Adding Force with a GUI button

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Nother question for everyone. I have an object that walks back and forth on the screen. I want to be able to use a "jet pack" by clicking a GUI button that will add force to the object. Here's the code I have. Maybe it's completely wrong but I'm trying to basically find the player then add force to it...

var normalTex : Texture2D; var hoverTex : Texture2D; var Player;

 //Define Player function Start (){

 Player = GameObject.FindWithTag("Player");

   function OnMouseEnter () {
  guiTexture.texture = hoverTex;
   }


   function OnMouseExit(){
    guiTexture.texture = normalTex;
   }

 //Apply force for Jet Pack function OnMouseDown(){

     Player.rigidbody.AddForce (transform.up*1);
     Debug.Log("clicked");

}

The button is being clicked but nothing happens to the player. As always, help is really appreciated! Thank you!

Answer 1

Best Answer

Answer by Earth-O-Matic · Mar 24, 2011 at 04:20 AM

Alright figured it out. The code I just put up was correct. but I was multiplying the Y value. When it's not moving up there is nothing to multiply...duh.... any way. Here is the finished code for any one else looking to have a GUI button manipulate an object.

var Jpack : Texture2D; var position : Rect; var style : GUIStyle; var Player : GameObject;

function OnGUI () { if (GUI.Button (position, Jpack, style))

     Player.rigidbody.velocity.y += 10;
     print ("you clicked the icon");
 }

Where GameObject is the object you are trying to manipulate.

I ended up ditching the GUI Texture and went to adding GUI code on the camera making it much cleaner.

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Answer 2

Answer by kennypu · Mar 22, 2011 at 01:12 AM

where are you actually drawing the button? the code for what happens when you click on the button should be there. eg:

if(GUI.Button(/*drawing button stuff here*/))
{
  //do something that happens when button is pressed
}

I'm assuming you're just using the GUI.Button incorrectly. you should look at the scripting reference next time.

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Earth-O-Matic · Mar 22, 2011 at 03:35 AM 0

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This code is on the button itself. I created a GameObject > GUI texture then applied this script to it. I'll look into GUI.Button

Answer 3

Answer by Earth-O-Matic · Mar 23, 2011 at 12:17 AM

Probably need to re-phrase. The issues I'm having is that the addforce isn't working. I have used this code to effectively do a translate movement like transform.translate (vector3(0,10,0)). I can get it to jump like I want it to but the problem is it jerks up into the air instead of a nice smooth movement like a jet pack would have. So I am trying addforce instead but it is not working. That's the issues I'm having not that the button does nothing.

I am using a GUI texture and applying this script to it and it works. I've gotten it to do a transform.translate and it returns the debug text. My problem is the addforce not working, not the button itself.

If I'm doing this in a less than efficient way please let me know that too. As always, thank you for help!

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Answer 4

Answer by efge · Mar 23, 2011 at 12:24 AM

Forces only affect Rigidbodies. So maybe you have to attach a rigidbody to your object.

But be careful, if you want to add forces attach a rigidbody, if you want to control the object without physics (like you did before) set rigidbody.isKinematic = true;

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Earth-O-Matic · Mar 23, 2011 at 04:20 AM 0

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I'm kinda doing a bit of both. I'm giving it constant movement because I don't want the player controlling the character directly but the character can be shot upwards or fall down. so the character has a rigidbody set to it. I'll toy around with it a bit more. See if I can get closer.

Answer 5

Answer by Earth-O-Matic · Mar 23, 2011 at 06:23 AM

Almost there I think. I have changed the button from a GUI Texture to some GUI code on the main camera itself...

var Jpack : Texture2D; var position : Rect; var style : GUIStyle; var Player : GameObject;

function OnGUI () { if (GUI.Button (position, Jpack, style))

     Player.rigidbody.velocity.y *= 20;
     print ("you clicked the icon");
 }

It is definitely manipulating the player now but it seems to be caught up on the ground and not really moving. I need to be clicking the button a lot while its moving around and maybe at some point it will hit something correctly that it will jump in the air. Any thoughts?

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Adding Force with a GUI button

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