CompositePolyDataMapper
VTKExamples/Cxx/CompositeData/CompositePolyDataMapper
Code
CompositePolyDataMapper.cxx
#include <vtkMultiBlockDataSet.h>
#include <vtkSphereSource.h>
#include <vtkNew.h>
#include <vtkCompositePolyDataMapper2.h>
#include <vtkCompositeDataDisplayAttributes.h>
#include <vtkActor.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
int main( int argc, char *argv[] )
{
vtkNew<vtkSphereSource> sphere1;
sphere1->SetRadius(3);
sphere1->SetCenter(0,0,0);
sphere1->Update();
vtkNew<vtkSphereSource> sphere2;
sphere2->SetRadius(2);
sphere2->SetCenter(2,0,0);
sphere2->Update();
vtkNew<vtkMultiBlockDataSet> mbds;
mbds->SetNumberOfBlocks(3);
mbds->SetBlock(0, sphere1->GetOutput());
// Leave block 1 NULL. NULL blocks are valid and should be handled by
// algorithms that process multiblock datasets. Especially when
// running in parallel where the blocks owned by other processes are
// NULL in this process.
mbds->SetBlock(2, sphere2->GetOutput());
vtkNew<vtkCompositePolyDataMapper2> mapper;
mapper->SetInputData((vtkPolyData*)mbds.Get());
vtkNew<vtkCompositeDataDisplayAttributes> cdsa;
// You can use the vtkCompositeDataDisplayAttributes to set the color
// opacity and visibiliy of individual blocks of the multiblock dataset.
// This sets the block at flat index 3 red
// Note that the index is the flat index in the tree, so the whole multiblock
// is index 0 and the blocks are flat indexes 1, 2 and 3. This affects
// the block returned by mbds->GetBlock(2).
double color[] = {1, 0, 0};
cdsa->SetBlockColor(3, color);
mapper->SetCompositeDataDisplayAttributes(cdsa.Get());
vtkNew<vtkActor> actor;
actor->SetMapper(mapper.Get());
vtkNew<vtkRenderer> renderer;
vtkNew<vtkRenderWindow> renderWindow;
renderWindow->AddRenderer(renderer.Get());
vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
renderWindowInteractor->SetRenderWindow(renderWindow.Get());
renderer->AddActor(actor.Get());
renderWindow->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(CompositePolyDataMapper)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(CompositePolyDataMapper MACOSX_BUNDLE CompositePolyDataMapper.cxx)
target_link_libraries(CompositePolyDataMapper ${VTK_LIBRARIES})
Download and Build CompositePolyDataMapper
Click here to download CompositePolyDataMapper and its CMakeLists.txt file. Once the tarball CompositePolyDataMapper.tar has been downloaded and extracted,
cd CompositePolyDataMapper/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:
./CompositePolyDataMapper
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.