bool ASMs1DSpec::getGridParameters (RealArray& prm, int nSegPerSpan) const
{
if (!curv) return false;
// Evaluate the Gauss-Lobatto-Legendre points
Vector dummy, xGLL;
if (!Legendre::GLL(dummy,xGLL,curv->order())) return false;
if (xGLL.size() != (size_t)(nSegPerSpan+1))
{
nSegPerSpan = xGLL.size() - 1;
std::cout <<"Spectral elements: Number of nodes per knot-span reset to "
<< nSegPerSpan <<" (GLL points)"<< std::endl;
}
RealArray::const_iterator uit = curv->basis().begin();
double ucurr, uprev = *(uit++);
while (uit != curv->basis().end())
{
ucurr = *(uit++);
if (ucurr > uprev)
for (int i = 1; i <= nSegPerSpan; i++)
prm.push_back(0.5*(ucurr-uprev)*(1.0+xGLL(i)) + uprev);
uprev = ucurr;
}
prm.push_back(curv->basis().endparam());
return true;
}
bool ASMs2DSpec::getGridParameters (RealArray& prm, int dir,
int nSegPerSpan) const
{
if (!surf) return false;
// Evaluate the Gauss-Lobatto-Legendre points in this direction
Vector dummy, xGLL;
int p = dir == 0 ? surf->order_u() : surf->order_v();
if (!Legendre::GLL(dummy,xGLL,p)) return false;
if (xGLL.size() != (size_t)(nSegPerSpan+1))
{
nSegPerSpan = xGLL.size() - 1;
std::cout <<"Spectral elements: Number of nodes per knot-span in "
<< char('u'+dir) <<"-directon reset to "<< nSegPerSpan
<<" (GLL points)"<< std::endl;
}
RealArray::const_iterator uit = surf->basis(dir).begin();
double uprev = *(uit++);
while (uit != surf->basis(dir).end())
{
double ucurr = *(uit++);
if (ucurr > uprev)
for (int i = 1; i <= nSegPerSpan; i++)
prm.push_back(0.5*(ucurr-uprev)*(1.0+xGLL(i)) + uprev);
uprev = ucurr;
}
prm.push_back(surf->basis(dir).endparam());
return true;
}