Add zero vector constructor

1 files changed, 9 insertions, 0 deletions

diff --git a/src/ch/epfl/maze/util/Vector2D.java b/src/ch/epfl/maze/util/Vector2D.java
index 66b0216..407851c 100644
--- a/src/ch/epfl/maze/util/Vector2D.java
+++ b/src/ch/epfl/maze/util/Vector2D.java
@@ -9,6 +9,8 @@ public final class Vector2D {
     /* shift constant to compute the hash */
     private static final int SHIFT = 1000;
 
+    private static final int ZERO = 0;
+
     /* 2-dimension coordinates */
     private final int mX, mY;
 
@@ -25,6 +27,13 @@ public final class Vector2D {
     }
 
     /**
+     * Constructs a 2-dimensional zero vector.
+     */
+    public Vector2D() {
+        this(Vector2D.ZERO, Vector2D.ZERO);
+    }
+
+    /**
      * Adds two coordinates to the vector.
      *
      * @param x Horizontal coordinate to add