From 7632401aa4048ff58e28f52589257e23c6eda36e Mon Sep 17 00:00:00 2001
From: fiatcode <fiatcode@posteo.com>
Date: Tue, 24 Feb 2026 10:49:58 +0700
Subject: [PATCH] GREEN: implement plateau boundaries with wrapping

---
 lib/mars_rover.dart | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/lib/mars_rover.dart b/lib/mars_rover.dart
index 9032974..b06c6e1 100644
--- a/lib/mars_rover.dart
+++ b/lib/mars_rover.dart
@@ -2,8 +2,16 @@ class Rover {
   int x;
   int y;
   String direction;
+  final int plateauWidth;
+  final int plateauHeight;
 
-  Rover({required this.x, required this.y, required this.direction});
+  Rover({
+    required this.x,
+    required this.y,
+    required this.direction,
+    this.plateauWidth = 100,
+    this.plateauHeight = 100,
+  });
 
   void turnLeft() {
     const leftTurns = {
@@ -28,16 +36,18 @@ class Rover {
   void moveForward() {
     switch (direction) {
       case 'N':
-        y += 1;
+        y = (y + 1) % (plateauHeight + 1);
         break;
       case 'E':
-        x += 1;
+        x = (x + 1) % (plateauWidth + 1);
         break;
       case 'S':
-        y -= 1;
+        y = (y - 1) % (plateauHeight + 1);
+        if (y < 0) y += plateauHeight + 1;
         break;
       case 'W':
-        x -= 1;
+        x = (x - 1) % (plateauWidth + 1);
+        if (x < 0) x += plateauWidth + 1;
         break;
     }
   }