Unity 2D player looks at mouse pointer and when you press w you move toward it

Hey, I have been working on a script where your character can look at the mouse and will rotate with it and when you press w it will move towards it im having a lot of trouble what is the solution. it is for a Top-Down Shooter and this way I won't have to make a script for the gun aiming.

 

Hi,

can you show your script so far? (and what is the problem with it)

 

yes I can. I have school so I can send it later today

 

{
public float speed = 1.5f;
private Rigidbody2D rb;
private Vector3 target;
private Vector2 moveAmount;
void Start()
{
target = transform.position;
rb = GetComponent<Rigidbody2D>();
}
void Update()
{
Vector3 mouseScreen = Input.mousePosition; Vector3 mouse = Camera.main.ScreenToWorldPoint(mouseScreen); transform.rotation = Quaternion.Euler(0, 0, Mathf.Atan2(mouse.y - transform.position.y, mouse.x - transform.position.x) * Mathf.Rad2Deg - 90);
if (Input.GetKeyDown(KeyCode.W))
{
target = Camera.main.ScreenToWorldPoint(Input.mousePosition);
target.z = transform.position.z;
moveAmount = target.normalized * speed;
transform.position = Vector3.MoveTowards(transform.position, target, speed * Time.deltaTime);

}

}
private void FixedUpdate()
{
rb.MovePosition(rb.position + moveAmount * Time.fixedDeltaTime);
}
}

Here is the script the problem is you have to individually press w every time you cant hold it down to move

 

try

Code (CSharp):

1. if (Input.GetKey(KeyCode.W))

 

thanks I will

 

I put in the code and it fixed my problem but now the character won't stop moving what do I do?

 

Code (CSharp):

1. if (Input.GetKeyDown(KeyCode.W))
2. {
3. target = Camera.main.ScreenToWorldPoint(Input.mousePosition);
4. target.z = transform.position.z;
5. moveAmount = target.normalized * speed;
6. transform.position = Vector3.MoveTowards(transform.position, target, speed * Time.deltaTime);
7. }
8.  
9. if (Input.GetKeyUp(KeyCode.W))
10. {
11. moveAmount = Vector2.zero;
12. }
13. {
14.  

still I would use Input.GetAxis for the movement
https://docs.unity3d.com/ScriptReference/Input.GetAxis.html

maybe something is wrong here, just as example

Code (CSharp):

1.  
2. float move;
3. //...
4. move = Input.GetAxis ("Vertical");
5. if (move >= 0)
6. {
7. target = Camera.main.ScreenToWorldPoint(Input.mousePosition);
8. target.z = transform.position.z;
9. moveAmount = target.normalized * speed;
10. transform.position = Vector3.MoveTowards(transform.position, target, speed * Time.deltaTime);
11.  
12. }
13.  
14. }
15. private void FixedUpdate()
16. {
17. rb.MovePosition(rb.position + move * moveAmount * Time.fixedDeltaTime);
18. }
19. }

 

I put in the code but for some reason, it is doing the opposite when I press w and s the character stops and it automatically starts

Code (CSharp):

1. public class playermovement : MonoBehaviour
2. {
3.     public float speed = 1.5f;
4.     private Rigidbody2D rb;
5.     private Vector3 target;
6.     float move;
7.  
8.     private Vector2 moveAmount;
9.  
10.     private void FixedUpdate()
11.     {
12.         rb.MovePosition(rb.position + move * moveAmount * Time.fixedDeltaTime);
13.     }
14.  
15.     void Start()
16.     {
17.         target = transform.position;
18.         rb = GetComponent<Rigidbody2D>();
19.     }
20.  
21.     void Update()
22.     {
23.         Vector3 mouseScreen = Input.mousePosition; Vector3 mouse = Camera.main.ScreenToWorldPoint(mouseScreen); transform.rotation = Quaternion.Euler(0, 0, Mathf.Atan2(mouse.y - transform.position.y, mouse.x - transform.position.x) * Mathf.Rad2Deg - 90);
24.  
25.         move = Input.GetAxis("Vertical");
26.        
27.         if (move >= 0)
28.      
29.         {
30.             target = Camera.main.ScreenToWorldPoint(Input.mousePosition);
31.             target.z = transform.position.z;
32.             moveAmount = target.normalized * speed;
33.             transform.position = Vector3.MoveTowards(transform.position, target, speed * Time.deltaTime);
34.         }
35.  
36.  
37.         else
38.         {
39.             moveAmount = Vector2.zero;
40.         }
41.  
42.         }
43.  
44.  
45.  
46.    
47.  
48.  
49.  
50.    
51.     }
52.  
53.  
54.  
55.  
56.  
57.  

 

sorry I have just copypasted your script, without to look at the other things. There are two different moves in the script.
1.

Code (CSharp):

1. transform.position = Vector3.MoveTowards(transform.position, target, speed * Time.deltaTime);

2.

Code (CSharp):

1. rb.MovePosition(rb.position + move * moveAmount * Time.fixedDeltaTime);

you should disable one of them

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class playermovement : MonoBehaviour
6. {
7.     public float speed = 1.5f;
8.     private Rigidbody2D rb;
9.     private Vector3 target;
10.     float move;
11.  
12.     private Vector2 moveAmount;
13.  
14.     void Start()
15.     {
16.         target = transform.position;
17.         rb = GetComponent<Rigidbody2D>();
18.     }
19.  
20.     void Update()
21.     {
22.         Vector3 mouseScreen = Input.mousePosition; Vector3 mouse = Camera.main.ScreenToWorldPoint(mouseScreen);
23.         transform.rotation = Quaternion.Euler(0, 0, Mathf.Atan2(mouse.y - transform.position.y, mouse.x - transform.position.x) * Mathf.Rad2Deg - 90);
24.  
25.         move = Input.GetAxis("Vertical");
26.  
27.         if (move >= 0)
28.  
29.         {
30.             target = Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;
31.             target.z = transform.position.z;
32.             moveAmount = target.normalized * speed;
33.         }
34.         else
35.         {
36.             moveAmount = Vector2.zero;
37.         }
38.     }
39.  
40.     private void FixedUpdate()
41.     {
42.         rb.MovePosition(rb.position + move * moveAmount * Time.fixedDeltaTime);
43.     }
44. }

 

I would do:
if without physics (W button as example)

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class MoveToMouse : MonoBehaviour
6. {
7.     public float speed;
8.  
9.     private void Update()
10.     {
11.         Rotate();
12.  
13.         if (Input.GetKey(KeyCode.W))
14.         {
15.             Move();
16.         }
17.     }
18.  
19.     void Rotate ()
20.     {
21.         Vector2 directionToMouse = Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;
22.         transform.up = directionToMouse.normalized;
23.     }
24.  
25.     void Move()
26.     {
27.         transform.Translate(transform.up * speed * Time.deltaTime, Space.World);
28.     }
29. }

with rigidbody2D and MovePosition (not sure about it, I have never used moveposition)

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class OtherMoveToMouse : MonoBehaviour
6. {
7.     public float speed;
8.     Rigidbody2D rb;
9.     float move;
10.     Vector2 directionToMouse;
11.  
12.     private void Start()
13.     {
14.         rb = GetComponent<Rigidbody2D>();
15.     }
16.     private void Update()
17.     {
18.         Rotate();
19.         move = Input.GetAxis("Vertical");
20.     }
21.  
22.     private void FixedUpdate()
23.     {
24.         //if the back moving isn't needed
25.         if (move >= 0)
26.         {
27.             rb.MovePosition(rb.position + directionToMouse.normalized * move * speed * Time.fixedDeltaTime);
28.         }
29.     }
30.  
31.     void Rotate()
32.     {
33.         directionToMouse = Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;
34.         transform.up = directionToMouse.normalized;
35.     }
36. }
37.  

with velocity

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class OtherMoveToMouseWithVelocity : MonoBehaviour
6. {
7.     public float speed;
8.     Rigidbody2D rb;
9.     float move;
10.     Vector2 directionToMouse;
11.  
12.     private void Start()
13.     {
14.         rb = GetComponent<Rigidbody2D>();
15.     }
16.     private void Update()
17.     {
18.         Rotate();
19.         move = Input.GetAxis("Vertical");
20.     }
21.  
22.     private void FixedUpdate()
23.     {
24.         //if the back moving isn't needed
25.         if (move >= 0)
26.         {
27.             rb.velocity = (Vector2) directionToMouse.normalized * move * speed;
28.         }
29.     }
30.  
31.     void Rotate()
32.     {
33.         directionToMouse = Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;
34.         transform.up = directionToMouse.normalized;
35.     }
36. }
37.  

Code (CSharp):

1.  transform.up = directionToMouse.normalized;

this line is depended on the sprite look direction (maybe you will use transform.right, -transform.up, -transform.right)