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/*=========================================================================
Program: Visualization Toolkit
Module: TestSurfaceLIC.h
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.
=========================================================================*/
#ifndef __TestSurfaceLIC_h
#define __TestSurfaceLIC_h
#include "vtkCamera.h"
#include "vtkCellData.h"
#include "vtkDataSetSurfaceFilter.h"
#include "vtkGenericDataObjectReader.h"
#include "vtkSurfaceLICPainter.h"
#include "vtkObjectFactory.h"
#include "vtkPainterPolyDataMapper.h"
#include "vtkPointData.h"
#include "vtkPolyData.h"
#include "vtkRegressionTestImage.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkSmartPointer.h"
#include "vtkTestUtilities.h"
#include "vtkXMLPolyDataReader.h"
#include <vtksys/CommandLineArguments.hxx>
#include <vtksys/SystemTools.hxx>
#include <vector>
#include <string>
#define VTK_CREATE_NEW(var, class) vtkSmartPointer<class> var = vtkSmartPointer<class>::New();
// This example demonstrates the use of vtkSurfaceLICPainter for rendering
// geometry with LIC on the surface.
enum { SURFACE_LIC_DEMO = 0, SURFACE_LIC_TEST = 1 };
int RenderingMode = SURFACE_LIC_TEST;
int SurfaceLIC( int argc, char * argv[] )
{
std::string filename;
int num_steps = 40;
double step_size = 0.4;
double lic_intensity = 0.8;
//std::string color_by;
std::string vectors;
vtksys::CommandLineArguments arg;
arg.StoreUnusedArguments(1);
arg.Initialize(argc, argv);
// Fill up accepted arguments.
typedef vtksys::CommandLineArguments argT;
arg.AddArgument("--data", argT::EQUAL_ARGUMENT, &filename,
"(required) Enter dataset to load (currently only *.[vtk|vtp] files are supported");
arg.AddArgument("--num-steps", argT::EQUAL_ARGUMENT, &num_steps,
"(optional: default 40) Number of steps in each direction");
arg.AddArgument("--step-size", argT::EQUAL_ARGUMENT, &step_size,
"(optional: default 0.4) Step size in pixels");
arg.AddArgument("--lic-intensity", argT::EQUAL_ARGUMENT, &lic_intensity,
"(optional: default 0.8) Contribution of LIC in the final image [1.0 == max contribution]");
//arg.AddArgument("--color-by", argT::EQUAL_ARGUMENT, &color_by,
// "(optional: default active scalars) Name of the array to color by");
arg.AddArgument("--vectors", argT::EQUAL_ARGUMENT, &vectors,
"(optional: default active point vectors) Name of the vector field array");
if (!arg.Parse() || filename == "")
{
cerr << "Usage: " << endl;
cerr << arg.GetHelp() << endl;
return 1;
}
vtkSmartPointer<vtkPolyData> polydata;
std::string ext = vtksys::SystemTools::GetFilenameExtension(filename);
if (ext == ".vtk")
{
vtkGenericDataObjectReader* reader = vtkGenericDataObjectReader::New();
reader->SetFileName(filename.c_str());
vtkDataSetSurfaceFilter* surface = vtkDataSetSurfaceFilter::New();
surface->SetInputConnection(reader->GetOutputPort());
surface->Update();
polydata = surface->GetOutput();
reader->Delete();
surface->Delete();
}
else if (ext == ".vtp")
{
vtkXMLPolyDataReader* reader = vtkXMLPolyDataReader::New();
reader->SetFileName(filename.c_str());
reader->Update();
polydata = reader->GetOutput();
reader->Delete();
}
else
{
cerr << "Error: Unknown extension: '" << ext << "'"<< endl;
return 1;
}
if (!polydata || polydata->GetNumberOfPoints() == 0)
{
cerr << "Error reading file: '" << filename.c_str() << "'" << endl;
return 1;
}
// Set up the render window, renderer, interactor.
VTK_CREATE_NEW(renWin, vtkRenderWindow);
VTK_CREATE_NEW(renderer, vtkRenderer);
VTK_CREATE_NEW(iren, vtkRenderWindowInteractor);
renWin->SetReportGraphicErrors(1);
renWin->AddRenderer(renderer);
renWin->SetSize(300,300);
iren->SetRenderWindow(renWin);
renWin->Render();
if (!vtkSurfaceLICPainter::IsSupported(renWin))
{
cout << "WARNING: The rendering context does not support required "
"extensions." << endl;
return 0;
}
// Create a mapper and insert the vtkSurfaceLICPainter painter into the
// painter chain. This is essential since the entire logic of performin the
// LIC is present in the vtkSurfaceLICPainter.
VTK_CREATE_NEW(mapper, vtkPainterPolyDataMapper);
VTK_CREATE_NEW(painter, vtkSurfaceLICPainter);
painter->SetDelegatePainter(mapper->GetPainter());
mapper->SetPainter(painter);
// If user chose a vector field, select it.
if (vectors != "")
{
painter->SetInputArrayToProcess(
vtkDataObject::FIELD_ASSOCIATION_POINTS_THEN_CELLS,
vectors.c_str());
}
else if (!polydata->GetPointData()->GetVectors() &&
!polydata->GetCellData()->GetVectors())
{
cerr << "ERROR: No active vectors are available." << endl<<
" Please select the vectors array using '--vectors'" << endl;
return 1;
}
// Pass parameters.
painter->SetLICIntensity(lic_intensity);
painter->SetNumberOfSteps(num_steps);
painter->SetStepSize(step_size);
// Set the mapper input
mapper->SetInputData(polydata);
VTK_CREATE_NEW(actor, vtkActor);
actor->SetMapper(mapper);
renderer->AddActor(actor);
renderer->SetBackground(0.3, 0.3, 0.3);
if ( RenderingMode )
{
// Code used for regression testing.
renderer->GetActiveCamera()->SetFocalPoint(-1.88, -0.98, -1.04);
renderer->GetActiveCamera()->SetPosition(13.64, 4.27, -31.59);
renderer->GetActiveCamera()->SetViewAngle(30);
renderer->GetActiveCamera()->SetViewUp(0.41, 0.83, 0.35);
renderer->ResetCamera();
renWin->Render();
if ( painter->GetLICSuccess() == 0 ||
painter->GetRenderingPreparationSuccess() == 0 )
{
return 0;
}
int retVal = vtkTesting::Test(argc, argv, renWin, 75);
if (retVal == vtkRegressionTester::DO_INTERACTOR)
{
iren->Start();
}
if ((retVal == vtkTesting::PASSED) || (retVal == vtkTesting::DO_INTERACTOR))
{
return 0;
}
// failed.
return 1;
}
else
{
renderer->ResetCamera();
renWin->Render();
if ( painter->GetLICSuccess() == 0 ||
painter->GetRenderingPreparationSuccess() == 0 )
{
return 0;
}
iren->Start();
}
// failed.
return 0;
}
#endif
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