enabling a script with a trigger...please help

Unity Engine
1

Sorry in advance ,I looked all day in Unity Answers and on the forums but could not find the answer I’m looking for.

All I want to do is activate a script that is attached to an object when the player enters the trigger, and disable it when the player leaves the trigger.

This is the script I am tying to use to enable the script:

using UnityEngine; using System.Collections;

public class scripttrigger : MonoBehaviour {

void OnTriggerEnter(Collider other)
{
if (other.gameObject.tag == “Player”)
{
ConstantRotate ConstantRotate = other.gameObject.GetComponent();
ConstantRotate.enabled = true;
}
}

void OnTriggerExit(Collider other)
{
if (other.gameObject.tag == “Player”)
{
ConstantRotate ConstantRotate = other.gameObject.GetComponent();
ConstantRotate.enabled = false;
}
}

}

However I keep getting this error message :

NullReferenceException: Object reference not set to an instance of an object
scripttrigger.OnTriggerEnter (UnityEngine.Collider other) (at Assets/scripttrigger.cs:12)

I have the “scripttrigger” script attached to a cube which is set as a trigger and the object is parented to the trigger cube. The “ConstantRotate” script is attached to both the cube and the object and unchecked/disabled on both.

Can anyone please help me figure out what I’m doing wrong?

2

It sounds like you are trying to activate the script on the object entering the trigger when you want to be doing it to the trigger.

other.gameObject.GetComponent<ConstantRotate>(); // instead of this
gameObject.GetComponent<ConstantRotate>();// try this
3

OMG!! That worked!! Thank you so much. I really appreciate your help. :slight_smile: thanks again!

1 Like
4

Ok so I’m trying to us pretty much the same script to call on a different script for another object. the code looks like this:

using UnityEngine;
using System.Collections;

public class coastertrigger : MonoBehaviour {

void OnTriggerEnter(Collider other)
{
if(other.gameObject.tag==“Player”)
{
splineMove splineMove=gameObject.GetComponent();

splineMove.enabled=true;
}
}

void OnTriggerExit(Collider other)
{
if(other.gameObject.tag==“Player”)
{
splineMove splineMove=gameObject.GetComponent();
splineMove.enabled=false;
}
}

}

but it keeps telling me:

Assets/coastertrigger.cs(20,25): error CS0246: The type or namespace name `splineMove’ could not be found. Are you missing a using directive or an assembly reference?

Any idea why it’s not working for calling on this script? What am I doing wrong?

5

I get compiler errors with any other script is called on but “ConstantRotate” can anyone help please me figure out why it wont work with other scripts?