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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "TaskParallelismWithPorts.h"
#include "vtkImageData.h"
#include "vtkOutputPort.h"
#include "vtkPolyData.h"
// Task 4 for TaskParallelism.
// See TaskParallelismWithPorts.cxx for more information.
void task4(double data)
{
double extent = data;
int iextent = static_cast<int>(data);
// The pipeline
// Synthetic image source.
vtkRTAnalyticSource* source1 = vtkRTAnalyticSource::New();
source1->SetWholeExtent(-1 * iextent, iextent, -1 * iextent, iextent, -1 * iextent, iextent);
source1->SetCenter(0, 0, 0);
source1->SetStandardDeviation(0.5);
source1->SetMaximum(255.0);
source1->SetXFreq(60);
source1->SetXMag(10);
source1->SetYFreq(30);
source1->SetYMag(18);
source1->SetZFreq(40);
source1->SetZMag(5);
source1->GetOutput()->SetSpacing(2.0 / extent, 2.0 / extent, 2.0 / extent);
// Gradient vector.
vtkImageGradient* grad = vtkImageGradient::New();
grad->SetDimensionality(3);
grad->SetInputConnection(source1->GetOutputPort());
vtkImageShrink3D* mask = vtkImageShrink3D::New();
mask->SetInputConnection(grad->GetOutputPort());
mask->SetShrinkFactors(5, 5, 5);
// Label the scalar field as the active vectors.
vtkAssignAttribute* aa = vtkAssignAttribute::New();
aa->SetInputConnection(mask->GetOutputPort());
aa->Assign(
vtkDataSetAttributes::SCALARS, vtkDataSetAttributes::VECTORS, vtkAssignAttribute::POINT_DATA);
vtkGlyphSource2D* arrow = vtkGlyphSource2D::New();
arrow->SetGlyphTypeToArrow();
arrow->SetScale(0.2);
arrow->FilledOff();
// Glyph the gradient vector (with arrows)
vtkGlyph3D* glyph = vtkGlyph3D::New();
glyph->SetInputConnection(aa->GetOutputPort());
glyph->SetSource(arrow->GetOutput());
glyph->ScalingOff();
glyph->OrientOn();
glyph->SetVectorModeToUseVector();
glyph->SetColorModeToColorByVector();
// Output port
vtkOutputPort* op = vtkOutputPort::New();
op->SetInputConnection(glyph->GetOutputPort());
op->SetTag(11);
// Process requests
op->WaitForUpdate();
// Cleanup
op->Delete();
source1->Delete();
grad->Delete();
aa->Delete();
mask->Delete();
glyph->Delete();
arrow->Delete();
}
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