1 /*=========================================================================
2
3 Program: Visualization Toolkit
4 Module: task2.cxx
5
6 Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
7 All rights reserved.
8 See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
9
10 This software is distributed WITHOUT ANY WARRANTY; without even
11 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12 PURPOSE. See the above copyright notice for more information.
13
14 =========================================================================*/
15 #include "TaskParallelism.h"
16
17 #include "vtkImageData.h"
18 #include "vtkPolyDataMapper.h"
19
20 // Task 2 for TaskParallelism.
21 // See TaskParallelism.cxx for more information.
task2(vtkRenderWindow * renWin,double data,vtkCamera * cam)22 vtkPolyDataMapper* task2(vtkRenderWindow* renWin, double data,
23 vtkCamera* cam)
24 {
25 double extent = data;
26 int iextent = static_cast<int>(data);
27 // The pipeline
28
29 // Synthetic image source.
30 vtkRTAnalyticSource* source1 = vtkRTAnalyticSource::New();
31 source1->SetWholeExtent (-1*iextent, iextent, -1*iextent, iextent,
32 -1*iextent, iextent );
33 source1->SetCenter(0, 0, 0);
34 source1->SetStandardDeviation( 0.5 );
35 source1->SetMaximum( 255.0 );
36 source1->SetXFreq( 60 );
37 source1->SetXMag( 10 );
38 source1->SetYFreq( 30 );
39 source1->SetYMag( 18 );
40 source1->SetZFreq( 40 );
41 source1->SetZMag( 5 );
42 source1->GetOutput()->SetSpacing(2.0/extent,2.0/extent,2.0/extent);
43
44 // Gradient vector.
45 vtkImageGradient* grad = vtkImageGradient::New();
46 grad->SetDimensionality( 3 );
47 grad->SetInputConnection(source1->GetOutputPort());
48
49 vtkImageShrink3D* mask = vtkImageShrink3D::New();
50 mask->SetInputConnection(grad->GetOutputPort());
51 mask->SetShrinkFactors(5, 5, 5);
52
53
54 // Label the scalar field as the active vectors.
55 vtkAssignAttribute* aa = vtkAssignAttribute::New();
56 aa->SetInputConnection(mask->GetOutputPort());
57 aa->Assign(vtkDataSetAttributes::SCALARS, vtkDataSetAttributes::VECTORS,
58 vtkAssignAttribute::POINT_DATA);
59
60 vtkGlyphSource2D* arrow = vtkGlyphSource2D::New();
61 arrow->SetGlyphTypeToArrow();
62 arrow->SetScale(0.2);
63 arrow->FilledOff();
64
65 // Glyph the gradient vector (with arrows)
66 vtkGlyph3D* glyph = vtkGlyph3D::New();
67 glyph->SetInputConnection(aa->GetOutputPort());
68 glyph->SetSourceConnection(arrow->GetOutputPort());
69 glyph->ScalingOff();
70 glyph->OrientOn();
71 glyph->SetVectorModeToUseVector();
72 glyph->SetColorModeToColorByVector();
73
74 // Rendering objects.
75 vtkPolyDataMapper* mapper = vtkPolyDataMapper::New();
76 mapper->SetInputConnection(glyph->GetOutputPort());
77 mapper->SetScalarRange(50, 180);
78 mapper->ImmediateModeRenderingOn();
79
80 vtkActor* actor = vtkActor::New();
81 actor->SetMapper(mapper);
82
83 vtkRenderer* ren = vtkRenderer::New();
84 renWin->AddRenderer(ren);
85
86 ren->AddActor(actor);
87 ren->SetActiveCamera( cam );
88
89 // Cleanup
90 source1->Delete();
91 grad->Delete();
92 aa->Delete();
93 mask->Delete();
94 glyph->Delete();
95 arrow->Delete();
96 actor->Delete();
97 ren->Delete();
98
99 return mapper;
100 }
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