Question My player does not fall when going into the side of a platform

Hi, im trying to create a 2d platformer game. Heres the code:

Code (CSharp):

1. using UnityEngine;
2.  
3. public class playerMovement : MonoBehaviour
4. {
5.     public float playerSpeed = 5.0f;
6.     private static float jumpPower = 5.0f;
7.     public LayerMask layerMask;
8.     public Transform groundCheck;
9.  
10.     public Rigidbody2D rb2d;
11.  
12.     private void Start() => rb2d = GetComponent<Rigidbody2D>();
13.  
14.     private void Update()
15.     {
16.         float xInput = Input.GetAxisRaw("Horizontal");
17.         rb2d.velocity = new Vector2(xInput * playerSpeed, rb2d.velocity.y);
18.  
19.         switch (xInput)
20.         {
21.             case 1:
22.                 transform.localRotation = Quaternion.Euler(0f, 0f, 0f);
23.                 break;
24.             case -1:
25.                 transform.localRotation = Quaternion.Euler(0f, -180f, 0f);
26.                 break;
27.         }
28.  
29.         var isGrounded = Physics2D.Raycast(groundCheck.position, Vector2.down, 0.1f, layerMask);
30.         if (Input.GetButtonDown("Jump") && isGrounded)
31.         {
32.             rb2d.velocity = new Vector2(rb2d.velocity.x, jumpPower);
33.         }
34.  
35.         if (Input.GetKeyDown(KeyCode.R))
36.         {
37.             transform.position = new Vector3(-7f, -2f);
38.         }
39.     }
40. }

The problem here is as when i fall and walk into the side of a platform the player does not fall and stays there until x axis is released. Can anyone help me? (btw sorry for my bad english)

 

I faced the same problem some months ago and ended implementing movement in 3 possible ways as i can remember:
-Changing the velocity of the rigidbody (as you did)
-Adding force to the rigidbody
-Simply changing the position in the transform

I do NOT recommend you the second option, because you are constantly adding acceleration, wich becomes so hard to control.
As an implementation of the third option, i wrote this code:

Code (CSharp):

1. Vector3 movement = new Vector3(Input.GetAxis("Horizontal"), 0f, 0f);  //Getting the input as an horizontal vector instead of a float value
2. transform.position += movement* Time.deltaTime * speed;  //Add that new vector to the current position

You can try this or maybe creating a physic material with no friction, so instead of getting glued to the wall, it slips down, but this option is much less handy and i dont know if it could give you any problems in the future.

 

Thank you for helping. I can finally understand that now. I knew that changing the velocity wasnt the best option but i couldnt find a better option. Really thanks

 

Thank you for replying and helping me. This solution works but if i go into the side of a wall it gets kinda buggy and the player shakes while falling down. Anyways thanks for the help mate

 

This also counts for modifying the transform. Don't do it when you're using physics. You will move the collider and it will trigger anger and discontent in the physics system.

Instead, if you MEAN to move the collider, use .MoveRotation() , or ideally just move a child object that contains the visual portions of what you want, and does NOT contain the colliders.

 

Thank you. I know this will sound dumb, but what could be the solution for this problem?

 

Let me repeat MelvMay:

That's it. That's the solution.

At a minimum you are violating this fundamental tenet on lines 22, 25 and 37. Fix that problem first (see above!) and then see where you stand.

I'll add my own standard blurb:

With Physics (or Physics2D), never manipulate the transform directly: if you do that, you are bypassing the physics system.

Always use the .MovePosition() and .MoveRotation() methods on the Rigidbody (or Rigidbody2D) to move things.

https://forum.unity.com/threads/col...-unity-physic-rigidbody.1216875/#post-7763061

With a wheel collider, use the motor or brake torque to effect motion.