Hi Carlos,
You code will only work when running the viewer in SingleThreaded.
Please use a camera final/post draw callback for your glReadPixel
calls, as suggested.
Robert.
On Fri, Jun 27, 2008 at 7:06 PM, Carlos Sanches <[EMAIL PROTECTED]> wrote:
> My code :
>
> osg::Image *Ximage;
>
>
>
> osg::Camera* cam = new osg::Camera;
>
> cam->setProjectionMatrixAsPerspective(20,1,20,1000000);
> cam->setViewport(0,0,640,180);
> cam->setClearColor(osg::Vec4(0.7,0.7,1,1));
>
> osgViewer::Viewer viewer;
> viewer.setSceneData( root );
> viewer.setCameraManipulator(new
> osgGA::TrackballManipulator);
> // viewer.setCamera(cam);
> viewer.addEventHandler( new
> myKeyboardEventHandler );
> viewer.realize();
>
>
>
> while( !viewer.done() )
> {
>
>
>
> cam->setViewMatrixAsLookAt(
> osg::Vec3(posx,posy,posz),
>
> osg::Vec3(tposx,tposy,tposz),
> osg::Vec3(0,0,1) );
>
>
>
>
> Ximage->readPixels(100,100,640,480, GL_RGBA, GL_UNSIGNED_BYTE);
> osgDB::writeImageFile(*Ximage,"teste.bmp");
> viewer.frame();
>
> }
>
>
> The image teste.bmp is black . I m trying the example osgScreenCapture but
> some errors is appearing .
>
>
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>
>
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