add vcglib

vcglib/vcg/simplex/face/jumping_pos.h

@@ -0,0 +1,113 @@
+/****************************************************************************
+* VCGLib                                                            o o     *
+* Visual and Computer Graphics Library                            o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2004-2016                                           \/)\/    *
+* 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;
+			using Pos<FACE_TYPE>::f;
+			using Pos<FACE_TYPE>::z;
+			using Pos<FACE_TYPE>::FFlip;
+		public:
+			// Constructors
+			JumpingPos()																																: Pos<FACE_TYPE>()   								{ }
+			JumpingPos(FaceType * const pFace, int const z, VertexType * const pVertex) : Pos<FACE_TYPE>(pFace, z, pVertex)	{   }
+			JumpingPos(FaceType * const pFace, int const z)															: Pos<FACE_TYPE>(pFace, z)						{  }
+			JumpingPos(FaceType * const pFace, VertexType * const pVertex)							: Pos<FACE_TYPE>(pFace, pVertex)			{  }
+
+      /// Move the pos to a border (if exists). Return true if actually succeed to find a border
+      bool FindBorder()
+			{
+				PosType startPos=*this;
+				do
+				{
+					if(f==FFlip() ) {
+					PosType::FlipE();
+					return true; // we are on a border
+					}
+					PosType::FlipF();
+					PosType::FlipE();
+				} while(*this != startPos);
+				
+				return 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, b, c, ... 
+			*/
+			bool NextFE()
+			{
+				if ( f==FFlip() ) // we are on a border
+				{
+					do {
+					PosType::FlipF();
+					PosType::FlipE();
+					} while (f!=FFlip());
+					PosType::FlipE();
+					return false;
+				}
+				else
+				{
+					PosType::FlipF();
+					PosType::FlipE();
+					return true;
+				}
+			}
+		};
+
+		/*@}*/
+	} // end of namespace face
+} // end of namespace vcg
+
+#endif // __VCG_JUMPING_FACE_POS