Computer Science 102
                                  Short Program 6
                               Due 5 April 11:59PM


Adhere to the following programming standards.  Violations will
lead to deductions.

(1) no function should be longer than 30 lines code + whitespace.
(2) the maximum nesting level in any function is ONE
(3) code lines should not extend beyond column 72
(4) no more that one statement may be written on a single line
(5) use reasonably descriptive names for variables and functions
(6) package all functions into a single source code module named camera.c
(7) your program should compile without any warnings with gcc -Wall
(8) indenting should be consistent with logical nesting
(9) diagnostic / debug prints should be disabled/deleted in
    your submission.

In this assignment you will implement the finite rectangular plane
C++ raytracer.  Use the following class definition.

class fplane_t: public plane_t
{
public:
   fplane_t();
   fplane_t(FILE *, model_t *, int);

   virtual double  hits(vec_t *base, vec_t *dir);
   virtual void    dumper(FILE *);

protected:
   vec_t  newloc;     /* last rotated hit point */
   double dims[2];

private:

   mat_t  rot;        /* rotation matrix               */
   vec_t  xdir;
   vec_t  projxdir;   /* xdir projected onto the plane */
};

In addition to the xdir vector and dims value the
dumper should print the projected xdir and the rot matrix