Question Simple Slider issue?

Type mismatch error when adding slider component in inspector?

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3.  
4. public class ShotPower : MonoBehaviour
5. {
6.     public float Force;
7.     public Slider forceUI;

Following a simple tutorial and failing.

Thought maybe update change since tutorial but only 1 year old.
Tried using elements but that doesn't show field in inspector.

Created UI Slider in hierarchy, it created a game object with slider component.
Am I using correct UnityEngine.UI or is there another system to cover this component?

 

I think you do want that one, yes...

Did you make your OWN class called Slider?

 

Do you want a reference in Inspector where you can drag a Slider component onto? Or do you want the Force value to be editable as a slider?

In the latter case you only need to prepend it with the Range attribute:

[Range(0f, 1f)] public float Force;

 

Make sure there aren’t any other compile errors. You have to fix those first if that is the case.
Check the console.
Make sure you’re doing everything the same as in the tutorial. You can’t make any typo’s

 

thanks for responses. The issue was trying to attach it to a prefab. In tutorial they were adding to a ball in hierarch. I was trying to add a shot strength meter to a ball prefab. Unity is one fickle beast. No issue dragging and dropping TMPs or other things on prefabs, but the slider must be done with prefab unpacked it would seem. Works now. Thanks.

 

No, but unity did flag as ambiguous, and showed solutions, which is how I knew about elements. Thanks, issue was dragging on a prefab that wasn't unpacked.

 

Not sure what I really wanted, which is part of the problem ;-) never used slider before, but it did the trick. I wanted to be able to edit shot strength in inspector, click button, have a smooth shot strength meter. Works very good, after tweaking some settings between increments. and min max settings on slider, got it to slide nice.
This is for a pinball game.
I ended up with max force 12, increment 8, slider was set to 0 to 10.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UI;
5.  
6. public class ShotPower : MonoBehaviour
7. {
8.     public float maxForce = 10.0f; // Maximum force that can be applied
9.     public float forceIncrement = 1.0f; // Incremental force increase per second
10.  
11.     private float currentForce = 0.0f;
12.     private bool isIncreasingForce = false;
13.  
14.     public Slider forceUI;
15.  
16.     // Update is called once per frame
17.     void Update()
18.     {
19.         if (Input.GetKeyDown(KeyCode.UpArrow))
20.         {
21.             isIncreasingForce = true;
22.         }
23.  
24.         if (Input.GetKeyUp(KeyCode.UpArrow))
25.         {
26.             isIncreasingForce = false;
27.             shoot();
28.             StartCoroutine(Wait());
29.         }
30.  
31.         if (isIncreasingForce)
32.         {
33.             IncreaseForce();
34.             slider();
35.         }
36.     }
37.  
38.     void IncreaseForce()
39.     {
40.         currentForce += forceIncrement * Time.deltaTime;
41.         currentForce = Mathf.Clamp(currentForce, 0, maxForce);
42.     }
43.  
44.     void shoot()
45.     {
46.         // Calculate the direction based on the Z-axis (forward)
47.         Vector3 shootDirection = transform.forward;
48.  
49.         // Apply force in the forward direction
50.         GetComponent<Rigidbody>().AddForce(shootDirection * currentForce, ForceMode.Impulse);
51.         currentForce = 0; // Reset the force after shooting
52.     }
53.  
54.     public void slider()
55.     {
56.         forceUI.value = currentForce;
57.     }
58.  
59.     IEnumerator Wait()
60.     {
61.         yield return new WaitForSeconds(1.5f);
62.         slider(); // Update the slider after the wait period
63.     }
64. }
65.  

 

Pinball... neat!!

You might want to use an

AnimationCurve

, basically an analog lookup table, to control strength of shot based on how far the plunger is withdrawn.