Is it possible to yield in a coroutine in order to call a command function to the server?

Unity Engine
1

For a class group project, I am required to incorporate the work of a different group into my project that covers networking. The basics of the other group’s requirements were to incorporate LUA into their code so that a user can program certain objects to follow those commands at runtime. (for example, they type “trans(0,30,2)” into a text box at runtime, and the object associated with this text box would move to the position (0,30,2) )
To do this, they are using coroutines to run the LUA code and translate it into C#.

Problem is, that the movement executed in a coroutine does not update over the server if the one who programs it to move is a client. (i.e. if the host moves an object, everyone sees. If a client moves an object, only that client sees).
I have been struggling to fix this for 4.5 weeks now, and have tried everything that I can think of to make it work, but it just doesn’t.
Today I came up with the possibility that if I call a command function within the coroutine and translate in the command function, rather than in the coroutine function, that I might have some luck. But in order to return to that spot in the coroutine, I am pretty sure that I need to use a yield function, but I am not sure how to call the command function using yield.

Could anyone help me figure out what to do? Or give me some more ideas on what else to try?

I am ready to say that it just can’t be done, so I would really appreciate some feedback.

To make my explanation (hopefully) make more sense, here is a snippet of code from a test I am creating to try to get Unity coroutines, in general, to work correctly. The basic idea of this code is that if a player on the server clicks the Tab button, the object should move a given amount of times between a certain amount of predefined points, after waiting for a given amount of time. (or this is my belief on how it works-- the code is a modified (LUA-less) version of what was given to me from the other group).
Where they interpolate the points to move the object, I want to call the command function.

 public void Translate(List<Vector3> list, float duration, int loopCount)
    {
        list = new List<Vector3>();
        Vector3 vec1 = new Vector3(1.0f, 0.25f, 1.0f);
        Vector3 vec2 = new Vector3(13.0f, 0.25f, -5.0f);
        Vector3 vec3 = new Vector3(-11.0f, 0.25f, 3.0f);

        list.Add(vec1);
        list.Add(vec2);
        list.Add(vec3);


        coroutine = StartCoroutine(MoveCoroutine(list, duration, loopCount));

        }

  public IEnumerator MoveCoroutine(List<Vector3> list, float duration, int loopCount)
    {

        while (loopCount > 0 || loopCount < 0)
        {
            loopCount= " + loopCount);
            foreach (Vector3 point in list)
            {
            
                translateTime = 0;
                init = LUAObjPrefab.transform.position;
                goal = point;
                translateDuration = duration;
                while (translateTime < duration)
                {
                    float dTime = Time.deltaTime;
                    translateTime += dTime;
                    translateDuration -= dTime;
                    //onTranslateAction(dTime);
                    yield return new WaitForEndOfFrame();
                    float lerpValue = Mathf.Clamp01(translateTime / duration);

                   
                    // ******WHERE I WANT TO YIELD!!!!!
                     //yield return new CmdServerTrans(init, goal, lerpValue);
                    
                     CmdServerTrans(init, goal, lerpValue)
                    
                    //what the other group had
                    //LUAObjPrefab.transform.position = Vector3.Lerp(init, goal, lerpValue);


                }
            }
            if (loopCount > 0)
            {
                --loopCount;
            }
        }

        gameObject.GetComponent<Rigidbody>().isKinematic = true;

        move = false;

        yield return 0;
    }

    [Command]
    void CmdServerTrans(Vector3 start, Vector3 end, float lerpTime)
    {
        LUAObjPrefab.transform.position = Vector3.Lerp(start, end, lerpTime);
    }
2

A command isn’t a coroutine so you can’t yield on it. You could just do a yield return null to pause a frame before doing the next thing. Probably a better architecture choice would be to create a queue that the CmdServerTrans fills, and in a coroutine that the server is running, pull items off that queue. Example:

List<UpdateVectors> updates = new List<UpdateVectors>();

[Command]
void CmdServerTrans(Vector3 start, Vector3 end, float lerpTime)
{
    //LUAObjPrefab.transform.position = Vector3.Lerp(start, end, lerpTime);
    updates.add(new UpdateVectors(start, end, lerpTime));
}

IEnumerator DoTransformOnServer()
{
    while(true)
    {
        // wait for new update.
        while(updates.count == 0) yield return null;
     
        // do update. 
        var anUpdate = updates[0];
        updates.removeAt(0);
        LUAObjPrefab.transform.position = Vector3.Lerp(anUpdate.start, anUpdate.end, anUpdate.lerpTime);
        yield return new WaitForSeconds(lerpTime);
    }
}

Note - this is an example , not working or tested code.