Error CS0120 - Object reference required to access non-static member

Questions & Answers
1

Moved from Unity 4.6 to 5. Previously using JavaScript but now trying C#. Have tried to resolve this using information from answers to similar questions. Gather I need to be using GetComponent() but I cannot get it work.

An Object reference is required to access non-static member ‘UnityEngine.Rigidbody2D.velocity’

I suspect because of this, I am getting a further error:

Error CS0103: The name ‘Destroy’ does not exist in the current context.

This is the script:

using UnityEngine;
using System.Collections;

public class BetaProperties {

	// Allow access to variables in game manager script
	GameManager myGameManager = new GameManager ();

	private int CountCollisions = 0;
	private float ExistTimer = 0.0f;

	void Start () {
		// Launch particle in random direction at a given force
		UnityEngine.Rigidbody2D.velocity = Quaternion.AngleAxis (Random.Range (0, 360), Vector3.forward) * Vector3.up * 2;
	}

		// Start a counter
		void Update () {
			if (ExistTimer >= 0.0) {
				ExistTimer += Time.deltaTime;
			}
		}
		
		void OnCollisionEnter2D (Collision2D col) {
			// If collision is on a wall but less than 5 collisions, increase collision counter
			if ((col.gameObject.tag != "Wall") && (col.gameObject.tag != "Beta") && (CountCollisions < 5)) {
				CountCollisions ++;
			}
			// If collision is on wall with 5 or more collisions OR if colliding with another particle, destroy and add 50 to temperature
			else if (((col.gameObject.tag != "Wall") && (col.gameObject.tag != "Beta") && (CountCollisions >= 5)) || ((col.gameObject.tag == "Beta") && (ExistTimer >= 1))) {
				myGameManager.CurrentTemp = myGameManager.CurrentTemp + 50;
				Destroy(gameObject);
			}

	}

Please help if you can!

2

Your line:

UnityEngine.Rigidbody2D.velocity = Quaternion.AngleAxis (Random.Range (0, 360), Vector3.forward) * Vector3.up * 2;

should be:

GetComponent<Rigidbody2D>().velocity = Quaternion.AngleAxis (Random.Range (0, 360), Vector3.forward) * Vector3.up * 2;

where you get the reference to the Rigidbody2D component instance attached to your gameobject.