devel@...
To: lib3ds-devel@...
Subject: Re: [Lib3ds-devel] player shows blank window
Date: Wed, 25 Jan 2006 10:54:06 -0700
MIME-Version: 1.0
Received: from lists-outbound.sourceforge.net ([66.35.250.225]) by 
bay0-mc2-f7.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.211); Wed, 25 
Jan 2006 09:57:11 -0800
Received: from sc8-sf-list1-b.sourceforge.net 
(sc8-sf-list1-b.sourceforge.net [10.3.1.7])by sc8-sf-spam1.sourceforge.net 
(Postfix) with ESMTPid 67AFD89F17; Wed, 25 Jan 2006 09:55:09 -0800 (PST)
Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] 
helo=mail.sourceforge.net)by sc8-sf-list1.sourceforge.net with esmtp (Exim 
4.30)id 1F1oqf-0000aj-Kwfor lib3ds-devel@...;
Wed, 25 Jan 
2006 09:54:25 -0800
Received: from mr1.ucalgary.ca ([136.159.34.165])by mail.sourceforge.net 
with esmtp (Exim 4.44)id 1F1oqe-0001aO-G1for 
lib3ds-devel@...; Wed, 25 Jan 2006 09:54:25 -0800
Received: from smtp1.ucalgary.ca (smtp1.ucalgary.ca [136.159.36.18])by 
mr1.ucalgary.ca (Postfix) with ESMTP id 487477ED7for 
<lib3ds-devel@...>; Wed, 25 Jan 2006 10:54:13
-0700 (MST)
Received: from [192.168.0.101] (sana-sa.cpsc.ucalgary.ca 
[136.159.7.231])(authenticated (0 bits))by smtp1.ucalgary.ca (8.11.7/8.11.6)
(Continue reading)

Permalink | Reply | 1 comment |
headers
mal content | 26 Jan 2006 15:27

Re: player shows blank window

On 1/25/06, Hylke Donker <hylkedonker@...> wrote:
> Also note that player.c doesn't support non-noded models. So if your model
> doesn't contain any nodes, your model will not be rendered.
> Hylke

Hello,

Sorry I don't understand the concept of nodes. I'm not well versed in
the internals
of 3DS yet. It's very likely, therefore, that my model doesn't contain any.

a1

-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems?  Stop!  Download the new AJAX search engine that makes
searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid3432&bid#0486&dat1642
Permalink | Reply | 0 comments |
headers
mal content | 26 Jan 2006 15:28

Re: player shows blank window

On 1/25/06, Victor Gerth <gerth@...> wrote:
> Here are my 2cents for debugging your problem.
>
> Off the top of my head,  do you have any lights? Is the unit size your
> model wasconstructed in  adequate for your near far clipping on your camera?

Hello.

Ah, definitely no lights. I'm not sure about the near and far
clipping, I'll have to
do some resizing to check.

cheers
a1

-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems?  Stop!  Download the new AJAX search engine that makes
searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid3432&bid#0486&dat1642
Permalink | Reply | 3 comments |

Gmane