Hello Jan,
Jan wrote:
> Hi all,
>
> I have a question about the conversion of object coordinates to viewport
> coordinates in opensg.
>
> In my application, I have a 3D pointer object (a cone), which I want to
> use for a picking routine. To know the position of this object in
> worldspace, I'm doing this :
>
> DynamicVolume vol;
> m_pointerNode->getWorldVolume(vol);
> osg::Pnt3f center;
> vol.getCenter(center);
>
> Now I want to construct a viewray from the X and Y position of the
> pointer (with the simplescene manager's calcViewRay() method) to do some
> picking. Is there a method to convert the x and y coordinates of the of
> the center position to the x and y coordinates needed for the
> calcViewRay method?
there is Camera::getWorldToScreen(Matrixr &result,
const Viewport &port) which should give you the matrix
for that transformation.
Hope it helps,
Carsten
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