Triggering GUI Button from collision with GameObject

Question

Hi I'm trying to trigger 3 GUI Buttons when the player collides with an empty game object, but I am getting this error.

SendMessage Contact has no receiver! UnityEngine.Component:SendMessageUpwards(String) InterActing:OnTriggerEnter(Collider) (at Assets/Scripts/Controllers/InterActing.js:5)

On my empty game object I have this script

 var SendMessageUpwards:GameObject;
 
 function OnTriggerEnter (other : Collider) {
     if (other.CompareTag ("Player")) {
         SendMessageUpwards ("Contact");
     }
 }    
 function OnTriggerExit (other : Collider) {
     if (other.CompareTag ("Player")) {
         SendMessageUpwards ("NoContact");
     }
 }

On my Player I have the following script

 @script ExecuteInEditMode ();
 var firstChoice = TextureGUI();
 var secondChoice = TextureGUI();
 var thirdChoice = TextureGUI();
 var noGuiStyle : GUIStyle;
 var soundOne : AudioClip;
 var soundTwo : AudioClip;
 var soundThree : AudioClip;
 var isInteracting = false;
 private var pathChoice:String = "";
 private var screenCenter:Vector2;
 
 
 function Contact() {
     isInteracting = true;
     pathChoice = "";
 }
 
 function NoContact() {
     isInteracting = false;
 }
 function OnGUI () {
 if (isInteracting) {
         screenCenter.x = Screen.width/2;
         screenCenter.y = Screen.height/2;
         GUI.color = Color(.1,.1,.1,.8); 
         GUI.color = Color.white;
         
         if (GUI.Button(Rect(screenCenter.x+firstChoice.offset.x,screenCenter.y+firstChoice.offset.y,firstChoice.texture.width,firstChoice.texture.height),firstChoice.texture,noGuiStyle)) {
                 pathChoice = "firstpath";
                 audio.PlayOneShot(soundOne);
                 RunCommand(pathChoice);
         }
         
         if (GUI.Button(Rect(screenCenter.x+secondChoice.offset.x,screenCenter.y+secondChoice.offset.y,secondChoice.texture.width,secondChoice.texture.height),secondChoice.texture,noGuiStyle)) {
                 pathChoice = "secondpath";
                 audio.PlayOneShot(soundTwo);
                 RunCommand(pathChoice);
         }
         
         if (GUI.Button(Rect(screenCenter.x+thirdChoice.offset.x,screenCenter.y+thirdChoice.offset.y,thirdChoice.texture.width,thirdChoice.texture.height),thirdChoice.texture,noGuiStyle)) {
                 pathChoice = "thirdpath";
                 audio.PlayOneShot(soundThree);
                 RunCommand(pathChoice);
         }        
     }
 }
         
 function RunCommand(pathChoice:String) {
     switch(pathChoice) {
     
         case "firstpath":
             isInteracting = false;
             break;
             
         case "secondpath":
             isInteracting= false;
             break;
             
         case "thirdpath":
             isInteracting = false;
             break;
             
         }
         
 }

And do not know were I am going wrong in my code and would appreciate any help in solving this issue. Thank you

Answer 1

I don't think you are using the SendMessageUpwards correctly. It is used to run functions on the parent(s) of an object. I assume your empty gameobject is not the child of teh player, thus this wouldn't work. Even if it was, you don't need to define the SendMEssageUpwards as a variable in the beginning, you would just do this

 function OnTriggerEnter (other : Collider) {
     if (other.CompareTag ("Player")) {
         other.gameObject.SendMessageUpwards ("Contact");
     }
 }    
 function OnTriggerExit (other : Collider) {
     if (other.CompareTag ("Player")) {
         other.gameObject.SendMessageUpwards ("NoContact");
     }
 }

However, that is only going to work if the player is a parent of the empty gameObject.

Otherwise for a less resourceful way, do this:

 function OnTriggerEnter (other : Collider) {
     if (other.CompareTag ("Player")) {
         other.gameObject.GetComponent("PlayerScriptName").Contact();
     }
 }    
 function OnTriggerExit (other : Collider) {
     if (other.CompareTag ("Player")) {
         other.gameObject.GetComponent("PlayerScriptName").NoContact();
     }
 }

OR if you really wanted to use SendMessage:

 function OnTriggerEnter (other : Collider) {
     if (other.CompareTag ("Player")) {
         other.gameObject.SendMessage("Contact");
     }
 }    
 function OnTriggerExit (other : Collider) {
     if (other.CompareTag ("Player")) {
         other.gameObject.SendMessage("NoContact");
     }
 }

Hope this helps. Be sure to tell me if this doesn't work.

Answer 2

Answer by Codebreaker73 · Apr 17, 2012 at 08:01 PM

Man thank you so much but ran into a few issues further issues.

 var guideOne : AudioClip;
 var objectOfAnimation : GameObject;
 var guidePoint:AnimationClip;
 
 function OnTriggerEnter (other : Collider) {
     if (other.CompareTag ("Player")) {
         other.gameObject.SendMessage("Contact");
         animation.Play("GuidePointingBehind"); 
         audio.PlayOneShot(guideOne);
     }
 }    
 function OnTriggerExit (other : Collider) {
     if (other.CompareTag ("Player")) {
         other.gameObject.SendMessage("NoContact");
         animation.Play("GuideIdle"); 
     }
 }

if you have any ideas I really would appreciate it. But thank you again for the above solution.

Add comment · Show 4 · Share

Lttldude · Apr 17, 2012 at 08:42 PM 0

Share

Your welcome, glad to help. :) What issues are you having with this new code? And be sure to select the answer above as correct by using the checkmark/thumb up.

Codebreaker73 · Apr 18, 2012 at 12:44 PM 0

Share

Oh duh my bad, the issue I'm running into is the animation is not playing and the audio continues to play when you exit the collider. Also is there a way to delay the GUI buttons appearing on the screen until the audio has finished? Thank you again.

Codebreaker73 · Apr 19, 2012 at 09:05 PM 0

Share

Argh Never $$anonymous$$d figured out what I did wrong , forgot to add the animation to the character DUH , once again lttldude thank you

maroonrs2 · Apr 19, 2012 at 09:31 PM 0

Share

make sure you have Is Trigged :)

Triggering GUI Button from collision with GameObject

2 Replies

Your answer

Follow this Question

Related Questions