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mesh smoothing

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This commit is contained in:
Joachim Schoeberl 2009-07-22 16:05:58 +00:00
parent f3043d2df9
commit 6d6b60fffe
2 changed files with 59 additions and 63 deletions
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33
libsrc/linalg/vector.hpp
View File

@ -82,14 +82,16 @@ public:
class Vector : public FlatVector
{
bool ownmem;
public:
Vector ()
{ s = 0; data = 0; }
{ s = 0; data = 0; ownmem = false; }
Vector (int as)
{ s = as; data = new double[s]; }
{ s = as; data = new double[s]; ownmem = true; }
Vector (int as, double * mem)
{ s = as; data = mem; ownmem = false; }
~Vector ()
{ delete [] data; }
{ if (ownmem) delete [] data; }
Vector & operator= (const FlatVector & v)
{ memcpy (data, &v(0), s*sizeof(double)); return *this; }
@ -105,13 +107,34 @@ public:
if (s != as)
{
s = as;
delete [] data;
if (ownmem) delete [] data;
data = new double [s];
ownmem = true;
}
}
};
template <int S>
class VectorMem : public Vector
{
double mem[S];
public:
VectorMem () : Vector(S, &mem[0]) { ; }
VectorMem & operator= (const FlatVector & v)
{ memcpy (data, &v(0), S*sizeof(double)); return *this; }
VectorMem & operator= (double scal)
{
for (int i = 0; i < S; i++) data[i] = scal;
return *this;
}
};
inline double operator* (const FlatVector & v1, const FlatVector & v2)
{

89
libsrc/meshing/smoothing3.cpp
View File

@ -23,7 +23,8 @@ namespace netgen
void MinFunctionSum :: Grad (const Vector & x, Vector & g) const
{
g = 0.;
static Vector gi(3);
// static Vector gi(3);
VectorMem<3> gi;
for(int i=0; i<functions.Size(); i++)
{
functions[i]->Grad(x,gi);
@ -120,8 +121,12 @@ namespace netgen
double PointFunction1 ::
FuncDeriv (const Vector & x, const Vector & dir, double & deriv) const
{
/*
static Vector hx(3);
static double eps = 1e-6;
*/
VectorMem<3> hx;
const double eps = 1e-6;
double dirlen = dir.L2Norm();
if (dirlen < 1e-14)
@ -304,7 +309,7 @@ namespace netgen
public:
Mesh::T_POINTS & points;
const Mesh::T_VOLELEMENTS & elements;
TABLE<INDEX,PointIndex::BASE> elementsonpoint;
TABLE<int,PointIndex::BASE> elementsonpoint;
PointIndex actpind;
double h;
@ -327,15 +332,10 @@ namespace netgen
const Mesh::T_VOLELEMENTS & aelements)
: points(apoints), elements(aelements), elementsonpoint(apoints.Size())
{
INDEX i;
int j;
for (i = 1; i <= elements.Size(); i++)
{
if (elements.Get(i).NP() == 4)
for (j = 1; j <= elements.Get(i).NP(); j++)
elementsonpoint.Add (elements.Get(i).PNum(j), i);
}
for (int i = 0; i < elements.Size(); i++)
if (elements[i].NP() == 4)
for (int j = 0; j < elements[i].NP(); j++)
elementsonpoint.Add (elements[i][j], i);
}
void PointFunction :: SetPointIndex (PointIndex aactpind)
@ -345,11 +345,7 @@ namespace netgen
double PointFunction :: PointFunctionValue (const Point<3> & pp) const
{
int j;
INDEX eli;
const Element * el;
double badness;
// Array<const Point3d*> p(4);
Point<3> hp;
badness = 0;
@ -357,14 +353,11 @@ namespace netgen
hp = points[actpind];
points[actpind] = Point<3> (pp);
for (j = 0; j < elementsonpoint[actpind].Size(); j++)
for (int j = 0; j < elementsonpoint[actpind].Size(); j++)
{
eli = elementsonpoint[actpind][j];
el = &elements.Get(eli);
badness += CalcTetBadness (points[el->PNum(1)],
points[el->PNum(2)],
points[el->PNum(3)],
points[el->PNum(4)], -1);
const Element & el = elements[elementsonpoint[actpind][j]];
badness += CalcTetBadness (points[el[0]], points[el[1]],
points[el[2]], points[el[3]], -1);
}
points[actpind] = Point<3> (hp);
@ -375,28 +368,22 @@ namespace netgen
double PointFunction :: PointFunctionValueGrad (const Point<3> & pp, Vec<3> & grad) const
{
double f = 0;
// f = PointFunctionValue (pp);
Point<3> hp;
Point<3> hp = points[actpind];
Vec<3> vgradi, vgrad(0,0,0);
hp = points[actpind];
points[actpind] = Point<3> (pp);
for (int j = 0; j < elementsonpoint[actpind].Size(); j++)
{
INDEX eli = elementsonpoint[actpind][j];
const Element & el = elements.Get(eli);
for (int k = 1; k <= 4; k++)
if (el.PNum(k) == actpind)
const Element & el = elements[elementsonpoint[actpind][j]];
for (int k = 0; k < 4; k++)
if (el[k] == actpind)
{
f += CalcTetBadnessGrad (points[el.PNum(1)],
points[el.PNum(2)],
points[el.PNum(3)],
points[el.PNum(4)], -1, k, vgradi);
f += CalcTetBadnessGrad (points[el[0]], points[el[1]],
points[el[2]], points[el[3]],
-1, k+1, vgradi);
vgrad += vgradi;
vgrad += vgradi;
}
}
@ -410,30 +397,17 @@ namespace netgen
double PointFunction :: PointFunctionValueDeriv (const Point<3> & pp, const Vec<3> & dir,
double & deriv) const
{
double f;
// Point<3> hpp;
Vec<3> dirn (dir);
//double ldir = dir.Length();
int j, k;
INDEX eli;
// double badness;
Point<3> hp;
Vec<3> vgradi, vgrad(0,0,0);
// badness = 0;
hp = points[actpind];
Point<3> hp = points[actpind];
points[actpind] = pp;
f = 0;
double f = 0;
for (j = 0; j < elementsonpoint[actpind].Size(); j++)
for (int j = 0; j < elementsonpoint[actpind].Size(); j++)
{
eli = elementsonpoint[actpind][j];
const Element & el = elements.Get(eli);
const Element & el = elements[elementsonpoint[actpind][j]];
for (k = 1; k <= 4; k++)
for (int k = 1; k <= 4; k++)
if (el.PNum(k) == actpind)
{
f += CalcTetBadnessGrad (points[el.PNum(1)],
@ -458,7 +432,7 @@ namespace netgen
for (int j = 0; j < elementsonpoint[actpind].Size(); j++)
{
const Element & el =
elements.Get(elementsonpoint[actpind][j]);
elements[elementsonpoint[actpind][j]];
for (int k = 1; k <= 4; k++)
if (el.PNum(k) == actpind)
@ -539,7 +513,7 @@ namespace netgen
pi2 = 0;
pi3 = 0;
const Element & el = elements.Get (elementsonpoint[actpind][i]);
const Element & el = elements[elementsonpoint[actpind][i]];
for (j = 1; j <= 4; j++)
if (el.PNum(j) != actpind)
{
@ -826,12 +800,11 @@ namespace netgen
{
Vec3d n, vgrad;
Point3d pp1;
double badness;
static Vector freegrad(3);
CalcNewPoint (x, pp1);
badness = pf.PointFunctionValueGrad (pp1, freegrad);
double badness = pf.PointFunctionValueGrad (pp1, freegrad);
vgrad.X() = freegrad.Get(1);
vgrad.Y() = freegrad.Get(2);
vgrad.Z() = freegrad.Get(3);