Added a turf helper function IsBlockedTurf() for Ike.

Content.Shared/Maps/TurfHelpers.cs

@@ -0,0 +1,56 @@
+using Content.Shared.Physics;
+using Robust.Shared.Interfaces.Map;
+using Robust.Shared.Interfaces.Physics;
+using Robust.Shared.IoC;
+using Robust.Shared.Map;
+using Robust.Shared.Maths;
+
+namespace Content.Shared.Maps
+{
+    public static class TurfHelpers
+    {
+        /// <summary>
+        /// Checks if a turf has something dense on it.
+        /// </summary>
+        public static bool IsBlockedTurf(this TileRef turf, bool filterMobs)
+        {
+            var physics = IoCManager.Resolve<IPhysicsManager>();
+
+            var worldBox = GetWorldTileBox(turf);
+
+            var query = physics.GetCollidingEntities(turf.MapIndex, in worldBox);
+
+            foreach (var body in query)
+            {
+                if (body.CanCollide && body.Hard && (body.CollisionLayer & (int) CollisionGroup.Impassable) != 0)
+                    return false;
+
+                if (filterMobs && (body.CollisionLayer & (int) CollisionGroup.MobMask) != 0)
+                    return false;
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Creates a box the size of a tile, at the same position in the world as the tile.
+        /// </summary>
+        private static Box2 GetWorldTileBox(TileRef turf)
+        {
+            var map = IoCManager.Resolve<IMapManager>();
+            var tileGrid = map.GetGrid(turf.GridIndex);
+            var tileBox = Box2.UnitCentered.Scale(tileGrid.TileSize);
+            return tileBox.Translated(tileGrid.GridTileToWorldPos(turf.GridIndices));
+        }
+
+        /// <summary>
+        /// Creates a box the size of a tile.
+        /// </summary>
+        private static Box2 GetTileBox(this TileRef turf)
+        {
+            var map = IoCManager.Resolve<IMapManager>();
+            var tileGrid = map.GetGrid(turf.GridIndex);
+            return Box2.UnitCentered.Scale(tileGrid.TileSize);
+        }
+    }
+}