VTK/Examples/Cxx/Math/PerpendicularVector

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PerpendicularVector.cxx

This example finds a vector perpendicular to the x axis (1,0,0). Since theta is specified as 0, the negative z axis (0, 0, -1) is returned.

#include <vtkSmartPointer.h>
#include <vtkMath.h>

int main(int, char *[])
{
  double x[3] = {1,0,0};
  double y[3];
  vtkMath::Perpendiculars(x, y, NULL, 0);

  std::cout << "y: " << y[0] << " " << y[1] << " " << y[2] << std::endl;
  
  return EXIT_SUCCESS;
}

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CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(PerpendicularVector)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(PerpendicularVector MACOSX_BUNDLE PerpendicularVector.cxx)

if(VTK_LIBRARIES)
  target_link_libraries(PerpendicularVector ${VTK_LIBRARIES})
else()
  target_link_libraries(PerpendicularVector vtkHybrid vtkWidgets)
endif()

Download and Build PerpendicularVector

Click here to download PerpendicularVector. and its CMakeLists.txt file.

Once the tarball PerpendicularVector.tar has been downloaded and extracted,

cd PerpendicularVector/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:

./PerpendicularVector

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