added a method to the Universe class

AppLaser.java

@@ -3,7 +3,14 @@
 public class AppLaser {
     
     public static void main(String [] args) {
-        Universe universe = new Universe(20, 10);
+        Universe universe = new Universe(20, 10, 2, 3, 12);
+
+        universe.addObstacle(4, 4);
+        universe.addObstacle(5, 4);
+        universe.addObstacle(6, 4);
+        universe.addObstacle(7, 4);
+        universe.addObstacle(8, 4);
+        universe.addObstacle(9, 4);
 
         universe.print();
     }

Universe.java

@@ -8,30 +8,39 @@ public class Universe {
 
     // Constructors
 
-    public Universe(int length, int height) {
+    public Universe(int length, int height, int i_start, int j_start, int dir_start) {
         this.grid = new int[height][length];
         this.height = height;
         this.length = length;
         int i, j;
         for (i = 1; i < this.height - 1; i++) {
             for (j = 1; j < this.length - 1; j++) {
-                grid[i][j] = 0;
+                this.grid[i][j] = 0;
             }
         }
 
         for (i = 0; i < this.height; i++) {
-            grid[i][0] = -1;
+            this.grid[i][0] = -1;
-            grid[i][length - 1] = -1;
+            this.grid[i][length - 1] = -1;
         }
 
         for (j = 0; j < this.length; j++) {
-            grid[0][j] = -1;
+            this.grid[0][j] = -1;
-            grid[height - 1][j] = -1;
+            this.grid[height - 1][j] = -1;
         }
+
+        this.grid[i_start][j_start] = dir_start;
     }
 
     // Methods
 
+    public void addObstacle(int pos_i, int pos_j) {
+        if (this.grid[pos_i][pos_j] == 0) {
+            this.grid[pos_i][pos_j] = -1;
+        }
+        else {}
+    }
+
     public void print() {
         int i, j;
         for (i = 0; i < this.height; i++) {

algo.txt

@@ -23,4 +23,14 @@ Le truc avec la pile:
 - Situation:
  - position i sur le plateau
  - position j sur le plateau
- - n le nombre de choix testés pour cette situation (de 0 à 3)
+ - n le nombre de choix testés pour cette situation (de 0 à 3)
+
+types de cases:
+-  0 case vide
+- -1 obstacle
+-  2 miroir gauche
+-  3 miroir droite
+-  10 départ nord
+-  11 départ sud
+-  12 départ est
+-  13 départ ouest