Posts made by esan

@m_magalhaes This is fantastic, it works and gives me a lot to dissect. I'll be further expanding on it to include Instance objects and cloners [have already had that working as theyre a simple "make editable"]. In my day to day i have to often share assets via FBX, and if my assets are built with instances/clonser/MoText [<-particularly messy], FBXs auto conversion of those assets create quite a messy hierarchy, roots on roots for days lol. This will help clean things up. Thanks!

I think one issue i need to solve with this method is reapplying/maintaining the original objects applied Material.

C4D R20

I started the "SendModelCommand" path but trying to just get this stood up quickly with CallCommands first. The issue im having is obviously Connect + Delete happens on "All" selected objects, collapsing into one, when I want each to collapse into their own respective objects . My thoughts are to find all "MoText" under op root, store in an array and run the[ select > make editable >] select children of new hierarchy > connect+delete (deselect all?) stepping through the whole sequence per item. before moving onto the next item since connect+delete doesn't care about hierarchy, at least in CallCommand form anyway.

I've made a couple of attempts at executing that logic, but am fairly new to writing python for C4D so haven't had success yet. Hoping i can be shown how to achieve my logic or be told/shown there's a much better way to go about it altogether.

Thanks in advance!

import c4d
from c4d import gui
from c4d import utils

def selchildren(obj,next): # Scan obj hierarchy and select children

    while obj and obj != next:

        doc.AddUndo(c4d.UNDOTYPE_CHANGE_SMALL,obj)

        if obj.CheckType(1019268): #find MoText
            obj.SetBit(c4d.BIT_ACTIVE)

        selchildren(obj.GetDown(),next)

        obj = obj.GetNext()

    c4d.EventAdd()

    return True



def main():


    for obj in doc.GetActiveObjects(c4d.GETACTIVEOBJECTFLAGS_CHILDREN):
        if selchildren(obj, obj.GetNext()):
            obj.DelBit(c4d.BIT_ACTIVE)
            c4d.CallCommand(12236) # Make Editable
            c4d.CallCommand(16768, 16768) # Connect + Delte
            

# Execute main()
if __name__=='__main__':
    main()

@Cairyn

Ah youre right, the Return was the cause of the errors, not the triple quotes. Got it all working now! (after taking a few tries to get the "indents" with the strings right)

Thanks a ton!

@m_adam

So final question. When i execute node[2][c4d.GV_PYTHON_CODE] = 'test string', all is well. When i try to exectute this as a function, i get errors. This setup gives me error " setitem expected str, not None"

i wanted to do a multi-line string incapsulation but the triple quotes seem to be reserved for title/headers in this environment. How would i go about conveying that this function is a Str if making it a bucket of strings doesnt do it?

def pythonNodeCode():

    'import c4d'
    
    'def main():'

    '    global Output2'
    '    global Input3'
 
    '    Output2 = c4d.BaseList2D.GetName(Input3)'

def main():

    #skip a lot of other code

    node[2][c4d.GV_PYTHON_CODE] = pythonNodeCode()

(i tried node[2][c4d.GV_PYTHON_CODE] = str(pythonNodeCode()) too just to make sure the obvious wasnt sitting in my face)

edit: I achieved the intent with this, but still interested in the non-atrocious way to write it lol

 node[2][c4d.GV_PYTHON_CODE] = 'import c4d \n\ndef main():\n\n    global Output2\n    global Input3\n\n    Output2 = c4d.BaseList2D.GetName(Input3)'

@m_adam

ahh, palm securely in face. Ya I had the GV_PYTHON_CODE but since I had spent so much time wrapping my head around this OperatorSetData in the node world prior I overcomplicated it from the start. Hadnt come across that console manual either, thanks a lot!

@Cairyn

Sorry, i have a lot of permutations of this and the code snippet isn't from that exact node pictured, just grabbed examples at random since the point of the question was asking how to populate the Python Node Code field with my Python Script. Once that works then yes ill make all the proper ports/names to accommodate, that part i have figured out and got working, just inserting code into the field is what im missing. Thanks

R20

I need to add an "Object" port to an object node, but I guess since I have R20 with that particular python bug preventing it, I need to find a workaround. All I need to do is get the currently instanced objects name, fed back into the display name (and appending with another string in here). Ive seen that "UserData" workaround to get a makeshift Object port but that feels heavy handed for my case. Thought a python node with simple script can replace my Object node and Name port like so

And this works, but cant seem to figure out how to "set" this Python Code in this Node via my Python Script. Have made this snippet of code a function and was trying everything from OperatorSetData, and even the InsertObjects through In/Exclude method I was just shown for my Link List question. But nothing ive done yet seems to populate the field. Final Stretch! Thanks for all the help thus far, this script has already been an amazing learning experience.

def main():

    global Output2
    global Input3

    Output2 = c4d.BaseList2D.GetName(Input3)

@r_gigante Another quick question. is there still a bug on c4d.GV_OBJECT_OPERATOR_OBJECT_OUT? I dont get object ports on my nodes when trying to add this and I saw it was a long standing bug.

...just saw notes that the bug was fixed in R21. But I (and the people ill be distributing this script to) are all on R20, is there any patch or easy workaround to getting Object ports showing up? This is the last step needed to finish my script!

thanks

@r_gigante said in OperatorSetData for "Lists"?:

inexdata.InsertObject(sphere, 1)

Thanks so much for your reply, I started getting way off track trying other methods lol! I got it working with:

inexdata = c4d.InExcludeData()
    
    for i, obj in enumerate(children):
        inexdata.InsertObject(children[i], 1)
        
    node[1][c4d.GV_LINK_LIST] = inexdata

Am i understanding this correctly? Im trying to populate an Xpresso Link List nodes (node[1])
"Link List" field with the children of Tiles. Just a partial snippet of code here, i dont get any errors, the objects just dont populate.
R20

Ive tried many permutations, tried GeListNode as type, tried enumerating children, putting that in a list()...im guessing my "Children" arent an actual "List" type, and im blindly dancing around the right answer, just cant quite get it? Do i need to first make these children a "list" (and how would i go about that?), or do i need to "insert" into document at any point? Based on the documentation it sounds like OperatorSetData should take care of the insertion. Or maybe im assuming incorrectly that "simulates user dragging onto the node" means it can simulate dragging into attribute manager of the node? Just learning Python for C4D so just trying to wrap my head around it all. Thanks!

Edit: Have given up on OperatorSetData and trying to follow some examples set by "Inserting" objects to IN/Exclude, though it has its own class to call on so working out those discrepancies, I tried a doc.InsertObject on a single child from the children list and console told me to "add them separately", so also trying to decipher that message since c4d.BaseObjects apparently don't like to be iterated, says console. Maybe a makeshift Python node acting as a Link List node is the way to go?

obj = doc.SearchObject("Tiles")
    children = obj.GetChildren()

node[1].OperatorSetData(c4d.GV_LINK_LIST, children ,c4d.GV_OP_DROP_IN_BODY)

@blastframe Ok was able to retrofit your version to get what I wanted, a bit of guesswork in here, but got the result im after lol

import c4d
from c4d import gui

def createInstance():
    obj = op.GetDown()
    inst = c4d.BaseObject(c4d.Oinstance) # created Instance with Base Object
    inst[c4d.INSTANCEOBJECT_LINK] = obj # set Instance's reference link
    # set the name using the object passed to the function
    inst[c4d.ID_BASELIST_NAME] = "%s Instance"%obj[c4d.ID_BASELIST_NAME]
    return inst # return the Instance instance

def AddLongDataType(obj): # create User Data Container named Picker
    if obj is None: return

    bc = c4d.GetCustomDataTypeDefault(c4d.DTYPE_LONG)
    bc[c4d.DESC_NAME] = "Picker"

    doc.AddUndo(c4d.UNDO_CHANGE, obj)
    obj.AddUserData(bc)

    c4d.EventAdd()

def setQuickTab(obj, inst, data): # change User Date container to type Cycle, populate with Children Names
    descid = data[0][0]
    bc = data[0][1]

    children = obj.GetChildren()

    # Build new cycle options container dynamically
    cycle = c4d.BaseContainer()

    for i,child in enumerate(children):
      cycle.SetData(i, child.GetName())

    bc[c4d.DESC_CYCLE] = cycle

    doc.AddUndo(c4d.UNDO_CHANGE, obj)
    # Set modified description data container
    inst.SetUserDataContainer(descid, bc)

def main(doc):
    obj = doc.GetActiveObject()
    if (obj == None):
        gui.MessageDialog("Please select the Root of the Assets you wish to Instance.")
        return

    doc.StartUndo()
    inst = createInstance()
    doc.InsertObject(inst)
    AddLongDataType(inst)
    data = inst.GetUserDataContainer()
    setQuickTab(obj, inst, data)
    
    doc.AddUndo(c4d.UNDO_NEW, inst)
    doc.EndUndo()
    c4d.EventAdd()

if __name__=='__main__':
    main(doc)

@blastframe Just tried to run the code and it seems the original issue is still present. User Data is being added to the Selected Root instead of the newly created instance. Also its now instancing the root, instead of first child. That part I can fix, and hopefully have enough here to figure out the rest to get my original intent!

@m_adam @blastframe

Man your replies are a treasure trove of valuable info for me lol. I’ve found it tough finding focused info on c4d/python methods and the documentation lacks some context that makes it tough for beginners to implement, let alone “best practices”.

Ya I had a version where I was handling all the “get active” stuff in “main” but tied myself in knots in other ways so reverted back to a safe place haha.

Yes children are what I want, the purpose of the script is as follows:

With my job I have to re-create a lot of Ui and their components in C4D. I built an xPresso rig onto an Instance object that dynamically sets reference object based on defined hierarchy [so I want all of the children in the root]. Then manually create the user data to reflect that hierarchy, setting the reference object. That’s all well and good, from that point I can dup my “icon” instance (that’s referencing all the objects in my “icon” root) and just pick which icon it is from the user data list. Makes it easy/fast and clean creating large scenes of Ui.

But who wants to manually populate, and have to manually keep up with the user data fields to make sure they reflect children in your desired root. Didn’t see a way to automate that in xPresso so figured would be the perfect python exercise for me.

Select root, run script. Script creates your instance and integer cycle user data populated with the child hierarchy...and also creates the xPresso with node network, but I suspect I may find keeping all that functionality (selecting ref object for given instance) in python will be easier than figured out how to create the xPresso node network in python.

Again, thanks for the help!

Have a function that creates a new instance of selected object (or, child of selected for now) - that works. Have functions that creates Cycle UserData on selected object, then populates with its children - that works. Next step I thought would be a breeze is creating the User Data "on" the newly created instance. Im pretty new to python so im sure theres a blatantly obvious way to do It I keep dancing around.

In my head, I think I want to pass the result of my createInstance function into my AddData function, but any means I try to do so gives me errors or no result. This version of my script is just from an arbitrary point so may be some other weirdness you could point out, just piecemealing at the moment.

C4D R20

import c4d
from c4d import gui



def createInstance(): # create Instance of Child of Selected Object
  if op is None:
      return
  obj = c4d.GeListNode.GetDown(op)
  inst = c4d.InstanceObject()
  inst.SetReferenceObject(obj)

  return obj

  c4d.EventAdd()


def AddLongDataType(obj): # create User Data Container named Picker
  if obj is None: return

  bc = c4d.GetCustomDataTypeDefault(c4d.DTYPE_LONG)
  bc[c4d.DESC_NAME] = "Picker"

  obj.AddUserData(bc)

  c4d.EventAdd()

def setQuickTab(obj, data): # change User Date container to type Cycle, populate with Children Names

  descid = data[0][0]
  bc = data[0][1]

  # Get the number of child objects
  parent = doc.GetActiveObject()
  count = len(parent.GetChildren())

  H = c4d.GeListNode.GetChildren(parent)

  # Build new cycle options container dynamically
  cycle = c4d.BaseContainer()

  for i in range (0,count):
      child = H[i]
      n = c4d.BaseList2D.GetName(H[i])
      cycle.SetData(i, n)


  bc[c4d.DESC_CYCLE] = cycle

  # Set modified description data container
  obj.SetUserDataContainer(descid, bc)

  # Notify Cinema 4D for changes
  c4d.EventAdd()

def main():
  
  AddLongDataType(obj)
  data = obj.GetUserDataContainer()
  setQuickTab(obj, data)

  doc.StartUndo()
  doc.InsertObject(inst)
  doc.AddUndo(c4d.UNDO_NEW, inst)
  doc.EndUndo()

if __name__=='__main__':
  main()