ParticleReader
vtk-examples/Cxx/IO/ParticleReader
Description¶
This example reads ascii files where each line consists of points with its position (x,y,z) and (optionally) one scalar or binary files in RAW 3d file format.
Question
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Code¶
ParticleReader.cxx
//
// This example reads ascii files where each line consists of points with its
// position (x,y,z) and (optionally) one scalar or binary files in RAW 3d file
// format.
//
// some standard vtk headers
#include <vtkActor.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkParticleReader.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
// needed to easily convert int to std::string
int main(int argc, char* argv[])
{
vtkNew<vtkNamedColors> colors;
// Verify input arguments
if (argc != 2)
{
std::cout << "Usage: " << argv[0] << " Filename(.raw) e.g. Particles.raw"
<< std::endl;
return EXIT_FAILURE;
}
std::string filePath = argv[1];
// Particles.raw supplied by VTK is big endian encoded
// std::string filePath = "C:\\VTK\\vtkdata-5.8.0\\Data\\Particles.raw";
// Read the file
vtkNew<vtkParticleReader> reader;
reader->SetFileName(filePath.c_str());
// if nothing gets displayed or totally wrong, swap the endianness
reader->SetDataByteOrderToBigEndian();
reader->Update();
// Visualize
vtkNew<vtkPolyDataMapper> mapper;
mapper->SetInputConnection(reader->GetOutputPort());
std::cout << "number of pieces: " << mapper->GetNumberOfPieces() << std::endl;
mapper->SetScalarRange(4, 9);
vtkNew<vtkActor> actor;
actor->SetMapper(mapper);
actor->GetProperty()->SetPointSize(4);
vtkNew<vtkRenderer> renderer;
vtkNew<vtkRenderWindow> renderWindow;
renderWindow->AddRenderer(renderer);
renderWindow->SetWindowName("ParticleReader");
vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
renderWindowInteractor->SetRenderWindow(renderWindow);
renderer->AddActor(actor);
renderer->SetBackground(colors->GetColor3d("DarkSlateGray").GetData());
renderWindow->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(ParticleReader)
find_package(VTK COMPONENTS
vtkCommonColor
vtkCommonCore
vtkIOGeometry
vtkInteractionStyle
vtkRenderingContextOpenGL2
vtkRenderingCore
vtkRenderingFreeType
vtkRenderingGL2PSOpenGL2
vtkRenderingOpenGL2
QUIET
)
if (NOT VTK_FOUND)
message("Skipping ParticleReader: ${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(ParticleReader MACOSX_BUNDLE ParticleReader.cxx )
target_link_libraries(ParticleReader PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(ParticleReader MACOSX_BUNDLE ParticleReader.cxx )
target_link_libraries(ParticleReader PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS ParticleReader
MODULES ${VTK_LIBRARIES}
)
endif ()
Download and Build ParticleReader¶
Click here to download ParticleReader and its CMakeLists.txt file. Once the tarball ParticleReader.tar has been downloaded and extracted,
cd ParticleReader/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:
./ParticleReader
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.