CameraShaker

using UnityEngine;

public class CameraShaker : MonoBehaviour
{

    Vector3 cameraShake;
    float currentShakeMagnitude = 0f;
    public float shakeReductionSpeed = 1f;
    public float maximumShakeMagnitude = 5f;

    public float shakeScalar = 2f;



    public float maxDistanceForCameraShake = 40f;
    public void AddCameraShake(float magnitude, Vector3 shakePosition)
    {

        float distanceToCamera = Vector3.Distance(shakePosition, transform.position);
        if (distanceToCamera > maxDistanceForCameraShake)
            return;

        float fallOff = 1f - (distanceToCamera / maxDistanceForCameraShake);

        magnitude *= fallOff;

        if (magnitude < maximumShakeMagnitude)
        {
            currentShakeMagnitude = magnitude;
        }
        else
        {
            currentShakeMagnitude = maximumShakeMagnitude;
        }

    }

    void LateUpdate()
    {
        if(currentShakeMagnitude > 0f)
            Shake();
    }

    private void Shake()
    {
        Vector3 startPosition = transform.position - cameraShake;
        if (currentShakeMagnitude > 0f)
        {
            currentShakeMagnitude -= Time.deltaTime * shakeReductionSpeed;
        }
        else currentShakeMagnitude = 0;

        cameraShake = Random.insideUnitSphere * currentShakeMagnitude * shakeScalar;

        transform.position = startPosition + cameraShake;

    }

}