C# Changing the radius of the sphere collider

Questions & Answers
1

Hello, I am new to Unity and I was wondering if anybody could help me.
My problem is that i have no idea how to change the radius of the sphere collider in C#. If anybody could help it would be much appreciated.

2 
SphereCollider myCollider = transform.GetComponent<SphereCollider>();
myCollider.radius = 10f; // or whatever radius you want.

further reading:

http://unity3d.com/support/documentation/ScriptReference/SphereCollider-radius.html

3

You must typecast the collider to SphereCollider, like below:

  (collider as SphereCollider).radius = 5;

The same applies to the other types (BoxCollider, CapsuleCollider etc.).

5

SphereCollider SP = gameObject.GetComponent();
SP.radius = 3.0f;

It works in my case.

4

This is perfect for explosions that affect other objects around it, like to create a “blast zone”. Check out a little demo, made with the script below: Bomb Test Web Player Demo Press F5 to see it explode over and over.

using UnityEngine;
using System.Collections;

public class Bomb : MonoBehaviour
{

    private SphereCollider myCollider;
    public Transform particles;
    private float time = 2;

	void Start () {
        myCollider = transform.GetComponent<SphereCollider>();
	}
	
	void Update ()
	{

	    if (Time.time >= time)
	    {
            
            if (myCollider.radius < 50)
	        {
                Instantiate(particles, transform.position, transform.rotation);
                myCollider.radius += 2f;
	            
	        }
	        else
	        {
	            myCollider.enabled = false;
	        }
	    }

	}
}