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#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
#include <BRepGProp.hxx>
#include <BRep_Tool.hxx>
#include <GeomAPI_ProjectPointOnCurve.hxx>
#include <BRepLProp_SLProps.hxx>
#pragma clang diagnostic pop
#include "occ_edge.hpp"
#include "occ_face.hpp"
#include "occgeom.hpp"
namespace netgen
{
OCCFace::OCCFace(TopoDS_Shape dshape)
: face(TopoDS::Face(dshape))
{
BRepGProp::SurfaceProperties (dshape, props);
bbox = ::netgen::GetBoundingBox(face);
surface = BRep_Tool::Surface(face);
shape_analysis = new ShapeAnalysis_Surface( surface );
tolerance = BRep_Tool::Tolerance( face );
}
size_t OCCFace::GetNBoundaries() const
{
return 0;
}
Point<3> OCCFace::GetCenter() const
{
return occ2ng( props.CentreOfMass() );
}
Array<Segment> OCCFace::GetBoundary(const Mesh& mesh) const
{
auto & geom = dynamic_cast<OCCGeometry&>(*mesh.GetGeometry());
auto n_edges = geom.GetNEdges();
constexpr int UNUSED = 0;
constexpr int FORWARD = 1;
constexpr int REVERSED = 2;
constexpr int BOTH = 3;
Array<int> edge_orientation(n_edges);
edge_orientation = UNUSED;
Array<Handle(Geom2d_Curve)> curve_on_face[BOTH];
curve_on_face[FORWARD].SetSize(n_edges);
curve_on_face[REVERSED].SetSize(n_edges);
Array<TopoDS_Edge> edge_on_face[BOTH];
edge_on_face[FORWARD].SetSize(n_edges);
edge_on_face[REVERSED].SetSize(n_edges);
// In case the face is INTERNAL, we need to orient it to FORWARD to get proper orientation for the edges
// (relative to the face) otherwise, all edges are also INTERNAL
auto oriented_face = TopoDS_Face(face);
if(oriented_face.Orientation() == TopAbs_INTERNAL)
oriented_face.Orientation(TopAbs_FORWARD);
for(auto edge_ : GetEdges(oriented_face))
{
auto edge = TopoDS::Edge(edge_);
auto edgenr = geom.GetEdge(edge).nr;
auto & orientation = edge_orientation[edgenr];
double s0, s1;
auto cof = BRep_Tool::CurveOnSurface (edge, oriented_face, s0, s1);
if(edge.Orientation() == TopAbs_FORWARD || edge.Orientation() == TopAbs_INTERNAL)
{
curve_on_face[FORWARD][edgenr] = cof;
orientation += FORWARD;
edge_on_face[FORWARD][edgenr] = edge;
}
if(edge.Orientation() == TopAbs_REVERSED)
{
curve_on_face[REVERSED][edgenr] = cof;
orientation += REVERSED;
edge_on_face[REVERSED][edgenr] = edge;
}
if(edge.Orientation() == TopAbs_INTERNAL)
{
// add reversed edge
auto r_edge = TopoDS::Edge(edge.Reversed());
auto cof = BRep_Tool::CurveOnSurface (r_edge, oriented_face, s0, s1);
curve_on_face[REVERSED][edgenr] = cof;
orientation += REVERSED;
edge_on_face[REVERSED][edgenr] = r_edge;
}
if(orientation > BOTH)
throw Exception("have edge more than twice in face " + ToString(nr) + " " + properties.GetName() + ", orientation: " + ToString(orientation));
}
Array<Segment> boundary;
for (auto seg : mesh.LineSegments())
{
auto edgenr = seg.epgeominfo[0].edgenr;
auto orientation = edge_orientation[edgenr];
if(orientation == UNUSED)
continue;
for(const auto ORIENTATION : {FORWARD, REVERSED})
{
if((orientation & ORIENTATION) == 0)
continue;
// auto cof = curve_on_face[ORIENTATION][edgenr];
auto edge = edge_on_face[ORIENTATION][edgenr];
double s0, s1;
auto cof = BRep_Tool::CurveOnSurface (edge, face, s0, s1);
double s[2] = { seg.epgeominfo[0].dist, seg.epgeominfo[1].dist };
// dist is in [0,1], map parametrization to [s0, s1]
s[0] = s0 + s[0]*(s1-s0);
s[1] = s0 + s[1]*(s1-s0);
// fixes normal-vector roundoff problem when endpoint is cone-tip
double delta = s[1]-s[0];
s[0] += 1e-10*delta;
s[1] -= 1e-10*delta;
for(auto i : Range(2))
{
// take uv from CurveOnSurface as start value but project again for better accuracy
// (cof->Value yields wrong values (outside of surface) for complicated faces
auto uv = cof->Value(s[i]);
PointGeomInfo gi;
gi.u = uv.X();
gi.v = uv.Y();
Point<3> pproject = mesh[seg[i]];
ProjectPointGI(pproject, gi);
seg.epgeominfo[i].u = gi.u;
seg.epgeominfo[i].v = gi.v;
}
bool do_swap = ORIENTATION == REVERSED;
if(seg.epgeominfo[1].dist < seg.epgeominfo[0].dist)
do_swap = !do_swap;
if(do_swap)
{
swap(seg[0], seg[1]);
swap(seg.epgeominfo[0].dist, seg.epgeominfo[1].dist);
swap(seg.epgeominfo[0].u, seg.epgeominfo[1].u);
swap(seg.epgeominfo[0].v, seg.epgeominfo[1].v);
}
boundary.Append(seg);
}
}
return boundary;
}
PointGeomInfo OCCFace::Project(Point<3>& p) const
{
auto suval = shape_analysis->ValueOfUV(ng2occ(p), tolerance);
double u,v;
suval.Coord(u, v);
p = occ2ng(surface->Value( u, v ));
PointGeomInfo gi;
gi.trignum = nr+1;
gi.u = u;
gi.v = v;
return gi;
}
bool OCCFace::ProjectPointGI(Point<3>& p_, PointGeomInfo& gi) const
{
/*
static Timer t("OCCFace::ProjectPointGI");
RegionTimer rt(t);
// *testout << "input, uv = " << gi.u << ", " << gi.v << endl;
auto suval = shape_analysis->NextValueOfUV({gi.u, gi.v}, ng2occ(p_), tolerance);
gi.trignum = nr+1;
suval.Coord(gi.u, gi.v);
// *testout << "result, uv = " << gi.u << ", " << gi.v << endl;
p_ = occ2ng(surface->Value( gi.u, gi.v ));
return true;
*/
// Old code: do newton iterations manually
double u = gi.u;
double v = gi.v;
auto p = ng2occ(p_);
auto x = surface->Value (u,v);
if (p.SquareDistance(x) <= sqr(PROJECTION_TOLERANCE)) return true;
gp_Vec du, dv;
surface->D1(u,v,x,du,dv);
int count = 0;
gp_Pnt xold;
gp_Vec n;
double det, lambda, mu;
do {
count++;
n = du^dv;
det = Det3 (n.X(), du.X(), dv.X(),
n.Y(), du.Y(), dv.Y(),
n.Z(), du.Z(), dv.Z());
if (det < 1e-15) return false;
lambda = Det3 (n.X(), p.X()-x.X(), dv.X(),
n.Y(), p.Y()-x.Y(), dv.Y(),
n.Z(), p.Z()-x.Z(), dv.Z())/det;
mu = Det3 (n.X(), du.X(), p.X()-x.X(),
n.Y(), du.Y(), p.Y()-x.Y(),
n.Z(), du.Z(), p.Z()-x.Z())/det;
u += lambda;
v += mu;
xold = x;
surface->D1(u,v,x,du,dv);
} while (xold.SquareDistance(x) > sqr(PROJECTION_TOLERANCE) && count < 50);
// (*testout) << "FastProject count: " << count << endl;
if (count == 50) return false;
p_ = occ2ng(x);
gi.u = u; gi.v = v;
return true;
}
Point<3> OCCFace::GetPoint(const PointGeomInfo& gi) const
{
return occ2ng(surface->Value( gi.u, gi.v ));
}
void OCCFace::CalcEdgePointGI(const GeometryEdge& edge,
double t,
EdgePointGeomInfo& egi) const
{
throw Exception(ToString("not implemented") + __FILE__ + ":" + ToString(__LINE__));
}
Box<3> OCCFace::GetBoundingBox() const
{
return bbox;
}
double OCCFace::GetCurvature(const PointGeomInfo& gi) const
{
BRepAdaptor_Surface sf(face, Standard_True);
BRepLProp_SLProps prop2(sf, 2, 1e-5);
prop2.SetParameters (gi.u, gi.v);
return max(fabs(prop2.MinCurvature()),
fabs(prop2.MaxCurvature()));
}
void OCCFace::RestrictH(Mesh& mesh, const MeshingParameters& mparam) const
{
throw Exception(ToString("not implemented") + __FILE__ + ":" + ToString(__LINE__));
}
Vec<3> OCCFace::GetNormal(const Point<3>& p, const PointGeomInfo* gi) const
{
PointGeomInfo gi_;
if(gi==nullptr)
{
auto p_ = p;
gi_ = Project(p_);
gi = &gi_;
}
gp_Pnt pnt;
gp_Vec du, dv;
surface->D1(gi->u,gi->v,pnt,du,dv);
auto n = Cross (occ2ng(du), occ2ng(dv));
n.Normalize();
if (face.Orientation() == TopAbs_REVERSED)
n *= -1;
return n;
}
}
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