Arrow
vtk-examples/Cxx/GeometricObjects/Arrow
Description¶
vtkArrowSource object appends a cylinder to a cone to form an arrow.
The shaft base is always at (0,0,0). The arrow tip is always at (1,0,0). If "Invert" is true, then the ends are flipped i.e. tip is at (0,0,0) while base is at (1, 0, 0).
The resolution of the cone and shaft can be set and default to 6.
The radius of the cone and shaft can be set and default to 0.03 and 0.1. The length of the tip can also be set, and defaults to 0.35.
Question
If you have a question about this example, please use the VTK Discourse Forum
Code¶
Arrow.cxx
#include <vtkActor.h>
#include <vtkArrowSource.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
int main(int, char*[])
{
vtkNew<vtkNamedColors> colors;
// Create an arrow.
vtkNew<vtkArrowSource> arrowSource;
// arrowSource->SetShaftRadius(1.0);
// arrowSource->SetTipLength(1.0);
arrowSource->Update();
// Create a mapper and actor
vtkNew<vtkPolyDataMapper> mapper;
mapper->SetInputConnection(arrowSource->GetOutputPort());
vtkNew<vtkActor> actor;
actor->SetMapper(mapper);
// Visualize
vtkNew<vtkRenderer> renderer;
vtkNew<vtkRenderWindow> renderWindow;
renderWindow->SetWindowName("Arrow");
renderWindow->AddRenderer(renderer);
vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
renderWindowInteractor->SetRenderWindow(renderWindow);
renderer->AddActor(actor);
renderer->SetBackground(colors->GetColor3d("MidnightBlue").GetData());
renderWindow->SetWindowName("Arrow");
renderWindow->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(Arrow)
find_package(VTK COMPONENTS
vtkCommonColor
vtkCommonCore
vtkCommonDataModel
vtkFiltersSources
vtkInteractionStyle
vtkRenderingContextOpenGL2
vtkRenderingCore
vtkRenderingFreeType
vtkRenderingGL2PSOpenGL2
vtkRenderingOpenGL2
QUIET
)
if (NOT VTK_FOUND)
message("Skipping Arrow: ${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(Arrow MACOSX_BUNDLE Arrow.cxx )
target_link_libraries(Arrow PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(Arrow MACOSX_BUNDLE Arrow.cxx )
target_link_libraries(Arrow PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS Arrow
MODULES ${VTK_LIBRARIES}
)
endif ()
Download and Build Arrow¶
Click here to download Arrow and its CMakeLists.txt file. Once the tarball Arrow.tar has been downloaded and extracted,
cd Arrow/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:
./Arrow
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.