netgen/libsrc/geom2d/geom2dmesh.cpp
2018-12-06 17:53:44 +01:00

120 lines
3.3 KiB
C++

#include <meshing.hpp>
#include <geometry2d.hpp>
namespace netgen
{
Refinement2d :: Refinement2d (const SplineGeometry2d & ageometry)
: Refinement(), geometry(ageometry)
{
;
}
Refinement2d :: ~Refinement2d ()
{
;
}
void Refinement2d ::
PointBetween (const Point<3> & p1, const Point<3> & p2, double secpoint,
int surfi,
const PointGeomInfo & gi1,
const PointGeomInfo & gi2,
Point<3> & newp, PointGeomInfo & newgi) const
{
newp = p1+secpoint*(p2-p1);
newgi.trignum = 1;
}
void Refinement2d ::
PointBetween (const Point<3> & p1, const Point<3> & p2, double secpoint,
int surfi1, int surfi2,
const EdgePointGeomInfo & ap1,
const EdgePointGeomInfo & ap2,
Point<3> & newp, EdgePointGeomInfo & newgi) const
{
Point<2> p2d;
double newdist;
auto spline = geometry.GetSplines().Get(ap1.edgenr);
if( (ap1.dist == 0.0) && (ap2.dist == 0.0) )
{
// used for manually generated meshes
const SplineSeg3<2> * ss3;
const LineSeg<2> * ls;
auto ext = dynamic_cast<const SplineSegExt *>(spline);
if(ext)
{
ss3 = dynamic_cast<const SplineSeg3<2> *>(ext->seg);
ls = dynamic_cast<const LineSeg<2> *>(ext->seg);
}
else
{
ss3 = dynamic_cast<const SplineSeg3<2> *>(spline);
ls = dynamic_cast<const LineSeg<2> *>(spline);
}
Point<2> p12d(p1(0),p1(1)), p22d(p2(0),p2(1));
Point<2> p1_proj(0.0,0.0), p2_proj(0.0,0.0);
double t1_proj = 0.0;
double t2_proj = 0.0;
if(ss3)
{
ss3->Project(p12d,p1_proj,t1_proj);
ss3->Project(p22d,p2_proj,t2_proj);
}
else if(ls)
{
ls->Project(p12d,p1_proj,t1_proj);
ls->Project(p22d,p2_proj,t2_proj);
}
p2d = spline->GetPoint (((1-secpoint)*t1_proj+secpoint*t2_proj));
newdist = (1-secpoint)*t1_proj+secpoint*t2_proj;
}
else
{
p2d = spline->GetPoint (((1-secpoint)*ap1.dist+secpoint*ap2.dist));
newdist = (1-secpoint)*ap1.dist+secpoint*ap2.dist;
}
// (*testout) << "refine 2d line, ap1.dist, ap2.dist = " << ap1.dist << ", " << ap2.dist << endl;
// (*testout) << "p1, p2 = " << p1 << p2 << ", newp = " << p2d << endl;
newp = Point3d (p2d(0), p2d(1), 0);
newgi.edgenr = ap1.edgenr;
newgi.dist = newdist;
};
Vec<3> Refinement2d :: GetTangent (const Point<3> & p, int surfi1, int surfi2,
const EdgePointGeomInfo & ap1) const
{
Vec<2> t2d = geometry.GetSplines().Get(ap1.edgenr) -> GetTangent(ap1.dist);
return Vec<3> (t2d(0), t2d(1), 0);
}
Vec<3> Refinement2d :: GetNormal (const Point<3> & p, int surfi1,
const PointGeomInfo & gi) const
{
return Vec<3> (0,0,1);
}
void Refinement2d :: ProjectToSurface (Point<3> & p, int surfi, const PointGeomInfo & /* gi */) const
{
p(2) = 0;
}
void Refinement2d :: ProjectToEdge (Point<3> & p, int surfi1, int surfi2,
const EdgePointGeomInfo & egi) const
{
Point<2> p2d (p(0), p(1)), pp;
double t;
geometry.GetSplines().Get(egi.edgenr) -> Project (p2d, pp, t);
p = Point<3> (pp(0), pp(1), 0);
}
}