move backend to subfolder

tanks-backend/TanksServer/GameLogic/MoveTanks.cs

@@ -0,0 +1,80 @@
+namespace TanksServer.GameLogic;
+
+internal sealed class MoveTanks(
+    MapEntityManager entityManager,
+    IOptions<GameRules> options,
+    MapService map
+) : ITickStep
+{
+    private readonly GameRules _config = options.Value;
+
+    public Task TickAsync(TimeSpan delta)
+    {
+        foreach (var tank in entityManager.Tanks)
+            tank.Moved = TryMoveTank(tank, delta);
+
+        return Task.CompletedTask;
+    }
+
+    private bool TryMoveTank(Tank tank, TimeSpan delta)
+    {
+        var player = tank.Owner;
+
+        double speed;
+        switch (player.Controls)
+        {
+            case { Forward: false, Backward: false }:
+            case { Forward: true, Backward: true }:
+                return false;
+            case { Forward: true }:
+                speed = +_config.MoveSpeed;
+                break;
+            case { Backward: true }:
+                speed = -_config.MoveSpeed;
+                break;
+            default:
+                return false;
+        }
+
+        speed *= delta.TotalSeconds;
+
+        var angle = tank.Orientation / 16d * 2d * Math.PI;
+        var newX = tank.Position.X + Math.Sin(angle) * speed;
+        var newY = tank.Position.Y - Math.Cos(angle) * speed;
+
+        return TryMoveTankTo(tank, new FloatPosition(newX, newY))
+               || TryMoveTankTo(tank, new FloatPosition(newX, tank.Position.Y))
+               || TryMoveTankTo(tank, new FloatPosition(tank.Position.X, newY));
+    }
+
+    private bool TryMoveTankTo(Tank tank, FloatPosition newPosition)
+    {
+        if (HitsWall(newPosition))
+            return false;
+        if (HitsTank(tank, newPosition))
+            return false;
+
+        tank.Position = newPosition;
+        return true;
+    }
+
+    private bool HitsTank(Tank tank, FloatPosition newPosition) =>
+        entityManager.Tanks
+            .Where(otherTank => otherTank != tank)
+            .Any(otherTank => newPosition.Distance(otherTank.Position) < MapService.TileSize);
+
+    private bool HitsWall(FloatPosition newPosition)
+    {
+        var (topLeft, _) = newPosition.GetBoundsForCenter(MapService.TileSize);
+
+        for (short y = 0; y < MapService.TileSize; y++)
+        for (short x = 0; x < MapService.TileSize; x++)
+        {
+            var pixelToCheck = topLeft.GetPixelRelative(x, y);
+            if (map.Current.IsWall(pixelToCheck))
+                return true;
+        }
+
+        return false;
+    }
+}