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Refactored a bit the extended marching cube core. Cleaned up a bit the trivial walker to be used by both of them. Updated the sample for marching cube.

This commit is contained in:
Paolo Cignoni 2013-03-22 17:06:41 +00:00
parent 3a9a72c098
commit e94cfb5a43
4 changed files with 156 additions and 150 deletions
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16
apps/sample/trimesh_isosurface/trimesh_isosurface.cpp
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@ -36,9 +36,9 @@ class MyFace;
class MyVertex;
struct MyUsedTypes : public UsedTypes< Use<MyVertex> ::AsVertexType,
Use<MyFace> ::AsFaceType>{};
Use<MyFace> ::AsFaceType>{};
class MyVertex : public Vertex< MyUsedTypes, vertex::Coord3f>{};
class MyVertex : public Vertex< MyUsedTypes, vertex::Coord3f, vertex::Normal3f, vertex::BitFlags>{};
class MyFace : public Face< MyUsedTypes, face::VertexRef, face::BitFlags> {};
class MyMesh : public vcg::tri::TriMesh< std::vector< MyVertex>, std::vector< MyFace > > {};
@ -49,15 +49,15 @@ typedef SimpleVolume<SimpleVoxel> MyVolume;
int main(int /*argc*/ , char **/*argv*/)
{
MyVolume volume;
MyVolume volume;
typedef vcg::tri::TrivialWalker<MyMesh,MyVolume> MyWalker;
typedef vcg::tri::MarchingCubes<MyMesh, MyWalker> MyMarchingCubes;
MyWalker walker;
typedef vcg::tri::MarchingCubes<MyMesh, MyWalker> MyMarchingCubes;
MyWalker walker;
// Simple initialization of the volume with some cool perlin noise
volume.Init(Point3i(64,64,64));
volume.Init(Point3i(64,64,64));
for(int i=0;i<64;i++)
for(int j=0;j<64;j++)
for(int k=0;k<64;k++)

12
vcg/complex/algorithms/create/emc_lookup_table.h
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@ -4,7 +4,7 @@
* Copyright (C) 2002 by Computer Graphics Group, RWTH Aachen *
* www.rwth-graphics.de *
* *
*---------------------------------------------------------------------------*
*---------------------------------------------------------------------------*
* *
* License *
* *
@ -23,7 +23,7 @@
* *
\*===========================================================================*/
//== TABLES ==================================================================
//== TABLES ==================================================================
#ifndef __VCG_EMC_LOOK_UP_TABLE
#define __VCG_EMC_LOOK_UP_TABLE
@ -35,7 +35,7 @@ namespace vcg
class EMCLookUpTable
{
public:
static const int EdgeTable(unsigned char cubetype)
static int EdgeTable(unsigned char cubetype)
{
static const int edgeTable[256]=
{
@ -70,11 +70,11 @@ namespace vcg
0xe90, 0xf99, 0xc93, 0xd9a, 0xa96, 0xb9f, 0x895, 0x99c,
0x69c, 0x795, 0x49f, 0x596, 0x29a, 0x393, 0x99 , 0x190,
0xf00, 0xe09, 0xd03, 0xc0a, 0xb06, 0xa0f, 0x905, 0x80c,
0x70c, 0x605, 0x50f, 0x406, 0x30a, 0x203, 0x109, 0x0
0x70c, 0x605, 0x50f, 0x406, 0x30a, 0x203, 0x109, 0x0
};
return edgeTable[cubetype];
}; // end of EdgeTable
//-----------------------------------------------------------------------------
static int* TriTable(unsigned char cubetype, int u)
@ -904,7 +904,7 @@ namespace vcg
//-----------------------------------------------------------------------------
static const int PolyTable(unsigned int cubetype, int u)
static int PolyTable(unsigned int cubetype, int u)
{
static const int polyTable[8][16] =
{

103
vcg/complex/algorithms/create/extended_marching_cubes.h
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@ -348,13 +348,13 @@ namespace vcg
//--A[i][2] = normals[i][2];
//--b[i] = (points[i] * normals[i]);
A(i,0) = normals[i][0];
A(i,0) = normals[i][1];
A(i,0) = normals[i][2];
A(i,1) = normals[i][1];
A(i,2) = normals[i][2];
b(i) = (points[i] * normals[i]);
}
// SVD of matrix A
Eigen::JacobiSVD<Eigen::MatrixXd> svd(A);
Eigen::JacobiSVD<Eigen::MatrixXd> svd(A, Eigen::ComputeThinU | Eigen::ComputeThinV);
Eigen::MatrixXd sol(3,1);
sol=svd.solve(b);
@ -386,7 +386,7 @@ namespace vcg
// transform x to world coords
//--CoordType point((ScalarType) x[0], (ScalarType) x[1], (ScalarType) x[2]);
CoordType point((ScalarType) sol[0], (ScalarType) sol[1], (ScalarType) sol[2]);
CoordType point((ScalarType) sol(0), (ScalarType) sol(1), (ScalarType) sol(2));
point += center;
// Safety check if the feature point found by svd is
@ -411,58 +411,59 @@ namespace vcg
*/
void FlipEdges()
{
size_t i;
std::vector< LightEdge > edges;
FaceIterator f_iter = _mesh->face.begin();
FaceIterator f_end = _mesh->face.end();
for (i=0; f_iter!=f_end; f_iter++, i++)
std::vector< LightEdge > edges;
for (FaceIterator fi = _mesh->face.begin(); fi!=_mesh->face.end(); fi++)
{
size_t i = tri::Index(*_mesh,*fi);
if (fi->V(1) > fi->V(0)) edges.push_back( LightEdge(i,0) );
if (fi->V(2) > fi->V(1)) edges.push_back( LightEdge(i,1) );
if (fi->V(0) > fi->V(2)) edges.push_back( LightEdge(i,2) );
}
vcg::tri::UpdateTopology< TRIMESH_TYPE >::FaceFace( *_mesh );
// Select all the triangles that has a vertex shared with a non manifold edge.
int nonManifEdge = tri::Clean< TRIMESH_TYPE >::CountNonManifoldEdgeFF(*_mesh,true);
if(nonManifEdge >0)
tri::UpdateSelection< TRIMESH_TYPE >::FaceFromVertexLoose(*_mesh);
//qDebug("Got %i non manif edges",nonManifEdge);
typename std::vector< LightEdge >::iterator e_it = edges.begin();
typename std::vector< LightEdge >::iterator e_end = edges.end();
FacePointer g, f;
int w, z;
for( ; e_it!=e_end; e_it++)
{
f = &_mesh->face[e_it->face];
z = (int) e_it->edge;
// v2------v1 swap the diagonal only if v2 and v3 are feature and v0 and v1 are not.
// | / |
// | / |
// v0------v3
if (!(f->IsS()) && vcg::face::CheckFlipEdge< FaceType >(*f, z))
{
if (f_iter->V(1) > f_iter->V(0)) edges.push_back( LightEdge(i,0) );
if (f_iter->V(2) > f_iter->V(1)) edges.push_back( LightEdge(i,1) );
if (f_iter->V(0) > f_iter->V(2)) edges.push_back( LightEdge(i,2) );
}
vcg::tri::UpdateTopology< TRIMESH_TYPE >::FaceFace( *_mesh );
VertexPointer v0, v1, v2, v3;
v0 = f->V(z);
v1 = f->V1(z);
v2 = f->V2(z);
g = f->FFp(z);
w = f->FFi(z);
v3 = g->V2(w);
bool b0, b1, b2, b3;
b0 = !v0->IsUserBit(_featureFlag) ;
b1 = !v1->IsUserBit(_featureFlag) ;
b2 = v2->IsUserBit(_featureFlag) ;
b3 = v3->IsUserBit(_featureFlag) ;
if( b0 && b1 && b2 && b3)
vcg::face::FlipEdge< FaceType >(*f, z);
// Select all the triangles that has a vertex shared with a non manifold edge.
int nonManifEdge = tri::Clean< TRIMESH_TYPE >::CountNonManifoldEdgeFF(*_mesh,true);
if(nonManifEdge >0)
tri::UpdateSelection< TRIMESH_TYPE >::FaceFromVertexLoose(*_mesh);
//qDebug("Got %i non manif edges",nonManifEdge);
} // end if (vcg::face::CheckFlipEdge< _Face >(*f, z))
} // end for( ; e_it!=e_end; e_it++)
typename std::vector< LightEdge >::iterator e_it = edges.begin();
typename std::vector< LightEdge >::iterator e_end = edges.end();
} //end of FlipEdges
FacePointer g, f;
int w, z;
for( ; e_it!=e_end; e_it++)
{
f = &_mesh->face[e_it->face];
z = (int) e_it->edge;
// v2------v1 swap the diagonal only if v2 and v3 are feature and v0 and v1 are not.
// | / |
// | / |
// v0------v3
if (!(f->IsS()) && vcg::face::CheckFlipEdge< FaceType >(*f, z))
{
VertexPointer v0, v1, v2, v3;
v0 = f->V(z);
v1 = f->V1(z);
v2 = f->V2(z);
g = f->FFp(z);
w = f->FFi(z);
v3 = g->V2(w);
bool b0, b1, b2, b3;
b0 = !v0->IsUserBit(_featureFlag) ;
b1 = !v1->IsUserBit(_featureFlag) ;
b2 = v2->IsUserBit(_featureFlag) ;
b3 = v3->IsUserBit(_featureFlag) ;
if( b0 && b1 && b2 && b3)
vcg::face::FlipEdge< FaceType >(*f, z);
} // end if (vcg::face::CheckFlipEdge< _Face >(*f, z))
} // end for( ; e_it!=e_end; e_it++)
}; //end of FlipEdges
}; // end of class ExtendedMarchingCubes
// /*! @} */
// end of Doxygen documentation

175
vcg/complex/algorithms/create/mc_trivial_walker.h
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@ -8,7 +8,7 @@
* \ *
* All rights reserved. *
* *
* This program is free software; you can redistribute it and/or modify *
* 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. *
@ -26,7 +26,7 @@
namespace vcg {
// Very simple volume class.
// Very simple volume class.
// just an example of the interface that the trivial walker expects
template <class VOX_TYPE>
@ -35,11 +35,11 @@ class SimpleVolume
public:
typedef VOX_TYPE VoxelType;
std::vector<VoxelType> Vol;
Point3i sz; /// Dimensioni griglia come numero di celle per lato
const Point3i &ISize() {return sz;}; /// Dimensioni griglia come numero di celle per lato
const Point3i &ISize() {return sz;} /// Dimensioni griglia come numero di celle per lato
void Init(Point3i _sz)
{
sz=_sz;
@ -47,39 +47,45 @@ public:
}
float Val(const int &x,const int &y,const int &z) const {
return cV(x,y,z).V();
//else return numeric_limits<float>::quiet_NaN( );
return cV(x,y,z).V();
//else return numeric_limits<float>::quiet_NaN( );
}
float &Val(const int &x,const int &y,const int &z) {
return V(x,y,z).V();
//else return numeric_limits<float>::quiet_NaN( );
return V(x,y,z).V();
//else return numeric_limits<float>::quiet_NaN( );
}
VOX_TYPE &V(const int &x,const int &y,const int &z) {
return Vol[x+y*sz[0]+z*sz[0]*sz[1]];
return Vol[x+y*sz[0]+z*sz[0]*sz[1]];
}
VOX_TYPE &V(const Point3i &pi) {
return Vol[ pi[0] + pi[1]*sz[0] + pi[2]*sz[0]*sz[1] ];
}
const VOX_TYPE &cV(const int &x,const int &y,const int &z) const {
return Vol[x+y*sz[0]+z*sz[0]*sz[1]];
return Vol[x+y*sz[0]+z*sz[0]*sz[1]];
}
typedef enum { XAxis=0,YAxis=1,ZAxis=2} VolumeAxis;
typedef enum { XAxis=0,YAxis=1,ZAxis=2} VolumeAxis;
template < class VertexPointerType, VolumeAxis AxisVal >
void GetIntercept(const vcg::Point3i &p1, const vcg::Point3i &p2, VertexPointerType &v, const float thr)
{
float f1 = Val(p1.X(), p1.Y(), p1.Z())-thr;
float f2 = Val(p2.X(), p2.Y(), p2.Z())-thr;
float u = (float) f1/(f1-f2);
if(AxisVal==XAxis) v->P().X() = (float) p1.X()*(1-u) + u*p2.X();
else v->P().X() = (float) p1.X();
if(AxisVal==YAxis) v->P().Y() = (float) p1.Y()*(1-u) + u*p2.Y();
else v->P().Y() = (float) p1.Y();
if(AxisVal==ZAxis) v->P().Z() = (float) p1.Z()*(1-u) + u*p2.Z();
else v->P().Z() = (float) p1.Z();
}
template < class VertexPointerType, VolumeAxis AxisVal >
void GetIntercept(const vcg::Point3i &p1, const vcg::Point3i &p2, VertexPointerType &v, const float thr)
{
float f1 = V(p1).V()-thr;
float f2 = V(p2).V()-thr;
float u = (float) f1/(f1-f2);
if(AxisVal==XAxis) v->P().X() = (float) p1.X()*(1-u) + u*p2.X();
else v->P().X() = (float) p1.X();
if(AxisVal==YAxis) v->P().Y() = (float) p1.Y()*(1-u) + u*p2.Y();
else v->P().Y() = (float) p1.Y();
if(AxisVal==ZAxis) v->P().Z() = (float) p1.Z()*(1-u) + u*p2.Z();
else v->P().Z() = (float) p1.Z();
if(VoxelType::HasNormal()) v->N() = V(p1).N()*(1-u) + V(p2).N()*u;
}
template < class VertexPointerType >
void GetXIntercept(const vcg::Point3i &p1, const vcg::Point3i &p2, VertexPointerType &v, const float thr)
@ -93,32 +99,31 @@ template < class VertexPointerType >
void GetZIntercept(const vcg::Point3i &p1, const vcg::Point3i &p2, VertexPointerType &v, const float thr)
{ GetIntercept<VertexPointerType,ZAxis>(p1,p2,v,thr); }
};
template <class VolumeType>
class RawVolumeImporter
{
public:
enum DataType
{
// Funzioni superiori
UNDEF=0,
BYTE=1,
SHORT=2,
FLOAT=3
};
static bool Open(const char *filename, VolumeType &V, Point3i sz, DataType d)
{
return true;
}
};
class SimpleVoxel
{
private:
float _v;
public:
float &V() {return _v;};
float V() const {return _v;};
float &V() {return _v;}
float V() const {return _v;}
static bool HasNormal() {return false;}
vcg::Point3f N() const {return Point3f(0,0,0);}
vcg::Point3f &N() { static Point3f _p(0,0,0); return _p;}
};
class SimpleVoxelWithNormal
{
private:
float _v;
vcg::Point3f _n;
public:
float &V() {return _v;}
float V() const {return _v;}
vcg::Point3f &N() {return _n;}
vcg::Point3f N() const {return _n;}
static bool HasNormal() {return true;}
};
@ -126,21 +131,21 @@ namespace tri {
// La classe Walker implementa la politica di visita del volume; conoscendo l'ordine di visita del volume
// Ë conveniente che il Walker stesso si faccia carico del caching dei dati utilizzati durante l'esecuzione
// Ë conveniente che il Walker stesso si faccia carico del caching dei dati utilizzati durante l'esecuzione
// degli algoritmi MarchingCubes ed ExtendedMarchingCubes, in particolare il calcolo del volume ai vertici
// delle celle e delle intersezioni della superficie con le celle. In questo esempio il volume da processare
// viene suddiviso in fette; in questo modo se il volume ha dimensione h*l*w (rispettivamente altezza,
// larghezza e profondit‡), lo spazio richiesto per il caching dei vertici gi‡ allocati passa da O(h*l*w)
// a O(h*l).
// a O(h*l).
template <class MeshType, class VolumeType>
class TrivialWalker
{
private:
typedef int VertexIndex;
typedef int VertexIndex;
typedef typename MeshType::ScalarType ScalarType;
typedef typename MeshType::VertexPointer VertexPointer;
public:
public:
// bbox is the portion of the volume to be computed
// resolution determine the sampling step:
@ -148,37 +153,37 @@ private:
void Init(VolumeType &volume)
{
_bbox = Box3i(Point3i(0,0,0),volume.ISize());
_slice_dimension = _bbox.DimX()*_bbox.DimZ();
{
_bbox = Box3i(Point3i(0,0,0),volume.ISize());
_slice_dimension = _bbox.DimX()*_bbox.DimZ();
_x_cs = new VertexIndex[ _slice_dimension ];
_y_cs = new VertexIndex[ _slice_dimension ];
_z_cs = new VertexIndex[ _slice_dimension ];
_x_ns = new VertexIndex[ _slice_dimension ];
_z_ns = new VertexIndex[ _slice_dimension ];
};
~TrivialWalker()
{_thr=0;}
template<class EXTRACTOR_TYPE>
template<class EXTRACTOR_TYPE>
void BuildMesh(MeshType &mesh, VolumeType &volume, EXTRACTOR_TYPE &extractor, const float threshold, vcg::CallBackPos * cb=0)
{
{
Init(volume);
_volume = &volume;
_mesh = &mesh;
_mesh->Clear();
_volume = &volume;
_mesh = &mesh;
_mesh->Clear();
_thr=threshold;
vcg::Point3i p1, p2;
vcg::Point3i p1, p2;
Begin();
extractor.Initialize();
for (int j=_bbox.min.Y(); j<(_bbox.max.Y()-1)-1; j+=1)
{
{
if(cb && ((j%10)==0) ) cb(j*_bbox.DimY()/100.0,"Marching volume");
if(cb && ((j%10)==0) ) cb(j*_bbox.DimY()/100.0,"Marching volume");
for (int i=_bbox.min.X(); i<(_bbox.max.X()-1)-1; i+=1)
{
@ -186,7 +191,7 @@ private:
{
p1.X()=i; p1.Y()=j; p1.Z()=k;
p2.X()=i+1; p2.Y()=j+1; p2.Z()=k+1;
extractor.ProcessCell(p1, p2);
extractor.ProcessCell(p1, p2);
}
}
NextSlice();
@ -198,11 +203,11 @@ private:
float V(int pi, int pj, int pk)
{
return _volume->Val(pi, pj, pk)-_thr;
return _volume->Val(pi, pj, pk)-_thr;
}
bool Exist(const vcg::Point3i &p0, const vcg::Point3i &p1, VertexPointer &v)
{
{
int pos = p0.X()+p0.Z()*_bbox.max.X();
int vidx;
@ -219,8 +224,8 @@ private:
return v!=NULL;
}
void GetXIntercept(const vcg::Point3i &p1, const vcg::Point3i &p2, VertexPointer &v)
{
void GetXIntercept(const vcg::Point3i &p1, const vcg::Point3i &p2, VertexPointer &v)
{
int i = p1.X() - _bbox.min.X();
int z = p1.Z() - _bbox.min.Z();
VertexIndex index = i+z*_bbox.max.X();
@ -231,7 +236,7 @@ private:
{
_x_cs[index] = (VertexIndex) _mesh->vert.size();
pos = _x_cs[index];
Allocator<MeshType>::AddVertices( *_mesh, 1 );
Allocator<MeshType>::AddVertices( *_mesh, 1 );
v = &_mesh->vert[pos];
_volume->GetXIntercept(p1, p2, v, _thr);
return;
@ -249,10 +254,10 @@ private:
return;
}
}
assert(pos >=0 && size_t(pos)< _mesh->vert.size());
assert(pos >=0 && size_t(pos)< _mesh->vert.size());
v = &_mesh->vert[pos];
}
void GetYIntercept(const vcg::Point3i &p1, const vcg::Point3i &p2, VertexPointer &v)
void GetYIntercept(const vcg::Point3i &p1, const vcg::Point3i &p2, VertexPointer &v)
{
int i = p1.X() - _bbox.min.X();
int z = p1.Z() - _bbox.min.Z();
@ -268,7 +273,7 @@ private:
}
v = &_mesh->vert[pos];
}
void GetZIntercept(const vcg::Point3i &p1, const vcg::Point3i &p2, VertexPointer &v)
void GetZIntercept(const vcg::Point3i &p1, const vcg::Point3i &p2, VertexPointer &v)
{
int i = p1.X() - _bbox.min.X();
int z = p1.Z() - _bbox.min.Z();
@ -306,26 +311,26 @@ protected:
int _slice_dimension;
int _current_slice;
VertexIndex *_x_cs; // indici dell'intersezioni della superficie lungo gli Xedge della fetta corrente
VertexIndex *_y_cs; // indici dell'intersezioni della superficie lungo gli Yedge della fetta corrente
VertexIndex *_z_cs; // indici dell'intersezioni della superficie lungo gli Zedge della fetta corrente
VertexIndex *_x_ns; // indici dell'intersezioni della superficie lungo gli Xedge della prossima fetta
VertexIndex *_z_ns; // indici dell'intersezioni della superficie lungo gli Zedge della prossima fetta
VertexIndex *_x_ns; // indici dell'intersezioni della superficie lungo gli Xedge della prossima fetta
VertexIndex *_z_ns; // indici dell'intersezioni della superficie lungo gli Zedge della prossima fetta
MeshType *_mesh;
VolumeType *_volume;
float _thr;
void NextSlice()
{
memset(_x_cs, -1, _slice_dimension*sizeof(VertexIndex));
memset(_y_cs, -1, _slice_dimension*sizeof(VertexIndex));
memset(_z_cs, -1, _slice_dimension*sizeof(VertexIndex));
void NextSlice()
{
memset(_x_cs, -1, _slice_dimension*sizeof(VertexIndex));
memset(_y_cs, -1, _slice_dimension*sizeof(VertexIndex));
memset(_z_cs, -1, _slice_dimension*sizeof(VertexIndex));
std::swap(_x_cs, _x_ns);
std::swap(_z_cs, _z_ns);
std::swap(_z_cs, _z_ns);
_current_slice += 1;
}
@ -338,9 +343,9 @@ protected:
memset(_z_cs, -1, _slice_dimension*sizeof(VertexIndex));
memset(_x_ns, -1, _slice_dimension*sizeof(VertexIndex));
memset(_z_ns, -1, _slice_dimension*sizeof(VertexIndex));
}
};
} // end namespace
} // end namespace
} // end namespace
} // end namespace
#endif // __VCGTEST_WALKER