feat: add creatures and drops on the map

Client/Application/ViewModels/DropMapViewModel.cs

@@ -0,0 +1,84 @@
+using Client.Domain.Common;
+using Client.Domain.Entities;
+using Client.Domain.Enums;
+using Client.Domain.ValueObjects;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.ComponentModel;
+
+namespace Client.Application.ViewModels
+{
+    public class DropMapViewModel : ObservableObject
+    {
+        public uint Id => drop.Id;
+        public string Name => drop.Name;
+        public Vector3 Position => new Vector3(
+            (drop.Transform.Position.X - hero.Transform.Position.X) / scale + (VieportSize.X / 2),
+            (drop.Transform.Position.Y - hero.Transform.Position.Y) / scale + (VieportSize.Y / 2),
+            0
+        );
+        public float Radius => MathF.Max(MAX_RADIUS / scale, MIN_RADIUS);
+        public float Scale
+        {
+            get => scale;
+            set
+            {
+                if (scale != value)
+                {
+                    scale = value;
+                    OnPropertyChanged("Position");
+                    OnPropertyChanged("Radius");
+                }
+            }
+        }
+        public Vector3 VieportSize
+        {
+            get => vieportSize;
+            set
+            {
+                if (vieportSize != value)
+                {
+                    vieportSize = value;
+                    OnPropertyChanged("Position");
+                }
+            }
+        }
+
+        public DropMapViewModel(Drop drop, Hero hero)
+        {
+            this.drop = drop;
+            this.hero = hero;
+            drop.PropertyChanged += Creature_PropertyChanged;
+            drop.Transform.Position.PropertyChanged += Position_PropertyChanged;
+            hero.Transform.Position.PropertyChanged += HeroPosition_PropertyChanged;
+        }
+
+        private void HeroPosition_PropertyChanged(object? sender, PropertyChangedEventArgs e)
+        {
+            OnPropertyChanged("Position");
+        }
+
+        private void Position_PropertyChanged(object? sender, PropertyChangedEventArgs e)
+        {
+            OnPropertyChanged("Position");
+        }
+
+        private void Creature_PropertyChanged(object? sender, PropertyChangedEventArgs e)
+        {
+            if (e.PropertyName == "Name")
+            {
+                OnPropertyChanged("Name");
+            }
+        }
+
+        private readonly Drop drop;
+        private readonly Hero hero;
+        private float scale = 1;
+        private static readonly float MAX_RADIUS = 8;
+        private static readonly float MIN_RADIUS = 2;
+        private Vector3 vieportSize = new Vector3(0, 0, 0);
+    }
+}