Having Problem with 2D Unity

Questions & Answers
1

Hi Everyone, when i add this following script, i got an error message like this :

Assets/Script/BirdController.cs(17,37): error CS0120: An object reference is required to access non-static member `UnityEngine.Rigidbody2D.velocity’

Any help would be appreciated. Thank You.
Below are my scripts :

using UnityEngine;
using System.Collections;

public class BirdController : MonoBehaviour {

	public Vector2 jumpForce = new Vector2 (0,200);

	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
		//loncat
		if(Input.GetMouseButtonDown(0)){
			Rigidbody2D.velocity = Vector2.zero;
			Rigidbody2D.AddForce(jumpForce);
		}
	}
}
2

The issue you’re having on lines 17 and 18 is that you’re using a Type when you should be using the property.

Rigidbody2D = Type

rigidbody2D = Property derived from MonoBehaviour and it’s stack.

Also the assumption is this script is attached to a GameObject that actually has a Rigidbody2D component on it.

You change the case on the two lines to fix it. Scripting is case sensitive.

3

Rigidbody2D.velocity = Vector2.zero;
Rigidbody2D.AddForce(jumpForce);

This method used to be ok but has since changed. You now must reference the Rigidbody2D object before you use it.

Try using something like this:

private Rigidbody2D rb2d;

void Start()
{
    rb2d = GetComponent<Rigidbody2D>();
}

void FixedUpdate()
{
    if (Input.GetButtonDown('Jump'))
    {
        rb2d.velocity = Vector2.zero;
        rb2d.AddForce(jumpForce);
    }
}