Basic HTML version of Foils prepared March 4 1998

Foil 181 Viewpoint Node - II

From VRML 2 Basic Concepts and Definitions CPS616 -- Information Track of CPS -- Spring Semester 98. by Zeynep Ozdemir, Rob Baker, Meryem Ispirli, Geoffrey C. Fox
Definition and 2 Examples of Viewpoint Nodes for Foil 181(Definition and Examples)
1 description field specifies a text string used to describe the viewpoint.
2 Viewpoints are kept in a stack and the top of the stack is current viewpoint.
  • Background, Fog, NavigationInfo also are done in this stack fashion
3 When a jump (is TRUE) viewpoint is placed on top of the viewpoint stack, the viewer automatically jumps to that Viewpoint node's position, orientation, and field of view.
4 When a no-jump viewpoint is placed on top of the viewpoint stack, by selecting it from a browser's menu for example, the user retains his or her current view.
5 In any case, the viewer's movements are now relative to the new current viewpoint node and to the coordinate system in which that viewpoint is built.
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