StageTools - Documentation (StageManager/Samples/parent)

Frames of Reference:

This example shows the difference between these two methods. First a compound object is created called cube that is made up of a cube together with some axes. These axes mark the coordinate system of the cube. A second set of axes are loaded; these mark the coordinate system of the parent, which is the world object in Geomview.

An initial configuration is set up using Transform that has the cube offset from the center of the world.

Note the difference between rotating the cube in its own coordinate system and rotating it in the world coordinate system in the first two Sequence commands. The next two sequences show that you frequently can get the same effects by changing the centers of the transformations, done here by adding a second parameter to the XY command.

The cube and xyz.vect files are standard ones that come with Geomview.

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parent.sm

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   Geometry build cube {{< cube} {< xyz.vect}}
   Load xyz.vect

   Transform {Scale .75}
   Transform {Product {YZ -$pi/3} {XY -$pi/6}}

   Transform {Translate {0 1 0}} cube

   Pause 3
   Sequence {XY $pi/2} 8 cube
   Pause 3
   Sequence {XY $pi/2} 8 cube -parent
   Pause 3
   Sequence {XY $pi/2 {-1 0 0}} 8 cube
   Pause 3
   Sequence {XY $pi/2 {0 -1 0}} 8 cube -parent
   Pause 5

	Rotating a Torus
	Sample StageManager Files
	Rotating Cube

StageTools Documentation (StageManager/Samples/parent) Created: 03 Jun 1996 --- Last modified: Nov 23, 1999 4:08:34 PM Comments to: dpvc@union.edu