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Question by Pablethe · Aug 28, 2017 at 12:30 AM · raycastvelocityrayinput.mouseposition

Directional Shot (!)

Hello !! I need help. I need to do in my game that the shot go where I touch on the screen of my cell phone. I searched everywhere, but I can not do it. With Ray?? :/

My Script Shot:

     public void shootingFunction(){
         if(Input.GetMouseButtonDown(0) && Time.time > nextFire && isDead == false)
         {
             MyPlayOneShot (lanzaShuriken);
             anim.SetTrigger ("LanzaShuriken");
             nextFire = Time.time + fireRate;
             Instantiate(shot, shotSpawn.position, shotSpawn.rotation);
         }
     }

This script call 'shot', gameObject with the next Script:

     public float speed;
     public Rigidbody2D bullet;
 
     void OnEnable()
     {
         bullet.velocity = transform.up * speed;
     }


I tried to do a Ray method. But I did not know how to call it from my other Script 'shot'.

THANK YOUUUUUU

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Answer by misher · Aug 28, 2017 at 10:20 AM

On mobile you should use Input Touch instead of GetMouseDown. Then use Camera.ScreenPointToRay passing touch position as an argument. Here is a simple example:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
     public class TapBullet : MonoBehaviour {
     
         [Range(0.5f, 50f)]
         public float bulletSpeed = 5f;
     
         // Update is called once per frame
         void Update () {
     #if UNITY_EDITOR
             if (Input.GetMouseButtonDown(0))
             {
                 Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
                 CreateBullet(ray);
             }
     
     
     #elif UNITY_ANDROID || UNITY_IOS
                 // if there is at least one touch detected this frame in its begin phase
                 if(Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began)
                 {
                     Ray ray = Camera.main.ScreenPointToRay(Input.GetTouch(0).position);
                     CreateBullet(ray);
                 }
     #endif
         }
     
         // on tap handler
         private void CreateBullet(Ray ray)
         {
             //create sphere primitive
             GameObject bullet = GameObject.CreatePrimitive(PrimitiveType.Sphere);
             // set scale to 0.2m
             bullet.transform.localScale = Vector3.one / 5f;
             // set initial position to ray origin
             bullet.transform.position = ray.origin;
             // add rigidbody to the bullet gameobject
             Rigidbody rb = bullet.AddComponent<Rigidbody>();
             // disable gravity for bullet
             rb.useGravity = false;
             // set velocity vector same as ray direction
             rb.velocity = ray.direction * bulletSpeed;
             // destroy bullet after 5 seconds
             Destroy(bullet, 5f);
         }
     }
 

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