Zooming, Rotation, and Panning
Model Viewer displays an object as viewed from a particular viewpoint.
Zooming, rotation, and panning are different ways
to interact with the object by changing the viewpoint.
- Zooming in moves the viewpoint closer to the object being viewed,
causing the object to appear bigger.
- Zooming out moves the viewpoint away from the object being viewed,
causing the object to appear smaller.
- Rotation moves the viewpoint in an angular direction so that the
viewed object appears to rotate.
- Panning moves the viewpoint laterally so that the viewed object
appears to move sideways.
Zooming, rotation, and panning are performed by mouse buttons. Two types of mouse interactions are provided:
Trackball-mode interaction is the default. However, the user may
change the interaction mode from one to the other.