acdream/src/AcDream.App/Rendering/CameraController.cs

// src/AcDream.App/Rendering/CameraController.cs
namespace AcDream.App.Rendering;

public sealed class CameraController
{
    public OrbitCamera Orbit { get; }
    public FlyCamera Fly { get; }
    public ChaseCamera? Chase { get; private set; }
    public ICamera Active { get; private set; }
    public bool IsFlyMode => Active == Fly;
    public bool IsChaseMode => Chase is not null && Active == Chase;

    public event Action<bool>? ModeChanged;

    public CameraController(OrbitCamera orbit, FlyCamera fly)
    {
        Orbit = orbit;
        Fly = fly;
        Active = orbit;
    }

    public void ToggleFly()
    {
        Active = IsFlyMode ? (ICamera)Orbit : Fly;
        ModeChanged?.Invoke(IsFlyMode);
    }

    public void EnterChaseMode(ChaseCamera chase)
    {
        Chase = chase;
        Active = chase;
        ModeChanged?.Invoke(IsChaseMode);
    }

    public void ExitChaseMode()
    {
        Active = Fly;
        Chase = null;
        ModeChanged?.Invoke(IsFlyMode);
    }

    public void SetAspect(float aspect)
    {
        Orbit.Aspect = aspect;
        Fly.Aspect = aspect;
    }
}