VRML Script Tutorial Full list VRML Interactive Tutorial Introduction VRML File Structure Drawing: Shape node Geometry Nodes: Box Sphere Cone Cylinder PointSet IndexedLineSet IndexedFaceSet Extrusion ElevationGrid Example: Chessboard Text FontStyle Appearance Material Textures Image Texture Movie Texture Pixel Texture Texture Coordinate Texture Transform Let there be Light Directional Light Point Light Spot Light Materials with Colored Lights Hierarchical Node Structures Group Transform Collision Anchor Billboard Switch Inlining Files Defining and Instancing Nodes Defining Levels of Detail Events in VRML Creating Paths between events: ROUTE Generating Events based on Timers or User Actions Timers Touch Sensor Visibility Sensor Dragging Sensors Plane Sensor Sphere Sensor Cylinder Sensor Proximity Sensors Example: Proximity sensor Interpolators Color Coordinate Normal Orientation Position Scalar Example Let the Music Play Sound AudioClip Bindable Nodes Who Am I: NavigationInfo Where Am I: ViewPoint Adding Realism to the world Background Fog Information about your world WorldInfo Definition for Auxiliary Nodes Coordinate Color Normal				VisibilitySensor Node The VisibilitySensor node is used to detect visibility changes in a virtual box, generating events when the visibility status changes. This sensor does not relate to the shapes defined within the same group, i.e. it does not detect if a shape within a group is visible or not. The Visibility sensor does not detect if the box is hidden from view due to other shapes in the scene. The sensor behaves as if there were no other shapes being drawn. The following fields are present: center: The center of the rectangular box size: The dimensions of the rectangular box enabled: determines the status of the sensor. The following events are generated by this sensor: enterTime: outputs the time when the box becomes visible exitTime: outputs the time when the box stops being visible isActive: outputs TRUE when the box becomes visible, and FALSE when the box becomes invisible Syntax: VisibilitySensor { enabled TRUE center 0 0 0 size 0 0 0 } When defining several VisibilitySensor inside nested groups, all the sensors will generate events when the respective boxes are visible. Example of a VisibilitySensor to play a sound. When the Shape becomes visible you should hear a sound. The following source code describes a group with a Visibility Sensor, a Shape and a Sound. Example: #VRML V2.0 utf8 Group { children [ DEF vs VisibilitySensor { size 1 1 1} Sound { source DEF ac AudioClip { loop FALSE url "sfx.mid" } } Shape { geometry Box { size 1 1 1 } ] } ROUTE vs.enterTime TO ac.set_startTime