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/*=========================================================================
Program: Visualization Toolkit
Module: TestGenericGeometryFilter.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 to implement a vtkGenericDataSet
// (here vtkBridgeDataSet) and to use vtkGenericDataSetTessellator filter on
// it.
//
// The command line arguments are:
// -I => run in interactive mode; unless this is used, the program will
// not allow interaction and exit
// -D <path> => path to the data; the data should be in <path>/Data/
//#define WRITE_GENERIC_RESULT
#include "vtkActor.h"
#include "vtkDebugLeaks.h"
#include "vtkPointData.h"
#include "vtkProperty.h"
#include "vtkTestUtilities.h"
#include "vtkRegressionTestImage.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkUnstructuredGrid.h"
#include "vtkXMLUnstructuredGridReader.h"
#include "vtkBridgeDataSet.h"
#include "vtkGenericGeometryFilter.h"
#include "vtkGenericCellTessellator.h"
#include "vtkGenericSubdivisionErrorMetric.h"
#include <cassert>
#include "vtkLookupTable.h"
#include "vtkPolyDataMapper.h"
#include "vtkPolyData.h"
#include "vtkGeometricErrorMetric.h"
#include "vtkAttributesErrorMetric.h"
#include "vtkSimpleCellTessellator.h"
#ifdef WRITE_GENERIC_RESULT
# include "vtkXMLPolyDataWriter.h"
#endif // #ifdef WRITE_GENERIC_RESULT
// Remark about the lookup tables that seem different between the
// GenericGeometryFilter and GenericDataSetTessellator:
// the lookup table is set for the whole unstructured grid, the tetra plus
// the triangle. The lookup table changed because of the tetra: the
// GenericDataSetTessellator need to create inside sub-tetra that have
// minimal attributes, the GenericGeometryFilter just need to tessellate the
// face of the tetra, for which the values at points are not minimal.
int TestGenericGeometryFilter(int argc, char* argv[])
{
// Standard rendering classes
vtkRenderer *renderer = vtkRenderer::New();
vtkRenderWindow *renWin = vtkRenderWindow::New();
renWin->AddRenderer(renderer);
vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
iren->SetRenderWindow(renWin);
// Load the mesh geometry and data from a file
vtkXMLUnstructuredGridReader *reader = vtkXMLUnstructuredGridReader::New();
char *cfname = vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/quadraticTetra01.vtu");
// char *cfname = vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/quadTet2.vtu");
// char *cfname = vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/Test2_Volume.vtu");
// char *cfname = vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/quadHexa01.vtu");
// char *cfname = vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/quadQuad01.vtu");
reader->SetFileName( cfname );
delete[] cfname;
// Force reading
reader->Update();
// Initialize the bridge
vtkBridgeDataSet *ds=vtkBridgeDataSet::New();
ds->SetDataSet( reader->GetOutput() );
reader->Delete();
// Set the error metric thresholds:
// 1. for the geometric error metric
vtkGeometricErrorMetric *geometricError=vtkGeometricErrorMetric::New();
geometricError->SetRelativeGeometricTolerance(0.1,ds);
ds->GetTessellator()->GetErrorMetrics()->AddItem(geometricError);
geometricError->Delete();
// 2. for the attribute error metric
vtkAttributesErrorMetric *attributesError=vtkAttributesErrorMetric::New();
attributesError->SetAttributeTolerance(0.01);
ds->GetTessellator()->GetErrorMetrics()->AddItem(attributesError);
attributesError->Delete();
cout<<"input unstructured grid: "<<ds<<endl;
static_cast<vtkSimpleCellTessellator *>(ds->GetTessellator())->SetMaxSubdivisionLevel(10);
vtkIndent indent;
ds->PrintSelf(cout,indent);
// Create the filter
vtkGenericGeometryFilter *geom = vtkGenericGeometryFilter::New();
geom->SetInputData(ds);
geom->SetPassThroughCellIds(1);
geom->Update(); //So that we can call GetRange() on the scalars
assert(geom->GetOutput()!=0);
// This creates a blue to red lut.
vtkLookupTable *lut = vtkLookupTable::New();
lut->SetHueRange (0.667, 0.0);
vtkPolyDataMapper *mapper = vtkPolyDataMapper::New();
mapper->SetLookupTable(lut);
mapper->SetInputConnection( geom->GetOutputPort() );
if(geom->GetOutput()->GetPointData()!=0)
{
if(geom->GetOutput()->GetPointData()->GetScalars()!=0)
{
mapper->SetScalarRange( geom->GetOutput()->GetPointData()->
GetScalars()->GetRange());
}
}
vtkActor *actor = vtkActor::New();
actor->SetMapper(mapper);
renderer->AddActor(actor);
#ifdef WRITE_GENERIC_RESULT
// Save the result of the filter in a file
vtkXMLPolyDataWriter *writer=vtkXMLPolyDataWriter::New();
writer->SetInputConnection(geom->GetOutputPort());
writer->SetFileName("geometry.vtp");
writer->SetDataModeToAscii();
writer->Write();
writer->Delete();
#endif // #ifdef WRITE_GENERIC_RESULT
// Standard testing code.
renderer->SetBackground(0.5,0.5,0.5);
renWin->SetSize(300,300);
renWin->Render();
int retVal = vtkRegressionTestImage( renWin );
if ( retVal == vtkRegressionTester::DO_INTERACTOR)
{
iren->Start();
}
// Cleanup
renderer->Delete();
renWin->Delete();
iren->Delete();
mapper->Delete();
actor->Delete();
geom->Delete();
ds->Delete();
lut->Delete();
return !retVal;
}
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