Problem with buttons

Questions & Answers
1

My code doesn´t work when i add _fall and _jump to a button script.

Code:

using UnityEngine;
using System.Collections;

public class PlayerController : PhysicsObject
{
public float upForce;
private bool isDead = false;
public float speed;

private Animator anim;                  
private Rigidbody2D rb2d;              

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

void Update(){
	_jump();
	_fall();
}

public void _jump(){
	if (isDead == false && grounded) 
	{

		anim.SetTrigger("Jump");
		rb2d.velocity = Vector2.zero;
		rb2d.AddForce(new Vector2(0, upForce));
	}
}
public void _fall(){
	if (isDead == false) 
	{
		
		rb2d.velocity = Vector2.zero;
		rb2d.AddForce(new Vector2(0,-speed));
	}

}
void OnCollisionEnter2D(Collision2D other)
{
	if (other.collider.tag == "Ground") {
		rb2d.velocity = Vector2.zero;
		isDead = true;
		GameControl.instance.BirdDied ();
	}
}

}

2

Nothing is happening because you are setting the velocity to zero twice per frame. You should remove those calls and you might get closer to what you are expecting.

For most physics you want to avoid setting the velocity directly. It cancels out all calls to addForce() you made before setting the velocity.