How do I make the playerObject shake after touching an enemy?

Questions & Answers
1

I am working on a 2d game in unity, and I was wondering how to make the player object shake after contact with an enemy. The shakeFunction works while being called in an Update() function, but not on the collision function.

This is the code that I have:

using UnityEngine;
using System.Collections;
using System.Diagnostics;

public class Shake : MonoBehaviour {

public float shake = 0f;
public float shakeAmount = 0.7f;
public float decreaseFactor = 1.0f;

void OnCollisionEnter2D(Collision2D c)
{

    if (c.collider.tag == "Enemy")
    {
        ShakeFunction();
    }
}
}
void ShakeFunction()
{
    //Stopwatch timer = new Stopwatch();
    //timer.Start();
    Vector2 currentPos = gameObject.transform.localPosition;

    shake = 5.0f;

    //while (timer.Elapsed.TotalSeconds < 3)
    //{

        if (shake > 0)
        {
            gameObject.transform.localPosition = currentPos + Random.insideUnitCircle * shakeAmount;
            shake -= Time.deltaTime * decreaseFactor;

        }
        else
        {
            shake = 0f;
            gameObject.transform.localPosition = currentPos;
        }
    //}
    //timer.Stop();
}

}

2

The main difference is that Update will be called once per frame, but OnCollisionEnter2D will only be called once per collision.

If you want an effect that lasts for several frames, you might want to look up tutorials for Coroutines. You can create a coroutine that is updated once per frame for a little while, and start it once you collide with an enemy or whatever.