#ifndef CUBE_H_INCLUDED
#define CUBE_H_INCLUDED

/* returns the intersection point of the given point and vector
 * with the unit cube. */
void cube_intersect( double  px, double  py, double  pz,
                     double  vx, double  vy, double  vz,
                     double *ix, double *iy, double *iz );

#endif /* CUBE_H_INCLUDED */