Creating Xpresso Python Node Inputs

A Former User

Hello,
I'm having a hard time finding documentation about accessing the input ports for the Python Xpresso node, specifically the 'On' port. I know about op.GetInPorts(), but it isn't returning anything. How could I add any of these data types for that matter? Where would I find the IDs for them?

pythonNode = gv.CreateNode(gv.GetRoot(), 1022471, insert=None, x=200, y=0) #Create python node
onId = c4d.DescID(c4d.DescLevel(?????))
pythonNode.AddPort(c4d.GV_PORT_INPUT, onId)

Thank you!

iluxa7k

Hello

onId = c4d.DescID(c4d.DescLevel(3999,400006001,1022471))

A Former User

@iluxa7k said in Creating 'On' Python Xpresso Node Input:

onId = c4d.DescID(c4d.DescLevel(3999,400006001,1022471))

Hi @iluxa7k , thank you for the reply! May I please ask, how did you find this DescID? How can I find the other ports'?

A Former User

For future people reading this post, I found answers in the C++ documentation for the GV_PYTHON_OPENEDITOR file reference.

'''
In this DescID: c4d.DescID(c4d.DescLevel(3999,400006001,1022471))
3999 is the ID for the parameter (GV_PYTHON_ON)
400006001 is the ID for the Data type (ID_GV_DATA_TYPE_BOOL)
1022471 is the Python Tag Id
'''

onId = c4d.DescID(c4d.DescLevel(c4d.GV_PYTHON_ON,c4d.ID_GV_DATA_TYPE_BOOL,1022471))
longId = c4d.DescID(c4d.DescLevel(c4d.IN_LONG,c4d.ID_GV_DATA_TYPE_INTEGER,1022471))
linkId = c4d.DescID(c4d.DescLevel(c4d.IN_LINK,c4d.DTYPE_BASELISTLINK,1022471))
xnode_python.AddPort(c4d.GV_PORT_INPUT, onId)
xnode_python.AddPort(c4d.GV_PORT_INPUT, longId)
xnode_python.AddPort(c4d.GV_PORT_INPUT, linkId)

I do still have questions about how I'd find the DescIDs of this node's parameters through Python if anyone wants to chime in. Thank you.

m_adam

Hi unfortunately I didn't found a precise way (except looking into the C++ header file as you did) to find possible IDs.
Another way could be to add ports you want to add to a node and then from this GvNode you can retrieve all GvPort and their ID. Find an example that iterates all input ports remove them and re-add them

import c4d

def main():
    if not op:
        return
    
    xpressoTag = op.GetTag(c4d.Texpresso)
    if not xpressoTag:
        return
    
    gvMaster = xpressoTag.GetNodeMaster()
    gvRoot = gvMaster.GetRoot()
    gvNode = gvRoot.GetDown()
    
    ports = gvNode.GetInPorts()
    portDescIds = []
    for port in ports:
        print port.GetName(gvNode), port.GetMainID(), port.GetValueType()
        portDescIds.append(c4d.DescID(c4d.DescLevel(port.GetMainID(), port.GetValueType(), port.GetNode().GetOperatorID())))
        port.GetNode().RemovePort(port, True)
        
    print portDescIds
    
    for portDescId in portDescIds:
        gvNode.AddPort(c4d.GV_PORT_INPUT, portDescId)
        
    c4d.EventAdd()
    
    

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

Cheers,
Maxime.

A Former User

@m_adam That's a great solution, thank you!