@@ -926,9 +926,9 @@ public void lerp(float x, float y, float z, float amt) {
   static public float angleBetween(PVector v1, PVector v2) {
 
     // We get NaN if we pass in a zero vector which can cause problems
-    // Zero seems like a reasonable angle between a (0,0) vector and something else
-    if (v1.x == 0 && v1.y == 0) return 0.0f;
-    if (v2.x == 0 && v2.y == 0) return 0.0f;
+    // Zero seems like a reasonable angle between a (0,0,0) vector and something else
+    if (v1.x == 0 && v1.y == 0 && v1.z == 0 ) return 0.0f;
+    if (v2.x == 0 && v2.y == 0 && v2.z == 0 ) return 0.0f;
 
     double dot = v1.x * v2.x + v1.y * v2.y + v1.z * v2.z;
     double v1mag = Math.sqrt(v1.x * v1.x + v1.y * v1.y + v1.z * v1.z);
@@ -994,4 +994,4 @@ public int hashCode() {
     result = 31 * result + Float.floatToIntBits(z);
     return result;
   }
-}
+}