StripFran
VTKExamples/Cxx/Rendering/StripFran
Description¶
Triangle strip examples. Left, structured triangle mesh consisting of 134 strips each of 390 triangles. Right, Unstructured triangle mesh consisting of 2227 strips of average length 3.94, longest strip 101 triangles. Images are generated by displaying every other triangle strip.
Info
See Figure 9-21 in Chapter 9 The VTK Textbook.
Other Languages
See (Python)
Code¶
StripFran.cxx
#include <vtkActor.h> #include <vtkCamera.h> #include <vtkDecimatePro.h> #include <vtkMaskPolyData.h> #include <vtkNamedColors.h> #include <vtkPolyDataMapper.h> #include <vtkPolyDataNormals.h> #include <vtkPolyDataReader.h> #include <vtkProperty.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> #include <vtkStripper.h> int main (int argc, char *argv[]) { if (argc < 2) { std::cout << "Usage: " << argv[0] << " fran_cut.vtk" << std::endl; return EXIT_FAILURE; } // Create the RenderWindow, Renderer and both Actors // vtkSmartPointer<vtkNamedColors> colors = vtkSmartPointer<vtkNamedColors>::New(); vtkSmartPointer<vtkRenderer> renderer1 = vtkSmartPointer<vtkRenderer>::New(); renderer1->SetViewport( 0., 0., 0.5, 1. ); vtkSmartPointer<vtkRenderer> renderer2 = vtkSmartPointer<vtkRenderer>::New(); renderer2->SetViewport( 0.5, 0., 1., 1. ); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer1); renderWindow->AddRenderer(renderer2); vtkSmartPointer<vtkRenderWindowInteractor> interactor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); interactor->SetRenderWindow(renderWindow); // create a cyberware source // vtkSmartPointer<vtkPolyDataReader> cyber = vtkSmartPointer<vtkPolyDataReader>::New(); cyber->SetFileName(argv[1]); vtkSmartPointer<vtkDecimatePro> deci = vtkSmartPointer<vtkDecimatePro>::New(); deci->SetInputConnection(cyber->GetOutputPort()); deci->SetTargetReduction(0.7); deci->PreserveTopologyOn(); vtkSmartPointer<vtkPolyDataNormals> normals = vtkSmartPointer<vtkPolyDataNormals>::New(); normals->SetInputConnection(deci->GetOutputPort()); vtkSmartPointer<vtkMaskPolyData> mask = vtkSmartPointer<vtkMaskPolyData>::New(); mask->SetInputConnection(deci->GetOutputPort()); mask->SetOnRatio(2); vtkSmartPointer<vtkPolyDataMapper> cyberMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); cyberMapper->SetInputConnection(mask->GetOutputPort()); vtkSmartPointer<vtkActor> cyberActor = vtkSmartPointer<vtkActor>::New(); cyberActor->SetMapper(cyberMapper); cyberActor->GetProperty()->SetColor(colors->GetColor3d("Flesh").GetData()); vtkSmartPointer<vtkStripper> stripper = vtkSmartPointer<vtkStripper>::New(); stripper->SetInputConnection(cyber->GetOutputPort()); vtkSmartPointer<vtkMaskPolyData> stripperMask = vtkSmartPointer<vtkMaskPolyData>::New(); stripperMask->SetInputConnection(stripper->GetOutputPort()); stripperMask->SetOnRatio(2); vtkSmartPointer<vtkPolyDataMapper> stripperMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); stripperMapper->SetInputConnection(stripperMask->GetOutputPort()); vtkSmartPointer<vtkActor> stripperActor = vtkSmartPointer<vtkActor>::New(); stripperActor->SetMapper(stripperMapper); stripperActor->GetProperty()->SetColor(colors->GetColor3d("Flesh").GetData()); // Add the actors to the renderer, set the background and size // renderer1->AddActor(stripperActor); renderer2->AddActor(cyberActor); renderer1->SetBackground(colors->GetColor3d("Wheat").GetData()); renderer2->SetBackground(colors->GetColor3d("Papaya_Whip").GetData()); renderWindow->SetSize(1024, 640); // render the image // vtkSmartPointer<vtkCamera> cam1 = vtkSmartPointer<vtkCamera>::New(); cam1->SetFocalPoint(0, 0, 0); cam1->SetPosition(1, 0, 0); cam1->SetViewUp(0, 1, 0); renderer1->SetActiveCamera(cam1); renderer2->SetActiveCamera(cam1); renderer1->ResetCamera(); cam1->Azimuth(30); cam1->Elevation(30); cam1->Dolly(1.4); renderer1->ResetCameraClippingRange(); interactor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(StripFran) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(StripFran MACOSX_BUNDLE StripFran.cxx ) target_link_libraries(StripFran ${VTK_LIBRARIES})
Download and Build StripFran¶
Click here to download StripFran and its CMakeLists.txt file. Once the tarball StripFran.tar has been downloaded and extracted,
cd StripFran/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:
./StripFran
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.