Curving projectiles issue

Questions & Answers
1

Hello. I’m hoping to get a little help with a problem I’m having. Fair warning, I’m a total noob, so dumbed down answers would be appreciated. The problem I’m having is with an enemy unit I’m creating in a platformer style game. The code below is attached to the prefab projectile which is instantiated in the enemy script. When the enemy unit fires a projectile, it starts off going in the correct direction, but when the player unit moves, the bullet curves mid-air according to his movement. I’m having trouble figuring out how to make the bullet fire towards the player, but fly in a straight line regardless of the player’s movements. Code below. Any help will be appreciated. Thanks in advance.

using UnityEngine;
using System.Collections;

using UnityEngine;
using System.Collections;

public class Bullet : MonoBehaviour {

	public float bulletSpeed = 5;
	Vector2 playerPos;
	Vector2 startPos;

	void Start () {
		startPos = transform.position;
	}	

	void Update () {		
		playerPos = GameObject.FindGameObjectWithTag ("Player").transform.position;
		Vector2 bulletDirection = (playerPos - startPos).normalized;
		transform.Translate(bulletDirection * bulletSpeed * Time.deltaTime);
	}
}
2

Your update function is called every frame, and you are getting the players position each time and updating the position your bullet it moving towards.

You could calculate the bullet direction once during Start() and then use it in Update()

    Vector2 bulletDirection;

     void Start () {
         startPos = transform.position;
         playerPos = GameObject.FindGameObjectWithTag ("Player").transform.position;
         bulletDirection = (playerPos - startPos).normalized;
     }    
 
     void Update () {        
         transform.Translate(bulletDirection * bulletSpeed * Time.deltaTime);
     }