ConstructTree
vtk-examples/Cxx/Graphs/ConstructTree
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See (Python)
Question
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Code¶
ConstructTree.cxx
#include <vtkGraphLayoutView.h>
#include <vtkMutableDirectedGraph.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkTree.h>
int main(int, char*[])
{
vtkNew<vtkNamedColors> colors;
vtkNew<vtkMutableDirectedGraph> graph;
vtkIdType v1 = graph->AddVertex();
vtkIdType v2 = graph->AddChild(v1);
graph->AddChild(v1);
graph->AddChild(v2);
/*
//equivalent to:
vtkIdType V1 = g->AddVertex();
vtkIdType V2 = g->AddVertex();
vtkIdType V3 = g->AddVertex();
vtkIdType V4 = g->AddVertex();
g->AddEdge ( V1, V2 );
g->AddEdge ( V1, V3 );
g->AddEdge ( V2, V4 );
*/
vtkNew<vtkTree> tree;
bool success = tree->CheckedShallowCopy(graph);
std::cout << "Success? " << success << std::endl;
vtkNew<vtkGraphLayoutView> treeLayoutView;
treeLayoutView->AddRepresentationFromInput(tree);
treeLayoutView->SetLayoutStrategyToTree();
treeLayoutView->ResetCamera();
treeLayoutView->GetRenderer()->SetBackground(
colors->GetColor3d("Navy").GetData());
treeLayoutView->GetRenderer()->SetBackground2(
colors->GetColor3d("MidnightBlue").GetData());
treeLayoutView->GetRenderWindow()->SetWindowName("ConstructTree");
treeLayoutView->Render();
treeLayoutView->GetInteractor()->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(ConstructTree)
find_package(VTK COMPONENTS
vtkCommonColor
vtkCommonCore
vtkCommonDataModel
vtkInteractionStyle
vtkRenderingContextOpenGL2
vtkRenderingCore
vtkRenderingFreeType
vtkRenderingGL2PSOpenGL2
vtkRenderingOpenGL2
vtkViewsInfovis
QUIET
)
if (NOT VTK_FOUND)
message("Skipping ConstructTree: ${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(ConstructTree MACOSX_BUNDLE ConstructTree.cxx )
target_link_libraries(ConstructTree PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(ConstructTree MACOSX_BUNDLE ConstructTree.cxx )
target_link_libraries(ConstructTree PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS ConstructTree
MODULES ${VTK_LIBRARIES}
)
endif ()
Download and Build ConstructTree¶
Click here to download ConstructTree and its CMakeLists.txt file. Once the tarball ConstructTree.tar has been downloaded and extracted,
cd ConstructTree/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:
./ConstructTree
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.