mirror of
https://github.com/NGSolve/netgen.git
synced 2024-12-24 21:10:33 +05:00
extrusion
This commit is contained in:
Joachim Schoeberl
parent
08ea2e9639
commit
6222d32e34
@ -125,31 +125,9 @@ namespace netgen
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}
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#define NEWJS
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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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#ifdef NEWJS
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// JS Version
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double mindist = 0;
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for (int i = 0; i < path->GetNSplines(); i++)
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{
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Point<2> hpoint2d;
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double ht = CalcProj (point3d, hpoint2d, i);
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double hdist = Dist2(point3d, p0[i]);
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if (i == 0 || hdist < mindist)
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{
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seg = i;
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t = ht;
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mindist = hdist;
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point2d = hpoint2d;
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latest_seg = i;
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}
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}
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return;
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#endif
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#ifdef OLDWM
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if (Dist2 (point3d, latest_point3d) <
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1e-25 * Dist2(path->GetSpline(0).StartPI(), path->GetSpline(0).EndPI()))
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{
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@ -176,6 +154,8 @@ namespace netgen
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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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/*
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double da,db,dc;
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Vec<3> dir = endp-startp;
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@ -212,15 +192,28 @@ namespace netgen
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else
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dc = sqrt(topoint.Length2() - s*s);
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// da = sqrt (MinDistLP2 (startp, endp, point3d));
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// db = sqrt (MinDistLP2 (startp, tanp, point3d));
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// dc = sqrt (MinDistLP2 (endp, tanp, point3d));
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auxmin = min3(da,db,dc);
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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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*/
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auxmin = min3(da,db,dc);
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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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/*
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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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@ -232,19 +225,18 @@ namespace netgen
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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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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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double d1 = Dist2(point3d,path.GetSpline(i).StartPI());
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double d2 = Dist2(point3d,path.GetSpline(i).EndPI());
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@ -278,7 +270,6 @@ namespace netgen
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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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@ -300,7 +291,6 @@ namespace netgen
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}
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//(*testout) << endl;
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//(*testout) << " t " << t << endl;
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#endif
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}
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double ExtrusionFace :: CalcProj(const Point<3> & point3d, Point<2> & point2d,
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@ -335,6 +325,8 @@ namespace netgen
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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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@ -342,60 +334,58 @@ namespace netgen
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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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CalcProj(point, p, dummyi, dummyd);
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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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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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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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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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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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Vec<3> grad_t = (1.0/(phipp*phi_minus_point + phip*phip)) * phip;
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grad_t *= 1./facA;
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Vec<3> dphi_dX[3];
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Vec<3> dy_dir_dX[3];
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Vec<3> dx_dir_dX[3];
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Array < Vec<3> > dphi_dX(3);
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for(i=0; i<3; i++)
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for(int 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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Vec<3> dy_dir_dt = (1./lphip) * phipp - ((phip*phipp)/pow(lphip,3)) * phip;
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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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Vec<3> dx_dir_dt = Cross(dy_dir_dt,z_dir[seg]);
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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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for(int i = 0; i < 3; i++)
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dy_dir_dX[i] = grad_t(i) * dy_dir_dt;
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for(int i = 0; i < 3; i++)
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dx_dir_dX[i] = grad_t(i) * dx_dir_dt;
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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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for(int 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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@ -403,20 +393,81 @@ namespace netgen
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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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for(int 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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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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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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{
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cout << "grad_xbar = " << grad_xbar << endl;
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cout << "grad_ybar = " << grad_ybar << endl;
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Vec<3> numgradx, numgrady;
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for (int i = 0; i < 3; i++)
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{
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Point<3> hpl = point, hpr = point;
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hpl(i) -= 1e-6; hpr(i) += 1e-6;
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Point<2> p2dl, p2dr;
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CalcProj (hpl, p2dl, seg, t_path);
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CalcProj (hpr, p2dr, seg, t_path);
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numgradx(i) = (p2dr(0)-p2dl(0)) / (2e-6);
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numgrady(i) = (p2dr(1)-p2dl(1)) / (2e-6);
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}
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cout << "num grad_xbar" << numgradx << endl;
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cout << "num grad_ybar" << numgrady << endl;
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}
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{
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cout << "grad = " << grad << " =?= ";
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Vec<3> numgrad;
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for (int i = 0; i < 3; i++)
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{
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Point<3> hpl = point;
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Point<3> hpr = point;
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hpl(i) -= 1e-6;
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hpr(i) += 1e-6;
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double vall = CalcFunctionValue (hpl);
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double valr = CalcFunctionValue (hpr);
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numgrad(i) = (valr - vall) / (2e-6);
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}
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cout << " numgrad = " << numgrad << endl;
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for (int i = 0; i < 3; i++)
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{
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Point<3> hpl = point;
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Point<3> hpr = point;
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hpl(i) -= 1e-4;
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hpr(i) += 1e-4;
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double vall = CalcFunctionValue (hpl);
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double valr = CalcFunctionValue (hpr);
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numgrad(i) = (valr - vall) / (2e-4);
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}
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cout << " numgrad2 = " << numgrad << endl;
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}
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static int cnt = 0;
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cnt++;
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if (cnt == 10000)
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exit (0);
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*/
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}
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void ExtrusionFace :: CalcHesse (const Point<3> & point, Mat<3> & hesse) const
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@ -534,7 +585,7 @@ namespace netgen
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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) < 1*box.Diam());
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return (Dist(box.Center(),center) < 0.5*box.Diam());
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}
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@ -16,8 +16,8 @@
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*/
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#undef DEVELOP
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//#define DEVELOP
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// #undef DEVELOP
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// #define DEVELOP
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namespace netgen
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@ -36,9 +36,9 @@ namespace netgen
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template<int D>
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void SplineSeg3<D> :: Project (const Point<D> point, Point<D> & point_on_curve, double & t) const
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{
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template<int D>
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void SplineSeg3<D> :: Project (const Point<D> point, Point<D> & point_on_curve, double & t) const
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{
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double t_old = -1;
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if(proj_latest_t > 0. && proj_latest_t < 1.)
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@ -193,7 +193,65 @@ void SplineSeg3<D> :: Project (const Point<D> point, Point<D> & point_on_curve,
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cout << "dist trivial = " << Dist(point, hp) << endl;
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}
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*/
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}
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}
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template<int D>
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void SplineSeg3<D> :: GetDerivatives (const double t,
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Point<D> & point,
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Vec<D> & first,
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Vec<D> & second) const
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{
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Vec<D> v1(p1), v2(p2), v3(p3);
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double b1 = (1.-t)*(1.-t);
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double b2 = sqrt(2.)*t*(1.-t);
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double b3 = t*t;
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double w = b1+b2+b3;
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b1 *= 1./w; b2 *= 1./w; b3 *= 1./w;
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double b1p = 2.*(t-1.);
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double b2p = sqrt(2.)*(1.-2.*t);
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double b3p = 2.*t;
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const double wp = b1p+b2p+b3p;
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const double fac1 = wp/w;
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b1p *= 1./w; b2p *= 1./w; b3p *= 1./w;
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const double b1pp = 2.;
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const double b2pp = -2.*sqrt(2.);
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const double b3pp = 2.;
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const double wpp = b1pp+b2pp+b3pp;
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const double fac2 = (wpp*w-2.*wp*wp)/(w*w);
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for(int i=0; i<D; i++)
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point(i) = b1*p1(i) + b2*p2(i) + b3*p3(i);
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first = (b1p - b1*fac1) * v1 +
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(b2p - b2*fac1) * v2 +
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(b3p - b3*fac1) * v3;
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/*
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second = (b1pp/w - b1p*fac1 - b1*fac2) * v1 +
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(b2pp/w - b2p*fac1 - b2*fac2) * v2 +
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(b3pp/w - b3p*fac1 - b3*fac2) * v3;
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*/
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// JS: 2 was missing
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second = (b1pp/w - 2*b1p*fac1 - b1*fac2) * v1 +
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(b2pp/w - 2*b2p*fac1 - b2*fac2) * v2 +
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(b3pp/w - 2*b3p*fac1 - b3*fac2) * v3;
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}
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template class SplineSeg3<2>;
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@ -566,47 +566,6 @@ inline Point<D> SplineSeg3<D> :: GetPoint (double t) const
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template<int D>
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void SplineSeg3<D> :: GetDerivatives (const double t,
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Point<D> & point,
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Vec<D> & first,
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Vec<D> & second) const
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{
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Vec<D> v1(p1), v2(p2), v3(p3);
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double b1 = (1.-t)*(1.-t);
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double b2 = sqrt(2.)*t*(1.-t);
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double b3 = t*t;
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double w = b1+b2+b3;
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b1 *= 1./w; b2 *= 1./w; b3 *= 1./w;
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double b1p = 2.*(t-1.);
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double b2p = sqrt(2.)*(1.-2.*t);
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double b3p = 2.*t;
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const double wp = b1p+b2p+b3p;
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const double fac1 = wp/w;
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b1p *= 1./w; b2p *= 1./w; b3p *= 1./w;
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const double b1pp = 2.;
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const double b2pp = -2.*sqrt(2.);
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const double b3pp = 2.;
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const double wpp = b1pp+b2pp+b3pp;
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const double fac2 = (wpp*w-2.*wp*wp)/(w*w);
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for(int i=0; i<D; i++)
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point(i) = b1*p1(i) + b2*p2(i) + b3*p3(i);
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first = (b1p - b1*fac1) * v1 +
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(b2p - b2*fac1) * v2 +
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(b3p - b3*fac1) * v3;
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second = (b1pp/w - b1p*fac1 - b1*fac2) * v1 +
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(b2pp/w - b2p*fac1 - b2*fac2) * v2 +
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(b3pp/w - b3p*fac1 - b3*fac2) * v3;
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}
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template<int D>
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Vec<D> SplineSeg3<D> :: GetTangent (const double t) const
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@ -65,14 +65,17 @@ extern double ComputeCylinderRadius (const Point3d & p1, const Point3d & p2,
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extern double ComputeCylinderRadius (const Vec3d & n1, const Vec3d & n2,
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double h1, double h2);
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/// Minimal distance of point p to the line segment [lp1,lp2]
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||||
extern double MinDistLP2 (const Point2d & lp1, const Point2d & lp2, const Point2d & p);
|
||||
|
||||
/// Minimal distance of point p to the line segment [lp1,lp2]
|
||||
extern double MinDistLP2 (const Point3d & lp1, const Point3d & lp2, const Point3d & p);
|
||||
|
||||
/// Minimal distance of point p to the triangle segment [tp1,tp2,pt3]
|
||||
extern double MinDistTP2 (const Point3d & tp1, const Point3d & tp2,
|
||||
const Point3d & tp3, const Point3d & p);
|
||||
|
||||
/// Minimal distance of the 2 lines [l1p1,l1p2] and [l2p1,l2p2]
|
||||
extern double MinDistLL2 (const Point3d & l1p1, const Point3d & l1p2,
|
||||
const Point3d & l2p1, const Point3d & l2p2);
|
||||
|
||||
|
||||
@ -443,3 +443,18 @@ extern "C" {
|
||||
DLL_HEADER int Ng_GetElementClosureNodes (int dim, int elementnr, int nodeset, int * nodes);
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
#include <iostream>
|
||||
namespace netgen
|
||||
{
|
||||
DLL_HEADER extern std::ostream * testout;
|
||||
DLL_HEADER extern int printmessage_importance;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user