cs237-vec3.hxx

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

#ifndef _CS237_VEC3_HXX_
#define _CS237_VEC3_HXX_

#ifndef _CS237_HXX_
#error "c237-vec3.hxx should not be included directly"
#endif

namespace cs237 {

    namespace __detail {

    template <typename T>
    struct vec3 {
        T x, y, z;

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

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

        vec3 & operator= (vec3 const &v);

        vec3 & operator+= (T const &s);
        vec3 & operator+= (vec3 const &v);

        vec3 & operator-= (T const &s);
        vec3 & operator-= (vec3 const &v);

        vec3 & operator*= (T const &s);
        vec3 & operator*= (vec3 const &v);

        vec3 & operator/= (T const &s);

        T length () const;
        vec3 & normalize ();
    };

    template <typename T>
    std::ostream& operator<< (std::ostream& s, vec3<T> const &v);

    } /* _namespace __detail */

    typedef __detail::vec3<float> vec3f;
    typedef __detail::vec3<double> vec3d;

} /* namespace cs237 */

#endif /* !_CS237_VEC3_HXX_ */