Arbitrary3DCursor
VTKExamples/Cxx/Visualization/Arbitrary3DCursor
Code
Arbitrary3DCursor.cxx
#include <vtkVersion.h>
#include "vtkSmartPointer.h"
#include "vtkActor.h"
#include "vtkProperty.h"
#include "vtkCommand.h"
#include "vtkConeSource.h"
#include "vtkSphereSource.h"
#include "vtkGlyph3D.h"
#include "vtkPointWidget.h"
#include "vtkPolyData.h"
#include "vtkPolyDataMapper.h"
#include "vtkProbeFilter.h"
#include "vtkProperty.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkTextActor.h"
#include "vtkTextProperty.h"
#include "vtkXMLPolyDataReader.h"
#include <sstream>
// This does the actual work: updates the probe.
// Callback for the interaction
class vtkmyPWCallback : public vtkCommand
{
public:
static vtkmyPWCallback *New()
{
return new vtkmyPWCallback;
}
virtual void Execute(vtkObject *caller, unsigned long, void*)
{
vtkPointWidget *pointWidget = reinterpret_cast<vtkPointWidget*>(caller);
pointWidget->GetPolyData(this->PolyData);
double position[3];
pointWidget->GetPosition(position);
std::ostringstream text;
text << "cursor: "
<< std::fixed << std::setprecision(4)
<< position[0] << ", " << position[1] << ", " << position[2];
this->PositionActor->SetInput(text.str().c_str());
this->CursorActor->VisibilityOn();
}
vtkmyPWCallback():PolyData(0),CursorActor(0) {}
vtkPolyData *PolyData;
vtkActor *CursorActor;
vtkTextActor *PositionActor;
};
int main( int argc, char *argv[] )
{
vtkSmartPointer<vtkPolyData> inputPolyData;
if(argc > 1)
{
vtkSmartPointer<vtkXMLPolyDataReader> reader =
vtkSmartPointer<vtkXMLPolyDataReader>::New();
reader->SetFileName(argv[1]);
reader->Update();
inputPolyData = reader->GetOutput();
}
else
{
vtkSmartPointer<vtkSphereSource> sphereSource =
vtkSmartPointer<vtkSphereSource>::New();
sphereSource->SetPhiResolution(15);
sphereSource->SetThetaResolution(15);
sphereSource->Update();
inputPolyData = sphereSource->GetOutput();
}
vtkSmartPointer<vtkPolyData> point =
vtkSmartPointer<vtkPolyData>::New();
vtkSmartPointer<vtkProbeFilter> probe =
vtkSmartPointer<vtkProbeFilter>::New();
#if VTK_MAJOR_VERSION <= 5
probe->SetInput(point);
probe->SetSource(inputPolyData);
#else
probe->SetInputData(point);
probe->SetSourceData(inputPolyData);
#endif
// create glyph
vtkSmartPointer<vtkConeSource> cone =
vtkSmartPointer<vtkConeSource>::New();
cone->SetResolution(16);
vtkSmartPointer<vtkGlyph3D> glyph =
vtkSmartPointer<vtkGlyph3D>::New();
glyph->SetInputConnection(probe->GetOutputPort());
glyph->SetSourceConnection(cone->GetOutputPort());
glyph->SetVectorModeToUseVector();
glyph->SetScaleModeToDataScalingOff();
glyph->SetScaleFactor(inputPolyData->GetLength() * 0.1);
vtkSmartPointer<vtkPolyDataMapper> glyphMapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
glyphMapper->SetInputConnection(glyph->GetOutputPort());
vtkSmartPointer<vtkActor> glyphActor =
vtkSmartPointer<vtkActor>::New();
glyphActor->SetMapper(glyphMapper);
glyphActor->VisibilityOn();
vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
#if VTK_MAJOR_VERSION <= 5
mapper->SetInput(inputPolyData);
#else
mapper->SetInputData(inputPolyData);
#endif
vtkSmartPointer<vtkActor> actor =
vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);
actor->GetProperty()->SetRepresentationToWireframe();
actor->GetProperty()->SetColor(0.8900, 0.8100, 0.3400 );
vtkSmartPointer<vtkTextActor> textActor =
vtkSmartPointer<vtkTextActor>::New();
textActor->GetTextProperty()->SetFontSize ( 12 );
textActor->SetPosition ( 10, 20 );
textActor->SetInput ( "cursor:" );
textActor->GetTextProperty()->SetColor ( 1.0,0.0,0.0 );
// Create the RenderWindow, Render1er and both Actors
//
vtkSmartPointer<vtkRenderer> ren1 =
vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renWin =
vtkSmartPointer<vtkRenderWindow>::New();
renWin->AddRenderer(ren1);
vtkSmartPointer<vtkRenderWindowInteractor> iren =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
iren->SetRenderWindow(renWin);
// The SetInteractor method is how 3D widgets are associated with the render
// window interactor. Internally, SetInteractor sets up a bunch of callbacks
// using the Command/Observer mechanism (AddObserver()).
vtkSmartPointer<vtkmyPWCallback> myCallback =
vtkSmartPointer<vtkmyPWCallback>::New();
myCallback->PolyData = point;
myCallback->CursorActor = glyphActor;
myCallback->PositionActor = textActor;
// The point widget is used probe the dataset.
//
vtkSmartPointer<vtkPointWidget> pointWidget =
vtkSmartPointer<vtkPointWidget>::New();
pointWidget->SetInteractor(iren);
#if VTK_MAJOR_VERSION <= 5
pointWidget->SetInput(inputPolyData);
#else
pointWidget->SetInputData(inputPolyData);
#endif
pointWidget->AllOff();
pointWidget->PlaceWidget();
pointWidget->AddObserver(vtkCommand::InteractionEvent,myCallback);
ren1->AddActor(glyphActor);
ren1->AddActor(actor);
ren1->AddActor2D ( textActor );
// Add the actors to the renderer, set the background and size
//
ren1->SetBackground(0.1, 0.2, 0.4);
renWin->SetSize(300, 300);
renWin->Render();
pointWidget->On();
// render the image
//
iren->Initialize();
renWin->Render();
iren->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(Arbitrary3DCursor)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(Arbitrary3DCursor MACOSX_BUNDLE Arbitrary3DCursor.cxx)
target_link_libraries(Arbitrary3DCursor ${VTK_LIBRARIES})
Download and Build Arbitrary3DCursor
Click here to download Arbitrary3DCursor and its CMakeLists.txt file. Once the tarball Arbitrary3DCursor.tar has been downloaded and extracted,
cd Arbitrary3DCursor/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:
./Arbitrary3DCursor
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.