Hello Enrico,
Enrico Borrione wrote:
> Hi openSG users,
> i am working on a client server application. One of the features
> that I am trying to implement, relies on the mouse interaction with the
> server side scene. I thought about introducing a "virtual" 3d mouse hovering
> in front of the user, piloted in the client side.
>
> Since in previous projects I used often the opensg picking example I thought
> about using the same principle on the viewport belonging to the
> MultiDisplayWindow I am using:
>
> osg::CameraPtr camera = m_pClientRenderModule->getMainCamera ();
> osg::Line line;
> camera->calcViewRay (line, posX, posY,
> *m_pClientRenderModule->getMainViewPort().getCPtr());
>
> osg::Pnt3f point;
> m_pCursorPlane.intersect (line, point);
>
> setCursorPosition (point);
>
> to check the intersection I simply intersect the unprojected line with a
> plane normal to the At-From vector.
>
> The code is working, except from some weird coordinates problems. I thought
> that the cursor would have behaved like a normal mouse pointer, with
> coordinates ranging from 0,0 (upper left pixel) to winWidth, winHeight.
> Instead, no matter what size I give to the MultiDisplayWindow, I can't get
> the "mouse coordinates" match the window dimensions (usually the 0,0 point
> in in the mid of the server window).
>
> Any hints on what I am doing wrong?
hm, the line you get from calcViewRay is in world coordinates and I
assume the same is true for the intersection point. It seems you now
want to map that point back from world coordinates to window coords, but
that should just give you the posX, posY you started with?
Sorry, I'm afraid I don't really understand how your mapping between
window coords and the 3d world coords works.
Or are you saying that posX, posY already do not have values between 0
and winWidth/Height ?
regards,
Carsten
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