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bug fix PointContainedIn2DElement

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This commit is contained in:
Michael Neunteufel 2016-11-27 19:25:25 +01:00
parent a2f434ebbf
commit f65651ce0e
1 changed files with 43 additions and 24 deletions
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39
libsrc/meshing/meshclass.cpp
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@ -4320,12 +4320,19 @@ namespace netgen
double dxa = d.X()*a.Y()-d.Y()*a.X();
double dxp = d.X()*p.Y()-d.Y()*p.X();
double c0,c1,c2; // ,rt;
lami[2]=0.;
double eps = 1.E-12;
Vec3d dp13 = p3-p1;
Vec3d dp24 = p4-p2;
double d1 = dp13.Length2();
double d2 = dp24.Length2();
// if(fabs(d.X()) <= eps && fabs(d.Y())<= eps)
if (d.Length2() < sqr(eps))
//if (d.Length2() < sqr(eps))
if (d.Length2() < sqr(eps)*d1 && d.Length2() < sqr(eps)*d2)
{
//Solve Linear System
@ -4341,45 +4348,57 @@ namespace netgen
*/
}
else
if(fabs(dxb) <= eps)
//if(fabs(dxb) <= eps)
if(fabs(dxb) <= eps*fabs(dxc))
{
lami[1] = (dxp-dxa)/dxc;
if(fabs(b.X()-d.X()*lami[1])>=eps)
//if(fabs(b.X()-d.X()*lami[1])>=eps)
if(fabs(b.X()+d.X()*lami[1])>=fabs(b.Y()+d.Y()*lami[1]))
lami[0] = (p.X()-a.X() - c.X()*lami[1])/(b.X()+d.X()*lami[1]);
else
lami[0] = (p.Y()-a.Y() - c.Y()*lami[1])/(b.Y()+d.Y()*lami[1]);
}
else
if(fabs(dxc) <= eps)
//if(fabs(dxc) <= eps)
if(fabs(dxc) <= eps*fabs(dxb))
{
lami[0] = (dxp-dxa)/dxb;
if(fabs(c.X()-d.X()*lami[0])>=eps)
//if(fabs(c.X()-d.X()*lami[0])>=eps)
if(fabs(c.X()+d.X()*lami[0])>=fabs(c.Y()+d.Y()*lami[0]))
lami[1] = (p.X()-a.X() - b.X()*lami[0])/(c.X()+d.X()*lami[0]);
else
lami[1] = (p.Y()-a.Y() - b.Y()*lami[0])/(c.Y()+d.Y()*lami[0]);
}
else //Solve quadratic equation
{
if(fabs(d.X()) >= eps)
//if(fabs(d.X()) >= eps)
if(fabs(d.X()) >= fabs(d.Y()))
{
c2 = d.X()*dxc;
c1 = d.X()*dxc - c.X()*dxb - d.X()*(dxp-dxa);
//c1 = d.X()*dxc - c.X()*dxb - d.X()*(dxp-dxa);
c1 = b.X()*dxc - c.X()*dxb - d.X()*(dxp-dxa);
c0 = -b.X()*(dxp -dxa) - (a.X()-p.X())*dxb;
}
else
{
c2 = d.Y()*dxc;
c1 = d.Y()*dxc - c.Y()*dxb - d.Y()*(dxp-dxa);
//c1 = d.Y()*dxc - c.Y()*dxb - d.Y()*(dxp-dxa);
c1 = b.Y()*dxc - c.Y()*dxb - d.Y()*(dxp-dxa);
c0 = -b.Y()*(dxp -dxa) - (a.Y()-p.Y())*dxb;
}
double rt = c1*c1 - 4*c2*c0;
if (rt < 0.) return false;
lami[1] = (-c1 + sqrt(rt))/2/c2;
if(lami[1]<=1. && lami[1]>=0.)
if(lami[1]<=1.+eps && lami[1]>=0.-eps)
{
lami[0] = (dxp - dxa -dxc*lami[1])/dxb;
if(lami[0]<=1. && lami[0]>=0.)
if(lami[0]<=1.+eps && lami[0]>=0.-eps)
return true;
}