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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Computational Engine *
* *
* Copyright (c) 1999-2009, 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 */
/*! \file surfaces/nsorientedquad.h
* \brief Implements normal surface vectors using
* transversely oriented quad coordinates.
*/
#ifndef __NSORIENTEDQUAD_H
#ifndef __DOXYGEN
#define __NSORIENTEDQUAD_H
#endif
#include "regina-core.h"
#include "surfaces/nsmirrored.h"
namespace regina {
class NMatrixInt;
/**
* \weakgroup surfaces
* @{
*/
/**
* A normal surface vector using transversely oriented quadrilateral
* coordinates.
*
* If there are \a t tetrahedra in the underlying
* triangulation, there must be precisely 6<i>t</i> coordinates.
* For each \a i, coordinates 2<i>i</i> and 2<i>i</i>+1 represent
* the \c true and \c false orientations for coordinate \a i in the
* 3<i>t</i>-dimensional quadrilateral coordinate system. See
* NNormalSurfaceVectorQuad for further details.
*
* \warning Support for transversely oriented normal surfaces is still
* experimental, and some features \b will break (e.g., testing
* connectedness, disjointness or embeddedness).
*
* \ifacespython Not present.
*/
class REGINA_API NNormalSurfaceVectorOrientedQuad :
public NNormalSurfaceVectorMirrored {
public:
/**
* Creates a new vector all of whose entries are initialised to
* zero.
*
* @param length the number of elements in the new vector.
*/
NNormalSurfaceVectorOrientedQuad(unsigned length);
/**
* Creates a new vector that is a clone of the given vector.
*
* @param cloneMe the vector to clone.
*/
NNormalSurfaceVectorOrientedQuad(const NVector<NLargeInteger>& cloneMe);
virtual NNormalSurfaceVector* makeMirror(NTriangulation* triang) const;
virtual bool allowsAlmostNormal() const;
virtual bool allowsSpun() const;
virtual bool allowsOriented() const;
virtual const NVertex* isVertexLink(NTriangulation* triang) const;
virtual NLargeInteger getQuadCoord(unsigned long tetIndex,
int quadType, NTriangulation* triang) const;
virtual NLargeInteger getOrientedQuadCoord(unsigned long tetIndex,
int quadType, NTriangulation* triang, bool orientation) const;
virtual NLargeInteger getOctCoord(unsigned long tetIndex,
int octType, NTriangulation* triang) const;
virtual NNormalSurfaceVector* clone() const;
static NNormalSurfaceVector* makeZeroVector(
const NTriangulation* triangulation);
static NMatrixInt* makeMatchingEquations(NTriangulation* triangulation);
static NEnumConstraintList* makeEmbeddedConstraints(
NTriangulation* triangulation);
};
/*@}*/
// Inline functions for NNormalSurfaceVectorOrientedQuad
inline NNormalSurfaceVectorOrientedQuad::NNormalSurfaceVectorOrientedQuad(
unsigned length) : NNormalSurfaceVectorMirrored(length) {
}
inline NNormalSurfaceVectorOrientedQuad::NNormalSurfaceVectorOrientedQuad(
const NVector<NLargeInteger>& cloneMe) :
NNormalSurfaceVectorMirrored(cloneMe) {
}
inline NLargeInteger NNormalSurfaceVectorOrientedQuad::getQuadCoord(
unsigned long tetIndex, int quadType, NTriangulation* tri) const {
return getOrientedQuadCoord(tetIndex, quadType, tri, true)
+ getOrientedQuadCoord(tetIndex, quadType, tri, false);
}
inline NLargeInteger NNormalSurfaceVectorOrientedQuad::getOrientedQuadCoord(
unsigned long tetIndex, int quadType, NTriangulation*,
bool orientation) const {
return (*this)[6 * tetIndex + 2 * quadType +
(orientation ? 0 : 1)];
}
inline const NVertex* NNormalSurfaceVectorOrientedQuad::isVertexLink(
NTriangulation*) const {
// Quad space does not contain vertex links at all.
return 0;
}
inline NLargeInteger NNormalSurfaceVectorOrientedQuad::getOctCoord(
unsigned long, int, NTriangulation*) const {
return zero;
}
} // namespace regina
#endif
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