IndividualVRML
VTKExamples/Cxx/IO/IndividualVRML
Description¶
This example shows how to obtain each object of a scene and get it's initial transformation. The selected actor is represented in wireframe. To run this example,
IndividualVRML filename actorname
The .wrl file must contain a Shape with a DEF name.
Code¶
IndividualVRML.cxx
#include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkVRMLImporter.h> #include <vtkDataSet.h> #include <vtkPolyData.h> #include <vtkSmartPointer.h> #include <vtkProperty.h> #include "vtkTransform.h" #include "vtkAxesActor.h" int main ( int argc, char *argv[]) { if(argc != 3) { std::cout << "Required arguments: Filename Actorname" << std::endl; return EXIT_FAILURE; } std::string filename = argv[1]; std::cout << "Showing " << argv[2] << " from " << filename << std::endl; vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); // VRML Import vtkSmartPointer<vtkVRMLImporter> importer = vtkSmartPointer<vtkVRMLImporter>::New(); importer->SetFileName ( filename.c_str() ); importer->Read(); importer->SetRenderWindow(renderWindow); importer->Update(); // ---------------------------------------------------------- vtkObject* defActor = importer->GetVRMLDEFObject(argv[2]); if (defActor == NULL) { std::cout << "Cannot locate actor " << argv[2] << " in " << filename << std::endl; importer->Print(std::cout); return EXIT_FAILURE; } vtkActor* actor = static_cast <vtkActor*> (defActor); double color[3] = {0.89,0.81,0.34}; actor->GetProperty()->SetColor(color); actor->GetProperty()->SetRepresentationToWireframe(); vtkSmartPointer<vtkTransform> transform = vtkSmartPointer<vtkTransform>::New(); transform->Translate(actor->GetCenter()[0], actor->GetCenter()[1], actor->GetCenter()[2]); // axes vtkSmartPointer<vtkAxesActor> axes = vtkSmartPointer<vtkAxesActor>::New(); double l[3]; l[0] = (actor->GetBounds()[1] - actor->GetBounds()[0]) * 1.5; l[1] = (actor->GetBounds()[3] - actor->GetBounds()[2]) * 1.5; l[2] = (actor->GetBounds()[5] - actor->GetBounds()[4]) * 1.5; axes->SetTotalLength(l); axes->SetUserTransform(transform); renderer->AddActor(axes); renderer->SetBackground( .2, .3, .7); renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(IndividualVRML) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(IndividualVRML MACOSX_BUNDLE IndividualVRML.cxx) target_link_libraries(IndividualVRML ${VTK_LIBRARIES})
Download and Build IndividualVRML¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
Click here to download IndividualVRML and its CMakeLists.txt file. Once the tarball IndividualVRML.tar has been downloaded and extracted,
cd IndividualVRML/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:
./IndividualVRML
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.