Another idea is you can get one of the inputs to your node, cast that op
to your custom op's class, then access data directly from it
Not sure it will work well in your case of an executable note, but we
had one node which loaded a file from disc, then downstream there was
several nodes which used data from this loader node, like so:
MyLoaderNode* loader = dynamic_cast<MyLoaderNode*>(input(1));
loader->initialise_cache();
On 18/03/15 00:06, Nils Plath wrote:
Hello nuke-dev,
This questions is addressed to developers using C++ and Nuke NDK.
**Context:** Assume a custom Op which implements the interfaces of
`DD::Image::NoIop` and
`DD::Image::Executable`. The node iterates of a range of frames extracting
information at
each frame, which is stored in a custom data structure. An custom knob, which
is a member
variable of the above Op (but invisible in the UI), handles the loading and
saving
(serialization) of the data structure.
Now I want to exchange that data structure between Ops.
So far I have come up with the following ideas:
1. Expression linking
Knobs can share information (matrices, etc.) using expression linking.
Can this be used to for custom data as well?
2. Serialization to image data
The custom data would be serialized and written into a (new) channel. A
node further down the processing tree could grab that and de-serialize
again. Of course, the channel must not be altered between serialization
and de-serialization or else ... this is a hack, I know, but, hey, any
port
in a storm!
3. GeoOp + renderer
In cases where the custom data is purely point-based (which,
unfortunately,
it isn't in my case), I could turn the above node into a 3D node and
pass
point data to other 3D nodes. At some point a render node would be
required
to come back to 2D.
I am going into the correct direction with this? If not, what is a sensible
approach to make this data structure available to other nodes, which rely on the
information contained in it?
This question can also be found here:
http://stackoverflow.com/q/29100348/1141118
Sincerely,
Nils
--
ben dickson
2D TD | [email protected]
rising sun pictures | www.rsp.com.au
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