How can i set up a turret that turns and shoots where you touch onscreen?,how to shoot where you touch

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i'm trying to make it where the turret turns and shoots where you touch on the screen, but i'm not really sure how to do it? ,How can i make a turret turn and shoot where you touch on the screen?

Answer 1

Answer by Topthink · Jun 15, 2018 at 09:05 PM

You'll need to use some of the Raycast functions to identify a point where you click on the map. Something like this from one of my programs (you'd need to change it to suit yours).

     private void Update () {
         // on right click...
         if (Input.GetMouseButtonDown(1)) {
             RaycastHit hit;
             // this is an easier way of creating a ray from mouse click
             if (Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), out hit)) {
                 // instead of checking tag, get the script directly
                 UnitSphere unitClicked = hit.collider.GetComponent<UnitSphere>();
                 if (unitClicked != null) {
                     // change selection, wrapped into a function
                     SelectUnit(unitClicked);
                 }
                 // clicked on something else; you might want to check if it is terrain
                 else {
                     // if there is a unit selected...
                     if (selectedUnit != null) {
                         if (Input.GetKey(KeyCode.LeftShift)) {
                             selectedUnit.AddWaypoint(hit.point);
                         }
                         else {
                             selectedUnit.SetWaypoint(hit.point);
                             // unselect as you do in your example; 
                             // however, it would be better to have selection/unselection on a different button!
                             SelectUnit(null);
                         }
                     }
                 }
             }
         }
     }

Take out the select code that will get the hit.point on the map where you click. After that, you would want your turret object to (probably) "Look At" the hit point and fire away with your projectile hitting in or around the hit.point. You'll probably need to look up how to use "Look at" to accomplish what you need to do. Lots of other ways to do it. But I think this is the easiest.

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Topthink · Jun 15, 2018 at 09:07 PM 0

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I was using that for a program that sets waypoints for moving objects. There is a lot of stuff in there that you don't need. Let me know if it's confusing at all and I'll cut out all the junk you don't need.

Topthink · Jun 15, 2018 at 09:15 PM 0

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Something like the following will get you the point where you click on the map. It's probably a little easier to understand than what is above. You will still need the turret to rotate toward the target in some manner.

void Update() { if (Input.GetMouseButtonDown(0)) { RaycastHit hit; Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); if (Physics.Raycast(ray, out hit)) { target = hit.point; transform.position = target; } } }

Topthink · Jun 15, 2018 at 09:21 PM 0

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Here's something from the manual for moving a navmeshagent. Instead of moving to the location, you would have the location be your "target"

     // MoveToClickPoint.cs
     using UnityEngine;
     using UnityEngine.AI;
     
     public class MoveToClickPoint : MonoBehaviour {
         NavMeshAgent agent;
         
         void Start() {
             agent = GetComponent<NavMeshAgent>();
         }
         
         void Update() {
             if (Input.GetMouseButtonDown(0)) {
                 RaycastHit hit;
                 
                 if (Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), out hit, 100)) {
                     agent.destination = hit.point;
                 }
             }
         }
     }

Topthink · Jun 15, 2018 at 09:22 PM 0

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The gist of all these posts is that you'll likely need to use some sort of "raycasting" to mark your spot where the turret shoots.

Answer 2

Answer by miguelrmonreal · Oct 15, 2018 at 02:22 PM

thank you, i will try this.

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How can i set up a turret that turns and shoots where you touch onscreen?,how to shoot where you touch

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