Added vector2.

matrix/Vector2.hpp

@@ -0,0 +1,65 @@
+/**
+ * @file Vector2.hpp
+ *
+ * 2D vector class.
+ *
+ * @author James Goppert <james.goppert@gmail.com>
+ */
+
+#pragma once
+
+#include "math.hpp"
+
+namespace matrix
+{
+
+template <typename Type, size_t M>
+class Vector;
+
+template<typename Type>
+class Vector2 : public Vector<Type, 2>
+{
+public:
+
+    typedef Matrix<Type, 2, 1> Matrix21;
+
+    virtual ~Vector2() {};
+
+    Vector2() :
+        Vector<Type, 2>()
+    {
+    }
+
+    Vector2(const Matrix21 & other) :
+        Vector<Type, 2>(other)
+    {
+    }
+
+    Vector2(const Type *data_) :
+        Vector<Type, 2>(data_)
+    {
+    }
+
+    Vector2(Type x, Type y) : Vector<Type, 2>()
+    {
+        Vector2 &v(*this);
+        v(0) = x;
+        v(1) = y;
+    }
+
+    Type cross(const Matrix21 & b)  const {
+        const Vector2 &a(*this);
+        return a(0)*b(1, 0) - a(1)*b(0, 0);
+    }
+
+    Type operator%(const Matrix21 & b) const {
+        return (*this).cross(b);
+    }
+
+};
+
+typedef Vector2<float> Vector2f;
+
+}; // namespace matrix
+
+/* vim: set et fenc=utf-8 ff=unix sts=0 sw=4 ts=4 : */