本文整理汇总了C++中SurfaceMesh::elementsBegin方法的典型用法代码示例。如果您正苦于以下问题：C++ SurfaceMesh::elementsBegin方法的具体用法？C++ SurfaceMesh::elementsBegin怎么用？C++ SurfaceMesh::elementsBegin使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类SurfaceMesh的用法示例。
在下文中一共展示了SurfaceMesh::elementsBegin方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: operator
void operator()( const Grid & grid,
const unsigned dir,
const bool begin,
SurfaceMesh & surfaceMesh ) const
{
//! Sanity check of direction
VERIFY_MSG( (dir < Grid::dim), "Input argument for direction wrong" );
//! Dimensions of the grid
const MultiIndexType gridSizes = grid.gridSizes();
//! Multi-index component to compare with
const int mIndexComp = ( begin == false ? 0 : gridSizes[dir]-1 );
//! Number of elements in the structured grid
const std::size_t numElements = MultiIndex::length( gridSizes );
//! Number of elements on the requested surface
const std::size_t numElementsOnSurface = numElements / gridSizes[ dir ];
//! Construct parametric geometry of the element
const unsigned surfaceID =
detail_::convertToSurfaceID<VolumeElement::shape>( dir, begin );
//! List of indices of the parameter space vertices which form the surface
typename ParameterSurface::Surface
parameterSurfaceIndices = ParameterSurface::surfaceTable[ surfaceID ];
//! Interpolation points of the surface shape function
boost::array< typename SurfaceShapeFun::VecDim,
SurfaceShapeFun::numFun> surfaceSupportPoints;
SurfaceShapeFun::supportPoints( surfaceSupportPoints );
//! Vertices of the parameter volume
boost::array< typename LinearVolumeFun::VecDim,
LinearVolumeFun::numFun> volumeVertices;
LinearVolumeFun::supportPoints( volumeVertices );
// --> Reorder for hiearchical ordering
// Then, the object ParameterFaces< shape, dim-1> can be used and
// ParamaterSurface discarded.
//! Iterator to surface mesh elements
typename SurfaceMesh::ElementPtrIter surfElemIter
= surfaceMesh.elementsBegin();
//! Linear shape function on the surface simplex
LinearSimplexFun linearSimplexFun;
//! Hexahedra will have two triangles per face
const unsigned numSurfElementsPerElement =
detail_::NumSimplicesPerElementSurface<VolumeElement::shape>::value;
//! Temporary storage of surface elements and nodes
std::vector<SurfaceElement*> surfaceElements;
surfaceElements.reserve( numElementsOnSurface * numSurfElementsPerElement );
std::vector<SurfaceNode*> surfaceNodes;
//! node counter
std::size_t nodeCtr = 0;
//! Go through all elements
for ( std::size_t e = 0; e < numElements; e ++ ) {
//! Construct multi-index from linear counter
const MultiIndexType eM = MultiIndex::wrap( e, gridSizes );
//! Check if on requested boundary surface
const bool onBoundary = ( eM[ dir ] == mIndexComp );
//! If so, construct the surface element(s)
if ( onBoundary ) {
//! Get pointer to volume element
VolumeElement * vep = grid.elementPtr( eM );
//! Go through elements on the surface of the volume element
for ( unsigned se = 0; se < numSurfElementsPerElement; se ++ ) {
//! Create new surface element
SurfaceElement * surfElem = new SurfaceElement;
//! Extract the surface simplex's vertices
boost::array<unsigned, numSurfSimplexVertices> surfSimplex;
detail_::ExtractSurfaceSimplex<VolumeElement::shape>()( parameterSurfaceIndices,
se, surfSimplex );
//! Set volume element pointer
surfElem -> setVolumeElementPointer( vep );
//! Access to surface elements geometry nodes
typename SurfaceElement::NodePtrIter nodePtrIter =
surfElem -> nodesBegin();
//! Go through the parameter points of the surface element
typename SurfaceElement::ParamIter paramIter =
surfElem -> parametricBegin();
typename SurfaceElement::ParamIter paramEnd =
surfElem -> parametricEnd();
//.........这里部分代码省略.........