feat: add pathfinding

Client/Application/ViewModels/PathNodeViewModel.cs

@@ -0,0 +1,80 @@
+using Client.Application.Commands;
+using Client.Domain.Common;
+using Client.Domain.Entities;
+using Client.Domain.Service;
+using Client.Domain.ValueObjects;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Client.Application.ViewModels
+{
+    public class PathNodeViewModel : ObservableObject
+    {
+        public Vector3 From => new Vector3(
+           (from.X - hero.Transform.Position.X) / scale + (VieportSize.X / 2),
+           (from.Y - hero.Transform.Position.Y) / scale + (VieportSize.Y / 2),
+           0
+        );
+
+        public Vector3 To => new Vector3(
+           (to.X - hero.Transform.Position.X) / scale + (VieportSize.X / 2),
+           (to.Y - hero.Transform.Position.Y) / scale + (VieportSize.Y / 2),
+           0
+        );
+
+        public float Radius => MAX_RADIUS - (1 / MapViewModel.MIN_SCALE - 1 / scale) / (1 / MapViewModel.MIN_SCALE - 1 / MapViewModel.MAX_SCALE) * (MAX_RADIUS - MIN_RADIUS);
+
+        public float Scale
+        {
+            get => scale;
+            set
+            {
+                if (scale != value)
+                {
+                    scale = value;
+                    OnPropertyChanged("From");
+                    OnPropertyChanged("To");
+                    OnPropertyChanged("Radius");
+                }
+            }
+        }
+        public Vector3 VieportSize
+        {
+            get => vieportSize;
+            set
+            {
+                if (vieportSize != value)
+                {
+                    vieportSize = value;
+                    OnPropertyChanged("From");
+                    OnPropertyChanged("To");
+                }
+            }
+        }
+
+        public PathNodeViewModel(Vector3 from, Vector3 to, Hero hero)
+        {
+            this.from = from;
+            this.to = to;
+            this.hero = hero;
+            hero.Transform.Position.PropertyChanged += HeroPosition_PropertyChanged;
+        }
+
+        private void HeroPosition_PropertyChanged(object? sender, System.ComponentModel.PropertyChangedEventArgs e)
+        {
+            OnPropertyChanged("From");
+            OnPropertyChanged("To");
+        }
+
+        private readonly Vector3 from;
+        private readonly Vector3 to;
+        private readonly Hero hero;
+        private float scale = 1;
+        private static readonly float MAX_RADIUS = 10;
+        private static readonly float MIN_RADIUS = 2;
+        private Vector3 vieportSize = new Vector3(0, 0, 0);
+    }
+}