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Orthogonal and Perspective view modes

3D objects in orthogonal projection sometimes look as if they were 2D. Perspective projection mode makes presentations look more realistic.

It is possible to switch between two modes using VTK viewer toolbar buttons:

perspective1.png

Perspective mode button

perspective2.png

Orthogonal mode button

For example, look at the tube shape in both views.

perspective3.png

Shape in perspective mode

perspective4.png

Shape in orthogonal mode

Further than that, it is possible to exercise full control of the presentation of a 3D scene by modification of camera attributes.

To understand how the scene is built, see this picture.

image36.gif

To change camera attributes, click Change View Parameters button in the VTK viewer toolbar.

perspective5.png

The following dialog will appear:

perspective6.png

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