cs237-vec2.hxx

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/*
 * COPYRIGHT (c) 2013 John Reppy (http://cs.uchicago.edu/~jhr)
 * All rights reserved.
 */

#ifndef _CS237_VEC2_HXX_
#define _CS237_VEC2_HXX_

#ifndef _CS237_HXX_
#error "c237-vec2.hxx should not be included directly"
#endif

namespace cs237 {

    namespace __detail {

    template <typename T>
    struct vec2 {
        T x, y;

        vec2 () : x(T(0)), y(T(0)) { }
        vec2 (vec2 const &v) : x(v.x), y(v.y) { }
        explicit vec2 (T xx) : x(xx), y(T(0)) { }
        explicit vec2 (T xx, T yy) : x(xx), y(yy) { }
        explicit vec2 (vec3<T> const &v);  // first two components of 3-vector
        explicit vec2 (vec4<T> const &v);  // first two components of 4-vector

        T & operator[] (unsigned int const &i);
        T const & operator[] (unsigned int const &i) const;

        vec2 & operator= (vec2 const &v);

        vec2 & operator+= (T const &s);
        vec2 & operator+= (vec2 const &v);

        vec2 & operator-= (T const &s);
        vec2 & operator-= (vec2 const &v);

        vec2 & operator*= (T const &s);
        vec2 & operator*= (vec2 const &v);

        vec2 & operator/= (T const &s);

        T length () const;
        vec2 & normalize ();
    };

    template <typename T>
    std::ostream& operator<< (std::ostream& s, vec2<T> const &v);

    } /* _namespace __detail */

    typedef __detail::vec2<float> vec2f;
    typedef __detail::vec2<double> vec2d;

} /* namespace cs237 */

#endif /* !_CS237_VEC2_HXX_ */