2D Character Controller

A simple character control script I wrote, which allows movement, jump, and wall jumping.

var speed : int = 1;

var isGrounded : boolean;

var isWalled : boolean;

var horizontal : float;

var vertical : float;

var directional : boolean;

function Start () {

}

function Update () {

horizontal = Input.GetAxis("Horizontal");

vertical = Input.GetAxis("Vertical");

if (Input.GetKey(KeyCode.RightArrow) || Input.GetKey(KeyCode.LeftArrow) || Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.D))

directional = true;

else

directional = false;

if (isGrounded)

{

if (Input.GetKeyDown(KeyCode.Space))

{

rigidbody.AddForce(Vector3.up * 5, ForceMode.Impulse);

}

if (Input.GetAxis("Horizontal"))

{

rigidbody.AddForce(Vector3(horizontal * (speed * 2), 0, 0), ForceMode.Acceleration);

}

}

if (isWalled)

{

rigidbody.drag = 6;

if (Input.GetAxis("Horizontal") && Input.GetKeyDown(KeyCode.Space))

{

rigidbody.AddForce(Vector3(horizontal * (speed * 10), 5, 0), ForceMode.Impulse);

}

if (Input.GetKeyDown(KeyCode.Space) && !directional)

{

isWalled = false;

}

}

if (!isWalled)

{

rigidbody.drag = 1;

}

}

function OnCollisionEnter (Col : Collision) {

if (Col.gameObject.tag == "Floor")

{

isGrounded = true;

isWalled = false;

}

if (Col.gameObject.tag == "Wall")

{

isWalled = true;

horizontal = 0;

}

}

function OnCollisionExit (Col : Collision) {

if (Col.gameObject.tag == "Floor")

isGrounded = false;

if (Col.gameObject.tag == "Wall")

isWalled = false;

}

The above script allows the arrow keys, as well as spacebar, to control a character on the X axis, and jump using the Y axis. When used with the following camera script, it can be used to control a 2D platformer character with no additional code.

//The target is the character you want to follow. 

var target : Transform;

function Start () {

}

function Update () {

gameObject.transform.position.x = target.transform.position.x;
gameObject.transform.position.y = target.transform.position.y;
}