Add OpenXR cone example

src/Cxx.md

@@ -182,6 +182,7 @@ If you are new to VTK then these [tutorials](#tutorial) will help to get you sta
 [OpenVROrientedCylinder](/Cxx/GeometricObjects/OpenVROrientedCylinder) | Show an oriented cylinder in VR using OpenVR.
 [OpenVRSphere](/Cxx/GeometricObjects/OpenVRSphere) | Show a sphere in VR using OpenVR.
 [OpenVRTessellatedBoxSource](/Cxx/GeometricObjects/OpenVRTessellatedBoxSource) | Show a tesselated box in VR using OpenVR.
+[OpenXRCone](/Cxx/GeometricObjects/OpenXRCone) | Show a cone in VR using OpenXR.
 [PlaneSourceDemo](/Cxx/GeometricObjects/PlaneSourceDemo) | Display the instance variables that define a vtkPlaneSource.
 [Planes](/Cxx/GeometricObjects/Planes) |
 [PlanesIntersection](/Cxx/GeometricObjects/PlanesIntersection) |

src/Cxx/GeometricObjects/CMakeLists.txt

@@ -50,6 +50,7 @@ Requires_Module(OpenVROrientedArrow RenderingOpenVR)
 Requires_Module(OpenVROrientedCylinder RenderingOpenVR)
 Requires_Module(OpenVRSphere RenderingOpenVR)
 Requires_Module(OpenVRTessellatedBoxSource RenderingOpenVR)
+Requires_Module(OpenXRCone RenderingOpenXR)
 Requires_Module(ParametricObjectsDemo cli11)
 Requires_Module(ParametricObjectsDemo fmt)
 

src/Cxx/GeometricObjects/OpenXRCone.cxx

+#include <vtkActor.h>
+#include <vtkConeSource.h>
+#include <vtkNamedColors.h>
+#include <vtkNew.h>
+#include <vtkOpenXRRenderWindow.h>
+#include <vtkOpenXRRenderWindowInteractor.h>
+#include <vtkOpenXRRenderer.h>
+#include <vtkPolyDataMapper.h>
+
+int main(int argc, char* argv[])
+{
+  // Create a cone along with a mapper and actor for it
+  vtkNew<vtkConeSource> coneSource;
+  coneSource->Update();
+  vtkNew<vtkNamedColors> colors;
+  vtkNew<vtkPolyDataMapper> mapper;
+  mapper->SetInputConnection(coneSource->GetOutputPort());
+  vtkNew<vtkActor> actor;
+  actor->SetMapper(mapper);
+
+  // Create OpenXR renderer, render window, and interactor
+  vtkNew<vtkOpenXRRenderer> renderer;
+  vtkNew<vtkOpenXRRenderWindow> renderWindow;
+  renderWindow->Initialize();
+  renderWindow->AddRenderer(renderer);
+  vtkNew<vtkOpenXRRenderWindowInteractor> renderWindowInteractor;
+  renderWindowInteractor->SetRenderWindow(renderWindow);
+
+  // Add the actors to the scene
+  renderer->AddActor(actor);
+  renderer->SetBackground(colors->GetColor3d("ForestGreen").GetData());
+
+  // Render and interact
+  renderWindow->Render();
+  renderWindowInteractor->Start();
+
+  return EXIT_SUCCESS;
+}

src/Cxx/GeometricObjects/OpenXRCone.md

+### Description
+
+This example demonstrates rendering of a Cone in OpenXR.
+
+!!! note "WINDOWS USERS"
+    For the interactions to work, you have to copy the `.json` manifest files from the subfolder Rendering/OpenXR in VTK's source to the working directory in which the example is run!