Selecting between 4 objects script

I have four ships in my scene, and I want to give the player the ability to change between these objects by using left/right keys. I also want to make the ship that is selected set its boolean (like "Active") true. Also, I want to make an arrow over follows the selected ship to tell the player which one is selected.

Any ideas how to make this?

EDIT: To add on this, the four ships are identical objects with the same scripts, so if one of them have its boolean changed, will it affect the others' boolean values?

 

Here's a start.
You could use an array to store your ships then use an integer to cycle between them.

Code (JavaScript):

1. var ships : Transform[];
2. var shipIndex : int;
3.  
4. function Update(){
5. ships[shipIndex].active = true;
6.  
7. if(Input.GetKeyDown(KeyCode.RightArrow)){
8. shipIndex++;
9. if(shipIndex>= ships.Length){
10. shipIndex= 0;
11. }
12. }
13. }

As long as the script is on a totally different gameObject then it wont affect the other booleans.

 

Look into Input functions:
http://docs.unity3d.com/ScriptReference/Input.html (scroll down to Static Functions)

Look into Variables:
http://unity3d.com/learn/tutorials/modules/beginner/scripting/variables-and-functions

This could be done a number of ways. A simple way to do this would be to create a child gameobject for each ship that is initially disabled, though if your Boolean "Active" is true, the arrow object for that active ship can be enabled to display. Another way would be to create a single arrow gameobject and interpolate its position accordingly.

Maybe look into the Renderer to hide/show gameobjects:
http://docs.unity3d.com/ScriptReference/Renderer.html

The links above and Intense_Gamer94's snippet should get you on the right track.

 

Brilliant. However, this line of code looks missing. In C#, how do I change the boolean in the target's script using GetComponent (probably)?

 

Code (CSharp):

1. ships[shipIndex].GetComponent<ShipScript>().isActive = true;

Replace "ShipScript" with the name of the script with the boolean & replace "isActive" with the actual boolean variable.