Box

Question

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

Code¶

Box.cxx

#include <vtkBox.h>

int main(int, char*[])
{
  // Define a box
  double bounds[6] = {-1, 1, -1, 1, -1, 1};

  // Define a ray
  double rayOrigin[3] = {-5.0, 0, 0};
  double rayDirection[3] = {1, 0, 0};

  double intersection[3];
  double t;

  auto hit =
      vtkBox::IntersectBox(bounds, rayOrigin, rayDirection, intersection, t);

  if (!hit)
  {
    std::cout << "Not hit!" << std::endl;
  }
  else
  {
    // Intersection should be (-1.0, 0, 0)
    std::cout << "Intersection is " << intersection[0] << " " << intersection[1]
              << " " << intersection[2] << std::endl;
    std::cout << "t is " << t << std::endl;
  }

  return EXIT_SUCCESS;
}

CMakeLists.txt¶

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(Box)

find_package(VTK COMPONENTS 
  vtkCommonDataModel
  QUIET
)

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

Download and Build Box¶

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

cd Box/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:

./Box

WINDOWS USERS

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