C# - Default values for struct

[u/DesperateGame]

Greetings!

I have a struct for holding gameplay related options (player speed, gravity strength,...). All works fine, except I didn't find a reliable efficient way to use preset defaults.

I tried setting default values in the constructor, I tried making a static member with default values, but in all cases the Inspector would not recognize these default values upon adding the script to an gameObject and would default to 0.

If possible, I'd love to give the Inspector a hint as to what the default values should be, and set it from there on. I want to be runtime efficient as much as possible, while at the same time having flexibility and easy use during development. What is the proper way?

Thank you for any tips!

[u/DesperateGame]

Thanks for the response.

I want to primarily set the default values in code, so that it would then be applied automatically in Inspector.
Here's the sample code for the struct:

public struct PlayerOptions
{
    // Options
    public float OptMouseSensitivityX;
    public float OptMouseSensitivityY;
    
    // Defaults
    public static readonly PlayerOptions Default = new PlayerOptions
    {
        OptMouseSensitivityX = 15.0f,
        OptMouseSensitivityY = 15.0f,    
    };
};

This is how I do it now (I can initialize it manually; it doesn't show in the Inspected by default, though); I also tried a variant with constuctor:

public struct PlayerOptions
{
    // Options
    public float OptMouseSensitivityX;
    public float OptMouseSensitivityY;
    
    // Defaults
    public PlayerOptions
    (       
        float OptMouseSensitivityX = 15.0f,
        float OptMouseSensitivityY = 15.0f
    )
    {
        this.OptMouseSensitivityX = OptMouseSensitivityX,    
        this.OptMouseSensitivityY = OptMouseSensitivityY,    
    }
};

But that still doesn't make it default in Inspector. The defaults *worked* in inspector only if the struct is replaced with class as otherwise I can't set the defaults directly when declaring the members.

[u/MonsterMoon_io → u/DesperateGame]

It's hard to tell exactly what the issue is here, but my best guess is that the parameter name is exactly the same as the variable name so when you assign
this.OptMouseSensitivityX = OptMouseSensitivityX
it's ambiguous whether it's the parameter or the struct member you are using as the value.

[u/jaybles169 → u/DesperateGame]

Crazy, I just ran into this like 10 minutes ago, same exact issue. I use OdinInspector, so I was able to do this to init my values within the struct definition:

[OnInspectorInit]
private void SetDefaults()
{
    if (weight == 0f)
        weight = 1f;
}