2D Physics Movement

Unity Engine
1

Hello everyone

I’m new to Unity 2D system and I have some doubts about making a 2D movement with physics.

Here’s my current code to WASD movement

int Speed = 30;
float maxSpeed = 8f;
// Use this for initialization
void Start () {

}
	
// Update is called once per frame
void FixedUpdate () {
	bool movingX = (Input.GetAxis ("Horizontal") != 0);
	bool movingY = (Input.GetAxis("Vertical") != 0);
	float _xAccel = 0, _yAccel = 0;	
	_xAccel = Input.GetAxis ("Horizontal");			
	_yAccel = Input.GetAxis ("Vertical");

	Vector2 vec = new Vector2 (_xAccel, _yAccel);
	rigidbody2D.AddForce (vec * this.Speed);
	rigidbody2D.velocity = Vector2.ClampMagnitude(rigidbody2D.velocity, maxSpeed);
	float newX = rigidbody2D.velocity.x, newY = rigidbody2D.velocity.y;
	if (!movingX)
		newX *= 0.9f;
	if (!movingY)
		newY *= 0.9f;

	rigidbody2D.velocity = new Vector2 (newX, newY);
}

The code works but the player doesn’t have a smooth movement, It seems like its oscillating.

Is it okay to call AddForce every frame?

Thanks from now
Regards

2

You should do your movement the way it is done in this tutorial project…

3

Thanks Kurius, that was my question.

Will it respect physics from other bodies normally?

What about friction? Should i keep doing it manually or is there another way to acocmplish the effect?

Thank you again.
Regards

4

Yes it will respect physics from other bodies normally.
Regarding friction… create a “Material” and add it to your Collider.

5

thanks, gonna try that