VTK/Examples/Cxx/StructuredData/GetLinearPointId

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GetLinearPointId.cxx

#include <vtkSmartPointer.h>
#include <vtkStructuredData.h>
#include <vtkStructuredGrid.h>

int main(int, char *[])
{
  // Create a grid
  vtkSmartPointer<vtkStructuredGrid> structuredGrid =
    vtkSmartPointer<vtkStructuredGrid>::New();

  // Set the dimensions of the grid
  {
    int dims[3] = {5,10,1};
    structuredGrid->SetDimensions(dims);
  }

  // Retrieve the dimensions of the grid
  int dimensions[3];
  structuredGrid->GetDimensions(dimensions);

  {
  int queryPoint[3] = {4, 0, 0};
  vtkIdType pointId = vtkStructuredData::ComputePointId(dimensions, queryPoint);

  std::cout << "PointId: " << pointId << std::endl; // Outputs '4'
  }
  
  {
  int queryPoint[3] = {0, 1, 0};
  vtkIdType pointId = vtkStructuredData::ComputePointId(dimensions, queryPoint);

  std::cout << "PointId: " << pointId << std::endl; // Outputs '5'
  }
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(GetLinearPointId)

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

add_executable(GetLinearPointId MACOSX_BUNDLE GetLinearPointId.cxx)

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

Download and Build GetLinearPointId

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

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

cd GetLinearPointId/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:

./GetLinearPointId

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.