ShotNoise

#include <vtkSmartPointer.h>
#include <vtkImageCanvasSource2D.h>
#include <vtkPNGWriter.h>

int main (int argc, char *argv[])
{
  vtkSmartPointer<vtkImageCanvasSource2D> imageCanvas =
    vtkSmartPointer<vtkImageCanvasSource2D>::New();

  imageCanvas->SetScalarTypeToUnsignedChar();
  imageCanvas->SetExtent(1, 256, 1, 256, 0, 0);
  imageCanvas->SetDrawColor(0.0);
  imageCanvas->FillBox(1, 256, 1, 256);
  imageCanvas->SetDrawColor(255.0);
  imageCanvas->FillBox(30, 225, 30, 225);
  imageCanvas->SetDrawColor(0.0);
  imageCanvas->FillBox(60, 195, 60, 195);
  imageCanvas->SetDrawColor(255.0);
  imageCanvas->FillTube(100, 100, 154, 154, 40.0);
  imageCanvas->SetDrawColor(0.0);
  imageCanvas->DrawSegment(45, 45, 45, 210);
  imageCanvas->DrawSegment(45, 210, 210, 210);
  imageCanvas->DrawSegment(210, 210, 210, 45);
  imageCanvas->DrawSegment(210, 45, 45, 45);
  imageCanvas->DrawSegment(100, 150, 150, 100);
  imageCanvas->DrawSegment(110, 160, 160, 110);
  imageCanvas->DrawSegment(90, 140, 140, 90);
  imageCanvas->DrawSegment(120, 170, 170, 120);
  imageCanvas->DrawSegment(80, 130, 130, 80);
  imageCanvas->Update();

  vtkSmartPointer<vtkPNGWriter> writer =
    vtkSmartPointer<vtkPNGWriter>::New();
  writer->SetInputConnection(imageCanvas->GetOutputPort());
  writer->SetFileName(argv[1]);
  writer->Write();
  return EXIT_SUCCESS;
  }

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(ShotNoise)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkIOImage
  vtkImagingSources QUIET)
if (NOT VTK_FOUND)
  message("Skipping ShotNoise: ${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(ShotNoise MACOSX_BUNDLE ShotNoise.cxx )
  target_link_libraries(ShotNoise PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(ShotNoise MACOSX_BUNDLE ShotNoise.cxx )
  target_link_libraries(ShotNoise PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS ShotNoise
    MODULES ${VTK_LIBRARIES}
    )
endif () 

cd ShotNoise/build 

cmake ..

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

make

./ShotNoise