Mixing 2D and 3D

[Chien Yang]

Hi August,

       We did talk through some use cases such as PIP and rear view 
mirror. You can do simultaneous viewing from different points of view 
into a single 3D scene via the use of SubScenes. The key point, as you 
have clearly stated, is the need to clone the scene graph nodes per 
SubScene.

- Chien

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.
>