## Introduction

vtkViewport represents part or all of a RenderWindow. It holds a
colleciton of props that will be rendered into the area it represents.
This class also contains methods to convert between coordinate systems
commonly used in rendering.

## See Also

[vtkActor](./Rendering_Core_Actor.html)
[vtkCoordinate](./Rendering_Core_Coordinate.html)
[vtkProp](./Rendering_Core_Prop.html)
[vtkRenderer](./Rendering_Core_Renderer.html)
[vtkRenderWindow](./Rendering_Core_RenderWindow.html)
[vtkVolume](./Rendering_Core_Volume.html)

### addViewProp(prop)

Add a prop to the list of props. Does nothing if the prop is
already present. Prop is the superclass of all actors, volumes,
2D actors, composite props etc.

### getViewProps() : []

Return any props in this viewport.

### hasViewProp(prop) : Boolean

Query if a prop is in the list of props.

### removeViewProp(prop)

Remove a prop from the list of props. Does nothing if the prop
is not already present.

### removeAllViewProps()

Remove all props from the list of props.

### (add/remove/get)Actor2D(actor2d)

Add/Remove different types of props to the renderer.
These methods are all synonyms to AddViewProp and RemoveViewProp.
They are here for convenience and backwards compatibility.