std::pair<double,double> probe( const MESH& mesh, const DISP& displacement,
const PRESS& pressure )
{
// pick an element
const std::size_t numElements = std::distance( mesh.elementsBegin(), mesh.elementsEnd() );
const std::size_t elemNum = (numElements +
static_cast<std::size_t>(std::sqrt(numElements)) ) / 2;
// geometry
const typename MESH::Element* geomEp = mesh.elementPtr( elemNum );
const typename base::Vector<MESH::Element::dim>::Type xi =
base::constantVector<MESH::Element::dim>( 0. );
const typename base::Geometry<typename MESH::Element>::result_type x =
base::Geometry<typename MESH::Element>()( geomEp, xi );
// displacement
const typename DISP::Element* dispEp = displacement.elementPtr( elemNum );
const typename base::Vector<DISP::DegreeOfFreedom::size>::Type uh =
base::post::evaluateField( geomEp, dispEp, xi );
// pressure
const typename PRESS::Element* pressEp = pressure.elementPtr( elemNum );
const typename base::Vector<PRESS::DegreeOfFreedom::size>::Type ph =
base::post::evaluateField( geomEp, pressEp, xi );
return std::make_pair( uh[1], ph[0] );
}
void moveSurface( const MESH& mesh,
const FIELD& velocity,
typename base::cut::SurfaceMeshBinder<MESH>::SurfaceMesh &surfaceMesh,
const double dt,
const double factor,
const typename MESH::Node::VecDim ¢roid )
{
typedef typename base::cut::SurfaceMeshBinder<MESH>::SurfaceMesh SurfaceMesh;
typedef typename base::Vector<MESH::Node::dim>::Type VecDim;
// go through all elements of the surface mesh
typename SurfaceMesh::ElementPtrIter eIter = surfaceMesh.elementsBegin();
typename SurfaceMesh::ElementPtrIter eEnd = surfaceMesh.elementsEnd();
for ( ; eIter != eEnd; ++eIter )
{
const std::size_t elemID = (*eIter) -> getDomainID();
const typename MESH::Element* geomElem = mesh.elementPtr( elemID );
const typename FIELD::Element* velocElem = velocity.elementPtr( elemID );
typename SurfaceMesh::Element::ParamIter pIter = (*eIter) -> parametricBegin();
typename SurfaceMesh::Element::ParamIter pEnd = (*eIter) -> parametricEnd();
typename SurfaceMesh::Element::NodePtrIter nIter = (*eIter) -> nodesBegin();
for ( ; pIter != pEnd; ++pIter, ++nIter ) {
// evaluate time step times velocity at parameter coordinate
const VecDim du = dt *
base::post::evaluateFieldHistory<0>( geomElem, velocElem, *pIter );
// get old location
VecDim x;
(*nIter) -> getX( &(x[0]) );
// add value to nodal coordinate
//const VecDim xNew = x + du;
const VecDim xNew = centroid + factor * (x-centroid) + du;
(*nIter) -> setX( &(xNew[0]) );
}
}
return;
}