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# WalkCowB

VTKEx/Cxx/Rendering/WalkCowB

### Description

This generates Fig. 3-33b: The cow rotating about a vector passing through her nose.(b) With origin at (6.1,1.3,.02).

Info

See Figure 3-33b in Chapter 3 the VTK Textbook.

Other languages

See (Python)

Question

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

### Code

WalkCowB.cxx

    // These includes are necessary for WhatModulesVTK.py
    #include <vtkActor.h>
    #include <vtkAxes.h>
    #include <vtkBYUReader.h>
    #include <vtkCallbackCommand.h>
    #include <vtkCamera.h>
    #include <vtkNamedColors.h>
    #include <vtkPNGWriter.h>
    #include <vtkPolyDataMapper.h>
    #include <vtkProperty.h>
    #include <vtkRenderWindow.h>
    #include <vtkRenderWindowInteractor.h>
    #include <vtkRenderer.h>
    #include <vtkSmartPointer.h>
    #include <vtkTransform.h>
    #include <vtkVersionMacros.h>
    #include <vtkWindowToImageFilter.h>

    #include "WalkCow.cxx"

### CMakeLists.txt

    cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

    project(WalkCowB)

    find_package(VTK COMPONENTS
      vtkCommonColor
      vtkCommonCore
      vtkCommonTransforms
      vtkFiltersGeneral
      vtkIOGeometry
      vtkIOImage
      vtkInteractionStyle
      vtkRenderingContextOpenGL2
      vtkRenderingCore
      vtkRenderingFreeType
      vtkRenderingGL2PSOpenGL2
      vtkRenderingOpenGL2 QUIET)
    if (NOT VTK_FOUND)
      message("Skipping WalkCowB: ${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(WalkCowB MACOSX_BUNDLE WalkCowB.cxx )
      target_link_libraries(WalkCowB PRIVATE ${VTK_LIBRARIES})
    else ()
      # include all components
      add_executable(WalkCowB MACOSX_BUNDLE WalkCowB.cxx )
      target_link_libraries(WalkCowB PRIVATE ${VTK_LIBRARIES})
      # vtk_module_autoinit is needed
      vtk_module_autoinit(
        TARGETS WalkCowB
        MODULES ${VTK_LIBRARIES}
        )
    endif ()

### Download and Build WalkCowB

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

    cd WalkCowB/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:

    ./WalkCowB

WINDOWS USERS

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