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Paolo Cignoni 2007-05-16 15:13:54 +00:00
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vcg/simplex/face/jumping_pos.h Normal file
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/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004 \/)\/ *
* Visual Computing Lab /\/| *
* ISTI - Italian National Research Council | *
* \ *
* All rights reserved. *
* *
* 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 (http://www.gnu.org/licenses/gpl.txt) *
* for more details. *
* *
****************************************************************************/
/****************************************************************************
****************************************************************************/
#ifndef __VCG_JUMPING_FACE_POS
#define __VCG_JUMPING_FACE_POS
#include <assert.h>
#include <vcg/simplex/face/pos.h>
namespace vcg
{
namespace face
{
/** \addtogroup face */
/*@{*/
template < class FACE_TYPE >
class JumpingPos : public Pos< FACE_TYPE >
{
public: // Typedefs
typedef FACE_TYPE FaceType;
typedef Pos<FaceType> PosType;
typedef JumpingPos<FaceType> JumpingPosType;
typedef typename FaceType::VertexType VertexType;
typedef typename VertexType::CoordType CoordType;
typedef typename VertexType::ScalarType ScalarType;
public:
// Constructors
JumpingPos() : Pos() { m_AlreadyJumped = false; }
JumpingPos(FaceType * const pFace, int const z, VertexType * const pVertex) : Pos(pFace, z, pVertex) { m_AlreadyJumped = false; }
JumpingPos(FaceType * const pFace, int const z) : Pos(pFace, z) { m_AlreadyJumped = false; }
JumpingPos(FaceType * const pFace, VertexType * const pVertex) : Pos(pFace, pVertex) { m_AlreadyJumped = false; }
/*!
* Returns the next edge skipping the border
* _________
* /\ c | b /\
* / \ | / \
* / d \ | / a \
* /______\|/______\
* v
* In this example, if a and d are of-border and the pos is iterating counterclockwise, this method iterate through the faces incident on vertex v,
* producing the sequence a, b, c, d, a.
*/
void NextE()
{
if (face::IsBorder(*f,z) && !m_AlreadyJumped)
{
do PosType::NextE();
while (f!=FFlip());
m_AlreadyJumped = true;
}
else
{
PosType::NextE();
m_AlreadyJumped = false;
}
}
protected:
bool m_AlreadyJumped;
};
/*@}*/
} // end of namespace face
} // end of namespace vcg
#endif // __VCG_JUMPING_FACE_POS