/usr/share/vtk/MultiBlock/Cxx/MultiBlock.cxx is in vtk-examples 5.8.0-5.
This file is owned by root:root, with mode 0o644.
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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 | /*=========================================================================
Program: Visualization Toolkit
Module: MultiBlock.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// This example demonstrates how multi-block datasets can be processed
// using the new vtkMultiBlockDataSet class.
//
// The command line arguments are:
// -D <path> => path to the data (VTKData); the data should be in <path>/Data/
#include "vtkActor.h"
#include "vtkCellDataToPointData.h"
#include "vtkCompositeDataGeometryFilter.h"
#include "vtkCompositeDataPipeline.h"
#include "vtkContourFilter.h"
#include "vtkDebugLeaks.h"
#include "vtkMultiBlockDataSet.h"
#include "vtkOutlineCornerFilter.h"
#include "vtkPolyData.h"
#include "vtkPolyDataMapper.h"
#include "vtkProperty.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkShrinkPolyData.h"
#include "vtkStructuredGrid.h"
#include "vtkStructuredGridOutlineFilter.h"
#include "vtkTestUtilities.h"
#include "vtkXMLStructuredGridReader.h"
#include <vtksys/ios/sstream>
int main(int argc, char* argv[])
{
vtkCompositeDataPipeline* exec = vtkCompositeDataPipeline::New();
vtkAlgorithm::SetDefaultExecutivePrototype(exec);
exec->Delete();
// Standard rendering classes
vtkRenderer *ren = vtkRenderer::New();
vtkRenderWindow *renWin = vtkRenderWindow::New();
renWin->AddRenderer(ren);
vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
iren->SetRenderWindow(renWin);
// We will read three files and collect them together in one
// multi-block dataset. I broke the combustor dataset into
// three pieces and wrote them out separately.
int i;
vtkXMLStructuredGridReader* reader = vtkXMLStructuredGridReader::New();
// vtkMultiBlockDataSet respresents multi-block datasets. See
// the class documentation for more information.
vtkMultiBlockDataSet* mb = vtkMultiBlockDataSet::New();
for (i=0; i<3; i++)
{
// Here we load the three separate files (each containing
// a structured grid dataset)
vtksys_ios::ostringstream fname;
fname << "Data/multicomb_" << i << ".vts" << ends;
char* cfname =
vtkTestUtilities::ExpandDataFileName(argc, argv, fname.str().c_str());
reader->SetFileName(cfname);
// We have to update since we are working without a VTK pipeline.
// This will read the file and the output of the reader will be
// a valid structured grid data.
reader->Update();
delete[] cfname;
// We create a copy to avoid adding the same data three
// times (the output object of the reader does not change
// when the filename changes)
vtkStructuredGrid* sg = vtkStructuredGrid::New();
sg->ShallowCopy(reader->GetOutput());
// Add the structured grid to the multi-block dataset
mb->SetBlock(i, sg);
sg->Delete();
}
reader->Delete();
// Multi-block can be processed with regular VTK filters in two ways:
// 1. Pass through a multi-block aware consumer. Since a multi-block
// aware mapper is not yet available, vtkCompositeDataGeometryFilter
// can be used
// 2. Assign the composite executive (vtkCompositeDataPipeline) to
// all "simple" (that work only on simple, non-composite datasets) filters
// outline
vtkStructuredGridOutlineFilter* of = vtkStructuredGridOutlineFilter::New();
of->SetInput(mb);
// geometry filter
// This filter is multi-block aware and will request blocks from the
// input. These blocks will be processed by simple processes as if they
// are the whole dataset
vtkCompositeDataGeometryFilter* geom1 =
vtkCompositeDataGeometryFilter::New();
geom1->SetInputConnection(0, of->GetOutputPort(0));
// Rendering objects
vtkPolyDataMapper* geoMapper = vtkPolyDataMapper::New();
geoMapper->SetInputConnection(0, geom1->GetOutputPort(0));
vtkActor* geoActor = vtkActor::New();
geoActor->SetMapper(geoMapper);
geoActor->GetProperty()->SetColor(0, 0, 0);
ren->AddActor(geoActor);
// cell 2 point and contour
vtkCellDataToPointData* c2p = vtkCellDataToPointData::New();
c2p->SetInput(mb);
vtkContourFilter* contour = vtkContourFilter::New();
contour->SetInputConnection(0, c2p->GetOutputPort(0));
contour->SetValue(0, 0.45);
// geometry filter
vtkCompositeDataGeometryFilter* geom2 =
vtkCompositeDataGeometryFilter::New();
geom2->SetInputConnection(0, contour->GetOutputPort(0));
// Rendering objects
vtkPolyDataMapper* contMapper = vtkPolyDataMapper::New();
contMapper->SetInputConnection(0, geom2->GetOutputPort(0));
vtkActor* contActor = vtkActor::New();
contActor->SetMapper(contMapper);
contActor->GetProperty()->SetColor(1, 0, 0);
ren->AddActor(contActor);
ren->SetBackground(1,1,1);
renWin->SetSize(300,300);
iren->Start();
// Cleanup
vtkAlgorithm::SetDefaultExecutivePrototype(0);
of->Delete();
geom1->Delete();
geoMapper->Delete();
geoActor->Delete();
c2p->Delete();
contour->Delete();
geom2->Delete();
contMapper->Delete();
contActor->Delete();
ren->Delete();
renWin->Delete();
iren->Delete();
mb->Delete();
return 0;
}
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