From ca7198be26f8b84d708dffbe2a946ad5846cd10e Mon Sep 17 00:00:00 2001
From: Nathan Wagner <nw@hydaspes.if.org>
Date: Mon, 13 Dec 2010 23:17:54 +0000
Subject: [PATCH] Added HL_square

---
 hexagon.c | 4 ++++
 hexagon.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/hexagon.c b/hexagon.c
index 123e5cf..bd07f25 100644
--- a/hexagon.c
+++ b/hexagon.c
@@ -42,6 +42,10 @@ float HL_fanf[16] = {
 	.577350269189625764509148780502f, 0.0f
 };
 
+/* size of a square that will exactly fit in a hexagon */
+/* 2.0/(1+sqrt(3.0)) */
+double HL_square = .73205080756887729352;
+
 /* these all are for a hex one unit across */
 static double          hexptvd[6][2] = {
 	{.577350269189625764509148780502, 0.0},	/* 1.0/sqrt3 */
diff --git a/hexagon.h b/hexagon.h
index 85683b1..c12614d 100644
--- a/hexagon.h
+++ b/hexagon.h
@@ -144,5 +144,6 @@ struct HL_astar *HL_astar_init(struct HL_astar *s);
 
 extern double HL_fand[16];
 extern float HL_fanf[16];
+extern double HL_square;
 
 #endif
-- 
2.40.0