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GaussianSplat

vtk-examples/Cxx/Filtering/GaussianSplat


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See (Python)

Question

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Code

GaussianSplat.cxx

#include <vtkActor.h>
#include <vtkContourFilter.h>
#include <vtkGaussianSplatter.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSphereSource.h>
#include <vtkXMLPolyDataWriter.h>

int main(int, char*[])
{
  vtkNew<vtkNamedColors> colors;

  // Create points on a sphere
  vtkNew<vtkSphereSource> sphereSource;
  sphereSource->Update();

  vtkNew<vtkPolyData> polydata;
  polydata->SetPoints(sphereSource->GetOutput()->GetPoints());

  vtkNew<vtkGaussianSplatter> splatter;
  splatter->SetInputData(polydata);
  splatter->SetSampleDimensions(50, 50, 50);
  splatter->SetRadius(0.5);
  splatter->ScalarWarpingOff();

  vtkNew<vtkContourFilter> surface;
  surface->SetInputConnection(splatter->GetOutputPort());
  surface->SetValue(0, 0.01);

  // Create a mapper and actor
  vtkNew<vtkPolyDataMapper> mapper;
  mapper->SetInputConnection(surface->GetOutputPort());

  vtkNew<vtkActor> actor;
  actor->SetMapper(mapper);

  // Visualize
  vtkNew<vtkRenderer> renderer;
  vtkNew<vtkRenderWindow> renderWindow;
  renderWindow->AddRenderer(renderer);
  vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
  renderWindowInteractor->SetRenderWindow(renderWindow);

  renderer->AddActor(actor);
  renderer->SetBackground(colors->GetColor3d("SteelBlue").GetData());

  renderWindow->SetWindowName("GaussianSplat");
  renderWindow->Render();
  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(GaussianSplat)

find_package(VTK COMPONENTS 
  vtkCommonColor
  vtkCommonCore
  vtkCommonDataModel
  vtkFiltersCore
  vtkFiltersSources
  vtkIOXML
  vtkImagingHybrid
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping GaussianSplat: ${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(GaussianSplat MACOSX_BUNDLE GaussianSplat.cxx )
  target_link_libraries(GaussianSplat PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(GaussianSplat MACOSX_BUNDLE GaussianSplat.cxx )
  target_link_libraries(GaussianSplat PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS GaussianSplat
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build GaussianSplat

Click here to download GaussianSplat and its CMakeLists.txt file. Once the tarball GaussianSplat.tar has been downloaded and extracted,

cd GaussianSplat/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:

./GaussianSplat

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.