PineRootConnectivityA

vtk-examples/Cxx/VisualizationAlgorithms/PineRootConnectivityA

Description¶

This example applies connectivity filter to remove noisy isosurface. Data is from 256^3 volume data of the root system of a pine tree.

The example runs PineRootConnectivity as follows:

PineRootConnectivityA pine_root.tri 1

Info

See Figure 9-51a in Chapter 9 The VTK Textbook.

Other languages

See (Python)

Question

If you have a question about this example, please use the VTK Discourse Forum

Code¶

PineRootConnectivityA.cxx

#include <vtkActor.h>
#include <vtkCamera.h>
#include <vtkNamedColors.h>
#include <vtkPointData.h>
#include <vtkPointSource.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkStreamTracer.h>
#include <vtkStructuredGrid.h>
#include <vtkStructuredGridGeometryFilter.h>
#include <vtkStructuredGridOutlineFilter.h>
#include <vtkStructuredGridReader.h>

#include "PineRootConnectivity.cxx"

CMakeLists.txt¶

cmake_minimum_required(VERSION 3.12 FATAL_ERROR)

project(PineRootConnectivityA)

find_package(VTK COMPONENTS 
  vtkCommonColor
  vtkCommonDataModel
  vtkFiltersCore
  vtkFiltersFlowPaths
  vtkFiltersGeometry
  vtkFiltersSources
  vtkIOLegacy
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping PineRootConnectivityA: ${VTK_NOT_FOUND_MESSAGE}")
  return()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(PineRootConnectivityA MACOSX_BUNDLE PineRootConnectivityA.cxx )
  target_link_libraries(PineRootConnectivityA PRIVATE ${VTK_LIBRARIES})
else()
  # 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(PineRootConnectivityA MACOSX_BUNDLE PineRootConnectivityA.cxx )
  target_link_libraries(PineRootConnectivityA PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS PineRootConnectivityA
    MODULES ${VTK_LIBRARIES}
    )
endif()

Download and Build PineRootConnectivityA¶

Click here to download PineRootConnectivityA and its CMakeLists.txt file. Once the tarball PineRootConnectivityA.tar has been downloaded and extracted,

cd PineRootConnectivityA/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:

./PineRootConnectivityA

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.