Unity 2D char vibrating when touching another object

Questions & Answers
1

Hey i am having a trouble with my character.
Every time it touches another object with a collider on it it starts vibrating like crazy and sometimes even fall on his back.
How do i fix this ?
Here’s the code:

using UnityEngine;
using System.Collections;

public class PlayerControl : MonoBehaviour
{
bool grounded, interact; //bool for checking if player is grounded so they can jump, and bool for interact, so that player can only interact when in range of thing to interact with
public Transform JumpCheck, GroundCheck; //transform variable for the end points of the linecasts

RaycastHit2D interacted; //a variable type that stores a collider that was hit during linecast

public float speed = 6.0f;

float jumpTime, jumpDelay = .3f;
bool jumped;

Animator anim;

void Start()
{
	anim = GetComponent<Animator>();
}

void Update()
{
	Movement(); //call the function every frame
	RaycastStuff(); //call the function every frame
}

void RaycastStuff()
{
	//Just a debug visual representation of the Linecast, can only see this in scene view! Doesn't actually do anything!
	Debug.DrawLine(transform.position, JumpCheck.position, Color.magenta);
	Debug.DrawLine(transform.position, GroundCheck.position, Color.magenta);

	//we assign the bool 'ground' with a linecast, that returns true or false when the end of line 'jumpCheck' touches the ground
	grounded = Physics2D.Linecast (transform.position, GroundCheck.position, 1 << LayerMask.NameToLayer ("Ground"));
}

void Movement() //function that stores all the movement
{
	if (Input.GetKey("left ctrl")) {
		anim.SetBool("IsAttacking",true);
	}
	else
	{
		anim.SetBool("IsAttacking",false);
	}
	if (Input.GetKey ("right") || Input.GetKey ("left")) {
		anim.SetBool ("IsRunning", true);
	} else {
		anim.SetBool ("IsRunning", false);
	}

	if(Input.GetAxisRaw("Horizontal") > 0)
	{
		transform.Translate(Vector3.right * speed * Time.deltaTime); 
		transform.eulerAngles = new Vector2(0, 0); //this sets the rotation of the gameobject
	}

	if(Input.GetAxisRaw("Horizontal") < 0)
	{
		transform.Translate(Vector3.right * speed * Time.deltaTime);
		transform.eulerAngles = new Vector2(0, 180); //this sets the rotation of the gameobject
	}

	if(Input.GetKeyDown (KeyCode.Space) && grounded) // If the jump button is pressed and the player is grounded then the player jumps 
	{
		GetComponent<Rigidbody2D>().AddForce(transform.up * 300f);
		jumpTime = jumpDelay;
		anim.SetTrigger("Jump");
		jumped = true;
	}

	jumpTime -= Time.deltaTime;
	if(jumpTime <= 0 && grounded && jumped)
	{
		anim.SetTrigger("Land");
		jumped = false;
	}

}

}

2

Cant run the code where I am. But I imagine you are seeing objects do this:

move towards.
collide.
bounce back slightly.
move towards.
collide.
bounce back slightly.

-repeat-

I see this a lot because collsion logic doesn’t handle ‘near other objects’ very well.

3

This is happening because you are using transform.Translate to blindly move your player object, it teleports you around (by small distances) and avoids physics. Everytime the collision pushes away the colliding objects, you just translate back into the collision and so on = vibration.

I see you already use RigidBody2D for jumping, now use it for all movement of the object. For example (and don’t forget to set up the rigidBody property in the Start() method):

if(Input.GetAxisRaw("Horizontal") > 0) {
    // ...
    rigidBody.velocity = Vector2.right * speed;
    // ...
}

This way you will only control the RigidBody2D’s velocity and physics will take care of the rest, eliminating any vibration. Also don’t forget the RigidBody2D has angularVelocity property as well which you can use for the rotation.