#ifndef Lens_H
#define Lens_H

/* Last edited on 2007-02-01 02:48:08 by stolfi */

/* Procedures to build Lens. */

#define Lens_H_copyright \
  "Copyright © 2000 Universidade Estadual de Campinas (UNICAMP)"

#include <Octf.h>
#include <Triangulation.h>

#include <r4.h>
#include <vec.h>

Place_t MakeLens1(void);
  /* This procedure builds the 3-map generated by gluing @places of opposite wall
     of a triangulated dodecahedron, when one menber of each @place is matched to
     its conterpart after a rotation of 36 degrees of a turn. */

Place_t MakeLens2(void);
  /* This procedure builds the 3-map generated by gluing @places of opposite wall
     of a triangulated dodecahedron, when one menber of each @place is matched to
     its conterpart after a rotation of 108 degrees of a turn. */

Place_t MakeLens3(void);
  /* This procedure builds the 3-map generated by gluing @places of opposite
     wall of a triangulated dodecahedron, when one menber of each @place is
     matched to its conterpart after a rotation of 180 degree of a turn. */

Place_t MakeLens4(void);
  /* This procedure builds the 3-map generated by gluing @places of opposite
     wall of a triangulated dodecahedron, when one menber of each @place is
     matched to its conterpart after a rotation of 252 degree of a turn.
     (three-tenth of turn in the clockwise sense). */

Place_t MakeLens5(void);
  /* This procedure builds the 3-map generated by gluing @places of opposite
     wall of a triangulated dodecahedron, when one menber of each @place is
     matched to its conterpart after a rotation of 324 degree of a turn. */

#define Lens_H_author \
  "C interface created by J. Stolfi, jan/2007."

#endif