Web3D 2012: Call for Participation

*** CALL FOR PARTICIPATION --- Web3D 2012 ***

Web3D Conference 2012
17th International Conference on 3D Web Technology
Sponsored by ACM SIGGRAPH and in cooperation with Eurographics Association

August 4 - 5, 2012
L.A. Convention Center, Los Angeles, CA, USA
 http://www.web3d2012.org/
 Mail: web3d2012@...

Registration:
 http://www.web3d2012.org/registration.html

Confirmed Invited Speakers:
 - Markus Gross    (ETH Zurich & Disney Research Zurich, Switzerland)
 - David J. Kasik  (Boing, USA)
 http://www.web3d2012.org/invitedSpeakers.html

Program:
 The program and the list of accepted papers and posters can be found on
 http://www.web3d2012.org/program.html

Web3D:
------
The 17th ACM International Web3D Conference will address a wide range of research topics related to
Web-based 3D Graphics. These topics include: representation and modeling methods, content analysis,
rendering, distributed virtual environments, large-scale databases, Web-wide human-computer
interaction, as well as innovative tools and applications.
On the one hand, authoring and delivering educational contents is one of the main interests of this edition

Re: FBO render to depth image (OpenSG 2.0)

Hi Carsten,

thanks a lot, I have it working now.
Actually, read back has been the problem.
In "OSGRenderBuffer.cpp", it uses "pImg->getPixelFormat()" as the format,
(which should be GL_DEPTH_COMPONENT for the depth buffer)

"
void RenderBuffer::processPreDeactivate (DrawEnv *pEnv, UInt32 index)
{
    if(_sfReadBack.getValue() == true)
    {
        Image *pImg = this->getImage();

        if(pImg == NULL)
            return;

        if(pImg->getData() == NULL)
        {
            SINFO << "TextureBuffer::render: (Re)Allocating image "
                  << "for read-back."
                  << endLog;

            pImg->set(pImg->getPixelFormat(),
                      pImg->getWidth      (),
                      pImg->getHeight     (),
                      pImg->getDepth      (),
                      pImg->getMipMapCount(),
                      pImg->getFrameCount (),
                      pImg->getFrameDelay (),

Re: FBO render to depth image (OpenSG 2.0)

	Hello Christoph,

On 07/03/2012 04:00 AM, "Christoph Fünfzig" wrote:
> thanks a lot, I have it working now.
> Actually, read back has been the problem.
> In "OSGRenderBuffer.cpp", it uses "pImg->getPixelFormat()" as the format,
> (which should be GL_DEPTH_COMPONENT for the depth buffer)
[SNIP]
> Can you please consider adding a format GL_DEPTH_COMPONENT to "OSGImage.cpp" ?
> "OSGImage.cpp", line 110:
>       { GL_DEPTH_COMPONENT,             1 },
> With this addition, it works with RenderBuffer and TextureBuffer as well.

I think the attached patch should do it.

Gerrit: could you eyeball it, I'll probably forever be confused by 
OpenGL's format, internal format and data type specifications for 
textures/buffers ;)

	Cheers,
		Carsten

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Re: FBO render to depth image (OpenSG 2.0)

Hi Carsten,

I incorporated the patch!
For me it works like a charm ..

Thanks,
Christoph

On 04.07.2012 01:20, Carsten Neumann wrote:
>    Hello Christoph,
>
> On 07/03/2012 04:00 AM, "Christoph Fünfzig" wrote:
>> thanks a lot, I have it working now.
>> Actually, read back has been the problem.
>> In "OSGRenderBuffer.cpp", it uses "pImg->getPixelFormat()" as the format,
>> (which should be GL_DEPTH_COMPONENT for the depth buffer)
> [SNIP]
>> Can you please consider adding a format GL_DEPTH_COMPONENT to "OSGImage.cpp" ?
>> "OSGImage.cpp", line 110:
>>       { GL_DEPTH_COMPONENT,             1 },
>> With this addition, it works with RenderBuffer and TextureBuffer as well.
>
> I think the attached patch should do it.
>
> Gerrit: could you eyeball it, I'll probably forever be confused by OpenGL's format, internal format and
data type specifications for textures/buffers ;)
>
>     Cheers,
>         Carsten 

Re: OpenSG 2.0 & Shadows

Hello Carsten,

it actually did. I have now solved the issue.

Thanks,
Keyan

On 28 Jun 2012, at 17:48, Carsten Neumann wrote:

> 	Hello Keyan,
> 
> On 06/27/2012 04:27 PM, Keyan wrote:
>> this issue is now really getting a pain …
>> 
>> I need shadows, which are calculated independent of the camera's position to the center of origin.
Setting and fixing some boxes, which lead to a poor shadow calculation, as suggested, is not an option.
>> 
>> My current idea is the keep the OpenSG-navigator fixed, and to implement my own camera, that translates
my scene back to the center of origin, so that everything is within the shadow-calculation area.
>> 
>> The problem that I now have is the following: how can I do what in gl is know as glLoadIdentity(). For some
reason, I just can't figure out how to set the navigator such that geFrom results in 0, 0, 0, getAt results in
0, 1,0 and up results in 0,0,1. Using the setFrom/setAt/setUp lead to somewhat unexpected results. So i
would like to "reset" the scene graph at the very first node, to then apply my own transformations, from a
well defined initial state.
> 
> hmm, I'm not sure I'm following: Navigators are usually set up to 
> manipulate the camera beacon. If you don't want that you can either have 
> it modify a different transform or assign a different beacon node to 
> your camera (or have no beacon node at all).

CMake Mac OS X Compile OpenSG 2.0

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Re: CMake Mac OS X Compile OpenSG 2.0

	Hello Victor,

On 07/11/2012 09:18 AM, Victor Haefner wrote:
> I tried to compile OpenSG 2.0 on Mac OS X 10.7.4 with macports boost
> at 99% I get the error:
> Compiling Filesystem version 3 with BOOST_FILESYSTEM_VERSION defined != 3

hmm, which file is it compiling? Oh never mind, most likely it's 
Source/Contrib/BackgroundLoader/testBackgroundLoader.cpp, I see that it 
starts with #define BOOST_FILESYSTEM_VERSION 2, which won't work for 
boost versions where filesystem v2 was removed (so boost 1.48.0 and 
newer, I think).

A quick workaround would be to disable libOSGContribBackgroundLoader, 
simply add

RETURN()

at the top of 
Source/Contrib/BackgroundLoader/CMakeLists.Lib.OSGContribBackgroundLoader.txt

The full fix is of course to make that test work with boost filesystem 
v3 and remove the define, I'll see what I can do.

> cmake first says:
> Boost version: 1.50.0
> Found the following Boost libraries:
>     filesystem
>     system
>
> but further down it says:
> Could NOT find Boost

that may be a bogus message although it is a bit odd.

> I tried to use -DBOOST_ROOT=/opt/local/ but this didn't help cmake to
> find boost

Did you remove your CMakeCache.txt in the build dir? IIRC the cmake 
module to locate boost does not detect changes to BOOST_ROOT after it 
already found an installation.

	Cheers,
		Carsten

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Re: CMake Mac OS X Compile OpenSG 2.0

On 07/11/2012 12:58 PM, Carsten Neumann wrote:
> The full fix is of course to make that test work with boost filesystem
> v3 and remove the define, I'll see what I can do.

I've committed a fix that should make the test work with boost 
filesystem v2 and v3.
Can you update and try again please?

	Cheers,
		Carsten

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OSG2 debug output in navigator

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Re: OSG2 debug output in navigator

Hi,

On Thu, 2012-07-12 at 10:30 +0200, Volker Settgast wrote:
> Hi,
> 
>  
> 
> in system/window/utilities/OSGNavigator.cpp, line 701 there is an fprintf. I
> think somebody forgot to remove it .

ok, I'll remove it, 

thanks
  gerrit

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