AttachAttributes
vtk-examples/Cxx/PolyData/AttachAttributes
Question
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Code¶
AttachAttributes.cxx
// vtk includes
#include <vtkDoubleArray.h>
#include <vtkInformation.h>
#include <vtkInformationDoubleVectorKey.h>
#include <vtkNew.h>
// std includes
#include <iostream>
int main(int, char*[])
{
// create a 2-element array
vtkNew<vtkDoubleArray> array;
array->SetName("array");
array->SetNumberOfComponents(1);
array->SetNumberOfTuples(2);
array->SetValue(0, 1.);
array->SetValue(1, 2.);
// access the info (presently none stored)
vtkInformation* info = array->GetInformation();
// add one attribute, a double vector
const char* name = "myKey";
const char* location = "MyClass"; //
const int length = 3;
vtkInformationDoubleVectorKey* key =
new vtkInformationDoubleVectorKey(name, location, length);
double values[] = {0.1, 0.2, 0.3};
info->Set(key, values[0], values[1], values[2]);
// extract the key
double* vals = info->Get(key);
std::cout << "extracted values are: " << vals[0] << ", " << vals[1] << ", "
<< vals[2] << '\n';
return EXIT_SUCCESS;
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(AttachAttributes)
find_package(VTK COMPONENTS
vtkCommonCore
QUIET
)
if (NOT VTK_FOUND)
message("Skipping AttachAttributes: ${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(AttachAttributes MACOSX_BUNDLE AttachAttributes.cxx )
target_link_libraries(AttachAttributes PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(AttachAttributes MACOSX_BUNDLE AttachAttributes.cxx )
target_link_libraries(AttachAttributes PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS AttachAttributes
MODULES ${VTK_LIBRARIES}
)
endif ()
Download and Build AttachAttributes¶
Click here to download AttachAttributes and its CMakeLists.txt file. Once the tarball AttachAttributes.tar has been downloaded and extracted,
cd AttachAttributes/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:
./AttachAttributes
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.