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OpenVRSphere

vtk-examples/Cxx/GeometricObjects/OpenVRSphere

Description

This example demonstrates rendering of Sphere in OpenVR (HTC Head-Mounted Display).

Question

If you have a question about this example, please use the VTK Discourse Forum

Code

OpenVRSphere.cxx

#include <vtkActor.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkOpenVRRenderWindow.h>
#include <vtkOpenVRRenderer.h>
#include <vtkOpenVRRenderWindowInteractor.h>
#include <vtkSphereSource.h>


int main(int, char *[])
{
  // Create a Sphere
  vtkSmartPointer<vtkSphereSource> sphereSource;
  sphereSource->SetCenter(0.0, 0.0, 0.0);
  sphereSource->SetRadius(5.0);

  //Create a Mapper
  vtkSmartPointer<vtkPolyDataMapper> mapper;
  mapper->SetInputConnection(sphereSource->GetOutputPort());

  //Create an Actor
  vtkSmartPointer<vtkNamedColors> colors;
  vtkSmartPointer<vtkActor> actor;
  actor->SetMapper(mapper);

  //Create a Renderer, RenderWindow, RenderWindowInteractor
  vtkSmartPointer<vtkOpenVRRenderer> renderer;
  vtkSmartPointer<vtkOpenVRRenderWindow> renderWindow;
  renderWindow->AddRenderer(renderer);
  renderWindow->SetWindowName("OpenVRSphere");
  vtkSmartPointer<vtkOpenVRRenderWindowInteractor> renderWindowInteractor;
  renderWindowInteractor->SetRenderWindow(renderWindow);

  //Add actor to the scene
  renderer->AddActor(actor);
  renderer->SetBackground(colors->GetColor3d("ForestGreen").GetData());
  renderWindow->Render();
  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.12 FATAL_ERROR)

project(OpenVRSphere)

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

if (NOT VTK_FOUND)
  message("Skipping OpenVRSphere: ${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(OpenVRSphere MACOSX_BUNDLE OpenVRSphere.cxx )
  target_link_libraries(OpenVRSphere PRIVATE ${VTK_LIBRARIES})
else()
  # Prevent a "command line is too long" failure in Windows.
  set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
  add_executable(OpenVRSphere MACOSX_BUNDLE OpenVRSphere.cxx )
  target_link_libraries(OpenVRSphere PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS OpenVRSphere
    MODULES ${VTK_LIBRARIES}
    )
endif()

Download and Build OpenVRSphere

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

cd OpenVRSphere/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:

./OpenVRSphere

WINDOWS USERS

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