Hi Christian,
You are probably coming up against the problem of the
osgProducer::Viewer using camera manipulators to set the view matrix
on each frame, this overwrites the Producer setting.
One thing you could try is to use
osgProducer::Viewer::setViewByMatrix(..); and pass in a Matrix set up
as look at.
If you are new to the OSG and just starting out, then I'd recommend
using the osgViewer library found in the 1.9.x and SVN versions of the
OSG. Integration with core OSG is much cleaner in osgViewer than it
is with osgProducer.
Robert.
On 6/1/07, [EMAIL PROTECTED]
<[EMAIL PROTECTED]> wrote:
Hello,
I have a question about how to set the position of a camera. I do it the
following way:
Producer::CameraConfig* createCameraConfig(void)
{
// create a new render surface
Producer::RenderSurface *rsWindow = new Producer::RenderSurface;
// set the number of screens
rsWindow->setScreenNum(0);
// set the window title bar caption
rsWindow->setWindowName("CameraTest");
// set the window client size
rsWindow->setWindowRectangle(0,0, 1024, 768);
// create a new camera
Producer::Camera *camera = new Producer::Camera;
// set the render surface of the camera to the window that was just
created
camera->setRenderSurface(rsWindow);
// set the size of the camera viewport to the same size as the window
camera->setProjectionRectangle(0,0,1024,768;
// set the camera position
camera->setViewByLookat(Producer::Vec3(0.0f,0.0f,-6.0f),
Producer::Vec3(0.0f,0.0f,0.0f),
Producer::Vec3(0.0f,1.0f,0.0f));
// create a new camera configuration container
Producer::CameraConfig *cfg = new Producer::CameraConfig;
// add the camera that was just created to the configuration
cfg->addCamera("Camera One",camera1);
return(cfg);
}
void createView()
{
// Create View with ProducerCamera Config
m_viewer = new osgProducer::Viewer(createCameraConfig());
// Create Scene root
m_viewerRoot= new osg::Group();
m_viewerRoot->setName("Root");
// Sett default Settings
m_viewer->setUpViewer(osgProducer::Viewer::STANDARD_SETTINGS);
/* Test to check position set up on View
m_viewer->setViewByLookat(Producer::Vec3(0.0f, 0.0f,-10.0f),
Producer::Vec3(0.0f, 0.0f, 0.0f),
Producer::Vec3(0.0f, 1.0f, 0.0f));
*/
m_viewer->setSceneData(m_viewerRoot.get());
m_viewer->realize();
}
I can set the position with setViewByLookat() to whatever I want, but nothing
changes to the initial camera position. It is always the default position or
something unspecific. Because Producer::Camera is an external component which
is used by the osgProducerViewer i tried to set the position directly on the
viewer by: setViewByLookat()
But this has no effect too. If i call later in the code const double* pos =
m_viewer->getPosition(); i got always some position values i've never set ...
Is there a way to predefine the Producer::Camera or Viewer Position?
Thanks for any help.
Best regards
Christian
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