Navigation, Input Devices, and Collision - Interactive Web-Based Virtual Reality with Java 3D - page 225

Figure 7. Fourth code segment for KeyBoardNavigation.java

97. public void processStimulus(Enumeration criteria)

98. {

99. WakeupCriterion wakeup; AWTEvent[] event ;

100. while(criteria.hasMoreElements())

101. {

102. wakeup = (WakeupCriterion) criteria.nextElement();

103. if(wakeup instanceof WakeupOnAWTEvent)

104. {

105. event = ((WakeupOnAWTEvent)wakeup).getAWTEvent();

106. keyPressed((KeyEvent)event[0]);

107. }

108. }

109. this.wakeupOn(allEvents);

110. }

111.
112. } // end of class KeyBoardBehavior

Figure 8. Mouse interaction utility class

MouseRotate()
// constructor for a default mouse rotate behavior.

MouseRotate(int flags)
// create a rotate behavior with flags. Flags may be MouseBehavior.INVERT_INPUT or
// MouseBehavior.MANUAL_WAKEUP for inverting input or manual wakeup, respectively.

MouseRotate(TransformGroup transformGroup)
// create a rotate behavior given the transform group.

MouseTranslate()
MouseTranslate(int flags)
MouseTranslate(TransformGroup transformGroup)
// equivalent constructors for translation instead of rotation

MouseZoom()
MouseZoom(int flags)
MouseZoom(TransformGroup transformGroup)
// equivalent constructors for zooming instead of rotation

MouseBehavior Class Response to Mouse Action Mouse Action

Left-button held with mouse
movement

MouseRotate Rotate object

Translate object in a plane parallel to
image plate

Right-button held with mouse
movement

MouseTranslate

Translate the object in a plane
orthogonal to the image plate

Middle-button held with mouse
movement

MouseZoom