Quest Mod Configuration

Most mods require a configuration to allow users to change the functionality of the mod.

This section will guide you through the basics of using config-utils to create configuration for your mod.


  • Install config-utils by running qpm-rust dependency add config-utils in your project directory.

Make sure to restore after adding the dependencies.

Declaring Your Configuration

First, you will need to define what your configuration will be. Create a ModConfig.hpp header file, this will contain the definition.

In ModConfig.hpp, you should put the following:

#pragma once

#include "config-utils/shared/config-utils.hpp"

// Declare the mod config as "ModConfiguration" and declare all its values and functions.
    // Declare "VariableA"
    CONFIG_VALUE(VariableA, std::string, "Variable Name", "Variable Value");

Here is an example that uses all the types except const char* and char*

#pragma once

#include "config-utils/shared/config-utils.hpp"
#include "UnityEngine/Color.hpp"
#include "UnityEngine/Vector2.hpp"
#include "UnityEngine/Vector3.hpp"
#include "UnityEngine/Vector4.hpp"

    CONFIG_VALUE(VariableString, std::string, "String Example", "Var Value");
    CONFIG_VALUE(VariableInteger, int, "Integer Example", 5);
    CONFIG_VALUE(VariableFloat, float, "Float Example", 1.5f);
    CONFIG_VALUE(VariableBoolean, bool, "Bool Example", false);
    CONFIG_VALUE(VariableDouble, double, "Double Example", 0.39221);
    // Dividing by 255 in color constructor because UnityEngine::Color represents RGB as values in the range of 0 to 1,
    Alpha is simply 0 to 1 as usual.
    CONFIG_VALUE(VariableColor, UnityEngine::Color, "Color Example", UnityEngine::Color(10 / 255, 155 / 255, 90 / 255 , 0));
    CONFIG_VALUE(VariableVector2, UnityEngine::Vector2, "Vector2 Example", UnityEngine::Vector2(1, 2));
    CONFIG_VALUE(VariableVector3, UnityEngine::Vector3, "Vector3 Example", UnityEngine::Vector3(1, 2, 3));
    CONFIG_VALUE(VariableVector4, UnityEngine::Vector4, "Vector4 Example", UnityEngine::Vector4(1, 2, 3, 4));

Defining Your Configuration

All we have to do is include our ModConfig.hpp

#include "ModConfig.hpp"

Loading your Config

Now you can call it by doing getModConfig().{#config_value} and replace {#config_value} with a value you declared in you ModConfig.hpp

extern "C" void load() {
    // Load the config - make sure this is after il2cpp_functions::Init();
    // ... rest of code.

Using Your Configuration

In the following examples, we will be using the example that uses all the types from Declaring Your Configuration

// Get VariableString

// Set VariableString to "Eris cute"
getModConfig().VariableString.SetValue("Eris cute");

// Get VariableVector2 and store it as vec
UnityEngine::Vector2 vec = getModConfig().VariableVector2.GetValue();

// Add 30 to the x value.
vec = vec + UnityEngine::Vector2(30, 0, 0);

// Save VariableVector2 to the new vector

Setting a config variable will automatically save the configuration file.

The configuration file is usually stored at ~/ModData/com.beatgames.beatsaber/Config/ on the Quest. Your mod name will be used to create the configuration file, eg: Qosmetics.json