How can I init a class with string array?

Question

I have this script that get the properties by names from a shader : At the bottom I'm changing one of the properties values by giving the property name: "Vector1_570450D5"

using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;
using UnityEngine.PlayerLoop;

public class ChangeShaders : MonoBehaviour
{
    public Material material;
    public float duration = 1;

    private List<string> propertiesNames = new List<string>();

    private void Awake()
    {
        material = GetComponent<Renderer>().material;

        var propertiesCount = ShaderUtil.GetPropertyCount(material.shader);

        for(int i = 0; i < propertiesCount; i++)
        {
            propertiesNames.Add(ShaderUtil.GetPropertyName(material.shader, i));
        }    
    }

    void Update()
    {
        var currentValue = Mathf.Lerp(-1, 1, Mathf.PingPong(Time.time / duration, 1));
        material.SetFloat("Vector1_570450D5", currentValue);
    }
}

but instead typing manual the property name I want to create a class for each property name so I will be able to type inside the SetFloat something like :

material.SetFloat(myProperties.Vector1_570450D5, currentValue);

In this case there are 5 properties so I want to be able to do :

material.SetFloat(myProperties.Vector1_570450D5, currentValue);

Or

material.SetFloat(myProperties.Color_50147CDB, currentValue);

So I thought to make this script with the attribute executeallways to create a editor script only for getting the properties and then to use the properties in this mono script like in the examples I gave.

derHugo · Accepted Answer · 2020-06-14 16:29:29Z

1

Just to your title: You have a List<string>, not an array ;)

Before filling it with values you would need to initialize it. You can also do that together with the field declaration:

public List<string> names = new List<string>();

Even simpler would then be a proper constructor and e.g. using

public class MyClass
{
    public List<string> names = new List<string>();

    public MyClass(List<string> initialNames)
    {
        // This creates a new List<string> copying all elements of initialNames
        names = new List<string>(initialNames);
    }
}

And then use it like

var myClass = new MyClass(names);

If I understand correct you are further looking for a property like e.g.

public string this[int index] => names[i];

which would allow you to access a specific entry directly via

myClass[i];

instead of

myClass.names[i];

edited Jun 14, 2020 at 16:29

answered Jun 14, 2020 at 16:11

derHugo

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7 Comments

Daniel Lip Over a year ago

This is working fine. If I wanted to make something more complicated for example that I will type myClass.1 or myClass.2 where the number 1 and 2 extracted from the 'i' variable. i.ToString() is the names for example "1" "2" "3" so to create properties of the numbers if I type myClass it will show the numbers as properties like myClass.1 myClass.2 so I can use the numbers later in other scripts as int's or convert them to strings. I don't want to loop over the List myClass.names but to get directly access to the properties.

derHugo Over a year ago

@bendivonim What about using a Dictionary<int, string> then? Or do you mean a property like public int this[int index] => names[i]; so you could use myClass[i] instead of myClass.names[i]; ?

Daniel Lip Over a year ago

The second public int this[int index] => names[i];

Daniel Lip Over a year ago

How do I use this in the for loop in the awake ? public string this[int index] => names[i]; getting errors.

derHugo Over a year ago

Nope this would be a property of MyClass and you wouldn't use it in the loop actually ... Maybe I still didn't fully understand your entire use case / goal :)

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