2 files changed, 24 insertions, 2 deletions

diff --git a/src/ch/epfl/xblast/Cell.java b/src/ch/epfl/xblast/Cell.java
index 8214066..6874b54 100644
--- a/src/ch/epfl/xblast/Cell.java
+++ b/src/ch/epfl/xblast/Cell.java
@@ -10,7 +10,7 @@ import java.util.List;
  * @author Pacien TRAN-GIRARD (261948)
  * @author Timothée FLOURE (257420)
  */
-public final class Cell {
+public final class Cell implements Comparable<Cell> {
 
     /**
      * The width of the board (number of columns).
@@ -194,4 +194,15 @@ public final class Cell {
         return String.format("(%d,%d)", this.x, this.y);
     }
 
+    /**
+     * Compares two Cells relatively to their row major indexes.
+     *
+     * @param cell the other Cell to compare
+     * @return the comparison result
+     */
+    @Override
+    public int compareTo(Cell cell) {
+        return Integer.compare(this.rowMajorIndex(), cell.rowMajorIndex());
+    }
+
 }
diff --git a/src/ch/epfl/xblast/SubCell.java b/src/ch/epfl/xblast/SubCell.java
index 4278fab..fd9db0b 100644
--- a/src/ch/epfl/xblast/SubCell.java
+++ b/src/ch/epfl/xblast/SubCell.java
@@ -6,7 +6,7 @@ package ch.epfl.xblast;
  * @author Pacien TRAN-GIRARD (261948)
  * @author Timothée FLOURE (257420)
  */
-public final class SubCell {
+public final class SubCell implements Comparable<SubCell> {
 
     /**
      * The number of x-subdivisions of each Cell.
@@ -165,4 +165,15 @@ public final class SubCell {
         return this.y * SUB_COLUMNS + this.x;
     }
 
+    /**
+     * Compares two SubCells relatively to their row major indexes.
+     *
+     * @param subCell the other SubCell to compare
+     * @return the comparison result
+     */
+    @Override
+    public int compareTo(SubCell subCell) {
+        return Integer.compare(this.rowMajorIndex(), subCell.rowMajorIndex());
+    }
+
 }