HeadBone
vtk-examples/Cxx/VisualizationAlgorithms/HeadBone
Description¶
This example generates an isosurface of human bone.
Info
See Figure 6-11b in Chapter 6 the VTK Textbook.
Other languages
See (Python)
Question
If you have a question about this example, please use the VTK Discourse Forum
Code¶
HeadBone.cxx
#include <vtkActor.h>
#include <vtkCamera.h>
#include <vtkMergePoints.h>
#include <vtkMetaImageReader.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkOutlineFilter.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkVersion.h>
// vtkFlyingEdges3D was introduced in VTK >= 8.2
#if VTK_MAJOR_VERSION >= 9 || (VTK_MAJOR_VERSION >= 8 && VTK_MINOR_VERSION >= 2)
#define USE_FLYING_EDGES
#else
#undef USE_FLYING_EDGES
#endif
#ifdef USE_FLYING_EDGES
#include <vtkFlyingEdges3D.h>
#else
#include <vtkMarchingCubes.h>
#endif
#include <iostream>
#include <string>
int main(int argc, char* argv[])
{
if (argc < 2)
{
std::cout << "Usage: " << argv[0] << " FullHead.mhd" << std::endl;
return EXIT_FAILURE;
}
// Create the RenderWindow, Renderer and both Actors.
//
vtkNew<vtkNamedColors> colors;
vtkNew<vtkRenderer> ren1;
vtkNew<vtkRenderWindow> renWin;
renWin->AddRenderer(ren1);
vtkNew<vtkRenderWindowInteractor> iren;
iren->SetRenderWindow(renWin);
// Create pipeline.
//
vtkNew<vtkMetaImageReader> reader;
reader->SetFileName(argv[1]);
reader->Update();
vtkNew<vtkMergePoints> locator;
locator->SetDivisions(64, 64, 92);
locator->SetNumberOfPointsPerBucket(2);
locator->AutomaticOff();
#ifdef USE_FLYING_EDGES
vtkNew<vtkFlyingEdges3D> iso;
#else
vtkNew<vtkMarchingCubes> iso;
#endif
iso->SetInputConnection(reader->GetOutputPort());
iso->ComputeGradientsOn();
iso->ComputeScalarsOff();
iso->SetValue(0, 1150);
#ifndef USE_FLYING_EDGES
iso->SetLocator(locator);
#endif
vtkNew<vtkPolyDataMapper> isoMapper;
isoMapper->SetInputConnection(iso->GetOutputPort());
isoMapper->ScalarVisibilityOff();
vtkNew<vtkActor> isoActor;
isoActor->SetMapper(isoMapper);
isoActor->GetProperty()->SetColor(colors->GetColor3d("Ivory").GetData());
vtkNew<vtkOutlineFilter> outline;
outline->SetInputConnection(reader->GetOutputPort());
vtkNew<vtkPolyDataMapper> outlineMapper;
outlineMapper->SetInputConnection(outline->GetOutputPort());
vtkNew<vtkActor> outlineActor;
outlineActor->SetMapper(outlineMapper);
// Add the actors to the renderer, set the background and size.
//
ren1->AddActor(outlineActor);
ren1->AddActor(isoActor);
ren1->SetBackground(colors->GetColor3d("SlateGray").GetData());
ren1->GetActiveCamera()->SetFocalPoint(0, 0, 0);
ren1->GetActiveCamera()->SetPosition(0, -1, 0);
ren1->GetActiveCamera()->SetViewUp(0, 0, -1);
ren1->ResetCamera();
ren1->GetActiveCamera()->Dolly(1.5);
ren1->ResetCameraClippingRange();
renWin->SetSize(640, 480);
renWin->SetWindowName("HeadBone");
renWin->Render();
iren->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
project(HeadBone)
find_package(VTK COMPONENTS
)
if (NOT VTK_FOUND)
message(FATAL_ERROR "HeadBone: Unable to find the VTK build folder.")
endif()
# Prevent a "command line is too long" failure in Windows.
set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
add_executable(HeadBone MACOSX_BUNDLE HeadBone.cxx )
target_link_libraries(HeadBone PRIVATE ${VTK_LIBRARIES}
)
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS HeadBone
MODULES ${VTK_LIBRARIES}
)
Download and Build HeadBone¶
Click here to download HeadBone and its CMakeLists.txt file. Once the tarball HeadBone.tar has been downloaded and extracted,
cd HeadBone/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:
./HeadBone
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.