My player sprite get stuck to walls while moving along

Questions & Answers
1

Hello,

I am trying to achieve basics 2D movement in a top-down game with Unity built-in Physics. I didn’t write any physics code.

playerMovement

My player sprite is moving along the wall (not even diagonal, just straight down) and get randomly blocked in the corner of some walls. By blocked, I mean that the Y movement is stopped. If I move him away from the wall, he might not be blocked again by the same wall and get blocked at some other walls, always at a corner.

The walls are all the same sprite and are of the same size.

I use 2D Box Colliders for the walls. The player sprite has a Box Collider 2D and a RigidBody 2D.

I move the player by adjusting the velocity of the rigidbody according to Input:

RigidBody2D rb = GetComponent<Rigidbody2D>();
float horizontal = Input.GetAxisRaw ("Horizontal");
float vertical = Input.GetAxisRaw("Vertical");
Vector2 movement = new Vector2(horizontal, vertical).normalized *speed * Time.deltaTime;
this.rb.velocity = movement;

The player is set like this:

player

Do you have any idea why it behaves like this and how I could fix it?

Thanks for your help.

2

The way physics works is there’s a little buffer around the actual object, so the corner of your player is hitting the corner of a wall piece. It’s probably random due to update frequency of the physics, sometimes it’s able to pass over the corner.

If you’re able to use a Circle collider on the player, it should fix the problem by letting it slide over the corners.