From 4c3dc758438a60fb4b90408c4163671bb96864a3 Mon Sep 17 00:00:00 2001
From: glutzer <glutzer@glutzer.com>
Date: Tue, 3 Jun 2025 13:42:30 -0500
Subject: [PATCH] Add helper methods for map data

---
 Datastructures/IntDataMap2D.cs | 37 ++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/Datastructures/IntDataMap2D.cs b/Datastructures/IntDataMap2D.cs
index f3ec9d5e8..14b567687 100644
--- a/Datastructures/IntDataMap2D.cs
+++ b/Datastructures/IntDataMap2D.cs
@@ -154,6 +154,43 @@ public int GetColorLerpedCorrectly(float x, float z)
             );
         }
 
+        /// <summary>
+        /// Takes global chunk coordinates, returns the values of the 4 corners in that region.
+        /// </summary>
+        public IntMapChunkData GetValues(int chunkX, int chunkZ)
+        {
+            if (Data.Length == 0) return new IntMapChunkData();
+
+            int rlX = chunkX % 16;
+            int rlZ = chunkZ % 16;
 
+            float factor = (float)InnerSize / 16;
+
+            IntMapChunkData mapData;
+
+            mapData.UpperLeft = GetUnpaddedInt((int)(rlX * factor), (int)(rlZ * factor));
+            mapData.UpperRight = GetUnpaddedInt((int)((rlX * factor) + factor), (int)(rlZ * factor));
+            mapData.BottomLeft = GetUnpaddedInt((int)(rlX * factor), (int)((rlZ * factor) + factor));
+            mapData.BottomRight = GetUnpaddedInt((int)((rlX * factor) + factor), (int)((rlZ * factor) + factor));
+
+            return mapData;
+        }
+
+        public struct IntMapChunkData
+        {
+            public int UpperLeft;
+            public int UpperRight;
+            public int BottomLeft;
+            public int BottomRight;
+
+            public readonly float LerpForChunk(int localChunkX, int localChunkZ)
+            {
+                const float chunkBlockDelta = 1f / 32;
+
+                float result = GameMath.BiLerp(UpperLeft, UpperRight, BottomLeft, BottomRight, localChunkX * chunkBlockDelta, localChunkZ * chunkBlockDelta);
+
+                return result;
+            }
+        }
     }
 }