Slowdown while moving with rigidBody2D movement

Hello! This is my first post on the forum so sorry if this is in the wrong place. ^)^ I've been having some trouble with rigidbody2d movement where the player slows down sometimes while moving. I have a very basic movement script, so this is probably an easy thing to fix. I'm not sure but it may be lag, but I really doubt that. So here's the movement script for my player

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class PlayerMovement : MonoBehaviour {
5.    
6.     public float speed;
7.  
8.     void Update () {
9.  
10.         //Movement from Keyboard Input
11.         if (Input.GetKey (KeyCode.D)) {
12.             rigidbody2D.AddForce(Vector2.right * speed);
13.                 }
14.         if (Input.GetKey (KeyCode.W)) {
15.             rigidbody2D.AddForce(Vector2.up * speed);
16.         }
17.         if (Input.GetKey (KeyCode.S)) {
18.             rigidbody2D.AddForce(-Vector2.up * speed);
19.         }
20.         if (Input.GetKey (KeyCode.A)) {
21.             rigidbody2D.AddForce(-Vector2.right * speed);
22.         }
23.  
24.     }
25. }
26.  

His speed variable is set to 4.5 right now.
Here's a screenshot of his rigidbody properties also,

Spoiler: Screenshots

Also his sprite properties (it has a 64x64 pixel sprite)

Thanks in advance! ^ -^

 

try rigidbody2D.velocity

and set Rigidbody2D Interpolate to interpolate, for more smooth move.

 

Alright I'll try that, thanks!

 

and i think using GetAxis is more easy. Like:

float moveX = Input.GetAxis("Horizontal");
rigidbody2D.velocity = new Vector2(moveX * speed, rigidbody2D.velocity.y);
float moveY = Input.GetAxis("Vertical");
rigidbody2D.velocity = new Vector2(rigidbody2D.velocity.x, moveY * speed);

you can adjust axis in project setings - input

for physic changes is better to use FixedUpdate instead Update.

 

right now i decided to replace the rigidbody2d.addforce with rigidbody2d.velocity =, but i'll go ahead and try that ^)^

 

i have changed script, it was one error there

 

I fixed it and now it works perfectly! Thank you so much!

[Fixed Script]

Code (CSharp):

1.  void FixedUpdate()
2.     {
3.  
4.         float moveX = Input.GetAxis("Horizontal");
5.         rigidbody2D.velocity = new Vector2(rigidbody2D.velocity.x, moveX * speed);
6.         float moveY = Input.GetAxis("Vertical");
7.         rigidbody2D.velocity = new Vector2(rigidbody2D.velocity.y, moveY * speed);
8.         }
9.     }
10.  

 

good