Hi Carsten,
As you already know I'm working on an OpenSG based animation framework,
and so far every tested part seems to work.
Now I'm trying to implement some methods in order to save (load) the
whole animation to (from) an OSB file, and the basic idea is to store
the control points list inside an Attachment (hosted by the field
container whose fields are to be interpolated).
I thus created a new FieldContainer (using the fcdEdit.exe tool) which
is derived from 'Attachment' and has among its fields a
MFFieldContainerPtr: such field is used to store the control points,
each one in form of FieldContainerPtr.
To save to/load from an OSB file, the idea is to create a new object
that inherits SceneFileHandler and overrides its read()/write()'
methods. Such new object's behavior would be the following:
- write() method:
Before saving the scene to a file, the control point lists
are attached to the proper field containers. Then the file
is written via the
'SceneFileHandler::the().write(rootNode, fileName)' method.
- read() method:
In order to import a scene from an OSB file, the
'SceneFileHandler::the().read(fileName)' method is used at
first to populate the graph, then the idea is to perform a
'traverse()' operation to find out which field container
has an attached control point list. If an attached control
point list is found, it is then passed to the
AnimationController object (together with the corresponding
field container).
Another possible approach could be modifying the SceneFileHandler's
write() and read() methods to add such functionality directly to OpenSG.
Now I have a couple of questions for you:
1 - What do you think of such ideas ?
2 - Could they be improved in any way ?
3 - How challenging do you think it would be to
integrate my animation framework into OpenSG ?
Many thanks in advanvce!
Cheers,
Carlo
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