Custom inspector - damage formula

Hello,

Im creating a project in unity but as I prototype the abilities I ran into the issue that I would like to calculate the damage of a certain ability using dice notations and other parameters like the player stats for example.
As of now I have to do it in code, but I would like to set this kind of thing in the inspector.
Can I get some suggestions or references of how should I approach this?

Thank you.

 

I'm not sure all the functionality you'd want to include here, but here's an example of how you might approach this. There are two files: A ScritableObject, and a custom Inspector for it. After you add the classes, the "Create" menu in Unity will contain a menu for "MyGame -> PlayerStats". (The Create menu is either in the Project window, or you can find it by right-clicking in a project directory). This will create a PlayerStats asset you can pass into other scripts.

The PlayerStats script is simple:

Code (CSharp):

1. using UnityEngine;
2.  
3. [CreateAssetMenu(menuName = "MyGame/Player Stats")]
4. public class PlayerStats : ScriptableObject
5. {
6.     [Range(3, 25)]
7.     public int Strength;
8.     [Range(3, 25)]
9.     public int Stamina;
10.     [Range(3, 25)]
11.     public int Intelligence;
12. }
13.  

The PlayerStatsEditor is a little messier, but it does kind of what you seem to want to do. There's a button to randomize the stats. This "rolls" N-sided dice M times, and assigns the values back to the PlayerStats object.

Code (CSharp):

1. using UnityEditor;
2. using UnityEngine;
3.  
4. [CustomEditor(typeof(PlayerStats), true)]
5. public class PlayerStatsEditor : UnityEditor.Editor
6. {
7.     private int numberOfDice;
8.     private int numberOfSides;
9.     public override void OnInspectorGUI()
10.     {
11.         DrawDefaultInspector();
12.  
13.         Rect position = GUILayoutUtility.GetLastRect();
14.         position = new Rect(position.x, position.y + 30, position.width, position.height);
15.         numberOfDice = EditorGUI.IntSlider(position, new GUIContent("Number of Dice"), numberOfDice, 1, 5);
16.  
17.         position = new Rect(position.x, position.y + 30, position.width, position.height);
18.         var sideLabels = new GUIContent[] { new GUIContent("4"), new GUIContent("6"), new GUIContent("8"), new GUIContent("10"), new GUIContent("12") };
19.         var sideOptions = new int[] { 4, 6, 8, 10, 12 };
20.         numberOfSides = EditorGUI.IntPopup(position, new GUIContent("Number of Sides"), numberOfSides, sideLabels, sideOptions);
21.  
22.         GUILayout.Space(80);
23.  
24.         if (GUILayout.Button("Randomize Stats"))
25.         {
26.          
27.  
28.             ((PlayerStats)serializedObject.targetObject).Strength = RandomStat(numberOfDice, numberOfSides);
29.             ((PlayerStats)serializedObject.targetObject).Stamina = RandomStat(numberOfDice, numberOfSides);
30.             ((PlayerStats)serializedObject.targetObject).Intelligence = RandomStat(numberOfDice, numberOfSides);
31.  
32.             EditorUtility.SetDirty(((PlayerStats)serializedObject.targetObject));
33.         }
34.  
35.  
36.     }
37.  
38.     private int RandomStat(int numberOfDice, int dieSides)
39.     {
40.         Debug.Log(string.Format("Rolling {0} {1}-sided dice", numberOfDice, dieSides));
41.         int sum = 0;
42.         for (var i = 0; i < numberOfDice; i++)
43.         {
44.             sum += UnityEngine.Random.Range(0, dieSides);
45.         }
46.         return sum;
47.     }
48. }
49.  

Maybe that's a place to start. You could make the Editor more complex, assigning buttons for each stat individually.

 

Thank you @dgoyette, but in the case you mentioned the damage is calculated totally randomized.
What if I wanted for example to have the player spell damage to be calculated by:

((1d10+15+self.int/10)*self.firePower/target.resistance_fire)

Any ideas on how to implement something like it?

 

What you're asking for requires interpretation. You can create a custom language and parse it with your own implementation of an interpreter, or you might be able to use a LUA script parser.

For LUA, there are plenty of examples online and I believe the asset store has at least one free one.

Either way, the field in the editor needs to be a string. Then you feed that string into an interpreter to create code which can calculate the given formula.