[osg-users] Camera resize vs setViewport

[Ravi Mathur]

Hi all,

In osg::Camera, there exist two resize functions: Camera::resize(width, height) and Camera::setViewport(x, y, width, height). I'm confused conceptually as to when to use which one. Some examples use resize (osgdistortion), whereas others use setViewport (osghud).

Looking at the Camera.cpp code, it looks like resize() calls setViewport(), but why does it not then accept x/y position arguments? For example, I have a CompositeViewer with multiple Views. Each View has a master & slave (HUD) camera, which are set up in a grid format on the GraphicsContext. I initialize each master/slave combo using setViewport() but I can't use Camera::resize() since I can't pass it the x/y coordinates.

What am I missing here? When is it appropriate to call Camera::resize() instead of Camera::setViewport()?

Thanks,
Ravi

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