4. Sending a message to an objectdata plugin

Sending a message to an objectdata plugin

  • H

    On 26/09/2017 at 15:08, xxxxxxxx wrote:

    Is it possible to send a message to a object data plugin?

    I am using this little script to trigger an object data plugin.

    def main() :
    
    plugin_2_obj = c4d.plugins.FindPlugin(plugin_id)
    MY_CUSTOM_MSG_ID = 4
    python_object_to_send = [1,2,3,4,4] 
    plugin_2_obj.Message(MY_CUSTOM_MSG_ID, python_object_to_send )
  
if __name__=='__main__':
    main()

    In the object data plugin I have following:

        def Message(self, node, type, data) :
        if (type == 4) : print "type: ", type
        return True
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  • H

    On 27/09/2017 at 01:19, xxxxxxxx wrote:

    Hello,

    a NodeData base plugin can only receive the data of special, hardcoded messages. So if you want to sent data to that plugin you must use a registered message type/ID.

    There is a message c4d.MSG_BASECONTAINER which allows to send a BaseContainer. It seems that it can be used to send arbitrary data.

      
bc = c4d.BaseContainer()  
bc.SetInt32(0, 100)  
bc.SetInt32(1, 200)  
  
op.Message(c4d.MSG_BASECONTAINER, bc)  

      
def Message(self, node, type, data) :  
  
  if type == c4d.MSG_BASECONTAINER:  
      print("Data:")  
      for value in data:  
          print(value)

    But please test carefully if this has any side effects.

    BTW why are you using FindPlugin()? This is not used to access an instance of an ObjectData plugin in a document.

    best wishes,
    Sebastian

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  • H

    On 27/09/2017 at 01:47, xxxxxxxx wrote:

    Another solution could be to use CoreMessage.
    https://plugincafe.maxon.net/topic/6808/7564_how-to-identify-different-calls-to-coremessage

    So it's the time for asking what the difference beetwen Message and Core Message?
    As I understand Message are only send to one object using node.Message()
    While CoreMessage are propagate throught all nodes

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  • H

    On 27/09/2017 at 02:13, xxxxxxxx wrote:

    Hello,

    core messages do NOT propagate through all nodes. Please read the Core Messages Manual carefully.

    best wishes,
    Sebastian

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  • H

    On 27/09/2017 at 02:59, xxxxxxxx wrote:

    Thanks for correct me, was not sure about that!

    So what's the difference beetween both? (I speak in term of implementation)

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  • H

    On 27/09/2017 at 03:13, xxxxxxxx wrote:

    "BTW why are you using  FindPlugin()? This is   **not  **used to access an instance of an ObjectData plugin in a document."

    I need to send a message to the plugin. So I need the plugin object and FindPlugin() gives me the object (I thought).

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  • H

    On 27/09/2017 at 03:45, xxxxxxxx wrote:

    An ObjectData return an object, so basicly you do

    obj = doc.GetFirstObject()
if not obj.CheckType(YOUR_PLUGIN_ID) : return
  
bc = c4d.BaseContainer()
bc.SetInt32(0, 100)
bc.SetInt32(1, 200)
obj.Message(c4d.MSG_BASECONTAINER, bc)

    FindPlugin only give you a BasePlugin which is not an instance of your ObjectData object

    c4d.plugins.BasePlugin :
    Represents a registered Cinema 4D plugin. Cannot be instantiated.

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  • H

    On 27/09/2017 at 05:32, xxxxxxxx wrote:

    Ok, clear.
    Thanks, Pim

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