added [] operator for vector; tests

UGameEngine/utils/vectorxd.h

     VectorXD(const VectorXD<X>& other);
 
     VectorXD<X>& setScalar(unsigned i, double value);
-    double getScalar(unsigned i);
+    double getScalar(unsigned i) const;
 
     bool isNull() const;
 
     bool operator==(const VectorXD<X>& other) const;
     bool operator!=(const VectorXD<X>& other) const;
 
+    double operator[](unsigned i) const;
+
     bool operator!() const;
     operator bool() const;
 

UGameEngine/utils/vectorxd.hxx

     return *this;
 }
 
-tmpl double VectorXD<X>::getScalar(unsigned i)
+tmpl double VectorXD<X>::getScalar(unsigned i) const
 {
     return _scalars[i];
 }
     return !equal(other);
 }
 
+tmpl double VectorXD<X>::operator[](unsigned i) const
+{
+    return getScalar(i);
+}
+
 tmpl bool VectorXD<X>::operator!() const
 {
     return isNull();

tests/testvector3d.cpp

 
     void norm1();
     void norm2();
+
+    void getScalarOp();
 };
 
 void TestVector3D::gettersSetters1()
     QCOMPARE(v.norm(), 50.0);
 }
 
+void TestVector3D::getScalarOp()
+{
+    double x = 1.42, y = 2.0, z = 3.0;
+    Vector3D v(x, y, z);
+    QCOMPARE(v[0], x);
+    QCOMPARE(v[1], y);
+    QCOMPARE(v[2], z);
+}
+
 QTEST_MAIN(TestVector3D)
 #include "testvector3d.moc"