502 lines
16 KiB
C++
502 lines
16 KiB
C++
/****************************************************************************
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* VCGLib o o *
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* Visual and Computer Graphics Library o o *
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* _ O _ *
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* Copyright(C) 2004 \/)\/ *
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* Visual Computing Lab /\/| *
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* ISTI - Italian National Research Council | *
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* \ *
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* All rights reserved. *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
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* for more details. *
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* *
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****************************************************************************/
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/****************************************************************************
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History
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$Log: not supported by cvs2svn $
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Revision 1.39 2007/12/11 20:18:55 cignoni
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forgotten required std::
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Revision 1.38 2007/12/11 11:35:50 cignoni
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Added the CompactVertexVector garbage collecting function.
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Revision 1.37 2007/10/16 16:46:53 cignoni
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Added Allocator::DeleteFace and Allocator::DeleteVertex; Now the use of SetD() should be deprecated.
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Revision 1.36 2007/01/11 10:24:25 cignoni
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Added test in AddVertices to do not update un-initalized vert references (for newly allocated faces)
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Revision 1.35 2006/11/29 15:58:50 cignoni
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Added check with the new end and avoided dangerous updating of already updated pointers
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Revision 1.34 2006/11/28 22:34:28 cignoni
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Added default constructor with null initialization to adjacency members.
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AddFaces and AddVertices NEED to know if the topology is correctly computed to update it.
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Revision 1.33 2006/11/13 13:12:27 ponchio
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Removed a couple of useless assert.
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Revision 1.32 2006/10/27 11:06:29 ganovelli
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the calls to HasFFAdjacency e HasVFAdjacency have been changed to override them for the optional attributes (see vcg/complex/trimesh/base.h)
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Revision 1.31 2006/10/17 06:54:14 fiorin
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Added #include <assert.h>
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Revision 1.30 2006/10/02 09:31:47 ponchio
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usual typename missing
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Revision 1.29 2006/09/29 15:11:41 giec
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Fixed a few bug.
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Revision 1.28 2006/09/29 14:40:22 cignoni
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Removed a useless, wrong version of AddFaces
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Revision 1.27 2006/02/28 12:22:48 spinelli
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fix bug end iterator++
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Revision 1.26 2006/02/28 12:13:49 spinelli
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fix bug end iterator++
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Revision 1.25 2005/11/10 15:37:58 cignoni
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Removed flags clearing (now it should be in the constructor of face and vertex)
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Revision 1.24 2005/10/13 09:32:11 cignoni
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Re-inserted the cFFp and cVFp access. If only the const version of the member function exists, the compiler will call it
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when a non-const object invokes that function
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Revision 1.23 2005/10/12 17:26:19 ponchio
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cFFp doesn not exist -> FFp (there is the const version...)
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same for cVFp.
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Revision 1.22 2005/10/12 10:47:21 cignoni
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Removed clearing of flags of added faces. Now the flag component has a constructor that clear it.
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FF and VF adjacency are updated only if they are present and consistent (e.g. only if VFp(k) != 0 or FFp(k)!=0)
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Revision 1.21 2005/07/01 11:22:00 cignoni
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Corrected for the fourth time line a cast to Facetype at line 341.
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Read the notes there before changing it again
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Revision 1.20 2005/06/09 14:14:29 ganovelli
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two warnings on type cast
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Revision 1.19 2005/04/27 16:08:39 callieri
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in addfaces, added casting for face* returned from vertex.VFp() [borland]
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Revision 1.18 2005/03/23 13:22:57 turini
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Wrong left parenthesis removed.
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Revision 1.17 2005/03/23 11:29:49 ganovelli
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cast int->iterator corrected
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Revision 1.16 2005/02/19 10:43:11 ponchio
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reverted tarini mod
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Revision 1.15 2005/02/08 17:14:28 tarini
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aggiunto un typecast a (FaceType*) per farlo compilare under Mingw comp
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Revision 1.14 2004/10/14 15:08:04 pietroni
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added #include <vector>
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Revision 1.13 2004/09/07 07:36:32 fasano
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Replaced some typename definitions
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Revision 1.12 2004/08/25 15:15:26 ganovelli
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minor changes to comply gcc compiler (typename's and stuff)
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Revision 1.11 2004/08/07 17:38:00 pietroni
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solved errors on AddFaces relative to VFp pointers of faces
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Revision 1.10 2004/08/07 16:16:32 pietroni
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corrected errors in AddFaces ( must be updated pointers to chain of faces of VFTopology)
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Revision 1.9 2004/08/05 16:44:06 pietroni
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added addafaces funtion with local values
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Revision 1.8 2004/07/15 11:40:34 ganovelli
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VFb to VFp
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Revision 1.7 2004/05/11 14:12:13 ganovelli
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general comment: minor modifications to compile with g++. Almost all
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insertions of "typename" keyword and new line at the end of file
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Revision 1.6 2004/05/10 13:24:21 cignoni
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Updated names of adj functions and added ending newline
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Revision 1.5 2004/04/21 14:06:10 ganovelli
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#ifndef added
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Revision 1.4 2004/03/31 14:43:56 cignoni
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bug in update of VF adj
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Revision 1.3 2004/03/12 15:25:29 cignoni
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Corrected bug on the return of a wrong iterator
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Revision 1.2 2004/03/03 15:35:52 cignoni
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Yet another cr lf mismatch
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Revision 1.1 2004/02/24 21:36:42 cignoni
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grouped documentation, changed typenames and reflection mechanism
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Revision 1.1 2004/02/19 13:11:06 cignoni
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Initial commit
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****************************************************************************/
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#ifndef __VCGLIB_TRIALLOCATOR
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#define __VCGLIB_TRIALLOCATOR
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#include <vector>
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#include <assert.h>
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namespace vcg {
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namespace tri {
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/** \addtogroup trimesh */
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// Placeholder.
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// this one is called by the Compact and overridden by more specialized functions for OCF classes.
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// that manage also the additional types
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template <class vector_type>
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void ReorderFace( std::vector<size_t> &newVertIndex, vector_type &vert)
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{}
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template <class vector_type>
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void ReorderVert( std::vector<size_t> &newVertIndex, vector_type &vert)
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{}
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/*@{*/
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/// Class to safely add vertexes and faces to a mesh updating all the involved pointers.
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/// It provides static memeber to add either vertex or faces to a trimesh.
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template <class AllocateMeshType>
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class Allocator
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{
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public:
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typedef AllocateMeshType MeshType;
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typedef typename MeshType::VertexType VertexType;
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typedef typename MeshType::VertexPointer VertexPointer;
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typedef typename MeshType::VertexIterator VertexIterator;
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typedef typename MeshType::FaceType FaceType;
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typedef typename MeshType::FacePointer FacePointer;
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typedef typename MeshType::FaceIterator FaceIterator;
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/** This class is used when allocating new vertexes and faces to update
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the pointers that can be changed when resizing the involved vectors of vertex or faces.
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It can also be used to prevent any update of the various mesh fields
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(e.g. in case you are building all the connections by hand as in a importer);
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*/
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template<class SimplexPointerType>
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class PointerUpdater
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{
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public:
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void Clear(){newBase=oldBase=newEnd=oldEnd=0;preventUpdateFlag=false;};
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void Update(SimplexPointerType &vp)
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{
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if(vp>=newBase && vp<newEnd) return;
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assert(vp>=oldBase);
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assert(vp<oldEnd);
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vp=newBase+(vp-oldBase);
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}
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bool NeedUpdate() {if(oldBase && newBase!=oldBase && !preventUpdateFlag) return true; else return false;}
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SimplexPointerType oldBase;
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SimplexPointerType newBase;
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SimplexPointerType newEnd;
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SimplexPointerType oldEnd;
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bool preventUpdateFlag; /// when true no update is considered necessary.
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};
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/** Function to add n vertices to the mesh. The second parameter hold a vector of
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pointers to pointer to elements of the mesh that should be updated after a
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possible vector realloc.
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@param n Il numero di vertici che si vuole aggiungere alla mesh.
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@param local_var Vettore di variabili locali che rappresentano puntatori a vertici.
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restituisce l'iteratore al primo elemento aggiunto.
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*/
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static VertexIterator AddVertices(MeshType &m,int n, PointerUpdater<VertexPointer> &pu)
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{
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VertexIterator last;
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pu.Clear();
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if(m.vert.empty()) pu.oldBase=0; // if the vector is empty we cannot find the last valid element
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else {
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pu.oldBase=&*m.vert.begin();
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pu.oldEnd=&m.vert.back()+1;
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}
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m.vert.resize(m.vert.size()+n);
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m.vn+=n;
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pu.newBase = &*m.vert.begin();
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pu.newEnd = &m.vert.back()+1;
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if(pu.NeedUpdate())
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{
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FaceIterator fi;
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for (fi=m.face.begin(); fi!=m.face.end(); ++fi)
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if(!(*fi).IsD())
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{
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if ((*fi).cV(0)!=0) pu.Update((*fi).V(0));
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if ((*fi).cV(1)!=0) pu.Update((*fi).V(1));
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if ((*fi).cV(2)!=0) pu.Update((*fi).V(2));
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}
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// e poiche' lo spazio e' cambiato si ricalcola anche last da zero
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}
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unsigned int siz=(unsigned int)m.vert.size()-n;
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last = m.vert.begin();
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advance(last,siz);
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return last;// deve restituire l'iteratore alla prima faccia aggiunta;
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}
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static VertexIterator AddVertices(MeshType &m, int n)
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{
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PointerUpdater<VertexPointer> pu;
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return AddVertices(m, n,pu);
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}
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/** Function to add n faces to the mesh.
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First wrapper, with no parameters
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*/
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static FaceIterator AddFaces(MeshType &m, int n)
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{
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PointerUpdater<FacePointer> pu;
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return AddFaces(m,n,pu);
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}
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/** Function to add n faces to the mesh.
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Second Wrapper, with a vector of face pointer to be updated.
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*/
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static FaceIterator AddFaces(MeshType &m, int n,std::vector<FacePointer *> &local_vec)
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{
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PointerUpdater<FacePointer> pu;
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FaceIterator f_ret= AddFaces(m,n,pu);
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typename std::vector<FacePointer *>::iterator fi;
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for(fi=local_vec.begin();fi!=local_vec.end();++fi)
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pu.Update(**fi);
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return f_ret;
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}
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/** Function to add n faces to the mesh.
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This is the only full featured function that is able to manage correctly all the internal pointers of the mesh (ff and vf relations).
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NOTE: THIS FUNCTION ALSO UPDATE FN
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*/
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static FaceIterator AddFaces(MeshType &m, int n, PointerUpdater<FacePointer> &pu)
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{
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FaceIterator last;
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pu.Clear();
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if(m.face.empty()) {
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pu.oldBase=0; // if the vector is empty we cannot find the last valid element
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} else {
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pu.oldBase=&*m.face.begin();
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pu.oldEnd=&m.face.back()+1;
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last=m.face.end();
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}
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m.face.resize(m.face.size()+n);
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m.fn+=n;
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pu.newBase = &*m.face.begin();
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pu.newEnd = &m.face.back()+1;
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if(pu.NeedUpdate())
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{
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FaceIterator fi;
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for (fi=m.face.begin(); fi!=m.face.end(); ++fi)
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if(!(*fi).IsD())
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{
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if(HasFFAdjacency(m))
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{
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if ((*fi).cFFp(0)!=0) pu.Update((*fi).FFp(0));
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if ((*fi).cFFp(1)!=0) pu.Update((*fi).FFp(1));
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if ((*fi).cFFp(2)!=0) pu.Update((*fi).FFp(2));
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}
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if(HasVFAdjacency(m))
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{
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//update pointers to chain of face incident in a vertex
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//update them only if they are different from zero
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if ((*fi).cVFp(0)!=0) pu.Update((*fi).VFp(0));
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if ((*fi).cVFp(1)!=0) pu.Update((*fi).VFp(1));
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if ((*fi).cVFp(2)!=0) pu.Update((*fi).VFp(2));
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}
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}
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VertexIterator vi;
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for (vi=m.vert.begin(); vi!=m.vert.end(); ++vi)
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if(!(*vi).IsD())
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{
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if(HasVFAdjacency(m))
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if ((*vi).cVFp()!=0)
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pu.Update((FaceType * &)(*vi).VFp());
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// Note the above cast is probably not useful if you have correctly defined
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// your vertex type with the correct name of the facetype as a template argument;
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// pu.Update((FaceType*)(*vi).VFp()); compiles on old gcc and borland
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// pu.Update((*vi).VFp()); compiles on .net and newer gcc
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}
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// e poiche' lo spazio e' cambiato si ricalcola anche last da zero
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}
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unsigned int siz=(unsigned int)m.face.size()-n;
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last = m.face.begin();
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advance(last,siz);
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return last;
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}
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/** Function to delete a face from the mesh.
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NOTE: THIS FUNCTION ALSO UPDATE FN
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*/
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static void DeleteFace(MeshType &m, FaceType &f)
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{
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assert(!f.IsD());
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f.SetD();
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--m.fn;
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}
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/** Function to delete a vertex from the mesh.
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NOTE: THIS FUNCTION ALSO UPDATE vn
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*/
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static void DeleteVertex(MeshType &m, VertexType &v)
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{
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assert(!v.IsD());
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v.SetD();
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--m.vn;
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}
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/*
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Function to compact all the vertices that have been deleted and put them to the end of the vector.
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after this pass the isD test in the scanning of vertex vector, is no more strongly necessary.
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It should not be called when TemporaryData is active;
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*/
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static void CompactVertexVector( MeshType &m )
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{
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// newVertIndex [ <old_vert_position> ] gives you the new position of the vertex in the vector;
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std::vector<size_t> newVertIndex(m.vert.size(),std::numeric_limits<size_t>::max() );
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size_t pos=0;
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size_t i=0;
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for(i=0;i<m.vert.size();++i)
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{
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if(!m.vert[i].IsD())
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{
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if(pos!=i)
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m.vert[pos]=m.vert[i];
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newVertIndex[i]=pos;
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++pos;
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}
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}
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assert(pos==m.vn);
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// call a templated reordering function that manage any additional data internally stored by the vector
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// for the default std::vector no work is needed (some work is typically needed for the OCF stuff)
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ReorderVert<typename MeshType::VertContainer>(newVertIndex,m.vert);
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m.vert.resize(m.vn);
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FaceIterator fi;
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VertexPointer vbase=&m.vert[0];
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for(fi=m.face.begin();fi!=m.face.end();++fi)
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if(!(*fi).IsD())
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for(i=0;i<3;++i)
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{
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size_t oldIndex = (*fi).V(i) - vbase;
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assert(oldIndex >=0 && oldIndex < newVertIndex.size());
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(*fi).V(i) = vbase+newVertIndex[oldIndex];
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}
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}
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/*
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Function to compact all the vertices that have been deleted and put them to the end of the vector.
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after this pass the isD test in the scanning of vertex vector, is no more strongly necessary.
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It should not be called when TemporaryData is active;
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*/
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static void CompactFaceVector( MeshType &m )
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{
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// newFaceIndex [ <old_face_position> ] gives you the new position of the face in the vector;
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std::vector<size_t> newFaceIndex(m.face.size(),std::numeric_limits<size_t>::max() );
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size_t pos=0;
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size_t i=0;
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for(i=0;i<m.face.size();++i)
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{
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if(!m.face[i].IsD())
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{
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if(pos!=i)
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m.face[pos]=m.face[i];
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newFaceIndex[i]=pos;
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++pos;
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}
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}
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assert(pos==m.fn);
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// call a templated reordering function that manage any additional data internally stored by the vector
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// for the default std::vector no work is needed (some work is typically needed for the OCF stuff)
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ReorderFace<typename MeshType::FaceType>(newFaceIndex,m.face);
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// Loop on the vertices to correct VF relation
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VertexIterator vi;
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FacePointer fbase=&m.face[0];
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for (vi=m.vert.begin(); vi!=m.vert.end(); ++vi)
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if(!(*vi).IsD())
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{
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if(HasVFAdjacency(m))
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if ((*vi).cVFp()!=0)
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{
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size_t oldIndex = (*vi).cVFp() - fbase;
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assert(oldIndex >=0 && oldIndex < newFaceIndex.size());
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(*vi).VFp() = fbase+newFaceIndex[oldIndex];
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}
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}
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// Loop on the faces to correct VF and FF relations
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m.face.resize(m.fn);
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FaceIterator fi;
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for(fi=m.face.begin();fi!=m.face.end();++fi)
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if(!(*fi).IsD())
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{
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if(HasVFAdjacency(m))
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for(i=0;i<3;++i)
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if ((*fi).cVFp(i)!=0)
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{
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size_t oldIndex = (*fi).VFp(i) - fbase;
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assert(oldIndex >=0 && oldIndex < newFaceIndex.size());
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(*fi).VFp(i) = fbase+newFaceIndex[oldIndex];
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}
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if(HasFFAdjacency(m))
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for(i=0;i<3;++i)
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if ((*fi).cFFp(i)!=0)
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{
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size_t oldIndex = (*fi).FFp(i) - fbase;
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assert(oldIndex >=0 && oldIndex < newFaceIndex.size());
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(*fi).FFp(i) = fbase+newFaceIndex[oldIndex];
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}
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}
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}
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}; // end class
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/*@}*/
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} // End Namespace TriMesh
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} // End Namespace vcg
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#endif
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