Package Vrml2Sourcebook.Chapter27SensingVisibilityProximityCollision

package Vrml2Sourcebook.Chapter27SensingVisibilityProximityCollision

Sensing viewer activity enables the scene to trigger animations.

A VisibilitySensor node checks if a region is visible to the viewer, where the region is described by a center and a size. Time events are sent on entry and exit of visibility, and true/false is sent on entry and exit of visibility. A ProximitySensor node similarly checks if the viewer is within a region, also sending viewer position and orientation while within the sensed region. Collision is a grouping node that checks if the viewer has run into a shape defined by the node's children (or else simpler proxy geometry) with a collision time event sent upon contact.

These X3D scenes are adapted directly from the original VRML 2.0 Sourcebook chapter examples. Also available: Introduction to VRML97 SIGGRAPH98 course notes.

This X3D VRML2 Sourcebook Chapter 27 Sensing Visibility Proximity Collision examples archive is online.

The X3D Java Scene Access Interface (x3djsail) package provides concrete classes for each X3D node and statement.

Online: X3D Java Scene Access Interface Library (X3DJSAIL) and X3DJSAIL Javadoc

See Also:

• X3D VRML 2 Sourcebook Examples Archive
• X3D Resources
• X3D Scene Authoring Hints
• X3D Tooltips
• Package
• https://stackoverflow.com/questions/22095487/why-is-package-info-java-useful
• https://stackoverflow.com/questions/624422/how-do-i-document-packages-in-java

Classes

Class	Description
Figure27_1VisibilitySensorDungeonSlidingDoors	A dungeon door that slides open when visible, and slides closed when not visible.
Figure27_2ProximitySensorDungeonSlidingDoors	A dungeon door that slides open when the ProximitySensor detects the viewer close enough.
Figure27_3CollisionDetectionSpinningOrb	An orb that animates (for a single revolution) when the viewer collides with its box proxy shape.