From cd1a5e869dbafa11a50e99e193e05bcc5da7c334 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Sat, 5 Aug 2023 11:17:52 +0200
Subject: [PATCH] minedmap/region_group: optimize get() implementation

---
 src/bin/minedmap/region_group.rs | 29 +++++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/src/bin/minedmap/region_group.rs b/src/bin/minedmap/region_group.rs
index 1c08296..4e7c636 100644
--- a/src/bin/minedmap/region_group.rs
+++ b/src/bin/minedmap/region_group.rs
@@ -40,18 +40,23 @@ impl<T> RegionGroup<T> {
 	}
 
 	pub fn get(&self, x: i8, z: i8) -> Option<&T> {
-		match (x, z) {
-			(0, 0) => Some(&self.center),
-			(-1, -1) => self.neighs[0].as_ref(),
-			(-1, 0) => self.neighs[1].as_ref(),
-			(-1, 1) => self.neighs[2].as_ref(),
-			(0, -1) => self.neighs[3].as_ref(),
-			(0, 1) => self.neighs[4].as_ref(),
-			(1, -1) => self.neighs[5].as_ref(),
-			(1, 0) => self.neighs[6].as_ref(),
-			(1, 1) => self.neighs[7].as_ref(),
-			_ => panic!("index out of bounds"),
-		}
+		let index = match (x, z) {
+			(0, 0) => {
+				return Some(&self.center);
+			}
+			(-1, -1) => 0,
+			(-1, 0) => 1,
+			(-1, 1) => 2,
+			(0, -1) => 3,
+			(0, 1) => 4,
+			(1, -1) => 5,
+			(1, 0) => 6,
+			(1, 1) => 7,
+			_ => {
+				return None;
+			}
+		};
+		self.neighs[index].as_ref()
 	}
 
 	pub fn map<U, F>(self, mut f: F) -> RegionGroup<U>