How to update the dat.gui panel programmatically #128

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1. kielnino commented on Mar 7, 2023

   

   kielnino

   on Mar 7, 2023

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   Hi @diegoferigo, if you are still interested, here is a first idea how to approach this:

   In the meshcat-javascript-viewer the set_control-comand is already available (see here). So what is left is to define a command in the commands.py like

   class SetControl:
       __slots__ = ["name", "callback", "value", "min", "max", "step", "keycode1", "keycode2"]
       def __init__(self, name, callback, value, min, max, step, keycode1, keycode2):
           self.name = name
           self.callback = callback
           self.value = value
           self.min = min
           self.max = max
           self.step = step
           self.keycode1 = keycode1
           self.keycode2 = keycode2
   
       def lower(self):
           return {
               u"type": u"set_control",
               u"name": self.name.lower(),
               u"callback": self.callback,
               u"value": self.value,
               u"min": self.min,
               u"max": self.max,
               u"step": self.step,
               u"keycode1": self.keycode1,
               u"keycode2": self.keycode2
           }

   and in the zmqserver.py we need to forward the comand by adding a elif case in the handle_zmq function:

   def handle_zmq(self, frames):
       [...]
       elif cmd == "set_control":
           self.forward_to_websockets(frames)
           self.zmq_socket.send(b"ok")
       [...]

   Now you can send the comand from your python script like:

   import zmq
   from meshcat.commands import SetControl
   
   context = zmq.Context()
   zmq_socket = context.socket(zmq.REQ)
   zmq_socket.connect(zmq_url)
   
   
   def set_control(self):
           cmd_data = SetControl(name='MyControl', callback=None, value='4', min=0, max=10, step=1, keycode1=None, keycode2=None).lower()
           zmq_socket.send_multipart([
               cmd_data["type"].encode("utf-8"),
               "".encode("utf-8"),
               umsgpack.packb(cmd_data)
           ])
           return zmq_socket.recv()