From 1ba28ab06c8a38710d6b8d45dedeececf48c1d6c Mon Sep 17 00:00:00 2001
From: Martin Felis <martin@fysx.org>
Date: Fri, 10 Nov 2023 10:44:18 +0100
Subject: [PATCH] HexGrid: allow setting bounds via offset coordinate
 rectangle.

---
 HexGrid.cs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/HexGrid.cs b/HexGrid.cs
index 0c3f4dc..8547c15 100644
--- a/HexGrid.cs
+++ b/HexGrid.cs
@@ -7,7 +7,8 @@ using AxialCoordDirectionPair = System.Tuple<Godot.Vector2, Godot.Vector3>;
 public class HexGrid : Resource
 {
     private readonly Vector2 _baseHexSize = new(1, Mathf.Sqrt(3) / 2);
-    private Rect2 _boundsAxialCoords;
+    private Rect2 _boundsAxialCoords = new(-Vector2.Inf, Vector2.Inf);
+    private Rect2 _boundsOffsetCoords = new(-Vector2.Inf, Vector2.Inf);
     private Vector2 _hexScale = new(1, 1);
     private Vector2 _hexSize = new(1, Mathf.Sqrt(3) / 2);
     private Transform2D _hexTransform;
@@ -100,6 +101,12 @@ public class HexGrid : Resource
             GetHexAtOffset(centerOffset + Vector2.One * size / 2));
     }
 
+    public void SetBoundsOffset(HexCell cellSouthEast, Vector2 size)
+    {
+        _boundsOffsetCoords = new Rect2(cellSouthEast.OffsetCoords, size);
+        _boundsAxialCoords = new Rect2(-Vector2.Inf, Vector2.Inf);
+    }
+
     public void AddObstacle(Vector2 axialCoords, float cost = 0)
     {
         AddObstacle(new HexCell(axialCoords), cost);
@@ -140,6 +147,8 @@ public class HexGrid : Resource
     {
         if (!_boundsAxialCoords.HasPoint(axialCoords)) return 0;
 
+        if (!_boundsOffsetCoords.HasPoint(new HexCell(axialCoords).OffsetCoords)) return 0;
+
         float value;
         return Obstacles.TryGetValue(axialCoords, out value) ? value : PathCostDefault;
     }