How do I return the connected port from the input port?

gheyret

Hi ~
I want to get which port the node's input port connects to. and I try to use gvport.getdestination () in the Python SDK, but I find that the port has to be the output port to return properly, and if the port is the input port, it returns an empty list.
Does anyone know how to return the connected port from the input port?

Cheers~

Manuel

Hello,

In C++ you would use GetIncomingSource but it's not implemented in python.

So the only way is to check for each node in the same Xgroup if any of it's outgoing port is linked to your node.

really not the best thing but that's the only workaround.

Cheers,
Manuel.

gheyret

All right. Thanks for your reply.
Cheers~

Manuel

Hello,

without feedback, i'll consider this thread as solved.

Cheers,
Manuel

bentraje

Is this still a limitation or is there now a better workfaround for this?

m_adam

Hi I just implemented GetIncomingSource and GetIncomingDestination, they will be available in the next update of Cinema 4D.

Cheers,
Maxime.

Dunhou

Hi @bentraje,
For a temp solution. it maybe stupid but can worked right now, it works with renderEngine libs, but you can easily custom with maxon and c4d api.

It also has some similar cousin：

GetConnectedPortsAfter
GetConnectedPortsBefore
GetPreNodePorts
GetNextNodePorts
GetAllConnectedPorts

Hope it can helps.

Cheers~
DunHou.

Codes:

import c4d
from renderEngine import node_helper as nodeHelper

def main() -> None:
    material = doc.GetActiveMaterial()
    helper = nodeHelper.NodeGraghHelper(material)
    act_node: maxon.GraphNode = helper.GetActiveNodes()
    if act_node:
        for port in helper.GetConnectedPortsAfter(act_node):
            print(port)
if __name__ == '__main__':
    main()

The Material and select the Standard BRDF

Return

standardmaterial@TUGeQqzyIx5ijJlA7el82W>com.redshift3d.redshift4c4d.nodes.core.standardmaterial.outcolor
output@P0Ey0yEAFJror7c4Oew95V<com.redshift3d.redshift4c4d.node.output.surface

m_adam

Hi @Dunhou in thsi case we are speaking about xpresso and not the new node, which already have this features with maxon.GraphModelHelper.GetDirectPredecessors.

But thanks a lot, this indeed looks useful !
Cheers,
Maxime.

bentraje

@Dunhou
Thanks for the reference but yea I'm unfortunately using the xpresso here instead of the new node editor.
Which in all regards, an unfortunate scenario is xpresso is not integrated to the new node editor.

@m_adam
Gotcha. Thanks. Looking forward to the update.