How to turn off/on a collider using a bool variable from another script

Questions & Answers
1

Hi, I’m new to C# and am struggling to get my head around some of the syntax.

What I want to do is turn off a capsule collider which is on my ground object, but only if the player is in a certain ‘form’

I have created 2 Scripts.

One is for my Player. Within this player script there is a public bool called ‘IsBlue’. This is toggled on/off with the return key.

I then have another script attached to a ground platform. This platform has 2 colliders. one for the actual surface of the platform which acts as the actual ground. Another which is a capsule collider which surrounds the platform. This Capsule collider has a material with Bounce properties attached to it.
The Capsule collider is the one I want to switch off if the ‘IsBlue’ bool from my player script is true.

I have attached the relevant code from each script below.

My Players Script (The game object it’s assigned to is called PlayerObj. The scripts name is Player):

  using UnityEngine;
  using System.Collections;

   public class Player : MonoBehaviour
    {

    //Bool to identify if blue
     public bool IsBlue = false;



   // Use this for initialization
   void Start()
   {
   }

    // Update is called once per frame
   void Update()
   {

       //button press to toggle blue on/off
       if (Input.GetKeyDown(KeyCode.Return))
       {
           IsBlue = !IsBlue;
       }
    }
  }

My Platform script(Attached to the game object Redplatform);

using UnityEngine;
using System.Collections;

public class RedMagnet : MonoBehaviour
{
     private CapsuleCollider capsuleCollider;
     private Player player;

void Sart()
{
    capsuleCollider = GetComponent<CapsuleCollider>();
    player = GameObject.FindGameObjectWithTag("PlayerObj").GetComponent<Player>();
}

void Update()
{
    // check if the player is blue and do something
    if (player.IsBlue)
    {
        capsuleCollider.enabled = false;
    }
    else
    {
        capsuleCollider.enabled = true;
     }
   }
  }

The scripts have been attached to their relevant game objects and the game runs. However the capsule collider is not witching on or off? I made the ‘IsBlue’ bool public so I can see it toggling on/off. that is working. But the capsule collider is just staying on. The only error i’m getting is

‘NullReferenceException: Object reference not set to an instance of an object
RedMagnet.Update () (at Assets/Code/Scripts/RedMagnet.cs:18)’

RedMagnet.cs is the name of the script for the platform.

Any ideas?

2

MMmpies answered this for me :slight_smile: