Using Python to create ports on Object nodes

Helper

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On 07/09/2012 at 09:54, xxxxxxxx wrote:

C4D R13
Python

------

I've finished browsing an old PluginCafe post that discusses this concept, but can't seem to figure it out.

What I CAN do: create an object node in XPresso, and 'fill' it with an object.
What I CANNOT do: Create an object port on said node.

The previously mentioned post says that you can use the IDs used in gvobject.res, in a fashion such as this:

 OBJ_IN = OBJ.AddPort(c4d.GV_PORT_INPUT, c4d.GV_OBJECT_OPERATOR_OBJECT_IN, flag = c4d.GV_PORT_FLAG_IS_VISIBLE)

However, while this doesn't cause an error to come up in my script, a port is not created - If I try to run a print command on OBJ_IN, I get 'None'. I've tried to create several other ports listed on gvobject.res, but no dice.

The only port I was able to create was a c4d.ID_BASEOBJECT_POSITION port, but it's an ID not listed in gvobject.res.

Does anyone know where I might find the correct id for an object port?

Thanks,
Luke

Helper

On 02/01/2013 at 11:42, xxxxxxxx wrote:

I'm having the exact same problem on that object operator. I even tried setting custom ID's in the gvobject.h file, but nothing. Have you found a solution?

import c4d
#Welcome to the world of Python

def main() :

    # create a cube
    cube = c4d.BaseObject(c4d.Ocube)
    # insert cube into scene
    doc.InsertObject(cube)

# create xpresso tag
    xpressoTag = c4d.BaseTag(c4d.Texpresso)
    # insert xpresso tag to the cube
    cube.InsertTag(xpressoTag)

    # get node master
    nodeMaster = xpressoTag.GetNodeMaster()

# create object node for cube in xpresso
node1 = nodeMaster.CreateNode(nodeMaster.GetRoot(), c4d.ID_OPERATOR_OBJECT, None, 0, 0)
node1[c4d.GV_OBJECT_OBJECT_ID] = cube

# add object out port to node
    port1 = node1.AddPort(c4d.GV_PORT_OUTPUT, c4d.GV_OBJECT_OPERATOR_OBJECT_OUT)

    c4d.modules.graphview.RedrawMaster(nodeMaster)
    c4d.EventAdd()

    return

No object out port is created???

Helper

On 02/01/2013 at 12:21, xxxxxxxx wrote:

Unfortunately, I'm still in the dark on this one.

Helper

On 02/01/2013 at 17:39, xxxxxxxx wrote:

Hmmm, I tried to work around it and create a userdata link -> put the object in the link -> and then pull up the userdata port in the node. Which can be done, see script below. But now the node is highlighting yellow, which still prevents the xpresso set up from working.

import c4d
#Welcome to the world of Python

def main() :

    # create a cube
    cube = c4d.BaseObject(c4d.Ocube)
    # insert cube into scene
    doc.InsertObject(cube)

    # create a link userdata
    bc = c4d.GetCustomDataTypeDefault(c4d.DTYPE_BASELISTLINK)
    bc[c4d.DESC_NAME] = "obj"
    linkDataType = cube.AddUserData(bc)
    # set the link userdata
    cube.__setitem__((c4d.ID_USERDATA,1), cube)

# create xpresso tag
    xpressoTag = c4d.BaseTag(c4d.Texpresso)
    # insert xpresso tag to the cube
    cube.InsertTag(xpressoTag)

    # get node master
    nodeMaster = xpressoTag.GetNodeMaster()

# create object node for cube in xpresso
node1 = nodeMaster.CreateNode(nodeMaster.GetRoot(), c4d.ID_OPERATOR_OBJECT, None, 0, 0)
node1[c4d.GV_OBJECT_OBJECT_ID] = cube

# add userdata out port to node
    port1 = node1.AddPort(c4d.GV_PORT_OUTPUT, (c4d.ID_USERDATA,1))

    c4d.modules.graphview.RedrawMaster(nodeMaster)
    c4d.EventAdd()

    return

How can I prevent the node from highlighting yellow? There are no problems creating the nodes and ports manually. Is something wrong with my code?

thanks

Helper

On 03/01/2013 at 07:58, xxxxxxxx wrote:

hey,

i do not really have a solution for you but nevertheless :

1. please use code tags ([kode][/kode] - kode written with c of course)

2. on topic. your code looks fine. i think there is something going wrong in the port creation. i
have changed the port type to a less complicated one (suspected first the UserData ID tuple as
the culprit) and then used the AddPortIsOk method. It always returns False for me, which i
understand as 'something is going really wrong here, but you cannot do anything about it'.

pid = (c4d.PRIM_CUBE_LEN)
print node1.AddPortIsOK(c4d.GV_PORT_OUTPUT, pid) # always false
port1 = node1.AddPort(c4d.GV_PORT_OUTPUT,pid, c4d.GV_PORT_FLAG_IS_VISIBLE, True )

Helper

On 25/03/2013 at 04:25, xxxxxxxx wrote:

Hey everyone. I'm having the exact same problem with AddPort and yellow node. Can please someone say what's wrong?

import c4d
  
def main() :
    #new Extrude NURBS
    c4d.CallCommand(5116)
    Nrbs = doc.GetActiveObject()    
    Nrbs[c4d.CAP_START] = Nrbs[c4d.CAP_END] = 3;
    tag = Nrbs.MakeTag(c4d.Texpresso)
    master = tag.GetNodeMaster() 
       
    #new node
    nodeOut = master.CreateNode(master.GetRoot(),c4d.ID_OPERATOR_OBJECT,None,100,100)
    
    #new userdata
    UD = c4d.GetCustomDataTypeDefault(c4d.DTYPE_REAL);
    UD[c4d.DESC_NAME] = 'fillet';
    add2 = Nrbs.AddUserData(UD);
    Nrbs[add2] = 5;
    
    #outpot port
    nodeOut.AddPort(c4d.GV_PORT_OUTPUT, (c4d.ID_USERDATA, 1));
    
    c4d.EventAdd();
  
if __name__=='__main__':
    main()

littledevil, I've tried

nodeOut.AddPort(c4d.GV_PORT_OUTPUT, [c4d.ID_USERDATA,1], c4d.GV_PORT_FLAG_IS_VISIBLE, True )

but hte result is the same

Helper

On 08/10/2013 at 23:16, xxxxxxxx wrote:

I haven't revisited this project recently but I found another post that looks promising in regards to the yellow nodes.

https://developers.maxon.net/forum/topic/7475/9303_port-creation

Helper

On 24/05/2015 at 16:31, xxxxxxxx wrote:

Any news on this yet? Surely we can add an object link port to an xpresso node without creating custom userdata!?

Helper

On 26/05/2015 at 07:53, xxxxxxxx wrote:

Hello,

as discussed earlier there is currently a bug with the object ports. See also this thread:

OBJECT_OPERATOR_OBJECT_OUT
best wishes,
Sebastian