#ifndef Tetrahedron_H
#define Tetrahedron_H

/* Last edited on 2007-02-03 23:21:03 by stolfi */

/* Procedures to build tetrahedral polyhedra. */

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

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

#include <r4.h>
#include <vec.h>
 
FourPlaces_t MakeTetrahedron(void);
  /* Builds one tetrahedron such that the places have {PposP==NULL}.
     Use in Baricentric Subdivision. */

Place_t MakeTetra(void);
  /* Same as {MakeTetrahedron}, but returns a single place. */

Place_t Make12Fold(void);
  /* This procedure builds a refined tetrahedron as the subdivision scheme
     know as "12fold", but with one octahedral cell more eigth tetrahedral
     cells. */

Place_t MakeTwoTetra(uint order);
  /* Glues two topological tetrahedron along a one triangulated wall. */

Place_t MakeThreeTetra(uint order);
  /* Glues three topological tetrahedron two by two along a common @{edge->?},
     i.e. builds a map "@{edge->?}star" of degree three. */

void FixCoordsTetra(EightPlaces_t *ca, ElemTableRec_t *top, uint order, Coords_t *c);
  /* Generates fixed coordinate geometry for a subdivided tetrahedron. */

Place_t MakeRawTetra(uint order);
  /* Same as {MakeTetraTopo} but returns a single corner place. */

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

#endif