Objects with tags inside python generator

Helper

On 21/09/2015 at 07:15, xxxxxxxx wrote:

Thanks again Sebastian,

I feel really stupid to ask this, but how can I call manually made xpresso node when I don't know its ID? There is no any command like GetFirstNode(). As far I can get is to call the main XGroup with this code:

nm = x.GetNodeMaster()  
root = nm.GetRoot()  
owner = nm.GetOwner()  
print root

I'm sorry that I keep asking different questions in this same topic. Should I make everytime new topic for every question?

Helper

On 21/09/2015 at 09:42, xxxxxxxx wrote:

Hello,

like most classes of the API, GvNode ist based on BaseList2D and GeListNode. This means you can get the child objects of the root node with GeListNode.GetDown(). Then you can loop through the nodes using GeListNode. GetNext().

As long as your questions are related to the topic of creating Xpresso nodes you can continue in this threads. For other questions please open a new thread.

Best wishes,
Sebastian

Helper

On 21/09/2015 at 13:31, xxxxxxxx wrote:

Nice! Thank you.

I'm able to get node's ID with this script. I leave it here so it might be helpful for those who are struggling with same problem.

(Run in Script Manager)

import c4d  
  
# make xpresso tag and node manually  
# select xpresso tag and run the script  
  
def main() :  
  selection = doc.GetSelection()  
    
  for x in selection:  
        
      nm = x.GetNodeMaster()  
      root = nm.GetRoot()  
    
      firstNode = root.GetDown()          
      firstNodeID = firstNode.GetOperatorID()  
        
      print firstNodeID  
    
  c4d.EventAdd()  
  
if __name__=='__main__':  
  main()

I'm almost there. Messing with ports are now giving me a headache.

nm = x.GetNodeMaster()  
root = nm.GetRoot()  
  
objectNode = nm.CreateNode(nm.GetRoot(), 400001000, None, 0, 0)  
objectIndexNode = nm.CreateNode(nm.GetRoot(), 400001152, None, 0, 0)  
  
# Check it is OK to add port?  
print objectNode.AddPortIsOK(c4d.GV_PORT_INPUT, c4d.GV_OBJECT_OPERATOR_OBJECT_IN)  
 **# prints True - everything should be fine**  
  
# Try to add port  
objectNode.AddPort(c4d.GV_PORT_INPUT, c4d.GV_OBJECT_OPERATOR_OBJECT_IN)  
 **# Nothing happens - port does not appear**  
  
# Try to connect two ports  
portA_IN = objectNode.GetInPort(0)  
portB_OUT = objectIndexNode.GetOutPort(0)         
portA_IN.Connect(portB_OUT)  
 **# AttributeError: 'NoneType' object has no attribute 'Connect'**

I'm not sure what is wrong.

Helper

On 22/09/2015 at 00:16, xxxxxxxx wrote:

Hello,

currently there is a bug with creating object ports. See "OBJECT_OPERATOR_OBJECT_OUT".

best wishes,
Sebastian

Helper

On 22/09/2015 at 07:14, xxxxxxxx wrote:

Hi and thanks,

So there is way to go around that object port bug with user data field. Very nice!

I'm also able to add other kind of ports to nodes, but when I try to connect two ports together, no matter what nodes type is, I get error message: **AttributeError: 'NoneTpye' object has no attribute 'Connect'.
**
Sample code

formulaNode = nm.CreateNode(nm.GetRoot(), 400001133, None, 0, 0)  
mathNode = nm.CreateNode(nm.GetRoot(), 400001121, None, 0, 0)  
    
portA = mathNode.GetPort(c4d.GV_MATH_INPUT)  
portB = formulaNode.GetPort(c4d.GV_FORMULA_OUTPUT)  
        
portA.Connect(portB)

Helper

On 22/09/2015 at 10:21, xxxxxxxx wrote:

Hello,

the problem is that the ports could not be found. Access the ports by the index:

  
portA = mathNode.GetInPort(0)  
portB = formulaNode.GetOutPort(0)  
  
portA.Connect(portB)

best wishes,
Sebastian

Helper

On 23/09/2015 at 00:28, xxxxxxxx wrote:

Thank you so much!

Now everything makes sense. Now I'm gonna work with this my thing and I will share the final product when and if I get it done.

Helper

On 23/09/2015 at 12:48, xxxxxxxx wrote:

Hi,

I'm having now weird problems. Adding object port with DescID is not working. I'm using command:

basenode.AddPort(c4d.GV_PORT_OUTPUT, c4d.DescID(c4d.DescLevel(c4d.ID_USERDATA, c4d.DTYPE_SUBCONTAINER, 0), c4d.DescLevel(1)), message = True)

I "emulated" the problem with manually made objects and script manager.

Null
-->Cloner

This code works perfectly:

import c4d  
  
def main() :  
  #doc = c4d.documents.GetActiveDocument()  
  #pointobject = doc.GetActiveObject()  
     
  userdata = c4d.GetCustomDatatypeDefault(c4d.DTYPE_BASELISTLINK)  
  userdata[c4d.DESC_NAME] = "Object Data"  
  
  child = op.GetDown()  
    
  linkobject = child.AddUserData(userdata)  
  child[linkobject] = child  
  
  xpressotag = c4d.BaseTag(c4d.Texpresso)  
  xpressotag.SetName("PointLock XPresso")  
    
  child.InsertTag(xpressotag)  
    
  nodemaster = xpressotag.GetNodeMaster()  
  basenode = nodemaster.CreateNode(nodemaster.GetRoot(), c4d.ID_OPERATOR_OBJECT, None, 100, 100)  
    
  basenodeobjectoutput = basenode.AddPort(c4d.GV_PORT_OUTPUT, c4d.DescID(c4d.DescLevel(c4d.ID_USERDATA, c4d.DTYPE_SUBCONTAINER, 0),\  
c4d.DescLevel(1)), message = True)  
    
  #basenodepositionoutput = basenode.AddPort(c4d.GV_PORT_OUTPUT, c4d.ID_BASEOBJECT_REL_POSITION)  
  #c4d.modules.graphview.RedrawMaster(nodemaster)  
  
    
  c4d.EventAdd()  
  
if __name__=='__main__':  
  main()

But when I try to run same kind of code with python generator it is not making the object port. I also first need to insert cloner under null object and return the null to get user data field to cloner. If I try to return only the cloner it comes without user data. Is it the bug or do I need to play with DescID?

Helper

On 24/09/2015 at 00:53, xxxxxxxx wrote:

Hello,

in a Script Manager script "op" refers to the currently selected object. In a Python Generator it refers to the Generator Object. Maybe this is the difference.

Best wishes,
Sebastian

Helper

On 24/09/2015 at 07:21, xxxxxxxx wrote:

Hi,

I know that. I'm not using op variable in Python Generator.

Helper

On 24/09/2015 at 09:40, xxxxxxxx wrote:

Hello,

what code do you use in your Python Generator?

Best wishes,
Sebastian

Helper

On 24/09/2015 at 14:01, xxxxxxxx wrote:

Hello,

I'm using this code in Python Generator.

import c4d  
  
def main() :  
  nul = c4d.BaseObject(5140)                                      # create a null  
  clr = c4d.BaseObject(1018544)                                   # create a cloner  
  link = op[c4d.ID_USERDATA,2]                                    # object  
  num = 5                                                         # number  
  userdata = c4d.GetCustomDatatypeDefault(c4d.DTYPE_BASELISTLINK) # user data type  
  userdata[c4d.DESC_NAME] = "Object Data"                         # user data name  
  clr.InsertUnder(nul)                                            # insert cloner under the null  
  clr[c4d.ID_MG_MOTIONGENERATOR_MODE] = 0                         # set cloner to object mode  
  clr[c4d.MG_OBJECT_LINK] = link                                  # link object to cloner  
   
  ###     
   
  # create user data field  
  linkobject = clr.AddUserData(userdata)  
  clr[linkobject] = clr  
  
  # xpresso stuff  
  xpressotag = c4d.BaseTag(c4d.Texpresso)  
  clr.InsertTag(xpressotag)  
  nodemaster = xpressotag.GetNodeMaster()  
    
  # create nodes  
  basenode = nodemaster.CreateNode(nodemaster.GetRoot(), c4d.ID_OPERATOR_OBJECT, None, 100, 100)  
  datanode = nodemaster.CreateNode(nodemaster.GetRoot(), 1019010, None, 0, 0)  
    
  # create ports  
  basenode.AddPort(c4d.GV_PORT_OUTPUT, c4d.DescID\  
  (c4d.DescLevel(c4d.ID_USERDATA, c4d.DTYPE_SUBCONTAINER, 0), c4d.DescLevel(1)), message = True)  
    
  # create connections  
  basenodeobjectoutput = basenode.GetOutPort(0)  
    
  datanodeinput = datanode.GetInPort(0)  
  datanodeoutput = datanode.GetOutPort(0)  
    
  basenodeobjectoutput.Connect(datanodeinput)                     # << error >>  
  
  ####  
  
  for i in xrange(num) :  
      obj = c4d.BaseObject(5159)                                  # base spline text  
      obj.InsertUnderLast(clr)                                    # insert clone under the cloner  
  
  # return final object  
  return nul

If I don't insert cloner under the null object I don't get user data tab to the cloner.

Helper

On 25/09/2015 at 09:05, xxxxxxxx wrote:

Hello,

it seems that you are using the "op" variable in line 6 of your code. In the code you provided "basenodeobjectoutput" is not defined.

You are creating a Object Node without defining what object this node should reference. You can define the referenced object by setting the GV_OBJECT_OBJECT_ID parameter. Something like this:

  
objectNode.SetParameter(c4d.GV_OBJECT_OBJECT_ID, linkedObject, c4d.DESCFLAGS_SET_0)

best wishes,
Sebastian