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updated to comply with: 

[introduction of half edges as alternative representation]

No modification should be necessary for the existing code.

most relevant changes:

creation of folder:
vcg/connectors  
vcg/connectors/hedge.h
vcg/connectors/hedge_component.h

addition to the container of half edges to the trimesh:
HEdgeContainer hedge; // container
int hn;               // number of half edges

addition of 
vcg/trimesh/update/halfedge_indexed.h
which contains:
- the functions to compute the half edge representation from the indexed  and vivecersa
- the functions to add or remove an half edge
This commit is contained in:
ganovelli 2010-03-25 16:47:03 +00:00
parent e06c7f7e70
commit 6aa09931c4
1 changed files with 39 additions and 37 deletions
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76
apps/sample/polygonmesh_base/polygonmesh.cpp
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@ -30,7 +30,7 @@
#include <vcg/simplex/face/base.h> #include <vcg/simplex/face/base.h>
/*include the base definition for the edge */ /*include the base definition for the edge */
#include <vcg/simplex/edge/base.h> #include <vcg/connectors/hedge.h>
/*include the base definition for the trimesh*/ /*include the base definition for the trimesh*/
#include <vcg/complex/trimesh/base.h> #include <vcg/complex/trimesh/base.h>
@ -56,7 +56,7 @@
#include <vcg/simplex/face/component_polygon.h> #include <vcg/simplex/face/component_polygon.h>
/* include the support for half edges */ /* include the support for half edges */
#include <vcg/complex/trimesh/edge_support.h> #include <vcg/complex/trimesh/update/halfedge_indexed.h>
using namespace vcg; using namespace vcg;
@ -65,7 +65,7 @@ using namespace std;
// forward declarations // forward declarations
class CFace; class CFace;
class CVertex; class CVertex;
class CEdge; class CHEdge;
class DummyEdge; class DummyEdge;
class MyPolyVertex; class MyPolyVertex;
@ -96,25 +96,26 @@ class CMesh : public vcg::tri::TriMesh< vector<CVertex>, vector<CFace> > {};
*/ */
class MyPolyFace; class MyPolyFace;
class MyPolyVertex; class MyPolyVertex;
struct PolyUsedTypes: public vcg::UsedTypes< vcg::Use<MyPolyVertex>::AsVertexType, struct PolyUsedTypes: public vcg::UsedTypes<vcg::Use<MyPolyVertex> ::AsVertexType,
vcg::Use<CEdge>::AsEdgeType, vcg::Use<CHEdge> ::AsHEdgeType,
vcg::Use<MyPolyFace>::AsFaceType >{}; vcg::Use<MyPolyFace> ::AsFaceType
>{};
class MyPolyVertex:public vcg::Vertex<PolyUsedTypes, class MyPolyVertex:public vcg::Vertex< PolyUsedTypes,
vcg::vertex::Coord3f, vcg::vertex::Coord3f,
vcg::vertex::Normal3f, vcg::vertex::Normal3f,
vcg::vertex::Mark, vcg::vertex::Mark,
vcg::vertex::BitFlags, vcg::vertex::BitFlags,
vcg::vertex::VEAdj>{} ; vcg::vertex::VHAdj>{} ;
class CEdge : public Edge< PolyUsedTypes, edge::BitFlags, class CHEdge : public HEdge< PolyUsedTypes, hedge::BitFlags,
//edge::EFAdj, // pointer to the face //hedge::HFAdj, // pointer to the face
//edge::HEOppAdj, // pointer to the opposite edge //hedge::HOppAdj, // pointer to the opposite edge
//edge::HEVAdj, // pointer to the vertex //hedge::HVAdj, // pointer to the vertex
//edge::HENextAdj, // pointer to the next halfedge //hedge::HNextAdj, // pointer to the next halfedge
edge::HEdgeData // the previous 4 components (just more handy, you can comment this and uncomment the previous four lines) hedge::HEdgeData // the previous 4 components (just more handy, you can comment this and uncomment the previous four lines)
//,edge::HEPrevAdj // pointer to the previous halfedge //,hedge::HPrevAdj // pointer to the previous halfedge
>{}; >{};
class MyPolyFace:public vcg::Face< class MyPolyFace:public vcg::Face<
@ -123,8 +124,9 @@ class MyPolyFace:public vcg::Face<
// It says "this class is a polygon and the memory for its components (e.g. pointer to its vertices // It says "this class is a polygon and the memory for its components (e.g. pointer to its vertices
// will be allocated dynamically") // will be allocated dynamically")
,vcg::face::PFVAdj // Pointer to the vertices (just like FVAdj ) ,vcg::face::PFVAdj // Pointer to the vertices (just like FVAdj )
,vcg::face::PFVAdj
,vcg::face::PFFAdj // Pointer to edge-adjacent face (just like FFAdj ) ,vcg::face::PFFAdj // Pointer to edge-adjacent face (just like FFAdj )
,vcg::face::PFHEAdj // Pointer its half -edges ( you may need this if you use half edges) ,vcg::face::PFHAdj // Pointer its half -edges ( you may need this if you use half edges)
,vcg::face::BitFlags // bit flags ,vcg::face::BitFlags // bit flags
,vcg::face::Normal3f // normal ,vcg::face::Normal3f // normal
> {}; > {};
@ -132,7 +134,7 @@ class MyPolyFace:public vcg::Face<
class MyPolyMesh: public class MyPolyMesh: public
vcg::tri::TriMesh< std::vector<MyPolyVertex>, // the vector of vertices vcg::tri::TriMesh< std::vector<MyPolyVertex>, // the vector of vertices
std::vector<MyPolyFace >, // the vector of faces std::vector<MyPolyFace >, // the vector of faces
std::vector<CEdge> // the vector of edges std::vector<CHEdge> // the vector of edges
>{}; >{};
MyPolyMesh pm; MyPolyMesh pm;
@ -142,15 +144,13 @@ MyPolyMesh pm;
// Globals: the mesh, the OpenGL wrapper to draw the mesh and the trackball. // Globals: the mesh, the OpenGL wrapper to draw the mesh and the trackball.
CMesh mesh,mesh1; CMesh mesh,mesh1;
int main(int argc, char *argv[]) { int main(int argc, char *argv[]) {
int loadmask; int loadmask;
vcg::tri::io::PlyInfo pi; vcg::tri::io::PlyInfo pi;
// pm.hedge.reserve(100000);
if(false){ if(false){
/* /*
first way: first way:
@ -186,45 +186,47 @@ else
// compute the half edges because I'm a half-edge programmer // compute the half edges because I'm a half-edge programmer
vcg::tri::EdgeSupport<MyPolyMesh>::ComputeHalfEdgeFromIndexed(pm); vcg::tri::UpdateHalfEdges<MyPolyMesh>::FromIndexed(pm);
// .... my half edge based code ...... // .... my half edge based code ......
// check for consistency // check for consistency
assert(vcg::tri::EdgeSupport<MyPolyMesh>::CheckConsistency(pm)); assert(vcg::tri::UpdateHalfEdges<MyPolyMesh>::CheckConsistency(pm));
int size = pm.face.size(); int size = pm.face.size();
// add a face to each face with more than 3 vertices ( just one pass) // add a face to each face with more than 3 vertices ( just one pass)
for(int i = 0; i < size; ++i) for(int i = 0; i < size; ++i)
if(!(pm.face[i].IsD())) if(!(pm.face[i].IsD()))
if(pm.face[i].VN()>3){ if(pm.face[i].VN()>3){
MyPolyMesh::EdgePointer ef = pm.face[i].FHEp(); MyPolyMesh::HEdgePointer ef = pm.face[i].FHp();
MyPolyMesh::EdgePointer ef1 = ef -> HENp(); MyPolyMesh::HEdgePointer ef1 = ef -> HNp();
ef1 = ef1->HENp(); ef1 = ef1->HNp();
vcg::tri::EdgeSupport<MyPolyMesh>::AddEdge(pm, ef, ef1 ); vcg::tri::UpdateHalfEdges<MyPolyMesh>::AddHEdge(pm, ef, ef1 );
} }
assert(vcg::tri::EdgeSupport<MyPolyMesh>::CheckConsistency(pm)); assert(vcg::tri::UpdateHalfEdges<MyPolyMesh>::CheckConsistency(pm));
size = pm.face.size(); size = pm.face.size();
// remove an edge for each face // remove an edge for each face
for(int i = 0; i < size; ++i) for(int i = 0; i < size; ++i)
if(!(pm.face[i].IsD() )) if(!(pm.face[i].IsD() ))
{ {
MyPolyMesh::EdgePointer ef = pm.face[i].FHEp(); MyPolyMesh::HEdgePointer ef = pm.face[i].FHp();
if( ef->HEOp()->EFp() !=NULL){ if( ef->HOp()->HFp() !=NULL){
vcg::tri::EdgeSupport<MyPolyMesh>::RemoveEdge(pm,ef); vcg::tri::UpdateHalfEdges<MyPolyMesh>::RemoveHEdge(pm,ef);
} }
} }
// check for consistency // check for consistency
assert(vcg::tri::EdgeSupport<MyPolyMesh>::CheckConsistency(pm)); assert(vcg::tri::UpdateHalfEdges<MyPolyMesh>::CheckConsistency(pm));
// recompute indexed data structure from the half edge data structure // recompute indexed data structure from the half edge data structure
vcg::tri::EdgeSupport<MyPolyMesh>::ComputeIndexedFromHalfEdge(pm ); vcg::tri::UpdateIndexed<MyPolyMesh>::FromHalfEdges(pm );
// create a triangle mesh from a polygon mesh // create a triangle mesh from a polygon mesh
vcg::tri::PolygonSupport<CMesh,MyPolyMesh>::ImportFromPolyMesh(mesh1,pm); vcg::tri::PolygonSupport<CMesh,MyPolyMesh>::ImportFromPolyMesh(mesh1,pm);
// write out the triangle mesh // write out the triangle mesh
vcg::tri::io::ExporterPLY<CMesh>::Save(mesh1,"converted_out.ply",true,pi); vcg::tri::io::ExporterPLY<CMesh>::Save(mesh1,"converted_out.ply",true,pi);