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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Computational Engine *
* *
* Copyright (c) 1999-2008, Ben Burton *
* For further details contact Ben Burton (bab@debian.org). *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License as *
* published by the Free Software Foundation; either version 2 of the *
* License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* You should have received a copy of the GNU General Public *
* License along with this program; if not, write to the Free *
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, *
* MA 02110-1301, USA. *
* *
**************************************************************************/
/* end stub */
#include <climits>
#include <cstring>
#include "snappea/nsnappeatriangulation.h"
#include "snappea/kernel/triangulation.h"
#include "snappea/kernel/unix_file_io.h"
#include "triangulation/ntriangulation.h"
namespace regina {
NSnapPeaTriangulation::NSnapPeaTriangulation(const NSnapPeaTriangulation& tri) :
ShareableObject() {
if (tri.snappeaData)
::copy_triangulation(tri.snappeaData, &snappeaData);
else
snappeaData = 0;
}
NSnapPeaTriangulation::NSnapPeaTriangulation(const NTriangulation& tri,
bool allowClosed) {
snappeaData = reginaToSnapPea(tri, allowClosed);
}
NSnapPeaTriangulation::~NSnapPeaTriangulation() {
::free_triangulation(snappeaData);
}
NSnapPeaTriangulation::SolutionType NSnapPeaTriangulation::solutionType()
const {
if (! snappeaData)
return NSnapPeaTriangulation::not_attempted;
return static_cast<SolutionType>(::get_complete_solution_type(snappeaData));
}
double NSnapPeaTriangulation::volume() const {
if (! snappeaData)
return 0;
return ::volume(snappeaData, 0);
}
double NSnapPeaTriangulation::volume(int& precision) const {
if (! snappeaData)
return 0;
return ::volume(snappeaData, &precision);
}
void NSnapPeaTriangulation::saveAsSnapPea(const char* filename) const {
if (snappeaData)
save_triangulation(snappeaData, const_cast<char*>(filename));
}
void NSnapPeaTriangulation::writeTextShort(std::ostream& out) const {
if (snappeaData) {
out << "SnapPea triangulation with " << snappeaData->num_tetrahedra
<< " tetrahedra.";
} else {
out << "Null SnapPea triangulation";
}
}
::Triangulation* NSnapPeaTriangulation::reginaToSnapPea(
const NTriangulation& tri, bool allowClosed) {
// Make sure SnapPea is likely to be comfortable with it.
if (tri.getNumberOfTetrahedra() == 0)
return 0;
if (tri.hasBoundaryFaces())
return 0;
if (! tri.isConnected())
return 0;
if (! tri.isValid())
return 0;
if (! tri.isStandard())
return 0;
if (tri.isIdeal()) {
// If it's ideal, make sure every vertex is ideal.
if (tri.getNumberOfBoundaryComponents() < tri.getNumberOfVertices())
return 0;
} else {
// No boundary faces, not ideal.. must be closed.
if (! allowClosed)
return 0;
// If closed is okay, at least make sure it's one-vertex.
if (1 != tri.getNumberOfVertices())
return 0;
}
if (tri.getNumberOfTetrahedra() >= INT_MAX)
return 0;
::TriangulationData data;
data.name = strdup(tri.getPacketLabel().c_str());
data.num_tetrahedra = tri.getNumberOfTetrahedra();
// Fields recalculated by SnapPea:
data.solution_type = ::not_attempted;
data.volume = 0;
data.orientability = ::unknown_orientability;
data.CS_value_is_known = false;
data.CS_value = 0;
data.num_or_cusps = 0;
data.num_nonor_cusps = 0;
data.cusp_data = 0;
data.tetrahedron_data = new ::TetrahedronData[data.num_tetrahedra];
int tet, face, i, j, k, l;
NTriangulation::TetrahedronIterator it = tri.getTetrahedra().begin();
for (tet = 0; tet < data.num_tetrahedra; tet++) {
for (face = 0; face < 4; face++) {
data.tetrahedron_data[tet].neighbor_index[face] =
tri.tetrahedronIndex((*it)->getAdjacentTetrahedron(face));
for (i = 0; i < 4; i++)
data.tetrahedron_data[tet].gluing[face][i] =
(*it)->getAdjacentTetrahedronGluing(face)[i];
}
// Other fields are recalculated by SnapPea.
for (i = 0; i < 4; i++)
data.tetrahedron_data[tet].cusp_index[i] = -1;
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++)
for (k = 0; k < 4; k++)
for (l = 0; l < 4; l++)
data.tetrahedron_data[tet].curve[i][j][k][l] = 0;
data.tetrahedron_data[tet].filled_shape.real = 0;
data.tetrahedron_data[tet].filled_shape.imag = 0;
it++;
}
::Triangulation* ans;
::data_to_triangulation(&data, &ans);
delete[] data.tetrahedron_data;
free(data.name);
return ans;
}
} // namespace regina
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