--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Vector.hh Wed Dec 03 19:16:32 2008 +0000
@@ -0,0 +1,106 @@
+#ifndef VECTOR_HH
+#define VECTOR_HH
+
+#include <iostream>
+#include <cmath>
+
+/**
+ * A 2D Vector class. Implements standard vector operations.
+ */
+template <typename T>
+class _Vector {
+public:
+ T x;
+ T y;
+
+ /**
+ * Default constructor.
+ */
+ _Vector() : x(0), y(0) {}
+
+ /**
+ * Constuctor.
+ *
+ * @param x Initial x-coordinate
+ * @param y Initial y-coordinate
+ */
+ _Vector(T x, T y) : x(x), y(y) {}
+
+ /**
+ * Copy constructor.
+ *
+ * @param v Vector to be copied.
+ */
+ _Vector(const _Vector &v) : x(v.x), y(v.y) {}
+
+ // Operator declarations
+ void operator=(const _Vector &v) {
+ this->x = v.x;
+ this->y = v.y;
+ }
+ _Vector operator+(const _Vector &v) const {
+ return _Vector(this->x+v.x, this->y+v.y);
+ }
+ _Vector operator-(const _Vector &v) const {
+ return _Vector(this->x-v.x, this->y-v.y);
+ }
+ _Vector operator*(const T &scalar) const {
+ return _Vector(this->x*scalar, this->y*scalar);
+ }
+ T operator*(const _Vector &v) const {
+ return (this->x*v.x + this->y*v.y);
+ }
+ _Vector operator/(const T &d) const {
+ return _Vector(this->x/d, this->y/d);
+ }
+ void operator+=(const _Vector &v) {
+ *this = *this + v;
+ }
+ void operator-=(const _Vector &v) {
+ *this = *this - v;
+ }
+ void operator*=(const T &scalar) {
+ *this = *this * scalar;
+ }
+ void operator/=(const T &scalar) {
+ *this = *this / scalar;
+ }
+
+ // Other operations
+ T length() const {
+ return sqrt(sqrLength());
+ }
+ T sqrLength() const {
+ return (this->x * this->x) + (this->y * this->y);
+ }
+ _Vector roundToInt() const {
+ return _Vector((int)(x), (int)(y));
+ }
+};
+
+// Unary operators
+template<typename T>
+_Vector<T> operator*(const T &scalar, const _Vector<T> v) {
+ return (v * scalar);
+}
+
+// Comparison operators
+template<typename T>
+bool operator==(const _Vector<T> &v1, const _Vector<T> &v2) {
+ return ((v1.x == v2.x) && (v1.y == v2.y));
+}
+template<typename T>
+bool operator!=(const _Vector<T> &v1, const _Vector<T> &v2) {
+ return !(v1 == v2);
+}
+
+// Output operator
+template<typename T>
+std::ostream& operator<<(std::ostream &s, const _Vector<T> &v) {
+ return s<<"("<<v.x<<", "<<v.y<<")";
+}
+
+// Standard vector
+typedef _Vector<float> Vector;
+
+#endif