ContourTriangulator
VTKExamples/Cxx/Modelling/ContourTriangulator
Code
ContourTriangulator.cxx
#include "vtkSmartPointer.h"
#include "vtkContourTriangulator.h"
#include "vtkMarchingSquares.h"
#include "vtkActor.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkPNGReader.h"
#include "vtkDataSetMapper.h"
#include "vtkCamera.h"
#include "vtkProperty.h"
int main(int argc, char* argv[])
{
std::string inputFileName;
if (argc > 1 )
{
inputFileName = argv[1];
}
int isoValue = 500;
if (argc > 2)
{
isoValue = atoi(argv[2]);
}
vtkSmartPointer<vtkPNGReader> reader =
vtkSmartPointer<vtkPNGReader>::New();
if (!reader->CanReadFile(inputFileName.c_str()))
{
std::cerr << "Error: Could not read " << inputFileName << ".\n";
return EXIT_FAILURE;
}
reader->SetFileName(inputFileName.c_str());
reader->Update();
vtkSmartPointer<vtkMarchingSquares> iso =
vtkSmartPointer<vtkMarchingSquares>::New();
iso->SetInputConnection(reader->GetOutputPort());
iso->SetValue(0, isoValue);
vtkSmartPointer<vtkDataSetMapper> isoMapper =
vtkSmartPointer<vtkDataSetMapper>::New();
isoMapper->SetInputConnection(iso->GetOutputPort());
isoMapper->ScalarVisibilityOff();
vtkSmartPointer<vtkActor> isoActor =
vtkSmartPointer<vtkActor>::New();
isoActor->SetMapper(isoMapper);
isoActor->GetProperty()->SetColor(0.8900, 0.8100, 0.3400);
vtkSmartPointer<vtkContourTriangulator> poly =
vtkSmartPointer<vtkContourTriangulator>::New();
poly->SetInputConnection(iso->GetOutputPort());
vtkSmartPointer<vtkDataSetMapper> polyMapper =
vtkSmartPointer<vtkDataSetMapper>::New();
polyMapper->SetInputConnection(poly->GetOutputPort());
polyMapper->ScalarVisibilityOff();
vtkSmartPointer<vtkActor> polyActor =
vtkSmartPointer<vtkActor>::New();
polyActor->SetMapper(polyMapper);
polyActor->GetProperty()->SetColor(1.0000, 0.3882, 0.2784);
// Standard rendering classes
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renWin =
vtkSmartPointer<vtkRenderWindow>::New();
renWin->SetMultiSamples(0);
renWin->AddRenderer(renderer);
vtkSmartPointer<vtkRenderWindowInteractor> iren =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
iren->SetRenderWindow(renWin);
renderer->AddActor(polyActor);
renderer->AddActor(isoActor);
// Standard testing code.
renderer->SetBackground(0.5,0.5,0.5);
renWin->SetSize(300,300);
vtkCamera *camera = renderer->GetActiveCamera();
renderer->ResetCamera();
camera->Azimuth(180);
iren->Initialize();
iren->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(ContourTriangulator)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(ContourTriangulator MACOSX_BUNDLE ContourTriangulator.cxx)
target_link_libraries(ContourTriangulator ${VTK_LIBRARIES})
Download and Build ContourTriangulator
Click here to download ContourTriangulator and its CMakeLists.txt file. Once the tarball ContourTriangulator.tar has been downloaded and extracted,
cd ContourTriangulator/build
If VTK is installed:
cmake ..
If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
cmake -DVTK_DIR:PATH=/home/me/vtk_build ..
Build the project:
make
and run it:
./ContourTriangulator
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.