Resolved Use Variables from another script

I would like to use a variable HP (HitPoints) from another script but the name of the script is defined by the gameObject that the second raycast touched plus “Attributes”. After acquiring the variable I need to subtract the amount of damage taken from the spell.


Notes

• First Raycast finds what is effected by the spell and filters out gameobjects that are not damage receivers (Line 8)
  
  
• Second Raycast is used to see if there is a object blocking the sphere (Ex: A wall is in between player and spell) (Line 68)
  
  
• ScriptNameStr creates name of the script (Line 80)
  
  
• ScriptName Is the name of the script class (Line 92)
  
  
• Hp Is Hit Point variable (Line 92)

Current error occurs when subtracting damage from hp (On underlined parts)

ScriptName.HP = ScriptName.HP - DamageCal(Level);

Error is





Same Error just zoomed in


Current code:

Outside Function

Code (CSharp):

1.     // Names Of Objects it hit
2.     string[] HitNames = new string[1000];

Function has these parameters

Code (CSharp):

1. Vector3 center, float radius, int Level

Inside Function

Code (CSharp):

1.         // Hit Counter
2.  
3.         int Hitcounter = 0;
4.  
5.  
6.         // Objects
7.  
8.         Collider[] hitColliders = Physics.OverlapSphere(center, radius);
9.  
10.         foreach (var hitCollider in hitColliders)
11.  
12.         {
13.  
14.             // Check if the gameObject has the tag DamageReceiver
15.  
16.             if (hitCollider.gameObject.CompareTag("DamageReceiver"))
17.  
18.             {
19.  
20.                 // Get Name
21.  
22.                 HitNames[Hitcounter] = hitCollider.gameObject.name;
23.  
24.  
25.  
26.                 // Increase Hit Counter
27.  
28.                 Hitcounter++;
29.  
30.             }
31.  
32.         }
33.  
34.  
35.  
36.         // Set Counter
37.  
38.         int Counter = 0;
39.  
40.  
41.  
42.         // Raycast
43.  
44.         foreach (var Name in HitNames)
45.  
46.         {
47.  
48.             // Find Game Object Position
49.  
50.             Vector3 objectPosition = GameObject.Find(Name).transform.position;
51.  
52.  
53.  
54.             // Find Direction
55.  
56.             Vector3 Direction = (objectPosition - center);
57.  
58.  
59.  
60.             // Collider
61.  
62.             RaycastHit RayCastCollider;
63.  
64.  
65.  
66.             // Raycast
67.  
68.             bool RayCast = Physics.Raycast(center, Direction, out RayCastCollider, 30);
69.  
70.  
71.  
72.             // Compare Name to expected name
73.  
74.             if (RayCastCollider.collider.gameObject.name == Name)
75.  
76.             {
77.  
78.                 // Script name as string
79.  
80.                 string ScriptNameStr = RayCastCollider.collider.gameObject.name + "Attributes";
81.  
82.  
83.  
84.                 // Component
85.  
86.                 Component ScriptName = RayCastCollider.collider.gameObject.GetComponent(ScriptNameStr);
87.  
88.              
89.  
90.                 // Damage
91.  
92.                 ScriptName.HP = ScriptName.HP - DamageCal(Level);
93.  
94.             }
95.  
96.          
97.  
98.             // Increase Counter
99.  
100.             Counter++;
101.  
102.         }
103.  

 

You can’t arbitrarily ask for “HP” from a variable of type Component, since that type doesn’t define such a property or field. You need to access the member from an appropriately typed expression. For example, if HP were defined on a custom component named DataComponent, you would want to make sure that you cast the variable to that type before accessing:

Code (csharp):

1. if (obj.GetComponent(…) is not DataComponent dataComponent
2.     || dataComponent == null)
3. {
4.   // component was null or not a DataComponent
5.   throw new Exception();
6. }
7. var hp = dataComponent.HP;

If you didn’t specify the field or property in a common base class, you can use an interface to allow types from different type hierarchies to implement members that you can access by casting them to the interface type.

Code (csharp):

1. interface ILivingObject
2. {
3.   float HP { get; }
4. }
5.  
6. class DataComponent : MonoBehaviour, ILivingObject
7. {
8.   // serialized field
9.   public float hp;
10.  
11.   // ILivingObject implementation
12.   public float HP => hp;
13. }

 

Thank you for the help I fixed it.