mirror of
https://github.com/NGSolve/netgen.git
synced 2024-09-22 17:52:50 +05:00
931 lines
20 KiB
C++
931 lines
20 KiB
C++
#include <mystdlib.h>
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#include <core/register_archive.hpp>
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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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NgArray<Point<3> > project1, project2;
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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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double cum_angle = 0.;
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for(auto i : Range(path->GetSplines()))
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{
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const auto& sp = path->GetSpline(i);
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auto t1 = sp.GetTangent(0.);
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t1.Normalize();
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auto t2 = sp.GetTangent(1.);
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t2.Normalize();
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cum_angle += acos(t1 * t2);
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angles.Append(cum_angle);
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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 NgArray<double> & raw_data)
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{
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deletable = true;
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int pos=0;
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NgArray< 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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}
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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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}
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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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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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static mutex set_latest_point;
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auto eps = 1e-25 * Dist2(path->GetSpline(0).StartPI(), path->GetSpline(0).EndPI());
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if (Dist2 (point3d, latest_point3d) < eps)
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{
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std::lock_guard<std::mutex> guard(set_latest_point);
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if (Dist2 (point3d, latest_point3d) < eps)
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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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}
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double cutdist = -1;
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NgArray<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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// lower bound for dist
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auxmin = sqrt (MinDistTP2 (startp, endp, tanp, point3d));
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// upper bound for dist
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auxcut = min2 (Dist (startp, point3d), Dist (endp, point3d));
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}
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else if(line_path[i])
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{
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auxmin = auxcut = sqrt (MinDistLP2 (path->GetSpline(i).StartPI(),
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path->GetSpline(i).EndPI(),
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point3d));
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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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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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for(int i=0; i<path->GetNSplines(); i++)
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{
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if(mindist[i] > cutdist*(1+1e-10)) continue;
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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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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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}
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}
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std::lock_guard<std::mutex> guard(set_latest_point);
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latest_seg = seg;
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latest_t = t;
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latest_point2d = point2d;
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latest_point3d = point3d;
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}
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double ExtrusionFace :: CalcProj(const Point<3> & point3d, Point<2> & point2d,
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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);
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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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return
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profile_spline_coeff(0)*p(0)*p(0) +
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profile_spline_coeff(1)*p(1)*p(1) +
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profile_spline_coeff(2)*p(0)*p(1) +
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profile_spline_coeff(3)*p(0) +
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profile_spline_coeff(4)*p(1) +
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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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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 = (1.0/(phipp*phi_minus_point + phip*phip)) * phip;
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Vec<3> grad_xbar, grad_ybar;
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Vec<3> hex, hey, hez, dex, dey, dez;
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CalcLocalCoordinatesDeriv (seg, t_path, hex, hey, hez, dex, dey, dez);
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grad_xbar = hex - (phi_minus_point*dex + hex*phip) * grad_t;
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grad_ybar = hez - (phi_minus_point*dez + hez*phip) * grad_t;
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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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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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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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*/
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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();
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Project(center);
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//(*testout) << "box.Center() " << box.Center() << " projected " << center << " diam " << box.Diam()
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// << " dist " << Dist(box.Center(),center) << endl;
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return (Dist(box.Center(),center) < 0.5*box.Diam());
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}
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bool ExtrusionFace :: PointInFace (const Point<3> & p, const double eps) const
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{
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Point<3> hp = p;
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Project(hp);
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return Dist2(p,hp) < sqr(eps);
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}
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void ExtrusionFace :: LineIntersections ( const Point<3> & p,
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const Vec<3> & v,
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const double eps,
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int & before,
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int & after,
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bool & intersecting ) const
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{
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Point<2> p2d;
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Vec<2> v2d;
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intersecting = false;
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double segt;
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int seg;
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CalcProj(p,p2d,seg,segt);
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if(seg == 0 && segt < 1e-20)
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{
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Vec<3> v1,v2;
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v1 = path->GetSpline(0).GetTangent(0);
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v2 = p-p0[seg];
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if(v1*v2 < -eps)
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return;
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}
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if(seg == path->GetNSplines()-1 && 1.-segt < 1e-20)
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{
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Vec<3> v1,v2;
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v1 = path->GetSpline(seg).GetTangent(1);
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v2 = p-p0[seg];
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if(v1*v2 > eps)
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return;
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}
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v2d(0) = v * x_dir[seg];
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v2d(1) = v * loc_z_dir[seg];
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Vec<2> n(v2d(1),-v2d(0));
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NgArray < Point<2> > ips;
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profile->LineIntersections(v2d(1),
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-v2d(0),
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-v2d(1)*p2d(0) + v2d(0)*p2d(1),
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ips,eps);
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int comp;
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if(fabs(v2d(0)) >= fabs(v2d(1)))
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comp = 0;
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else
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comp = 1;
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//(*testout) << "p2d " << p2d;
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for(int i=0; i<ips.Size(); i++)
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{
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//(*testout) << " ip " << ips[i];
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double t = (ips[i](comp)-p2d(comp))/v2d(comp);
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if(t < -eps)
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before++;
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else if(t > eps)
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after++;
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else
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intersecting = true;
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}
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//(*testout) << endl;
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}
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void ExtrusionFace :: Print (ostream & str) const{}
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INSOLID_TYPE ExtrusionFace :: VecInFace ( const Point<3> & p,
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const Vec<3> & v,
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const double eps ) const
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{
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Vec<3> normal1;
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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;
|
|
|
|
for(int k = 0; k < path -> GetNSplines(); k++)
|
|
{
|
|
for(int 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(int 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]);
|
|
}
|
|
}
|
|
}
|
|
|
|
for(int k = 0; k < path->GetNSplines(); k++)
|
|
for(int i = 0; i < n; i++)
|
|
for(int 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(NgArray<double> & data) const
|
|
{
|
|
data.DeleteAll();
|
|
profile->GetRawData(data);
|
|
path->GetRawData(data);
|
|
for(int i=0; i<3; i++)
|
|
data.Append(glob_z_direction[i]);
|
|
}
|
|
|
|
|
|
void ExtrusionFace ::
|
|
CalcLocalCoordinates (int seg, double t,
|
|
Vec<3> & ex, Vec<3> & ey, Vec<3> & ez) const
|
|
{
|
|
ey = path->GetSpline(seg).GetTangent(t);
|
|
ey /= ey.Length();
|
|
ex = Cross (ey, glob_z_direction);
|
|
ex /= ex.Length();
|
|
ez = Cross (ex, ey);
|
|
}
|
|
|
|
void ExtrusionFace ::
|
|
CalcLocalCoordinatesDeriv (int seg, double t,
|
|
Vec<3> & ex, Vec<3> & ey, Vec<3> & ez,
|
|
Vec<3> & dex, Vec<3> & dey, Vec<3> & dez) const
|
|
{
|
|
Point<3> point;
|
|
Vec<3> first, second;
|
|
path->GetSpline(seg).GetDerivatives (t, point, first, second);
|
|
|
|
ey = first;
|
|
ex = Cross (ey, glob_z_direction);
|
|
ez = Cross (ex, ey);
|
|
|
|
dey = second;
|
|
dex = Cross (dey, glob_z_direction);
|
|
dez = Cross (dex, ey) + Cross (ex, dey);
|
|
|
|
double lenx = ex.Length();
|
|
double leny = ey.Length();
|
|
double lenz = ez.Length();
|
|
|
|
ex /= lenx;
|
|
ey /= leny;
|
|
ez /= lenz;
|
|
|
|
dex /= lenx;
|
|
dex -= (dex * ex) * ex;
|
|
|
|
dey /= leny;
|
|
dey -= (dey * ey) * ey;
|
|
|
|
dez /= lenz;
|
|
dez -= (dez * ez) * ez;
|
|
}
|
|
|
|
void ExtrusionFace :: DefineTangentialPlane(const Point<3>& ap1,
|
|
const Point<3>& ap2)
|
|
{
|
|
Surface::DefineTangentialPlane(ap1, ap2);
|
|
tangential_plane_seg = latest_seg;
|
|
}
|
|
|
|
void ExtrusionFace :: ToPlane(const Point<3>& p3d, Point<2>& p2d,
|
|
double h, int& zone) const
|
|
{
|
|
Surface::ToPlane(p3d, p2d, h, zone);
|
|
double angle = angles[tangential_plane_seg] - angles[latest_seg];
|
|
if(fabs(angle) > 3.14/2.)
|
|
zone = -1;
|
|
}
|
|
|
|
Extrusion :: Extrusion(shared_ptr<SplineGeometry<3>> path_in,
|
|
shared_ptr<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.get(),
|
|
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,
|
|
NgArray<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);
|
|
}
|
|
|
|
void Extrusion :: GetTangentialSurfaceIndices (const Point<3> & p,
|
|
NgArray<int> & surfind, double eps) const
|
|
{
|
|
for (int j = 0; j < faces.Size(); j++)
|
|
if (faces[j] -> PointInFace(p, eps))
|
|
if (!surfind.Contains (GetSurfaceId(j)))
|
|
surfind.Append (GetSurfaceId(j));
|
|
}
|
|
|
|
|
|
INSOLID_TYPE Extrusion :: VecInSolid (const Point<3> & p,
|
|
const Vec<3> & v,
|
|
double eps) const
|
|
{
|
|
NgArray<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,eps);
|
|
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;
|
|
}
|
|
|
|
RegisterClassForArchive<ExtrusionFace, Surface> regexf;
|
|
RegisterClassForArchive<Extrusion, Primitive> regextr;
|
|
}
|