[SCRIPT]Player Movements for Top-Down player

Unity Engine
1

Hi,
I’m posting there a script which isn’t optimized and not working at all, this script needs of a rigidbody2d attached to the gameobject.
The issue I’ve discovered is the following:
when you press first right ( or left ) and then the opposite ( left or right, it depends ) the gameobject has the double velocity that it has at the beginning. Someone Could help me to explain what am I doing wrong?

using UnityEngine;
using System.Collections;

public class PlayerEngineRigidBody : MonoBehaviour 
{
	private float walkSpeed;
	private float runSpeed;
	private float curSpeed;

	private CharacterStat plStat;

	void Start() // because have to take the value of agility and speed
	{
		plStat = GetComponent<CharacterStat>();
		walkSpeed = (float)(plStat.Speed + plStat.Agility);
		runSpeed = walkSpeed + (walkSpeed / 2);
	}

	void Update()
	{
		// penso funzioni, usare debug script per sicurezza... ( possibilità di effetto placebo )
		curSpeed = walkSpeed;
		if (Input.GetAxis ("Sprint") > 0) {
			curSpeed = runSpeed;
		}

		// Brake Sentences
		if (Input.GetAxis ("Left") == 0 || Input.GetAxis ("Right") == 0 )
		{
			rigidbody2D.velocity = Vector3.Lerp(rigidbody2D.velocity, new Vector2(0f, rigidbody2D.velocity.y), 0.15f);
		}
		if (Input.GetAxis ("Up") == 0 || Input.GetAxis ("Down") == 0) 
		{
			rigidbody2D.velocity = Vector3.Lerp(rigidbody2D.velocity, new Vector2(rigidbody2D.velocity.x, 0f), 0.15f);	
		}

		// Move senteces
		if (Input.GetAxis ("Left") < 0) 
		{
								rigidbody2D.AddForceAtPosition (Vector3.right * Input.GetAxis ("Left") * curSpeed, transform.position);
		}
		if (Input.GetAxis ("Right") > 0) 
		{
								rigidbody2D.AddForceAtPosition (Vector3.right * Input.GetAxis ("Right") * curSpeed, transform.position);	
		}
		if (Input.GetAxis ("Down") < 0) 
		{
								rigidbody2D.AddForceAtPosition (Vector3.up * Input.GetAxis ("Down") * curSpeed, transform.position);
		}
		if (Input.GetAxis ("Up") > 0) 
		{
								rigidbody2D.AddForceAtPosition (Vector3.up * Input.GetAxis ("Up") * curSpeed, transform.position);
		}

	}
}
2

I’ve just solved the problem ( more less ), I have some problem with the change direction, Someone Could Help me?

public class PlayerEngineRigidBody : MonoBehaviour 
{
	// Special Ability Variables
	private float sprintSpeed;

	// Normal Movements Variables
	private float walkSpeed;
	private float curSpeed;
	private float maxSpeed;

	private CharacterStat plStat;

	void Start()
	{
		plStat = GetComponent<CharacterStat>();

		walkSpeed = (float)(plStat.Speed + (plStat.Agility/5));
		sprintSpeed = walkSpeed + (walkSpeed / 2);

	}

	void FixedUpdate()
	{
		curSpeed = walkSpeed;
		maxSpeed = curSpeed;

		if (rigidbody2D.velocity.x * Input.GetAxis ("Horizontal") < maxSpeed  rigidbody2D.velocity.y * Input.GetAxis ("Vertical") < maxSpeed) 
		{

			rigidbody2D.velocity = new Vector2(Input.GetAxis("Horizontal")* curSpeed,
			                                   Input.GetAxis("Vertical")* curSpeed);

		}
}