mirror of
https://github.com/NGSolve/netgen.git
synced 2024-09-22 17:52:50 +05:00
941 lines
20 KiB
C++
941 lines
20 KiB
C++
#include <mystdlib.h>
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#include <linalg.hpp>
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#include <csg.hpp>
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namespace netgen
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{
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void ExtrusionFace :: Init(void)
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{
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p0.SetSize(path->GetNSplines());
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x_dir.SetSize(path->GetNSplines());
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y_dir.SetSize(path->GetNSplines());
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z_dir.SetSize(path->GetNSplines());
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loc_z_dir.SetSize(path->GetNSplines());
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spline3_path.SetSize(path->GetNSplines());
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line_path.SetSize(path->GetNSplines());
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for(int i=0; i<path->GetNSplines(); i++)
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{
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spline3_path[i] = dynamic_cast < const SplineSeg3<3>* >(&path->GetSpline(i));
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line_path[i] = dynamic_cast < const LineSeg<3>* >(&path->GetSpline(i));
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if(line_path[i])
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{
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y_dir[i] = line_path[i]->EndPI() - line_path[i]->StartPI();
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y_dir[i].Normalize();
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z_dir[i] = glob_z_direction;
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Orthogonalize(y_dir[i],z_dir[i]);
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x_dir[i] = Cross(y_dir[i],z_dir[i]);
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loc_z_dir[i] = z_dir[i];
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}
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else
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{
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z_dir[i] = glob_z_direction;
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loc_z_dir[i] = glob_z_direction;
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}
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}
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profile->GetCoeff(profile_spline_coeff);
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latest_point3d = -1.111e30;
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}
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ExtrusionFace :: ExtrusionFace(const SplineSeg<2> * profile_in,
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const SplineGeometry<3> * path_in,
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const Vec<3> & z_direction) :
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profile(profile_in), path(path_in), glob_z_direction(z_direction)
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{
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deletable = false;
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Init();
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}
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ExtrusionFace :: ExtrusionFace(const ARRAY<double> & raw_data)
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{
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deletable = true;
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int pos=0;
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ARRAY< Point<2> > p(3);
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int ptype = int(raw_data[pos]); pos++;
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for(int i=0; i<ptype; i++)
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{
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p[i](0) = raw_data[pos]; pos++;
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p[i](1) = raw_data[pos]; pos++;
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}
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if(ptype == 2)
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{
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profile = new LineSeg<2>(GeomPoint<2>(p[0],1),
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GeomPoint<2>(p[1],1));
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//(*testout) << "appending LineSeg<2> " << p[0]
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// << " to " << p[1] << endl;
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}
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else if(ptype == 3)
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{
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profile = new SplineSeg3<2>(GeomPoint<2>(p[0],1),
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GeomPoint<2>(p[1],1),
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GeomPoint<2>(p[2],1));
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//(*testout) << "appending SplineSeg<3> "
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// << p[0] << " -- " << p[1] << " -- " << p[2] << endl;
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}
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path = new SplineGeometry<3>;
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pos = const_cast< SplineGeometry<3> *>(path)->Load(raw_data,pos);
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for(int i=0; i<3; i++)
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{
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glob_z_direction(i) = raw_data[pos];
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pos++;
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}
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//(*testout) << "read glob_z_direction " << glob_z_direction << endl;
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Init();
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}
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ExtrusionFace :: ~ExtrusionFace()
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{
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if(deletable)
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{
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delete profile;
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delete path;
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}
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}
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int ExtrusionFace :: IsIdentic (const Surface & s2, int & inv, double eps) const
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{
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const ExtrusionFace * ext2 = dynamic_cast<const ExtrusionFace*>(&s2);
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if(!ext2) return 0;
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if(ext2 == this)
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return 1;
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return 0;
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}
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void ExtrusionFace :: Orthogonalize(const Vec<3> & v1, Vec<3> & v2) const
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{
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v2 -= (v1*v2)*v1;
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v2.Normalize();
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}
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void ExtrusionFace :: CalcProj(const Point<3> & point3d, Point<2> & point2d,
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int & seg, double & t) const
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{
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if(Dist2(point3d,latest_point3d) < 1e-25*Dist2(path->GetSpline(0).StartPI(),path->GetSpline(0).EndPI()))
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{
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point2d = latest_point2d;
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seg = latest_seg;
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t = latest_t;
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return;
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}
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latest_point3d = point3d;
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double cutdist(-1);
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ARRAY<double> mindist(path->GetNSplines());
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for(int i=0; i<path->GetNSplines(); i++)
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{
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double auxcut(-1);
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double auxmin(-1);
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if(spline3_path[i])
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{
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Point<3> startp(path->GetSpline(i).StartPI());
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Point<3> endp(path->GetSpline(i).EndPI());
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Point<3> tanp(spline3_path[i]->TangentPoint());
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double da,db,dc;
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double l;
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Vec<3> dir = endp-startp;
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l = dir.Length(); dir *= 1./l;
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Vec<3> topoint = point3d - startp;
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double s = topoint * dir;
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if(s<=0)
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da = topoint.Length();
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else if(s>=l)
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da = Dist(endp,point3d);
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else
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da = sqrt(topoint.Length2() - s*s);
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dir = tanp - startp;
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l = dir.Length(); dir *= 1./l;
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topoint = point3d - startp;
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s = topoint * dir;
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if(s<=0)
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db = topoint.Length();
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else if(s>=l)
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db = Dist(tanp,point3d);
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else
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db = sqrt(topoint.Length2() - s*s);
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dir = endp - tanp;
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l = dir.Length(); dir *= 1./l;
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topoint = point3d - tanp;
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s = topoint * dir;
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if(s<=0)
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dc = topoint.Length();
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else if(s>=l)
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dc = Dist(endp,point3d);
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else
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dc = sqrt(topoint.Length2() - s*s);
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if(da > db && da > dc)
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auxcut = da;
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else
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auxcut = max2(da,min2(db,dc));
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auxmin = min3(da,db,dc);
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}
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else if(line_path[i])
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{
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double l;
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Vec<3> dir = path->GetSpline(i).EndPI() - path->GetSpline(i).StartPI();
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l = dir.Length(); dir *= 1./l;
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Vec<3> topoint = point3d - path->GetSpline(i).StartPI();
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double s = topoint * dir;
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if(s<=0)
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auxcut = topoint.Length();
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else if(s>=l)
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auxcut = Dist(path->GetSpline(i).EndPI(),point3d);
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else
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auxcut = sqrt(topoint.Length2() - s*s);
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auxmin = auxcut;
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}
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mindist[i] = auxmin;
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if(i==0 || auxcut < cutdist)
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cutdist = auxcut;
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/*
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double d1 = Dist2(point3d,path.GetSpline(i).StartPI());
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double d2 = Dist2(point3d,path.GetSpline(i).EndPI());
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if(d1 <= d2)
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{
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mindist[i] = d1;
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if(i==0 || d2 < cutdist)
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cutdist = d2;
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}
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else
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{
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mindist[i] = d2;
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if(i==0 || d1 < cutdist)
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cutdist = d1;
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}
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*/
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}
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//(*testout) << " cutdist " << cutdist << " mindist " << mindist << endl;
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Point<2> testpoint2d;
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Point<3> testpoint3d;
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double minproj(-1);
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bool minproj_set(false);
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//(*testout) << "point "<< point3d << " candidates: ";
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for(int i=0; i<path->GetNSplines(); i++)
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{
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if(mindist[i] > cutdist) continue;
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//(*testout) << i << " ";
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double thist = CalcProj(point3d,testpoint2d,i);
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testpoint3d = p0[i] + testpoint2d(0)*x_dir[i] + testpoint2d(1)*loc_z_dir[i];
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double d = Dist2(point3d,testpoint3d);
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//(*testout) << "(d="<<d<<") ";
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if(!minproj_set || d < minproj)
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{
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minproj_set = true;
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minproj = d;
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point2d = testpoint2d;
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t = thist;
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seg = i;
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latest_seg = i;
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latest_t = t;
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latest_point2d = point2d;
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}
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}
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//(*testout) << endl;
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//(*testout) << " t " << t << endl;
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}
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double ExtrusionFace :: CalcProj(const Point<3> & point3d, Point<2> & point2d,
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const int seg) const
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{
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double t(-1);
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if(line_path[seg])
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{
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point2d(0) = (point3d-line_path[seg]->StartPI())*x_dir[seg];
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point2d(1) = (point3d-line_path[seg]->StartPI())*z_dir[seg];
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double l = Dist(line_path[seg]->StartPI(),
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line_path[seg]->EndPI());
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t = min2(max2((point3d - line_path[seg]->StartPI()) * y_dir[seg],0.),
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l);
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p0[seg] = line_path[seg]->StartPI() + t*y_dir[seg];
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t *= 1./l;
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}
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else if(spline3_path[seg])
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{
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spline3_path[seg]->Project(point3d,p0[seg],t);
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y_dir[seg] = spline3_path[seg]->GetTangent(t); y_dir[seg].Normalize();
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loc_z_dir[seg] = z_dir[seg];
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Orthogonalize(y_dir[seg],loc_z_dir[seg]);
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x_dir[seg] = Cross(y_dir[seg],loc_z_dir[seg]);
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Vec<3> dir = point3d-p0[seg];
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point2d(0) = x_dir[seg]*dir;
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point2d(1) = loc_z_dir[seg]*dir;
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}
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return t;
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}
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double ExtrusionFace :: CalcFunctionValue (const Point<3> & point) const
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{
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Point<2> p;
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double dummyd;
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int dummyi;
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CalcProj(point,p,dummyi,dummyd);
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//(*testout) << "spline " << dummyi << " t " << dummyd << endl;
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return profile_spline_coeff(0)*p(0)*p(0) + profile_spline_coeff(1)*p(1)*p(1)
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+ profile_spline_coeff(2)*p(0)*p(1) + profile_spline_coeff(3)*p(0)
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+ profile_spline_coeff(4)*p(1) + profile_spline_coeff(5);
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}
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void ExtrusionFace :: CalcGradient (const Point<3> & point, Vec<3> & grad) const
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{
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int i;
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Point<2> p2d;
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double t_path;
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int seg;
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CalcProj(point,p2d,seg,t_path);
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Point<3> phi;
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Vec<3> phip,phipp,phi_minus_point;
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path->GetSpline(seg).GetDerivatives(t_path,phi,phip,phipp);
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phi_minus_point = phi-point;
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Vec<3> grad_t = phip;
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double facA = phipp*phi_minus_point + phip*phip;
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grad_t *= 1./facA;
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ARRAY < Vec<3> > dphi_dX(3);
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for(i=0; i<3; i++)
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dphi_dX[i] = grad_t(i)*phip;
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ARRAY < Vec<3> > dy_dir_dX(3);
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double lphip = phip.Length();
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dy_dir_dX[0] = dy_dir_dX[1] = dy_dir_dX[2] =
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(1./lphip) * phipp - ((phip*phipp)/pow(lphip,3)) * phip;
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for(i=0; i<3; i++)
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dy_dir_dX[i] *= grad_t(i);
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ARRAY < Vec<3> > dx_dir_dX(3);
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for(i=0; i<3; i++)
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dx_dir_dX[i] = Cross(dy_dir_dX[i],z_dir[seg]);
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Vec<3> grad_xbar;
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for(i=0; i<3; i++)
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grad_xbar(i) = -1.*(phi_minus_point * dx_dir_dX[i]) + x_dir[seg](i) - x_dir[seg] * dphi_dX[i];
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double zy = z_dir[seg]*y_dir[seg];
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Vec<3> grad_ybar;
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Vec<3> aux = z_dir[seg] - zy*y_dir[seg];
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for(i=0; i<3; i++)
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grad_ybar(i) = ( (z_dir[seg]*dy_dir_dX[i])*y_dir[seg] + zy*dy_dir_dX[i] ) * phi_minus_point +
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aux[i] -
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aux * dphi_dX[i];
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const double dFdxbar = 2.*profile_spline_coeff(0)*p2d(0) +
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profile_spline_coeff(2)*p2d(1) + profile_spline_coeff(3);
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const double dFdybar = 2.*profile_spline_coeff(1)*p2d(1) +
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profile_spline_coeff(2)*p2d(0) + profile_spline_coeff(4);
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grad = dFdxbar * grad_xbar + dFdybar * grad_ybar;
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}
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void ExtrusionFace :: CalcHesse (const Point<3> & point, Mat<3> & hesse) const
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{
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const double eps = 1e-7*Dist(path->GetSpline(0).StartPI(),path->GetSpline(0).EndPI());
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/*
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Point<3> auxpoint1(point),auxpoint2(point);
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Vec<3> auxvec,auxgrad1,auxgrad2;
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for(int i=0; i<3; i++)
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{
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auxpoint1(i) -= eps;
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auxpoint2(i) += eps;
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CalcGradient(auxpoint1,auxgrad1);
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CalcGradient(auxpoint2,auxgrad2);
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auxvec = (1./(2.*eps)) * (auxgrad2-auxgrad1);
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for(int j=0; j<3; j++)
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hesse(i,j) = auxvec(j);
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auxpoint1(i) = point(i);
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auxpoint2(i) = point(i);
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}
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*/
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Vec<3> grad;
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CalcGradient(point,grad);
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Point<3> auxpoint(point);
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Vec<3> auxvec,auxgrad;
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for(int i=0; i<3; i++)
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{
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auxpoint(i) -= eps;
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CalcGradient(auxpoint,auxgrad);
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auxvec = (1./eps) * (grad-auxgrad);
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for(int j=0; j<3; j++)
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hesse(i,j) = auxvec(j);
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auxpoint(i) = point(i);
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}
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for(int i=0; i<3; i++)
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for(int j=i+1; j<3; j++)
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hesse(i,j) = hesse(j,i) = 0.5*(hesse(i,j)+hesse(j,i));
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}
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double ExtrusionFace :: HesseNorm () const
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{
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return fabs(profile_spline_coeff(0) + profile_spline_coeff(1)) +
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sqrt(pow(profile_spline_coeff(0)+profile_spline_coeff(1),2)+4.*pow(profile_spline_coeff(2),2));
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}
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double ExtrusionFace :: MaxCurvature () const
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{
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double retval,actmax;
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retval = profile->MaxCurvature();
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for(int i=0; i<path->GetNSplines(); i++)
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{
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actmax = path->GetSpline(i).MaxCurvature();
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if(actmax > retval)
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retval = actmax;
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}
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return 2.*retval;
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}
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void ExtrusionFace :: Project (Point<3> & p) const
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{
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double dummyt;
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int seg;
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Point<2> p2d;
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CalcProj(p,p2d,seg,dummyt);
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profile->Project(p2d,p2d,profile_par);
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p = p0[seg] + p2d(0)*x_dir[seg] + p2d(1)*loc_z_dir[seg];
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Vec<2> tangent2d = profile->GetTangent(profile_par);
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profile_tangent = tangent2d(0)*x_dir[seg] + tangent2d(1)*y_dir[seg];
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}
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Point<3> ExtrusionFace :: GetSurfacePoint () const
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{
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p0[0] = path->GetSpline(0).GetPoint(0.5);
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if(!line_path[0])
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{
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y_dir[0] = path->GetSpline(0).GetTangent(0.5);
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y_dir[0].Normalize();
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loc_z_dir[0] = z_dir[0];
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Orthogonalize(y_dir[0],loc_z_dir[0]);
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x_dir[0] = Cross(y_dir[0],loc_z_dir[0]);
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}
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Point<2> locpoint = profile->GetPoint(0.5);
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return p0[0] + locpoint(0)*x_dir[0] + locpoint(1)*loc_z_dir[0];
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}
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bool ExtrusionFace :: BoxIntersectsFace(const Box<3> & box) const
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{
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|
Point<3> center = box.Center();
|
|
|
|
Project(center);
|
|
|
|
//(*testout) << "box.Center() " << box.Center() << " projected " << center << " diam " << box.Diam()
|
|
// << " dist " << Dist(box.Center(),center) << endl;
|
|
|
|
return (Dist(box.Center(),center) < 0.5*box.Diam());
|
|
}
|
|
|
|
|
|
void ExtrusionFace :: LineIntersections ( const Point<3> & p,
|
|
const Vec<3> & v,
|
|
const double eps,
|
|
int & before,
|
|
int & after,
|
|
bool & intersecting ) const
|
|
{
|
|
Point<2> p2d;
|
|
Vec<2> v2d;
|
|
|
|
intersecting = false;
|
|
|
|
double segt;
|
|
int seg;
|
|
|
|
CalcProj(p,p2d,seg,segt);
|
|
|
|
if(seg == 0 && segt < 1e-20)
|
|
{
|
|
Vec<3> v1,v2;
|
|
v1 = path->GetSpline(0).GetTangent(0);
|
|
v2 = p-p0[seg];
|
|
if(v1*v2 < -eps)
|
|
return;
|
|
}
|
|
if(seg == path->GetNSplines()-1 && 1.-segt < 1e-20)
|
|
{
|
|
Vec<3> v1,v2;
|
|
v1 = path->GetSpline(seg).GetTangent(1);
|
|
v2 = p-p0[seg];
|
|
if(v1*v2 > eps)
|
|
return;
|
|
}
|
|
|
|
v2d(0) = v * x_dir[seg];
|
|
v2d(1) = v * loc_z_dir[seg];
|
|
|
|
Vec<2> n(v2d(1),-v2d(0));
|
|
ARRAY < Point<2> > ips;
|
|
|
|
|
|
profile->LineIntersections(v2d(1),
|
|
-v2d(0),
|
|
-v2d(1)*p2d(0) + v2d(0)*p2d(1),
|
|
ips,eps);
|
|
int comp;
|
|
|
|
if(fabs(v2d(0)) >= fabs(v2d(1)))
|
|
comp = 0;
|
|
else
|
|
comp = 1;
|
|
|
|
//(*testout) << "p2d " << p2d;
|
|
|
|
for(int i=0; i<ips.Size(); i++)
|
|
{
|
|
//(*testout) << " ip " << ips[i];
|
|
|
|
double t = (ips[i](comp)-p2d(comp))/v2d(comp);
|
|
|
|
if(t < -eps)
|
|
before++;
|
|
else if(t > eps)
|
|
after++;
|
|
else
|
|
intersecting = true;
|
|
}
|
|
//(*testout) << endl;
|
|
}
|
|
|
|
void ExtrusionFace :: Print (ostream & str) const{}
|
|
|
|
INSOLID_TYPE ExtrusionFace :: VecInFace ( const Point<3> & p,
|
|
const Vec<3> & v,
|
|
const double eps ) const
|
|
{
|
|
|
|
Vec<3> normal1;
|
|
CalcGradient(p,normal1); normal1.Normalize();
|
|
|
|
double d1 = normal1*v;
|
|
|
|
|
|
if(d1 > eps)
|
|
return IS_OUTSIDE;
|
|
if(d1 < -eps)
|
|
return IS_INSIDE;
|
|
|
|
|
|
return DOES_INTERSECT;
|
|
|
|
/*
|
|
Point<2> p2d;
|
|
|
|
double t_path;
|
|
int seg;
|
|
CalcProj(p,p2d,seg,t_path);
|
|
|
|
double t;
|
|
profile.Project(p2d,p2d,t);
|
|
|
|
|
|
|
|
Vec<2> profile_tangent = profile.GetTangent(t);
|
|
|
|
double d;
|
|
|
|
Vec<3> normal1;
|
|
CalcGradient(p,normal1); normal1.Normalize();
|
|
|
|
double d1 = normal1*v;
|
|
|
|
Vec<2> v2d;
|
|
|
|
v2d(0) = v*x_dir[seg];
|
|
v2d(1) = v*loc_z_dir[seg];
|
|
|
|
|
|
Vec<2> normal(-profile_tangent(1),profile_tangent(0));
|
|
|
|
//d = normal*v2d;
|
|
|
|
|
|
d = d1;
|
|
|
|
|
|
if(d > eps)
|
|
return IS_OUTSIDE;
|
|
if(d < -eps)
|
|
return IS_INSIDE;
|
|
|
|
|
|
return DOES_INTERSECT;
|
|
*/
|
|
}
|
|
|
|
|
|
void ExtrusionFace :: GetTriangleApproximation (TriangleApproximation & tas,
|
|
const Box<3> & boundingbox,
|
|
double facets) const
|
|
{
|
|
int n = int(facets) + 1;
|
|
|
|
int i,j,k;
|
|
|
|
|
|
int nump = 0;
|
|
for(k=0; k<path->GetNSplines(); k++)
|
|
{
|
|
for(i=0; i<=n; i++)
|
|
{
|
|
Point<3> origin = path->GetSpline(k).GetPoint(double(i)/double(n));
|
|
if(!line_path[k])
|
|
{
|
|
y_dir[k] = path->GetSpline(k).GetTangent(double(i)/double(n));
|
|
y_dir[k].Normalize();
|
|
}
|
|
loc_z_dir[k] = z_dir[k];
|
|
Orthogonalize(y_dir[k],loc_z_dir[k]);
|
|
if(!line_path[k])
|
|
x_dir[k] = Cross(y_dir[k],loc_z_dir[k]);
|
|
|
|
for(j=0; j<=n; j++)
|
|
{
|
|
Point<2> locp = profile->GetPoint(double(j)/double(n));
|
|
tas.AddPoint(origin + locp(0)*x_dir[k] + locp(1)*loc_z_dir[k]);
|
|
nump++;
|
|
}
|
|
}
|
|
}
|
|
|
|
for(k=0; k<path->GetNSplines(); k++)
|
|
for(i=0; i<n; i++)
|
|
for(j=0; j<n; j++)
|
|
{
|
|
int pi = k*(n+1)*(n+1) + (n+1)*i +j;
|
|
|
|
tas.AddTriangle( TATriangle (0, pi,pi+1,pi+n+1));
|
|
tas.AddTriangle( TATriangle (0, pi+1,pi+n+1,pi+n+2));
|
|
}
|
|
}
|
|
|
|
|
|
void ExtrusionFace :: GetRawData(ARRAY<double> & data) const
|
|
{
|
|
data.DeleteAll();
|
|
profile->GetRawData(data);
|
|
path->GetRawData(data);
|
|
for(int i=0; i<3; i++)
|
|
data.Append(glob_z_direction[i]);
|
|
//(*testout) << "written raw data " << data << endl;
|
|
}
|
|
|
|
|
|
|
|
Extrusion :: Extrusion(const SplineGeometry<3> & path_in,
|
|
const SplineGeometry<2> & profile_in,
|
|
const Vec<3> & z_dir) :
|
|
path(path_in), profile(profile_in), z_direction(z_dir)
|
|
{
|
|
surfaceactive.SetSize(0);
|
|
surfaceids.SetSize(0);
|
|
|
|
for(int j=0; j<profile.GetNSplines(); j++)
|
|
{
|
|
ExtrusionFace * face = new ExtrusionFace(&(profile.GetSpline(j)),
|
|
&path,
|
|
z_direction);
|
|
faces.Append(face);
|
|
surfaceactive.Append(true);
|
|
surfaceids.Append(0);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
Extrusion :: ~Extrusion()
|
|
{
|
|
for(int i=0; i<faces.Size(); i++)
|
|
delete faces[i];
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
INSOLID_TYPE Extrusion :: BoxInSolid (const BoxSphere<3> & box) const
|
|
{
|
|
for(int i=0; i<faces.Size(); i++)
|
|
{
|
|
if(faces[i]->BoxIntersectsFace(box))
|
|
return DOES_INTERSECT;
|
|
}
|
|
|
|
return PointInSolid(box.Center(),0);
|
|
}
|
|
|
|
|
|
INSOLID_TYPE Extrusion :: PointInSolid (const Point<3> & p,
|
|
const double eps,
|
|
ARRAY<int> * const facenums) const
|
|
{
|
|
Vec<3> random_vec(-0.4561,0.7382,0.4970247);
|
|
|
|
int before(0), after(0);
|
|
bool intersects(false);
|
|
bool does_intersect(false);
|
|
|
|
for(int i=0; i<faces.Size(); i++)
|
|
{
|
|
faces[i]->LineIntersections(p,random_vec,eps,before,after,intersects);
|
|
|
|
//(*testout) << "intersects " << intersects << " before " << before << " after " << after << endl;
|
|
if(intersects)
|
|
{
|
|
if(facenums)
|
|
{
|
|
facenums->Append(i);
|
|
does_intersect = true;
|
|
}
|
|
else
|
|
return DOES_INTERSECT;
|
|
}
|
|
}
|
|
|
|
if(does_intersect)
|
|
return DOES_INTERSECT;
|
|
|
|
|
|
if(before % 2 == 0)
|
|
return IS_OUTSIDE;
|
|
|
|
return IS_INSIDE;
|
|
}
|
|
|
|
|
|
INSOLID_TYPE Extrusion :: PointInSolid (const Point<3> & p,
|
|
double eps) const
|
|
{
|
|
return PointInSolid(p,eps,NULL);
|
|
}
|
|
|
|
INSOLID_TYPE Extrusion :: VecInSolid (const Point<3> & p,
|
|
const Vec<3> & v,
|
|
double eps) const
|
|
{
|
|
ARRAY<int> facenums;
|
|
INSOLID_TYPE pInSolid = PointInSolid(p,eps,&facenums);
|
|
|
|
if(pInSolid != DOES_INTERSECT)
|
|
return pInSolid;
|
|
|
|
|
|
double d(0);
|
|
|
|
if(facenums.Size() == 1)
|
|
{
|
|
Vec<3> normal;
|
|
faces[facenums[0]]->CalcGradient(p,normal);
|
|
normal.Normalize();
|
|
d = normal*v;
|
|
|
|
latestfacenum = facenums[0];
|
|
}
|
|
else if (facenums.Size() == 2)
|
|
{
|
|
Vec<3> checkvec;
|
|
|
|
Point<3> dummy(p);
|
|
faces[facenums[0]]->Project(dummy);
|
|
if(fabs(faces[facenums[0]]->GetProfilePar()) < 0.1)
|
|
{
|
|
int aux = facenums[0];
|
|
facenums[0] = facenums[1]; facenums[1] = aux;
|
|
}
|
|
|
|
checkvec = faces[facenums[0]]->GetYDir();
|
|
|
|
Vec<3> n0, n1;
|
|
faces[facenums[0]]->CalcGradient(p,n0);
|
|
faces[facenums[1]]->CalcGradient(p,n1);
|
|
n0.Normalize();
|
|
n1.Normalize();
|
|
|
|
|
|
Vec<3> t = Cross(n0,n1);
|
|
if(checkvec*t < 0) t*= (-1.);
|
|
|
|
Vec<3> t0 = Cross(n0,t);
|
|
Vec<3> t1 = Cross(t,n1);
|
|
|
|
t0.Normalize();
|
|
t1.Normalize();
|
|
|
|
|
|
const double t0v = t0*v;
|
|
const double t1v = t1*v;
|
|
|
|
if(t0v > t1v)
|
|
{
|
|
latestfacenum = facenums[0];
|
|
d = n0*v;
|
|
}
|
|
else
|
|
{
|
|
latestfacenum = facenums[1];
|
|
d = n1*v;
|
|
}
|
|
|
|
if(fabs(t0v) < eps && fabs(t1v) < eps)
|
|
latestfacenum = -1;
|
|
}
|
|
|
|
else
|
|
{
|
|
cerr << "WHY ARE THERE " << facenums.Size() << " FACES?" << endl;
|
|
}
|
|
|
|
if(d > eps)
|
|
return IS_OUTSIDE;
|
|
if(d < -eps)
|
|
return IS_INSIDE;
|
|
|
|
return DOES_INTERSECT;
|
|
}
|
|
|
|
|
|
|
|
// checks if lim s->0 lim t->0 p + t(v1 + s v2) in solid
|
|
INSOLID_TYPE Extrusion :: VecInSolid2 (const Point<3> & p,
|
|
const Vec<3> & v1,
|
|
const Vec<3> & v2,
|
|
double eps) const
|
|
{
|
|
INSOLID_TYPE retval;
|
|
retval = VecInSolid(p,v1,eps);
|
|
|
|
// *testout << "extr, vecinsolid=" << int(retval) << endl;
|
|
|
|
if(retval != DOES_INTERSECT)
|
|
return retval;
|
|
|
|
if(latestfacenum >= 0)
|
|
return faces[latestfacenum]->VecInFace(p,v2,0);
|
|
else
|
|
return VecInSolid(p,v2,eps);
|
|
}
|
|
|
|
|
|
int Extrusion :: GetNSurfaces() const
|
|
{
|
|
return faces.Size();
|
|
}
|
|
|
|
Surface & Extrusion :: GetSurface (int i)
|
|
{
|
|
return *faces[i];
|
|
}
|
|
|
|
const Surface & Extrusion :: GetSurface (int i) const
|
|
{
|
|
return *faces[i];
|
|
}
|
|
|
|
|
|
void Extrusion :: Reduce (const BoxSphere<3> & box)
|
|
{
|
|
for(int i=0; i<faces.Size(); i++)
|
|
surfaceactive[i] = faces[i]->BoxIntersectsFace(box);
|
|
}
|
|
|
|
void Extrusion :: UnReduce ()
|
|
{
|
|
for(int i=0; i<faces.Size(); i++)
|
|
surfaceactive[i] = true;
|
|
}
|
|
|
|
|
|
}
|