On 9/21/06, Olivier Grant <olivier.grant@gmail.com> wrote:
ok, what about this ?
class vector3d_test { public: float x, y, z;
float operator[]( int index ) const { return array[index]; }
float & operator[]( int index ) { return array[index]; }
union { struct { float x; float y; float z; } coord; float array[3]; }; };
but it means you have to call v.coord.x and v[0].
You can get around this using something like this: template< typename T > struct Vector4 { typedef size_t size_type; private: typedef T Vector4<T>::* const vec[4]; static const vec v; public: T x, y, z, w; Vector4(T _x = 0, T _y = 0, T _z = 0, T _w = 0): x(_x), y(_y), z(_z), w(_w) {} const T& operator[](size_type i) const { return this->*v[i]; } T& operator[](size_type i) { return this->*v[i]; } }; template< typename T > const typename Vector4<T>::vec Vector4<T>::v = { &Vector4<T>::x, &Vector4<T>::y, &Vector4<T>::z, &Vector4<T>::z }; Here's the original discussion from gamedev.net http://www.gamedev.net/community/forums/topic.asp?topic_id=261920 This wasn't written by me, I just remembered it from there and thought it might be interesting to you. --Mike