I am trying to acheive an effect whereby some geometry in a scene is
rendered after and in front of everything else.
What I want to be able to do is show an osgManipulator::Dragger node
attached to an object in a scene, but show it infront of everything, I guess
a bit like a HUD, but where only the Dragger is rendered on the HUD.
For anyone that has used Maya, the effect I want is similar to the
translation/rotation/scaling manipulators, i.e. where they can be used and
seen regardless of what objects that would normally be obscuring them.
What's the best way to implement that?
The most obvious way seemed to me to create a HUD style postrender camera to
render the manipulator on top of the normally rendered scene. But I'm not
100% sure how to get it to only render the manipulator in the scene. Do I
need to use nodemasks, or do I need to move the manipulator into an empty
HUD scene along with its local to world transform?
Neither method seemed very elegant to me, so just wondering if anyone's got
a better idea.
Chris D.
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