VTK::RenderingANARIOpenGL

Introduction

VTK::RenderingANARIOpenGL is a module that can be used to display the ANARI rendered frame in a render window. This module implements a render pass that can be used for onscreen rendering.

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Using ANARI onscreen

The following code snippet is the intended way to show the ANARI rendered frame to an OpenGL render window:

// Setup an actor
vtkNew<vtkSphereSource> source;
vtkNew<vtkPolyDataMapper> mapper;
mapper->SetInputConnection(source->GetOutputPort());
vtkNew<vtkActor> actor;
actor->SetMapper(mapper);

vtkNew<vtkRenderWindowInteractor> interactor;
vtkNew<vtkRenderWindow> renderWindow;
interactor->SetRenderWindow(renderWindow);
vtkNew<vtkRenderer> renderer;
renderer->AddActor(actor);
renderWindow->AddRenderer(renderer);

// Initialize ANARI pass
vtkNew<vtkAnariPass> anariPass;
anariPass->GetAnariDevice()->SetupAnariDeviceFromLibrary("environment", "default", false);
renderer->SetPass(anariPass);

// Start scene rendering / interaction
interactor->Start();

Factory preferences

When both ANARI and OpenGL are activated on a VTK build, the factory may not pick the right class for vtkRenderWindow. In this case, the override attribute SupportRenderPass=true helps the factory to select the vtkOpenGLRenderWindow. See Override Attributes for more information about this topic.