RE: [osg-users] sharing GL-contexts and textures, continued ...

Elk, M.G. (Michel) van Tue, 19 Sep 2006 08:07:55 -0700

Hi Don, thank you for your solution.

I have re-written your config into code, I create one cameraconfig and add two camera's with

rendersurfaces to it. Then I create one viewer, using the cameraconfig.

Here's the code:

Producer::CameraConfig *cfg = new Producer::CameraConfig;

Producer::Camera *camera1 = new Producer::Camera;
Producer::RenderSurface *rs1 = new Producer::RenderSurface;
rs1->setWindowRectangle(20,20,320,240);
rs1->setWindowName("Render Window 1");
camera1->setRenderSurface(rs1);
cfg->addCamera("Camera1",camera1);

Producer::Camera *camera2 = new Producer::Camera;
Producer::RenderSurface *rs2 = new Producer::RenderSurface;
rs2->setWindowRectangle(400,20,320,240);
rs2->setWindowName("Render Window 2");
camera2->setRenderSurface(rs2);
cfg->addCamera("Camera2",camera2);

osgProducer::Viewer viewer1(cfg);
viewer1.setUpViewer(osgProducer::Viewer::STANDARD_SETTINGS);
viewer1.realize();

I notice two things:

1) the performance drops dramatically, 20 FPS for 1 window, 1.50 FPS for 2 windows

2) both windows react to the same mouse/keyboard handler (only active on one window) which is

unwanted behaviour for me.

Is it correct to say that 2) cannot be solved since an eventhandler is part of a viewer and not

of a camera?

Thanks,

Michel

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Don Burns
Sent: maandag 18 september 2006 18:33
To: osg users
Subject: Re: [osg-users] sharing GL-contexts and textures, continued ...

Two ways to do this:

Cut and past the following into a file named 'twoWindows.cfg':

Camera "Camera 1"
{
    RenderSurface "RenderSurface 1"
    {
             Visual { SetSimple }
             Screen 0;
             WindowRect 10 10 620 480;
        InputRectangle -1.0 0.0 -1.0 1.0;
    }
    Lens {
                Frustum -0.55228475 0.55228475 -0.41421356 0.41421356 1 1000.0;
    }
        Offset {
                Shear 1.0 0.0;
        }
}

Camera "Camera 2"
{
    RenderSurface "RenderSurface 2"
    {
                Visual { SetSimple }
                Screen 0;
                WindowRect 650 10 620 480;
        InputRectangle 0.0 1.0 -1.0 1.0;
    }
    Lens {
                Frustum -0.55228475 0.55228475 -0.41421356 0.41421356 1 1000.0;
    }
        Offset {
                Shear -1.0 0.0;
        }
}

InputArea
{
        RenderSurface "RenderSurface 1";
        RenderSurface "RenderSurface 2";
}

Then run:

osgviewer -c twoWindows.cfg cow.osg

2) Create the config file programatically and pass the Producer::CameraConfig to osgProducer::Viewer's constructor.

-don

On 9/18/06, Elk, M.G. (Michel) van <[EMAIL PROTECTED]> wrote:

During the discussion on sharing resources between viewers,

Don Burns wrote:

The use of two viewers (I assume you mean two osgProducer::Viewers), is expected to work as you have experienced. However, applications should use only one viewer with a configuration for multiple windows.

My question: How can I create multiple windows using one osgProducer::Viewer?

Anyone?

Thanks & regards,

Michel

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RE: [osg-users] sharing GL-contexts and textures, continued ...

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