Continued

2026-06-04 00:06:18 -07:00
parent 8e9b4412ce
commit 5c11ff4fad
42 changed files with 1287 additions and 29 deletions
@@ -0,0 +1,24 @@
+using Unity.Collections;
+using Unity.Mathematics;
+
+namespace ProjectM.Simulation
+{
+    /// <summary>
+    /// Pure, deterministic build-placement helpers (unit-tested like <see cref="BaseGridMath"/> /
+    /// <c>StorageMath</c>). Occupancy is DERIVED from the live structure set each placement (the structure
+    /// ghosts are the source of truth — restart- and replay-order-safe), never cached on the immutable
+    /// baked <see cref="BaseAnchor"/>. The server passes a Temp <see cref="NativeHashSet{T}"/> of occupied
+    /// cells built by scanning live <see cref="PlacedStructure"/> ghosts.
+    /// </summary>
+    public static class BuildPlacementMath
+    {
+        /// <summary>True if <paramref name="cell"/> is occupied in the derived set.</summary>
+        public static bool IsOccupied(in NativeHashSet<int2> occupied, int2 cell) => occupied.Contains(cell);
+
+        /// <summary>Full server placement legality: the cell is in-plot (half-open, negative-safe) AND not occupied.</summary>
+        public static bool CanPlace(in BaseAnchor anchor, in NativeHashSet<int2> occupied, int2 cell)
+        {
+            return BaseGridMath.IsCellInPlot(anchor, cell) && !occupied.Contains(cell);
+        }
+    }
+}