- o -

• obj : vtkPythonCommand
• Object : vtkSmartPointerBase , vtkWeakPointerBase
• OffScreenRendering : vtkWindow
• Offset : vtkOpenGLContextDevice2D::Private , vtkPlotBar
• Opacity : vtkContextItem , vtkProperty2D
• OpacityFunction : vtkCompositeControlPointsItem , vtkCompositeTransferFunctionItem
• OpaqueFlag : vtkLookupTable
• OpaqueFlagBuildTime : vtkLookupTable
• OpenGL15 : vtkOpenGLContextDevice2D::Private
• OpenGL20 : vtkOpenGLContextDevice2D::Private
• OperationType : vtkImplicitBoolean
• Orientation : vtkPlotBar
• Origin : vtkHyperOctree , vtkPlane , vtkRayCastRayInfo
• ostr : vtkOStreamWrapper
• OStream : vtkFileOutputWindow
• OutEdges : vtkVertexAdjacencyList
• Output : vtkPlotHistogram2D
• OutputPipe : vtkWin32ProcessOutputWindow
• OverrideArray : vtkObjectFactory
• OverrideArrayLength : vtkObjectFactory
• OverrideClassNames : vtkObjectFactory
• OverrideWithName : vtkObjectFactory::OverrideInformation