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Commit fcaec46c authored by Praetorius, Simon's avatar Praetorius, Simon
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cleanup of datacollectors

parent f781632f
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dune/vtk/datacollector.hh
View file @ fcaec46c
......@@ -15,20 +15,32 @@ struct Cells
std::vector<std::int64_t> connectivity;
};
template <class GridView, class Derived>
class DataCollectorInterface
{
private:
DataCollectorInterface () = default;
public:
DataCollectorInterface (GridView const& gridView)
: gridView_(gridView)
{}
/// \brief Return the number of points in the grid
std::uint64_t numPoints () const;
std::uint64_t numPoints () const
{
return asDerived().numPointsImpl();
}
/// \brief Return the number of cells in the grid
std::uint64_t numCells () const;
std::uint64_t numCells () const
{
return asDerived().numCellsImpl();
}
/// Update the DataCollector on the current GridView
void update ();
void update ()
{
asDerived().updateImpl();
}
/// \brief Return a flat vector of point coordinates
/**
......@@ -38,10 +50,16 @@ public:
* set to 0
**/
template <class T>
std::vector<T> points () const;
std::vector<T> points () const
{
return asDerived().template pointsImpl<T>();
}
/// \brief Return cell types, offsets, and connectivity. \see Cells
Cells cells () const;
Cells cells () const
{
return asDerived().cellsImpl();
}
/// \brief Return a flat vector of function values evaluated at the grid points.
/**
......@@ -53,41 +71,93 @@ public:
* where the tensor dimension must be 3x3 (possible extended by 0s)
**/
template <class T, class GlobalFunction>
std::vector<T> pointData (GlobalFunction const& fct) const;
std::vector<T> pointData (GlobalFunction const& fct) const
{
return asDerived().template pointDataImpl<T>(fct);
}
/// \brief Return a flat vector of function values evaluated at the grid cells. \see pointData.
template <class T, class GlobalFunction>
std::vector<T> cellData (GlobalFunction const& fct) const;
std::vector<T> cellData (GlobalFunction const& fct) const
{
return asDerived().template cellDataImpl<T>(fct);
}
protected: // cast to derived type
Derived& asDerived ()
{
return static_cast<Derived&>(*this);
}
const Derived& asDerived () const
{
return static_cast<const Derived&>(*this);
}
protected: // default implementations
std::uint64_t numCellsImpl () const
{
return gridView_.size(0);
}
void updateImpl () { /* do nothing */ }
// Evaluate `fct` in center of cell
template <class T, class GlobalFunction>
std::vector<T> cellDataImpl (GlobalFunction const& fct) const
{
std::vector<T> data(numCells() * fct.ncomps());
auto const& indexSet = gridView_.indexSet();
auto localFct = localFunction(fct);
for (auto const& e : elements(gridView_)) {
localFct.bind(e);
auto geometry = e.geometry();
std::size_t idx = fct.ncomps() * indexSet.index(e);
for (int comp = 0; comp < fct.ncomps(); ++comp)
data[idx + comp] = T(localFct.evaluate(comp, geometry.center()));
localFct.unbind();
}
return data;
}
protected:
GridView gridView_;
};
/// Implementation of \ref DataCollector for linear cells, with continuous data.
template <class GridView>
class DefaultDataCollector
: public DataCollectorInterface<GridView, DefaultDataCollector<GridView>>
{
enum { dim = GridView::dimension };
using Self = DefaultDataCollector;
using Super = DataCollectorInterface<GridView, Self>;
using Super::gridView_;
public:
DefaultDataCollector (GridView const& gridView)
: gridView_(gridView)
: Super(gridView)
{}
void update () {}
std::uint64_t numPoints () const
/// Return number of grid vertices
std::uint64_t numPointsImpl () const
{
return gridView_.size(dim);
}
std::uint64_t numCells () const
{
return gridView_.size(0);
}
/// Return the coordinates of all grid vertices in the order given by the indexSet
template <class T>
std::vector<T> points () const
std::vector<T> pointsImpl () const
{
std::vector<T> data(numPoints() * 3);
std::vector<T> data(this->numPoints() * 3);
auto const& indexSet = gridView_.indexSet();
for (auto const& vertex : vertices(gridView_)) {
std::size_t idx = 3 * indexSet.index(vertex);
......@@ -100,7 +170,9 @@ public:
return data;
}
Cells cells () const
/// Return the types, offsets and connectivity of the cells, using the same connectivity as
/// given by the grid.
Cells cellsImpl () const
{
auto const& indexSet = gridView_.indexSet();
auto types = indexSet.types(0);
......@@ -110,9 +182,9 @@ public:
});
Cells cells;
cells.connectivity.reserve(numCells() * maxVertices);
cells.offsets.reserve(numCells());
cells.types.reserve(numCells());
cells.connectivity.reserve(this->numCells() * maxVertices);
cells.offsets.reserve(this->numCells());
cells.types.reserve(this->numCells());
std::int64_t old_o = 0;
for (auto const& c : elements(gridView_)) {
......@@ -126,10 +198,11 @@ public:
return cells;
}
/// Evaluate the `fct` at the corners of the elements
template <class T, class GlobalFunction>
std::vector<T> pointData (GlobalFunction const& fct) const
std::vector<T> pointDataImpl (GlobalFunction const& fct) const
{
std::vector<T> data(numPoints() * fct.ncomps());
std::vector<T> data(this->numPoints() * fct.ncomps());
auto const& indexSet = gridView_.indexSet();
auto localFct = localFunction(fct);
for (auto const& e : elements(gridView_)) {
......@@ -145,41 +218,29 @@ public:
}
return data;
}
template <class T, class GlobalFunction>
std::vector<T> cellData (GlobalFunction const& fct) const
{
std::vector<T> data(numCells() * fct.ncomps());
auto const& indexSet = gridView_.indexSet();
auto localFct = localFunction(fct);
for (auto const& e : elements(gridView_)) {
localFct.bind(e);
auto refElem = referenceElement(e.geometry());
std::size_t idx = fct.ncomps() * indexSet.index(e);
for (int comp = 0; comp < fct.ncomps(); ++comp)
data[idx + comp] = T(localFct.evaluate(comp, refElem.position(0,0)));
localFct.unbind();
}
return data;
}
private:
GridView gridView_;
};
/// Implementation of \ref DataCollector for linear cells, with discontinuous data.
template <class GridView>
class DiscontinuousDataCollector
: public DataCollectorInterface<GridView, DiscontinuousDataCollector<GridView>>
{
enum { dim = GridView::dimension };
using Self = DiscontinuousDataCollector;
using Super = DataCollectorInterface<GridView, Self>;
using Super::gridView_;
public:
DiscontinuousDataCollector (GridView const& gridView)
: gridView_(gridView)
{}
: Super(gridView)
{
this->update();
}
void update ()
/// Create an index map the uniquely assignes an index to each pair (element,corner)
void updateImpl ()
{
numPoints_ = 0;
indexMap_.resize(gridView_.size(dim));
......@@ -192,20 +253,17 @@ public:
}
}
std::uint64_t numPoints () const
/// The number of pointsi approx. #cell * #corners-per-cell
std::uint64_t numPointsImpl () const
{
return numPoints_;
}
std::uint64_t numCells () const
{
return gridView_.size(0);
}
/// Return the coordinates of the corners of all cells
template <class T>
std::vector<T> points () const
std::vector<T> pointsImpl () const
{
std::vector<T> data(numPoints() * 3);
std::vector<T> data(this->numPoints() * 3);
auto const& indexSet = gridView_.indexSet();
for (auto const& element : elements(gridView_)) {
for (int i = 0; i < element.subEntities(dim); ++i) {
......@@ -220,12 +278,13 @@ public:
return data;
}
Cells cells () const
/// Connect the corners of each cell. The leads to a global discontinuous grid
Cells cellsImpl () const
{
Cells cells;
cells.connectivity.reserve(numPoints());
cells.offsets.reserve(numCells());
cells.types.reserve(numCells());
cells.connectivity.reserve(this->numPoints());
cells.offsets.reserve(this->numCells());
cells.types.reserve(this->numCells());
std::int64_t old_o = 0;
auto const& indexSet = gridView_.indexSet();
......@@ -242,10 +301,11 @@ public:
return cells;
}
/// Evaluate the `fct` in the corners of each cell
template <class T, class GlobalFunction>
std::vector<T> pointData (GlobalFunction const& fct) const
std::vector<T> pointDataImpl (GlobalFunction const& fct) const
{
std::vector<T> data(numPoints() * fct.ncomps());
std::vector<T> data(this->numPoints() * fct.ncomps());
auto const& indexSet = gridView_.indexSet();
auto localFct = localFunction(fct);
for (auto const& e : elements(gridView_)) {
......@@ -262,25 +322,7 @@ public:
return data;
}
template <class T, class GlobalFunction>
std::vector<T> cellData (GlobalFunction const& fct) const
{
std::vector<T> data(numCells() * fct.ncomps());
auto const& indexSet = gridView_.indexSet();
auto localFct = localFunction(fct);
for (auto const& e : elements(gridView_)) {
localFct.bind(e);
auto refElem = referenceElement(e.geometry());
std::size_t idx = fct.ncomps() * indexSet.index(e);
for (int comp = 0; comp < fct.ncomps(); ++comp)
data[idx + comp] = T(localFct.evaluate(comp, refElem.position(0,0)));
localFct.unbind();
}
return data;
}
private:
GridView gridView_;
std::uint64_t numPoints_ = 0;
std::vector<std::int64_t> indexMap_;
};
......@@ -289,30 +331,34 @@ private:
/// Implementation of \ref DataCollector for quadratic cells, with continuous data.
template <class GridView>
class QuadraticDataCollector
: public DataCollectorInterface<GridView, QuadraticDataCollector<GridView>>
{
enum { dim = GridView::dimension };
using Self = QuadraticDataCollector;
using Super = DataCollectorInterface<GridView, Self>;
using Super::gridView_;
public:
QuadraticDataCollector (GridView const& gridView)
: gridView_(gridView)
: Super(gridView)
{}
void update () {}
std::uint64_t numPoints () const
/// Return number of vertices + number of edge
std::uint64_t numPointsImpl () const
{
return gridView_.size(dim) + gridView_.size(dim-1);
}
std::uint64_t numCells () const
{
return gridView_.size(0);
}
/// Return a vector of point coordinates.
/**
* The vector of point coordinates is composed of vertex coordinates first and second
* edge center coordinates.
**/
template <class T>
std::vector<T> points () const
std::vector<T> pointsImpl () const
{
std::vector<T> data(numPoints() * 3);
std::vector<T> data(this->numPoints() * 3);
auto const& indexSet = gridView_.indexSet();
for (auto const& element : elements(gridView_)) {
auto geometry = element.geometry();
......@@ -340,12 +386,17 @@ public:
return data;
}
Cells cells () const
/// \brief Return cell types, offsets, and connectivity. \see Cells
/**
* The cell connectivity is composed of cell vertices first and second cell edges,
* where the indices are grouped [vertex-indices..., (#vertices)+edge-indices...]
**/
Cells cellsImpl () const
{
Cells cells;
cells.connectivity.reserve(numPoints());
cells.offsets.reserve(numCells());
cells.types.reserve(numCells());
cells.connectivity.reserve(this->numPoints());
cells.offsets.reserve(this->numCells());
cells.types.reserve(this->numCells());
std::int64_t old_o = 0;
auto const& indexSet = gridView_.indexSet();
......@@ -368,10 +419,11 @@ public:
return cells;
}
/// Evaluate the `fct` at element vertices and edge centers in the same order as the point coords.
template <class T, class GlobalFunction>
std::vector<T> pointData (GlobalFunction const& fct) const
std::vector<T> pointDataImpl (GlobalFunction const& fct) const
{
std::vector<T> data(numPoints() * fct.ncomps());
std::vector<T> data(this->numPoints() * fct.ncomps());
auto const& indexSet = gridView_.indexSet();
auto localFct = localFunction(fct);
for (auto const& e : elements(gridView_)) {
......@@ -394,26 +446,6 @@ public:
}
return data;
}
template <class T, class GlobalFunction>
std::vector<T> cellData (GlobalFunction const& fct) const
{
std::vector<T> data(numCells() * fct.ncomps());
auto const& indexSet = gridView_.indexSet();
auto localFct = localFunction(fct);
for (auto const& e : elements(gridView_)) {
localFct.bind(e);
auto refElem = referenceElement(e.geometry());
std::size_t idx = fct.ncomps() * indexSet.index(e);
for (int comp = 0; comp < fct.ncomps(); ++comp)
data[idx + comp] = T(localFct.evaluate(comp, refElem.position(0,0)));
localFct.unbind();
}
return data;
}
private:
GridView gridView_;
};
}} // end namespace Dune::experimental
src/vtkreader.cc
View file @ fcaec46c
......@@ -76,7 +76,7 @@ int main(int argc, char** argv)
vtkWriter.write("test_ascii_float32_4.vtu", Vtk::ASCII);
}
{
if (filesystem::exists("paraview_3d.vtu")) {
using GridType3d = UGGrid<3>;
using GridView3d = typename GridType3d::LeafGridView;
auto gridPtr = VtkReader<GridType3d>::read("paraview_3d.vtu");
......@@ -86,14 +86,14 @@ int main(int argc, char** argv)
vtkWriter.write("paraview_3d_ascii.vtu", Vtk::ASCII, Vtk::FLOAT64);
}
// {
// std::cout << "paraview_2d_ascii...\n";
// using GridType2d = UGGrid<2>;
// using GridView2d = typename GridType2d::LeafGridView;
// auto gridPtr = VtkReader<GridType2d>::read("paraview_2d.vtu");
// auto& grid = *gridPtr;
if (filesystem::exists("paraview_2d.vtu")) {
std::cout << "paraview_2d_ascii...\n";
using GridType2d = UGGrid<2>;
using GridView2d = typename GridType2d::LeafGridView;
auto gridPtr = VtkReader<GridType2d>::read("paraview_2d.vtu");
auto& grid = *gridPtr;
// VtkWriter<GridView2d> vtkWriter(grid.leafGridView());
// vtkWriter.write("paraview_2d_ascii.vtu", Vtk::ASCII, Vtk::FLOAT64);
// }
VtkWriter<GridView2d> vtkWriter(grid.leafGridView());
vtkWriter.write("paraview_2d_ascii.vtu", Vtk::ASCII, Vtk::FLOAT64);
}
}
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