On 7/25/2013 10:37 AM, Richard Bair wrote:
Hi August,
"I think we already do multiple active cameras?"
More precisely: simultaneous viewing from different points of view into a
single 3D scene graph was meant, i.e. several cameras are attached to one scene
graph.
A SubScene has exactly one camera attached which renders the associated scene
graph into the corresponding SubScene's rectangle. Implementing simultaneous
viewing requires a cloned 3D scene graph for the second, third, and so on
SubScene/Camera. Material, Mesh, and Image objects can be re-used because they
are shareable. Animations of Nodes' Transforms seem to be shareable as well.
But Transitions (Rotate, Scale, Translate) have to be cloned because they
operate on a Node's methods directly. So, simultaneous viewing seems
practicable.
Jasper or Kevin will have to comment, but I know this scenario was talked about
extensively in the design for the renderToImage and cameras, and I thought this
was possible today.
I know that one way to do this is by rendering the same group of nodes
twice, using two different cameras each time, and using render to image
or whatever to get your "RTT". I haven't tried it but i suspect it goes
something like calling render to image on a group with one camera and
then render to image on the same group with a different camera.
