err... two identical groups of nodes**
On 7/25/2013 11:04 AM, Joseph Andresen wrote:
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.
