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 3.12 FATAL_ERROR)

project(2DArray)

find_package(VTK COMPONENTS 
)

if (NOT VTK_FOUND)
  message(FATAL_ERROR "2DArray: 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(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}
)

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.