Drawable.cs


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using System.Numerics;
using Raylib_cs;

namespace OnekoOnline;

abstract class Drawable : IDisposable
{
    protected int DrawOrder = 0;
    public bool Visible = true;

    public Vector2 Position {
        get => _position;
        set => _position = value.Round();
    }
    private Vector2 _position;

    public Vector2 Size;
    public float Rotation = 0f;
    
    public static readonly HashSet<Drawable> Drawables = [];

    public Drawable() => Drawables.Add(this);

    public virtual int DrawSort => (int)Position.Y;

    public static void DrawAll()
    {
        float delta = Raylib.GetFrameTime();
        foreach (Drawable drawable in Drawables.OrderBy(d => d.DrawSort + d.DrawOrder*1000)) {
            drawable?.Update(delta);
            if (drawable == null || !drawable.Visible) continue;
            drawable?.Draw();
        }
    }

    public static void DisposeAll()
    {
        foreach (Drawable drawable in Drawables.ToArray()) drawable?.Dispose();
        Drawables.Clear();
    }

    public abstract void Draw();

    public abstract void Update(float delta);

    bool disposed =  false;

    public void Dispose()
    {
        if (disposed) return;
        Unload();
        Drawables.Remove(this);
        GC.SuppressFinalize(this);
        disposed = true;
    }

    protected abstract void Unload();

    ~Drawable() => Dispose();
}