Mixing 2D and 3D

Chien Yang chien.yang at oracle.com
Fri Jul 26 10:53:12 PDT 2013

Yes, that is still the approach. The challenge isn't just strictly on 
rendering. Let's take picking a "shared" node as an example. Imagine 
this node is in a scenegraph viewed by more than 1 camera. The question 
is where do we hang the set picked information. There is some level of 
"cloning" needed within JavaFX if we want to free application developer 
from doing it.

- Chien

On 7/25/2013 7:31 PM, Richard Bair wrote:
> I thought the approach was not to have multiple parents, but to render into an image.
> On Jul 25, 2013, at 5:26 PM, Chien Yang<chien.yang at oracle.com>  wrote:
>> We don't support sharable Node. Some one will have to do the cloning of the scenegraph, either the application or JavaFX. Now I may have opened a can of worms. ;-)
>> - Chien
>> On 7/25/2013 5:20 PM, Richard Bair wrote:
>>> Having to clone the nodes hardly seems like simultaneous viewing from different points of view?
>>> On Jul 25, 2013, at 5:17 PM, Chien Yang<chien.yang at oracle.com>  wrote:
>>>> 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.

More information about the openjfx-dev mailing list