Facet STL::getFacetAt(const int& i) const
{
if(isFacetIndexValid(i))
{
return Facet();
}
return facets_[i];
}
_TMESH_TMPL_TYPE
VOID _TMESH_TMPL_DECL::GetFacetVertices(iFACET facetIndex, eCOORD coord, REAL coordVal, iVERTEX v[2])
{
cHALF_EDGE* facetHes[2] = { NULL, NULL };
BOOL verticesAreNew[2] = { false, false };
cHALF_EDGE *startingHe = Facet(facetIndex)->FindMinHalfEdge(coord);
cHALF_EDGE *currHe = startingHe;
INT i = 0;
do {
cPOINT3 tailPoint = currHe->Tail()->Point();
cPOINT3 headPoint = currHe->Head()->Point();
REAL heTailCoord = tailPoint[coord];
REAL heHeadCoord = headPoint[coord];
REAL diff1 = coordVal - heTailCoord;
REAL diff2 = heHeadCoord - coordVal;
if(fabs(diff2) < cLIMITS::Tolerance()) {
currHe = currHe->Next();
continue;
}
if(fabs(diff1) < cLIMITS::Tolerance())
v[i++] = currHe->Tail()->Index();
else if(diff1 * diff2 > 0.0) {
cPOINT3 newPoint = ((tailPoint*diff2) + (headPoint*diff1))/(diff1+diff2);
v[i++] = NewVertex(newPoint);
facetHes[i-1] = currHe;
verticesAreNew[i-1] = true;
}
if(i == 2) break;
currHe = currHe->Next();
} while( currHe != startingHe);
if(verticesAreNew[0])
SplitEdge(v[0], facetHes[0]->Tail()->Index(),
facetHes[0]->Head()->Index());
if(verticesAreNew[1])
SplitEdge(v[1], facetHes[1]->Tail()->Index(),
facetHes[1]->Head()->Index());
}
void Obstacle::buildDefault() {
Point3D left(lX, lY, lZ),
right(rX, rY, rZ);
Vector3D dX(rX - lX, 0, 0),
dY(0, rY - lY, 0),
dZ(0, 0, rZ - lZ);
tops = {left, left + dX, left + dY, left + dZ,
right - dZ, right - dX, right - dY, right};
edges = { Edge(0,1), Edge(0,2), Edge(0,3), Edge(1,4),
Edge(1,6), Edge(2,4), Edge(2,5), Edge(3,5),
Edge(3,6), Edge(4,7), Edge(5,7), Edge(6,7) };
facets = { Facet({ 0, 1, 4, 2 }), Facet({ 0, 1, 6, 3 }), Facet({ 0, 2, 5, 3 }),
Facet({ 1, 4, 7, 6 }), Facet({ 2, 4, 7, 5 }), Facet({ 3, 6, 7, 5 }) };
}
void Volume::display_marchin_cube()
{
#ifdef CGAL_SURFACE_MESH_DEMO_USE_MARCHING_CUBE
if(m_surface_mc.empty())
{
QTime total_time;
total_time.start();
values_list->save_values(fileinfo.absoluteFilePath());
unsigned int nx = m_image.xdim();
unsigned int ny = m_image.ydim();
unsigned int nz = m_image.zdim();
if(nx * ny * nz == 0)
{
status_message("No volume loaded.");
return;
}
mc_timer.reset();
busy();
status_message("Marching cubes...");
mc_timer.start();
m_surface_mc.clear();
if(mc.ntrigs()!=0)
mc.clean_all();
mc.set_resolution(nx,ny,nz);
mc.init_all();
mc.set_ext_data(static_cast<unsigned char*>(m_image.image()->data));
nbs_of_mc_triangles.resize(values_list->numberOfValues());
for(int value_id = 0;
value_id < values_list->numberOfValues();
++value_id)
{
status_message(tr("Marching cubes, isovalue #%1...").arg(value_id));
// set data
// for(unsigned int i=0;i<nx;i++)
// for(unsigned int j=0;j<ny;j++)
// for(unsigned int k=0;k<nz;k++)
// {
// const float& value = m_image.value(i,j,k);
// mc.set_data(value,i,j,k);
// }
// compute scaling ratio
if(value_id > 0)
mc.init_temps();
mc.run(values_list->value(value_id),
m_image.vx(),
m_image.vy(),
m_image.vz());
mc.clean_temps();
std::vector<double> facets;
mc.get_facets(facets);
mc_timer.stop();
const unsigned int begin = value_id == 0 ? 0 : nbs_of_mc_triangles[value_id-1];
const unsigned int nbt = facets.size() / 9;
for(unsigned int i=begin;i<nbt;i++)
{
const Point a(facets[9*i], facets[9*i+1], facets[9*i+2]);
const Point b(facets[9*i+3], facets[9*i+4], facets[9*i+5]);
const Point c(facets[9*i+6], facets[9*i+7], facets[9*i+8]);
const Triangle_3 t(a,b,c);
const Vector u = t[1] - t[0];
const Vector v = t[2] - t[0];
Vector n = CGAL::cross_product(u,v);
n = n / std::sqrt(n*n);
m_surface_mc.push_back(Facet(t,n,values_list->item(value_id)));
}
nbs_of_mc_triangles[value_id]=m_surface_mc.size();
mc_timer.start();
}
mc_timer.stop();
not_busy();
mc_total_time = total_time.elapsed();
// invalidate the display list
lists_draw_surface_mc_is_valid = false;
list_draw_marching_cube_is_valid = false;
}
CGAL::Bbox_3 bbox(0,0,0,0,0,0);
for(std::vector<Facet>::const_iterator
it = m_surface_mc.begin(), end = m_surface_mc.end();
it != end; ++it)
{
bbox = bbox + it->get<0>().bbox();
}
m_view_mc = true;
m_view_surface = false;
Q_EMIT changed();
if(!m_surface_mc.empty())
{
Q_EMIT new_bounding_box(bbox.xmin(),
bbox.ymin(),
bbox.zmin(),
bbox.xmax(),
bbox.ymax(),
bbox.zmax());
}
status_message(tr("Marching cubes done. %2 facets in %1s (CPU time), total time is %3s.")
.arg(mc_timer.time())
.arg(m_surface_mc.size())
.arg(mc_total_time/1000.));
save_image_settings(fileinfo.absoluteFilePath());
#endif // CGAL_SURFACE_MESH_DEMO_USE_MARCHING_CUBE
}
_TMESH_TMPL_TYPE
iFACET _TMESH_TMPL_DECL::Clip(iFACET facetIndex, const cSEGMENT3 &cut)
{
cFACET* facet = Facet(facetIndex);
if(facet == NULL || facet->IsDeleted())
return INVALID_IFACET;
iVERTEX cutVertices[2] = { INVALID_IVERTEX, INVALID_IVERTEX };
BOOL insertCutVertices[2] = { false, false };
cPOINT3 points[2];
cEDGE splitEdges[2];
const cPOINT3 &cutTail = cut.Source();
const cPOINT3 &cutHead = cut.Target();
typename cFACET::half_edge_circulator currFacetHe = facet->HalfEdgesBegin();
typename cFACET::half_edge_circulator lastFacetHe = facet->HalfEdgesEnd();
INT numCuts = 0;
for( ; currFacetHe != lastFacetHe ; currFacetHe++) {
cSEGMENT3 heSegment = currFacetHe->Segment();
if(heSegment.HasOn(cutTail)) {
if(!(heSegment.Target() == cutTail)) {
if(heSegment.Source() == cutTail) {
cutVertices[numCuts++] = currFacetHe->Tail()->Index();
}
else {
insertCutVertices[numCuts] = true;
splitEdges[numCuts].v1 = currFacetHe->Tail()->Index();
splitEdges[numCuts].v2 = currFacetHe->Head()->Index();
points[numCuts] = cutTail;
numCuts++;
}
}
}
if(heSegment.HasOn(cutHead)) {
if(!(heSegment.Target() == cutHead)) {
if(heSegment.Source() == cutHead) {
cutVertices[numCuts++] = currFacetHe->Tail()->Index();
}
else {
insertCutVertices[numCuts] = true;
splitEdges[numCuts].v1 = currFacetHe->Tail()->Index();
splitEdges[numCuts].v2 = currFacetHe->Head()->Index();
points[numCuts] = cutHead;
numCuts++;
}
}
}
if(numCuts == 2)
break;
}
//Cuts found.
assert(numCuts == 2);
if(numCuts != 2)
return INVALID_IFACET;
if(insertCutVertices[0]) {
cutVertices[0] = NewVertex(points[0]);
SplitEdge(cutVertices[0], splitEdges[0].v1, splitEdges[0].v2);
}
if(insertCutVertices[1]) {
cutVertices[1] = NewVertex(points[1]);
SplitEdge(cutVertices[1], splitEdges[1].v1, splitEdges[1].v2);
}
return InsertDiagonal(facetIndex, cutVertices[0], cutVertices[1]);
}
void
grow_maximum(Cell_handle c_max,
Triangulation& triang,
map<int, cell_cluster> &cluster_set)
{
// mark it visited.
c_max->visited = true;
cluster_set[c_max->id].in_cluster = true;
cluster_set[c_max->id].outside = c_max->outside;
// Now grow the maximum through the other tetrahedra.
vector<Facet> bdy_stack;
for(int i = 0; i < 4; i ++)
bdy_stack.push_back(Facet(c_max, i));
while(! bdy_stack.empty())
{
Cell_handle old_c = bdy_stack.back().first;
int old_id = bdy_stack.back().second;
bdy_stack.pop_back();
CGAL_assertion(old_c->visited);
CGAL_assertion(cluster_set[old_c->id].in_cluster);
#ifndef __INSIDE__
CGAL_assertion( old_c->outside );
#endif
#ifndef __OUTSIDE__
CGAL_assertion( ! old_c->outside );
#endif
Cell_handle new_c = old_c->neighbor(old_id);
int new_id = new_c->index(old_c);
// If the new_c is infinite then no point in checking
// the flow.
if(triang.is_infinite(new_c))
continue;
// if the flow hits the surface continue.
// if( old_c->outside != new_c->outside)
// continue;
// If new_c is already visited continue.
if(new_c->visited)
continue;
// collect new_c only if new_c flows into old_c via the
// facet in between.
if( is_outflow(Facet(new_c, new_id)) )
{
// CGAL_assertion( !is_outflow(Facet(old_c, old_id)));
if(is_outflow(Facet(old_c, old_id))) continue;
// new_c has to satisfy the following.
CGAL_assertion( !is_maxima(new_c) && !new_c->visited &&
!triang.is_infinite(new_c));
new_c->visited = true;
cluster_set[new_c->id].in_cluster = true;
cluster_set[new_c->id].outside = c_max->outside;
// put the cells accessible via new_c into bdy_stack.
for(int i = 1; i < 4; i ++)
{
if(new_c->neighbor((new_id+i)%4)->visited)
continue;
bdy_stack.push_back(Facet(new_c, (new_id+i)%4));
}
// put new_c into the current cluster.
// In other words merge the current cluster and the cluster owned by
// new_c (as it is initialized).
add_cell_to_cluster(cluster_set, c_max->id, new_c->id);
}
}
}
//---------------------------------------------------------------------------
void OGL::Facet(double x0,double y0,double z0,
double x1,double y1,double z1,
double x2,double y2,double z2)
{
Facet(x0,y0,z0,x1,y1,z1,x2,y2,z2);
}
void GetFacets(pfld::facet_vec& facets, const std::string sfile, const int n, bool bGenerate /*= false*/)
{
if (bGenerate)
{
std::cout << "creating random facets..." << "\n";
std::srand(1);
for (int i = 0; i < n; ++i)
{
ptvec v{ point(rand() % 1001, rand() % 1001, -(rand() % 1001)),
point(rand() % 1001, rand() % 1001, -rand() % 1001),
point(rand() % 1001, rand() % 1001, -rand() % 1001) };
facets.emplace_back(Facet(v));
}
std::ofstream file(sfile, std::ios::out);
if (file.is_open())
{
int i = 0;
for (auto it = facets.begin(); it != facets.end(); ++it)
{
ptvec& fpts = it->Data();
file << "Facet " << i << " " << fpts.size() << "\n";
for (auto itp = fpts.begin(); itp != fpts.end(); ++itp)
file << itp->x << " " << itp->y << " " << itp->z << " ";
file << "\n";
i++;
}
file.close();
}
}
else
{
std::cout << "loading facets..." << "\n";
std::ifstream file(sfile, std::ios_base::in);
if (file.is_open())
{
std::string stmp;
ptvec v(3);
int loadedFacets = 0;
while (std::getline(file, stmp))
{
std::istringstream buffer(stmp);
if (stmp.find("Facet") != std::string::npos)
{
// facet data
}
else
{
std::vector<double> vln{ std::istream_iterator<double>(buffer),
std::istream_iterator<double>() };
for (unsigned i = 0; i < vln.size() / 3; ++i) {
v[i] = point(vln[i * 3 + 0], vln[i * 3 + 1], vln[i * 3 + 2]);
}
facets.emplace_back(Facet(v));
loadedFacets++;
if (loadedFacets >= n)
break;
}
}
file.close();
}
std::cout << "loaded " << facets.size() << " facets." << "\n";
}
}
