Mixing 2D and 3D

[Joseph Andresen]

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.
>