added method MergeFlatFaces (does what it says). Plus clean-ups.
This commit is contained in:
mtarini
parent
45b0deb7eb
commit
240b88a582
|
|
@ -29,69 +29,89 @@
|
|||
#include <vcg/simplex/face/jumping_pos.h>
|
||||
#include <vcg/space/planar_polygon_tessellation.h>
|
||||
|
||||
namespace vcg
|
||||
{
|
||||
namespace tri{
|
||||
/// \ingroup trimesh
|
||||
namespace vcg {
|
||||
namespace tri {
|
||||
/// \ingroup trimesh
|
||||
|
||||
/// \headerfile polygon_support.h vcg/complex/algorithms/polygon_support.h
|
||||
/// \headerfile polygon_support.h vcg/complex/algorithms/polygon_support.h
|
||||
|
||||
/// \brief This class is used convert between polygonal meshes and triangular meshes
|
||||
/// \brief This class is used convert between polygonal meshes and triangular meshes
|
||||
|
||||
/**
|
||||
This class contains two members that allow to build a triangular mesh from a polygonal mesh
|
||||
and viceversa. In a trimesh, the generic polygons with n sides are codified represented by tagging the internal edge of the face
|
||||
with the SetF.
|
||||
*/
|
||||
/**
|
||||
This class contains two members that allow to build a triangular mesh from a polygonal mesh
|
||||
and viceversa. In a trimesh, the generic polygons with n sides are codified represented by tagging the internal edge of the face
|
||||
with the SetF.
|
||||
*/
|
||||
|
||||
template <class TriMeshType,class PolyMeshType >
|
||||
struct PolygonSupport{
|
||||
|
||||
/**
|
||||
Import a trianglemesh from a polygon mesh
|
||||
**/
|
||||
static void ImportFromPolyMesh(TriMeshType & tm, PolyMeshType & pm){
|
||||
std::vector<typename PolyMeshType::CoordType> points;
|
||||
std::vector<int> faces;
|
||||
template <class TriMeshType,class PolyMeshType >
|
||||
struct PolygonSupport{
|
||||
|
||||
// the vertices are the same, simply import them
|
||||
typename PolyMeshType::VertexIterator vi;
|
||||
typename TriMeshType::FaceIterator tfi,tfib ;
|
||||
typename TriMeshType ::VertexIterator tvi = Allocator<TriMeshType>::AddVertices(tm,pm.vert.size());
|
||||
int cnt = 0;
|
||||
for(tvi = tm.vert.begin(),vi = pm.vert.begin(); tvi != tm.vert.end(); ++tvi,++vi,++cnt)
|
||||
if(!(*vi).IsD()) (*tvi).ImportData(*vi); else vcg::tri::Allocator<TriMeshType>::DeleteVertex(tm,(*tvi));
|
||||
|
||||
typename PolyMeshType::FaceIterator fi;
|
||||
for(fi = pm.face.begin(); fi != pm.face.end(); ++fi)
|
||||
if(!((*fi).IsD())){
|
||||
points.clear();
|
||||
for(int i = 0; i < (*fi).VN(); ++i) {
|
||||
typename PolyMeshType::VertexType * v = (*fi).V(i);
|
||||
points.push_back(v->P());
|
||||
/**
|
||||
Given a tri mesh (with per-face normals and FF connectivity),
|
||||
merges flat faces into larger polygons.
|
||||
**/
|
||||
static void MergeFlatFaces(TriMeshType & tm, double tolerance = 0.1E-4){
|
||||
typedef typename TriMeshType::CoordType::ScalarType Scalar;
|
||||
typedef typename TriMeshType::FaceIterator FaceIterator;
|
||||
typedef typename TriMeshType::FaceType FaceType;
|
||||
Scalar minDist = 1 - Scalar(tolerance);
|
||||
for (FaceIterator fi=tm.face.begin(); fi!=tm.face.end(); fi++) {
|
||||
FaceType *fa = &*fi;
|
||||
for (int w=0; w<3; w++) {
|
||||
FaceType *fb = fa->FFp(w);
|
||||
if ( (fb>fa) && (fa->N()*fb->N() > minDist) ) {
|
||||
fa->SetF( w );
|
||||
fb->SetF( fa->FFi(w) ); // reciprocate
|
||||
}
|
||||
faces.clear();
|
||||
TessellatePlanarPolygon3(points,faces);
|
||||
tfib = tfi = Allocator<TriMeshType>::AddFaces(tm,faces.size()/3);
|
||||
for(int i = 0; tfi != tm.face.end();++tfi){
|
||||
(*tfi).V(0) = &tm.vert[ (*fi).V( faces[i] ) - &(*pm.vert.begin())];
|
||||
(*tfi).V(1) = &tm.vert[ (*fi).V( faces[i+1]) - &(*pm.vert.begin())];
|
||||
(*tfi).V(2) = &tm.vert[ (*fi).V( faces[i+2]) - &(*pm.vert.begin())];
|
||||
// set the F flags
|
||||
if( (faces[i]+1)%points.size() != faces[i+1]) (*tfi).SetF(0);
|
||||
if( (faces[i+1]+1)%points.size() != faces[i+2]) (*tfi).SetF(1);
|
||||
if( (faces[i+2]+1)%points.size() != faces[i]) (*tfi).SetF(2);
|
||||
i+=3;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
Import a polygon mesh from a triangle mesh
|
||||
**/
|
||||
static void ImportFromTriMesh( PolyMeshType & pm, TriMeshType & tm){
|
||||
/**
|
||||
Import a trianglemesh from a polygon mesh
|
||||
**/
|
||||
static void ImportFromPolyMesh(TriMeshType & tm, PolyMeshType & pm){
|
||||
std::vector<typename PolyMeshType::CoordType> points;
|
||||
std::vector<int> faces;
|
||||
|
||||
// the vertices are the same, simply import them
|
||||
typename PolyMeshType::VertexIterator vi;
|
||||
typename TriMeshType::FaceIterator tfi,tfib ;
|
||||
typename TriMeshType ::VertexIterator tvi = Allocator<TriMeshType>::AddVertices(tm,pm.vert.size());
|
||||
int cnt = 0;
|
||||
for(tvi = tm.vert.begin(),vi = pm.vert.begin(); tvi != tm.vert.end(); ++tvi,++vi,++cnt)
|
||||
if(!(*vi).IsD()) (*tvi).ImportData(*vi); else vcg::tri::Allocator<TriMeshType>::DeleteVertex(tm,(*tvi));
|
||||
|
||||
typename PolyMeshType::FaceIterator fi;
|
||||
for(fi = pm.face.begin(); fi != pm.face.end(); ++fi)
|
||||
if(!((*fi).IsD())){
|
||||
points.clear();
|
||||
for(int i = 0; i < (*fi).VN(); ++i) {
|
||||
typename PolyMeshType::VertexType * v = (*fi).V(i);
|
||||
points.push_back(v->P());
|
||||
}
|
||||
faces.clear();
|
||||
TessellatePlanarPolygon3(points,faces);
|
||||
tfib = tfi = Allocator<TriMeshType>::AddFaces(tm,faces.size()/3);
|
||||
for(int i = 0; tfi != tm.face.end();++tfi){
|
||||
(*tfi).V(0) = &tm.vert[ (*fi).V( faces[i] ) - &(*pm.vert.begin())];
|
||||
(*tfi).V(1) = &tm.vert[ (*fi).V( faces[i+1]) - &(*pm.vert.begin())];
|
||||
(*tfi).V(2) = &tm.vert[ (*fi).V( faces[i+2]) - &(*pm.vert.begin())];
|
||||
// set the F flags
|
||||
if( (faces[i]+1)%points.size() != faces[i+1]) (*tfi).SetF(0);
|
||||
if( (faces[i+1]+1)%points.size() != faces[i+2]) (*tfi).SetF(1);
|
||||
if( (faces[i+2]+1)%points.size() != faces[i]) (*tfi).SetF(2);
|
||||
i+=3;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
Import a polygon mesh from a triangle mesh
|
||||
**/
|
||||
static void ImportFromTriMesh( PolyMeshType & pm, TriMeshType & tm){
|
||||
|
||||
// the vertices are the same, simply import them
|
||||
int cnt = 0;
|
||||
|
|
@ -140,43 +160,43 @@ namespace vcg
|
|||
// TODO
|
||||
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Given a facepointer, it build a vector with all the vertex pointer
|
||||
// around the polygonal face determined by the current FAUX-EDGE markings
|
||||
// It assumes that the mesh is 2Manifold and has FF adjacency already computed
|
||||
// NOTE: All the faces touched are marked as visited. (so for example you can avoid to get twice the same polygon)
|
||||
static void ExtractPolygon(typename TriMeshType::FacePointer tfp, std::vector<typename TriMeshType::VertexPointer> &vs)
|
||||
// Given a facepointer, it build a vector with all the vertex pointer
|
||||
// around the polygonal face determined by the current FAUX-EDGE markings
|
||||
// It assumes that the mesh is 2Manifold and has FF adjacency already computed
|
||||
// NOTE: All the faces touched are marked as visited. (so for example you can avoid to get twice the same polygon)
|
||||
static void ExtractPolygon(typename TriMeshType::FacePointer tfp, std::vector<typename TriMeshType::VertexPointer> &vs)
|
||||
{
|
||||
vs.clear();
|
||||
// find a non tagged edge
|
||||
int se = -1;
|
||||
for(int i=0; i<3; i++) if (!( tfp->IsF(i))) { se = i; break;}
|
||||
|
||||
// all faux edges return an empty vertex vector!
|
||||
if(se==-1) return;
|
||||
|
||||
// initialize a pos on the first non faux edge
|
||||
typename TriMeshType::VertexPointer v0 = tfp->V(se);
|
||||
|
||||
vcg::face::Pos<typename TriMeshType::FaceType> p(tfp,se,v0);
|
||||
vcg::face::Pos<typename TriMeshType::FaceType> start(p);
|
||||
|
||||
do
|
||||
{
|
||||
vs.clear();
|
||||
// find a non tagged edge
|
||||
int se = -1;
|
||||
for(int i=0; i<3; i++) if (!( tfp->IsF(i))) { se = i; break;}
|
||||
assert(!p.F()->IsF(p.E()));
|
||||
vs.push_back(p.F()->V(p.E()));
|
||||
p.FlipE();
|
||||
|
||||
// all faux edges return an empty vertex vector!
|
||||
if(se==-1) return;
|
||||
|
||||
// initialize a pos on the first non faux edge
|
||||
typename TriMeshType::VertexPointer v0 = tfp->V(se);
|
||||
|
||||
vcg::face::Pos<typename TriMeshType::FaceType> p(tfp,se,v0);
|
||||
vcg::face::Pos<typename TriMeshType::FaceType> start(p);
|
||||
|
||||
do
|
||||
{
|
||||
assert(!p.F()->IsF(p.E()));
|
||||
vs.push_back(p.F()->V(p.E()));
|
||||
p.FlipE();
|
||||
|
||||
while( p.F()->IsF(p.E()) )
|
||||
{
|
||||
p.F()->SetV();
|
||||
p.FlipF();
|
||||
p.FlipE();
|
||||
}
|
||||
p.FlipV();
|
||||
} while(p!=start);
|
||||
}
|
||||
while( p.F()->IsF(p.E()) )
|
||||
{
|
||||
p.F()->SetV();
|
||||
p.FlipF();
|
||||
p.FlipE();
|
||||
}
|
||||
p.FlipV();
|
||||
} while(p!=start);
|
||||
}
|
||||
|
||||
}; // end of struct
|
||||
}} // end namespace vcg::tri
|
||||
|
|
|
|||
Loading…
Reference in New Issue