SendMessage , how can i send two parameter

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i made a function needs two parameter (damage : float , mod : float) when i made from another script : avatar.SendMessage(16,1) gives error. it tell me send message sends one parameter , function needs two. how can i send two parameters , srry for my eng. thanks

Answer 1

Best Answer

Answer by BerggreenDK · Dec 18, 2010 at 02:26 AM

You cant. Thats been my experience too.

As the "SendMessage" reference says here:

http://unity3d.com/support/documentation/ScriptReference/Component.SendMessage.html

function SendMessage 
(methodName : string, value : object = null, options : SendMessageOptions = SendMessageOptions.RequireReceiver) : void

methodName is the "function" you want to call on everyobject.

object is the value (ONE object)

BUT, you are not restricted to send a simple object (like integer). You can create your own "class/structure/object" and pass that one along as an object.

So make your own "package" of values you need to broadcast. Init that object and then send it.

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BerggreenDK · Dec 18, 2010 at 02:50 AM 0

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Alternatively you could use GetComponent to grab the scripts of the objects you want to "hit".

http://answers.unity3d.com/questions/8790/whats-the-difference-between-sendmessage-and-getcomponent

petersvp · Sep 28, 2016 at 11:23 PM 0

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You can safely pass Array of Objects as an object, and cast them back, like

 public void UtilsValueToFloat(object args)
 {
     object[] a = (object[])args;
     object obj = a[0];
     string prop = (string)a[1];
     float val = (float)a[2];

Answer 2

Answer by -hiTo- · May 01, 2012 at 04:13 AM

Actually, the SendMessage function takes 1 argument, but that argument could be an array. So just make a temporary object[] array, fill it with all your values, and fire it away.

 string a = "abc";
 string b = "def";
 string c = "ghi";
 string d = "jkl";
 
 private void Start()
 {
     object[] tempStorage = new object[4];
     tempStorage[0] = a;
     tempStorage[1] = b;
     tempStorage[2] = c;
     tempStorage[3] = d;
 
     SendMessage("MessageRecieved", tempStorage);
 }

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Rosa-Gao · Feb 07, 2013 at 07:29 AM 0

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it works! thanks! But, It's possible to make dynamic 'new object[]'? just like 'push()' in JavaScript.

starikcetin · May 19, 2015 at 08:30 PM 0

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Rosa Gao You can use Generic Lists.

Answer 3

Answer by unitydev0008 · Jan 21, 2011 at 09:40 AM

Sorry to answer an already answered question and it being so delayed, but you can send multiple parameters with a sendmessage in a sense. The way i have been doing it is make the function you need take a Vector2 argument in your case since you have 2 floats and then simply call Sendmessage and pass it a new vector2 with the floats u want to pass.

Example in C#:

Reciever:

private void AdjustHealth(Vector2 damageMod) { // Break the vector 2 into two floats float damage = damageMod.x; float mod = damageMod.y;

// Do your code }

Sender:

// Or however you trigger your sendmessage void OnTriggerEnter(Collider other) { other.SendMessage("AdjustHealth", new Vector2(16,1));

}

Again sorry for late answer just trying to help out =P

Note: u can also do this with vector3 to send 3 parameters.

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burnumd · Jan 21, 2011 at 05:46 PM 0

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It's not a bad solution per se, but it's very brittle. What happens when you want to send 8 floats or two strings? There's no Vector8 to help you there. It's much preferred to bundle up your parameters in a custom Object as in the accepted answer.

unitydev0008 · Jan 22, 2011 at 10:12 PM 0

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yea i was just suggesting it as a quick solution since only 2 floats were needed. but u are correct if u have anything more than 3 numbers it is not going to work... just trying to provide a simple alternative =P

bisaniyehocam · Jan 23, 2011 at 06:25 AM 0

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i like that good idea

unitydev0008 · Jan 23, 2011 at 09:03 PM 0

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Glad to help Eren, again as burnumd stated this is not the best way to go about it but it is simple and if u are passing floats it works well. I use it all the time and u can even use ints by casting them as an int when u convert them in the adjusthealth function.

SendMessage , how can i send two parameter

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