NormalizedCamera.cs

using Godot;
using System;

public partial class NormalizedCamera : Camera2D
{
	public enum Mode : int {
		Fit = 0,
		Fill = 1,
		Stretch = 2
	}

	[Export]
	public int unitsH = 1920;
	[Export]
	public int unitsV = 1080;
	[Export]
	public Mode mode = Mode.Fit;

	[Export]
	public Room currentRoom;

	// Called when the node enters the scene tree for the first time.
	public override void _Ready() {
		var temp = currentRoom;
		currentRoom = null;
		TransitionToRoom(currentRoom);
		currentRoom = temp;
	}

	// Called every frame. 'delta' is the elapsed time since the previous frame.
	public override void _Process(double delta) {
		//var size = new Vector2I(192, 108);
		//var zh = (float)size.X / unitsH;
		//var zv = (float)size.Y / unitsV;
		//Zoom = (mode) switch {
		//	Mode.Fill => new(Mathf.Max(zh, zv), Mathf.Max(zh, zv)),
		//	Mode.Fit => new(Mathf.Min(zh, zv), Mathf.Min(zh, zv)),
		//	Mode.Stretch => new(zh, zv),
		//};
		GlobalPosition = Game.instance.player.GlobalPosition.Clamp(currentRoom.GlobalPosition + Game.roomSize / 2, currentRoom.GlobalPosition + currentRoom.PixelSize - Game.roomSize / 2);
	}

	public void TransitionToRoom(Room room) {
		currentRoom?.Stop();
		Game.instance.player.ProcessMode = ProcessModeEnum.Disabled;
		var tween = GetTree().CreateTween().SetTrans(Tween.TransitionType.Quad);
		tween.SetParallel();
		tween.SetEase(Tween.EaseType.InOut);

		var pos = GetScreenCenterPosition();

		tween.TweenProperty(room, "modulate", Colors.White, 0.5);
		tween.TweenProperty(currentRoom, "modulate", new Color(0f, 0f, 0f, 0f), 0.5);
		var finish = tween.Chain();
		finish.TweenCallback(Callable.From(() => room.Start()));
		finish.TweenCallback(Callable.From(delegate {Game.instance.player.ProcessMode = ProcessModeEnum.Inherit;}));
		currentRoom = room;
	}
}