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#include <iostream>
#include "FEAdaptor.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;
vtkUnstructuredGrid* VTKGrid;
void BuildVTKGrid(unsigned int numberOfPoints, double* pointsData,
unsigned int numberOfCells, unsigned int* cellsData)
{
// create the points information
vtkNew<vtkDoubleArray> pointArray;
pointArray->SetNumberOfComponents(3);
pointArray->SetArray(pointsData, static_cast<vtkIdType>(numberOfPoints*3), 1);
vtkNew<vtkPoints> points;
points->SetData(pointArray.GetPointer());
VTKGrid->SetPoints(points.GetPointer());
// create the cells
VTKGrid->Allocate(static_cast<vtkIdType>(numberOfCells*9));
for(unsigned int cell=0;cell<numberOfCells;cell++)
{
unsigned int* cellPoints = cellsData+8*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(unsigned int numberOfPoints, double* velocityData,
unsigned int numberOfCells, float* pressureData)
{
if(VTKGrid->GetPointData()->GetNumberOfArrays() == 0)
{
// velocity array
vtkNew<vtkDoubleArray> velocity;
velocity->SetName("velocity");
velocity->SetNumberOfComponents(3);
velocity->SetNumberOfTuples(static_cast<vtkIdType>(numberOfPoints));
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,..
for(unsigned int i=0;i<numberOfPoints;i++)
{
double values[3] = {velocityData[i], velocityData[i+numberOfPoints],
velocityData[i+2*numberOfPoints]};
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.
pressure->SetArray(pressureData, static_cast<vtkIdType>(numberOfCells), 1);
}
void BuildVTKDataStructures(unsigned int numberOfPoints, double* points, double* velocity,
unsigned int numberOfCells, unsigned int* cells, float* pressure)
{
if(VTKGrid == NULL)
{
// The grid structure isn't changing so we only build it
// the first time it's needed. If we needed the memory
// we could delete it and rebuild as necessary.
VTKGrid = vtkUnstructuredGrid::New();
BuildVTKGrid(numberOfPoints, points, numberOfCells, cells);
}
UpdateVTKAttributes(numberOfPoints, velocity, numberOfCells, pressure);
}
}
void CatalystInitialize(int numScripts, char* scripts[])
{
if(Processor == NULL)
{
Processor = vtkCPProcessor::New();
Processor->Initialize();
}
else
{
Processor->RemoveAllPipelines();
}
for(int i=1;i<numScripts;i++)
{
vtkNew<vtkCPPythonScriptPipeline> pipeline;
pipeline->Initialize(scripts[i]);
Processor->AddPipeline(pipeline.GetPointer());
}
}
void CatalystFinalize()
{
if(Processor)
{
Processor->Delete();
Processor = NULL;
}
if(VTKGrid)
{
VTKGrid->Delete();
VTKGrid = NULL;
}
}
void CatalystCoProcess(unsigned int numberOfPoints, double* pointsData,
unsigned int numberOfCells, unsigned int* cellsData,
double* velocityData, float* pressureData, double time,
unsigned int timeStep, int 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)
{
BuildVTKDataStructures(numberOfPoints, pointsData, velocityData,
numberOfCells, cellsData, pressureData);
dataDescription->GetInputDescriptionByName("input")->SetGrid(VTKGrid);
Processor->CoProcess(dataDescription.GetPointer());
}
}
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