double jump script unity
There are a lot of ways to implement the "double jump" feature. The most straight forward would be this one:
public int maxJumps = 2;
private int jumps;
private float jumpForce = 5f;
void Update()
{
if(Input.GetKeyDown(KeyCode.Space) || Input.GetKeyDown(KeyCode.W))
{
this.Jump ();
}
}
private void Jump()
{
if (jumps > 0)
{
gameObject.GetComponent<Rigidbody2D> ().AddForce (new Vector2 (0, jumpForce), ForcMode2D.Impulse);
grounded = false;
jumps = jumps - 1;
}
if (jumps == 0)
{
return;
}
}
void OnCollisionEnter2D(Collision2D collider)
{
if(collider.gameObject.tag == "Ground")
{
jumps = maxJumps;
grounded = true;
movespeed = 2.0F;
}
}
Note that you could have another bool field in order to check if the player has already jumped twice, but using an integer gives you a more flexible solution in case you want to change the game design in the future (ex: letting the user jump three times when using a power-up).
Hope this helps!