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#include <iostream>
#include "FEAdaptor.h"
#include "FEDataStructures.h"
#include <vtkCellData.h>
#include <vtkCellType.h>
#include <vtkCPDataDescription.h>
#include <vtkCPInputDataDescription.h>
#include <vtkCPProcessor.h>
#include <vtkCPPythonScriptPipeline.h>
#include <vtkDoubleArray.h>
#include <vtkFloatArray.h>
#include <vtkNew.h>
#include <vtkPoints.h>
#include <vtkPointData.h>
#include <vtkUnstructuredGrid.h>
namespace
{
vtkCPProcessor* Processor = NULL;
void BuildVTKGrid(Grid& grid, vtkUnstructuredGrid* vtkgrid)
{
// create the points information
vtkNew<vtkDoubleArray> pointArray;
pointArray->SetNumberOfComponents(3);
pointArray->SetArray(grid.GetPointsArray(), static_cast<vtkIdType>(grid.GetNumberOfPoints()*3), 1);
vtkNew<vtkPoints> points;
points->SetData(pointArray.GetPointer());
vtkgrid->SetPoints(points.GetPointer());
// create the cells
size_t numCells = grid.GetNumberOfCells();
vtkgrid->Allocate(static_cast<vtkIdType>(numCells*9));
for(size_t cell=0;cell<numCells;cell++)
{
unsigned int* cellPoints = grid.GetCellPoints(cell);
vtkIdType tmp[8] = {cellPoints[0], cellPoints[1], cellPoints[2], cellPoints[3],
cellPoints[4], cellPoints[5], cellPoints[6], cellPoints[7]};
vtkgrid->InsertNextCell(VTK_HEXAHEDRON, 8, tmp);
}
}
void UpdateVTKAttributes(Grid& grid, Attributes& attributes, vtkUnstructuredGrid* vtkgrid)
{
if(vtkgrid->GetPointData()->GetNumberOfArrays() == 0)
{
// velocity array
vtkNew<vtkDoubleArray> velocity;
velocity->SetName("velocity");
velocity->SetNumberOfComponents(3);
velocity->SetNumberOfTuples(static_cast<vtkIdType>(grid.GetNumberOfPoints()));
vtkgrid->GetPointData()->AddArray(velocity.GetPointer());
}
if(vtkgrid->GetCellData()->GetNumberOfArrays() == 0)
{
// pressure array
vtkNew<vtkFloatArray> pressure;
pressure->SetName("pressure");
pressure->SetNumberOfComponents(1);
vtkgrid->GetCellData()->AddArray(pressure.GetPointer());
}
vtkDoubleArray* velocity = vtkDoubleArray::SafeDownCast(
vtkgrid->GetPointData()->GetArray("velocity"));
// The velocity array is ordered as vx0,vx1,vx2,..,vy0,vy1,vy2,..,vz0,vz1,vz2,..
// so we need to create a full copy of it with VTK's ordering of
// vx0,vy0,vz0,vx1,vy1,vz1,..
double* velocityData = attributes.GetVelocityArray();
vtkIdType numTuples = velocity->GetNumberOfTuples();
for(vtkIdType i=0;i<numTuples;i++)
{
double values[3] = {velocityData[i], velocityData[i+numTuples],
velocityData[i+2*numTuples]};
velocity->SetTypedTuple(i, values);
}
vtkFloatArray* pressure = vtkFloatArray::SafeDownCast(
vtkgrid->GetCellData()->GetArray("pressure"));
// The pressure array is a scalar array so we can reuse
// memory as long as we ordered the points properly.
float* pressureData = attributes.GetPressureArray();
pressure->SetArray(pressureData, static_cast<vtkIdType>(grid.GetNumberOfCells()), 1);
}
void BuildVTKDataStructures(Grid& grid, Attributes& attributes, vtkUnstructuredGrid* vtkgrid)
{
BuildVTKGrid(grid, vtkgrid);
UpdateVTKAttributes(grid, attributes, vtkgrid);
}
}
namespace FEAdaptor
{
void Initialize(std::vector<std::string>& scripts)
{
if(Processor == NULL)
{
Processor = vtkCPProcessor::New();
Processor->Initialize();
}
else
{
Processor->RemoveAllPipelines();
}
for(std::vector<std::string>::iterator it=scripts.begin();it!=scripts.end();it++)
{
vtkNew<vtkCPPythonScriptPipeline> pipeline;
pipeline->Initialize(it->c_str());
Processor->AddPipeline(pipeline.GetPointer());
}
}
void Finalize()
{
if(Processor)
{
Processor->Delete();
Processor = NULL;
}
}
void CoProcess(Grid& grid, Attributes& attributes, double time,
unsigned int timeStep, bool lastTimeStep)
{
vtkNew<vtkCPDataDescription> dataDescription;
dataDescription->AddInput("input");
dataDescription->SetTimeData(time, timeStep);
if(lastTimeStep == true)
{
// assume that we want to all the pipelines to execute if it
// is the last time step.
dataDescription->ForceOutputOn();
}
if(Processor->RequestDataDescription(dataDescription.GetPointer()) != 0)
{
vtkNew<vtkUnstructuredGrid> vtkgrid;
BuildVTKDataStructures(grid, attributes, vtkgrid.GetPointer());
dataDescription->GetInputDescriptionByName("input")->SetGrid(vtkgrid.GetPointer());
Processor->CoProcess(dataDescription.GetPointer());
}
}
} // end of Catalyst namespace
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