vtkActor

A vtkActor is a fundamental component in the Visualization Toolkit (VTK) used for 3D rendering. Think of it as an object that represents a visual element—like a shape, model, or scene—that can be displayed within a 3D environment. It holds information about the geometry (the form of the object), its appearance (color, texture, transparency), and how it interacts with lights and cameras. Essentially, vtkActor acts as an interface between the raw data defining a shape and how that shape appears and is presented visually in a 3D scene.