Newer
Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
#include "FEAdaptor.h"
#include "FEDataStructures.h"
#include <iostream>
#include <vtkCPDataDescription.h>
#include <vtkCPInputDataDescription.h>
#include <vtkCPProcessor.h>
#include <vtkCPPythonScriptPipeline.h>
#include <vtkCellData.h>
#include <vtkCellType.h>
#include <vtkDoubleArray.h>
#include <vtkFloatArray.h>
#include <vtkNew.h>
#include <vtkPointData.h>
#include <vtkPoints.h>
#include <vtkUnstructuredGrid.h>
namespace
{
vtkCPProcessor* Processor = NULL;
vtkUnstructuredGrid* VTKGrid;
void BuildVTKGrid(Grid& grid)
{
// 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, vtkCPInputDataDescription* idd)
{
if (idd->IsFieldNeeded("velocity", vtkDataObject::POINT) == true)
{
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());
}
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);
}
}
if (idd->IsFieldNeeded("pressure", vtkDataObject::CELL) == true)
{
if (VTKGrid->GetCellData()->GetNumberOfArrays() == 0)
{
// pressure array
vtkNew<vtkFloatArray> pressure;
pressure->SetName("pressure");
pressure->SetNumberOfComponents(1);
VTKGrid->GetCellData()->AddArray(pressure.GetPointer());
}
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, vtkCPInputDataDescription* idd)
{
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(grid);
}
UpdateVTKAttributes(grid, attributes, idd);
}
}
namespace FEAdaptor
{
void Initialize(char* script)
{
if (Processor == NULL)
{
Processor = vtkCPProcessor::New();
Processor->Initialize();
}
else
{
Processor->RemoveAllPipelines();
}
vtkNew<vtkCPPythonScriptPipeline> pipeline;
pipeline->Initialize(script);
Processor->AddPipeline(pipeline.GetPointer());
}
void Finalize()
{
if (Processor)
{
Processor->Delete();
Processor = NULL;
}
if (VTKGrid)
{
VTKGrid->Delete();
VTKGrid = 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 execute all the pipelines if it
// is the last time step.
dataDescription->ForceOutputOn();
}
if (Processor->RequestDataDescription(dataDescription.GetPointer()) != 0)
{
vtkCPInputDataDescription* idd = dataDescription->GetInputDescriptionByName("input");
BuildVTKDataStructures(grid, attributes, idd);
idd->SetGrid(VTKGrid);
Processor->CoProcess(dataDescription.GetPointer());
}
}
} // end of Catalyst namespace