Class Variables: Variables With Multiple Sub-Variables in Unity

In Unity creating variables is simple:

public int someValue = 1;

The variable above will be shown like this in the Inspector view:

But what if you want to have multiple sub-variables in one single variable? That's easy to achieve with the Class Variables.

Class Variables are variables that use another class as a base type, giving the ability to have multiple sub-variables in one group.

It is done by using a class with the [System.Serializable] attribute.

Check the code below:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class SC_ClassVariables : MonoBehaviour
{
    [System.Serializable]
    public class VariableGroup
    {
        public Transform t;
        public int someValue = 1;
        public bool someBool = false;
    }

    public VariableGroup variableGroup;
}

• The script above defines a class called VariableGroup
• The class VariableGroup contains multiple sub-variables
• Note the [System.Serializable] before the class. This attribute is needed to be able to edit its variables in the inspector view.
• And lastly, the variable variableGroup is defined, which uses the VariableGroup class.

The class values are accessed by calling the variable name followed by a dot and then the child variable name:

variableGroup.t
variableGroup.someValue
variableGroup.someBool

The class above can also be used in an array:

public VariableGroup[] variableGroup;