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2DArray

vtk-examples/Cxx/Utilities/2DArray

Description

This example creates a 5x5 2D array and sets the (4,4) (zero based indexing, of course) entry to 5.0. Then it outputs this value to demonstrate accessing.

Question

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

Code

2DArray.cxx

#include <vtkDenseArray.h>
#include <vtkNew.h>

int main(int, char*[])
{
  vtkNew<vtkDenseArray<double>> array;

  array->Resize(5, 5);

  array->SetValue(4, 4, 5.0);

  std::cout << array->GetValue(4, 4) << std::endl;

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(2DArray)

find_package(VTK COMPONENTS 
  vtkCommonCore
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping 2DArray: ${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(2DArray MACOSX_BUNDLE 2DArray.cxx )
  target_link_libraries(2DArray PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(2DArray MACOSX_BUNDLE 2DArray.cxx )
  target_link_libraries(2DArray PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS 2DArray
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build 2DArray

Click here to download 2DArray and its CMakeLists.txt file. Once the tarball 2DArray.tar has been downloaded and extracted,

cd 2DArray/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:

./2DArray

WINDOWS USERS

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