Oh and for reference (forgot to add)
the method to update the camera is as follows
/////////////////////////////
void CCameraView::UpdateCameraMatrices(osg::Camera * camera)
{
// Set the projection matrix on the camera
if (this->m_bIsOrthogonal)
{
camera->setProjectionMatrixAsOrtho(-m_fOrthoZoom, m_fOrthoZoom,
-m_fOrthoZoom, m_fOrthoZoom, m_fNearClip, m_fFarClip);
}
else
{
camera->setProjectionMatrixAsPerspective(m_fFieldOfView, m_fAspect,
m_fNearClip, m_fFarClip);
}
// Set the view matrix on the camera
camera->setViewMatrixAsLookAt(GetCameraPosition(), GetCameraTarget(),
GetUpVector());
}
/////////////////////////////
On Fri, Aug 7, 2009 at 11:49 AM, Andrew Burnett-Thompson <
[email protected]> wrote:
> Hi Robert,
>
> Thanks for your helpful reply. I've sorted this problem by taking the
> following steps
>
> 1. Removal of camera manipulators from the scene (I had a custom
> manipulator that allowed you to set target/position, but event handling was
> done elsewhere in my external application)
>
> 2. Creation of a class CCameraView which does little more than hold
> variables to setup the camera, such as position, target, field of view,
> near/far, isOrthogonal, orthogonal zoom factor etc....
>
> 3. Multiple instances of my CCameraView class are held by the application,
> one for the perspective freelook view, one for a plan view, plus others for
> various views around the scene that I need. These are updated appropriately
> by my applications event processing code.
>
> 4. Setting of the current active CCameraView on the scene as appropriate
> (depending on what mode the app is in)
>
> 5. Within the render loop, immediately prior to Viewer->Frame, call
> Viewer->getCamera() to get the main camera, and pass it to the current
> CameraView instance (a method called UpdateCameraMatrices). This then
> applies the desired view/projection matrix
>
> 6. Render the scene
>
> Simple really when you know how. I realise the above is not an OSG problem,
> more a "How to use OSG in my system in such a way" problem, but I am posting
> as others may find the solution useful.
>
> Thank you,
> Andrew
>
>
> On Wed, Aug 5, 2009 at 10:00 AM, Robert Osfield
> <[email protected]>wrote:
>
>> Hi Andrew,
>>
>> On Wed, Aug 5, 2009 at 9:35 AM, Andrew
>> Burnett-Thompson<[email protected]> wrote:
>> > I noticed osg::Camera offers more direct access to the view/projection
>> than
>> > the camera manipulator (which only affects the View), so I've dumped
>> camera
>> > manipulator and created two cameras - perspective / plan.
>>
>> Yes this would be doable, although having two separate views in
>> CompositeViewer might be more logical an easier to manage.
>>
>> > Then I am directly updating the camera in the perspective/plan mode from
>> my
>> > own event handling code. (In addition I need multiple other cameras that
>> I
>> > can position around the scene in perspective mode and switch to on
>> various
>> > key presses).
>> >
>> > One problem - I am trying to swap the cameras in/out of the osg::Viewer
>> so I
>> > was using osg::Viewer::setCamera and getCamera to get/set the default
>> > camera, however it is not behaving as expected.
>>
>> What problem are you seeing? Using the
>> viewer.getCamera()->set..MatrixAs..(..) methods work fine, but if you
>> need to make sure that you aren't also attaching a CameraManipulator
>> as this will overwrite your values on each frame.
>>
>> > Is this the right way to set the default camera?
>>
>> Just use the Camera that is already assigned to the Viewer.
>>
>> Robert.
>> _______________________________________________
>> osg-users mailing list
>> [email protected]
>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>>
>
>
_______________________________________________
osg-users mailing list
[email protected]
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
