How getting transform of another GameObject C#?

Questions & Answers
1

I want that, if a sphere collide with a plane, a cube start to fall.

This is the plane script but doesn’t work:

public float speed = 1;

 void OnTriggerEnter(Collider other){
 if(other.gameObject.name == "Sphere"){
  move the cube with transform.translate
 
 }
 }

I know that i have to use GetComponent but I don’t know how.

Plese, someone help me ^^

2

I would say it would be easiest if you had two scripts. One script for the plane and one script for the cube.

PlaneScript:

using UnityEngine;
using System.Collections;

public class PlaneScript : MonoBehaviour {
	
	public GameObject Cube;
	private CubeScript cubeScript;
	
	public void Start()
	{
		cubeScript = (CubeScript) Cube.GetComponent(typeof(CubeScript));
	}
	
	public void OnTriggerEnter(Collider other){
		if(other.gameObject.name == "Sphere")
		{
			cubeScript.Fall();
		}
	}
}

CubeScript:

using UnityEngine;
using System.Collections;

public class CubeScript : MonoBehaviour {

	private bool IsFalling = false;
	public float speed = 1;
	
	// Update is called once per frame
	void Update () {
		if(IsFalling)
		{
			transform.Translate(0,-speed * Time.deltaTime,0);
		}
	}
	
	public void Fall()
	{
		IsFalling = true;
	}
}

Remember OnTriggerEnter is only called if you have checked the “IsTrigger” on the planes collider, and the plane does not trigger if the Sphere is hitting the plane from behind.