Adding object to In/Exclusion List

[Helper]

On 05/10/2017 at 11:58, xxxxxxxx wrote:

I'm trying to create a null and add it to an in/exclusion list. The list is in the user data of an xpresso tag. This will be run off of a script. I have this code so far:

import c4d
from c4d import gui, utils

def main() :
    document = doc
    tagowner = doc.SearchObject('StageLightMaster')
    xtag = tagowner.GetFirstTag()
    LinkList = xtag[c4d.ID_USERDATA,1]
    NullMaster = c4d.BaseObject(5140)
    document.InsertObject(NullMaster)
    LinkList.InsertObject(NullMaster,1)
    c4d.EventAdd()
if __name__=='__main__':
    main()

I can run a count before and after the object is added and it seems to be running properly, but when I go to the list in the tag it is not updated to include the null. I read somewhere that I need to update the gui object for the changes to take place, but I'm not sure how to call it. Any help is greatly appreciated! Thanks!

[Helper]

On 06/10/2017 at 02:05, xxxxxxxx wrote:

Add

xtag[c4d.ID_USERDATA,1] = LinkList

Before your EventaAdd().

If we go step by step in your program here is what happend.

mport c4d
from c4d import gui, utils
  
def main() :
    #Get the obj
    document = doc
    tagowner = doc.SearchObject('StageLightMaster')
    
    #Get the tag
    xtag = tagowner.GetFirstTag()
    
    #Get a copy in memory of xtag[c4d.ID_USERDATA,1]
    LinkList = xtag[c4d.ID_USERDATA,1]
    
    #Create in memory a new object an copy it to NullMaster
    NullMaster = c4d.BaseObject(5140)
    
    #Insert The the object into the document
    document.InsertObject(NullMaster)
    
    #Insert the object into your linklist variable which is a copy in memory of the userdata
    LinkList.InsertObject(NullMaster,1)
    
    #Trigger an event
    c4d.EventAdd()
if __name__=='__main__':
    main()

So as you see you only change value on memory so you need to push back into the object ;)

[Helper]

On 06/10/2017 at 02:05, xxxxxxxx wrote:

Hi and Welcome to the Plugin Cafe forums!

LinkList in your script (retrieved with xtag[c4d.ID_USERDATA,1]) is a copy of the actual in/exclusion user data.
So it has to be assigned to xtag[c4d.ID_USERDATA,1], after inserting the null object, for the in/exclusion user data to be updated in the GUI.

[Helper]

On 06/10/2017 at 05:40, xxxxxxxx wrote:

Well you guys are just awesome! Thanks for explaining the logic behind the solution this helps me out tremendously.