It's a never-ending story...
InExcludeList does not seem to be the answer.
I have changed my Observable code to use an InExcludeList in the description of the Observable (the BaseObject that is to be observed). When that object is linked in the Observer (the BaseShader that links to the BaseObject via a LINK description element), I catch SetDParameter(), remove the Shader from the previously linked Observable's InExcludeList, and add it to the newly linked Observable's InExcludeList.
So far, that works just fine.
However, when nesting the BaseShader in another shader, e.g. a Colorizer, the shader's CopyTo() is called. Here, I am trying to add the destination shader to the Observable's InExcludeList. It does not work.
Bool MyShaderData::CopyTo(NodeData *dest, GeListNode *snode, GeListNode *dnode, COPYFLAGS flags, AliasTrans *trn)
{
iferr_scope_handler
{
GePrint(err.GetMessage());
return false;
};
// Get everything we need
BaseDocument *sourceDoc = snode->GetDocument();
BaseDocument *destDoc = dnode->GetDocument(); // This is always NULL!
BaseShader *sourceShader = static_cast<BaseShader*>(snode);
BaseShader *destShader = static_cast<BaseShader*>(dnode);
// Get linked object from the shader's LINK
const BaseContainer &dataRef = sourceShader->GetDataInstanceRef();
BaseObject *linkedObject = dataRef.GetObjectLink(MYSHADER_OPERATORLINK, snode->GetDocument());
if (linkedObject && sourceDoc/*destDoc*/) // Can't check destDoc, as it's always NULL
{
// Get linked object's Observable instance
MyObjectData *linkedObjectData = linkedObject->GetNodeData<MyObjectData>();
if (!linkedObjectData)
return false;
MyObservable &observable = linkedObjectData->GetObservableRef();
// Add destShader as new observer to the linked object's Observable
observable.Subscribe(destShader, linkedObject, MYOBJECT_OBSERVERLIST, sourceDoc) iferr_return;
}
// Translate (doesn't seem to make a difference)
if (trn)
trn->Translate(true);
return SUPER::CopyTo(dest, snode, dnode, flags, trn);
}
I am looking at the InExcludeList in the linked object. After MyShader::CopyTo()was called, the list always appears empty. observable.Subscribe() is called, but the new copy of the shader does not show up in it.
So, my question remains:
How can I maintain a BaseLink to my shader in an object, after the shader has been copied?
Cheers,
Frank
ADDITION:
Interesting. If I add an InExcludeList to any object, just for a test, and not actually handle it anywhere in my code, it also looses the link to any BaseShader I add to the list, when that BaseShader is then nested in another shader. I just added a useless InExcludeList to some object, linked a Noise shader in it, and then nested the Noise Shader in a Colorizer. Whoops, the InEcludeList is empty
So, it seems, the reason for this not working isn't even in my code. Is this a bug in Cinema, or a general problem, or does the object that holds the InExcludeList have to do something in order to make it work? Catch some message, or something like that?
