Finished up efficient elimination of found ships

1 files changed, 10 insertions, 1 deletions

diff --git a/src/math.rs b/src/math.rs
index 2ef1013..ce9d885 100644
--- a/src/math.rs
+++ b/src/math.rs
@@ -116,10 +116,19 @@ impl Point {
         };
 
         let corrected_parr_ship = match reverse {
-            true => parr_ship - length + 1,
+            true => 1 + parr_ship - length,
             false => parr_ship
         };
 
         same_cross && parr_self >= corrected_parr_ship && parr_self < corrected_parr_ship + length
     }
+
+    pub fn is_adjacent(&self, other: Point) -> bool {
+        let dx = if self.x > other.x {self.x - other.x} else {other.x - self.x};
+        let dy = if self.y > other.y {self.y - other.y} else {other.y - self.y};
+
+        (dx == 0 && dy == 1) ||
+            (dx == 1 && dy == 0)
+        
+    }
 }