MatrixInverse

Other Languages

See (Java)

Question

If you have a simple question about this example contact us at VTKExamplesProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum

Code¶

MatrixInverse.cxx

#include <vtkSmartPointer.h>
#include <vtkMatrix3x3.h>

int main(int, char *[])
{
  vtkSmartPointer<vtkMatrix3x3> m = 
    vtkSmartPointer<vtkMatrix3x3>::New();

  m->SetElement(2,1,2.0); // Set element (0,0) to 1.0

  std::cout << *m << std::endl;

  m->Invert();

  std::cout << *m << std::endl;

  return EXIT_SUCCESS;
}

CMakeLists.txt¶

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(MatrixInverse)

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

Download and Build MatrixInverse¶

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

cd MatrixInverse/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:

./MatrixInverse

WINDOWS USERS

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