Projetil rotation in straight line trajectory

Good evening, I would like a help in a script, with a 2D game TopDown, I wish the enemies could throw arrows, straight line, but fowards the player, however, I could not make the arrow sprite spin on its axis Without affecting the straight trajectory. Tips to incorporate?

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Blast : MonoBehaviour {

public float speed;
public GameObject player;
private Rigidbody2D myRigidbody;
private Animator anim;
public Vector3 vDirection;
public float angle;
// Use this for initialization
void Start () {
	myRigidbody = GetComponent<Rigidbody2D>();
	anim = GetComponent<Animator>();
	vDirection = player.transform.position - gameObject.transform.position;
	vDirection = vDirection.normalized;

void Update () {
	player = BlasterAttack.PlayerT;
	myRigidbody.velocity = transform.TransformDirection (vDirection * speed);


Set sprite as a child of arrow Game Object. Move that Game Object and spine the child.

If you are translating and rotating the same object, then its trajectory will change.

  1. Make a parent of the arrow. Do all the translations to this guy.

  2. Now the arrow will follow the translation of its parent. Now perform all your rotations to this guy.