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using UnityEngine.XR.ARFoundation;


// Adds XRCameraConfigurationExtensions extension methods to XRCameraConfiguration.
// This is for the Android platform only.
using Google.XR.ARCoreExtensions;

// Must be set in the editor.
public ARCameraManager cameraManager;

// Use ARCameraManager to obtain the camera configurations.
using (NativeArray<XRCameraConfiguration> configurations = cameraManager.GetConfigurations(Allocator.Temp))
{
    if (!configurations.IsCreated || (configurations.Length <= 0))
    {
        return;
    }

    // Iterate through the list of returned configs to locate the config you want.
    var desiredConfig = configurations[0];
    for (int i = 1; i < configurations.Length; ++i)
    {
        // Choose a config for a given camera that uses the maximum
        // target FPS and texture dimension. If supported, this config also enables
        // the depth sensor.
        if (configurations[i].GetFPSRange().y > desiredConfig.GetFPSRange().y &&
            configurations[i].GetTextureDimensions().x > desiredConfig.GetTextureDimensions().x &&
            configurations[i].GetTextureDimensions().y > desiredConfig.GetTextureDimensions().y &&
            configurations[i].CameraConfigDepthSensorUsage() == CameraConfigDepthSensorUsage.RequireAndUse)
        {
            desiredConfig = configurations[i];
        }
    }

    // Set the configuration you want. If it succeeds, the session
    // automatically pauses and resumes to apply the new configuration.
    // If it fails, cameraManager.currentConfiguration throws an exception.
    if (desiredConfig != cameraManager.currentConfiguration)
    {
        cameraManager.currentConfiguration = desiredConfig;
    }
}

// Unity's Awake() method
public void Awake()
{
    …
    // If the return value is not a valid index (ex. the value if -1),
    // then no camera configuration will be set. If no previous selection exists, 
    // the ARCore session will use the previously selected camera configuration 
    // or a default configuration.
    arcoreExtensions.OnChooseXRCameraConfiguration = SelectCameraConfiguration;
    …
}

// A custom camera configuration selection function
int SelectCameraConfiguration(List<XRCameraConfiguration> supportedConfigurations)
{
    int index = 0;

    // Use custom logic here to choose the desired configuration from supportedConfigurations.

    return index;
}