Event-utility nodes allow conversion and connection of different data types via ROUTEs, while Script nodes allow authors to write their own event-handling code for special scene capabilities.

Event utility nodes simplify data-type conversion of events when producing animation chains between nodes. These include BooleanFilter, BooleanSequencer, BooleanToggle, IntegerSequencer, IntegerTrigger, and TimeTrigger nodes.

The Script node allows authors to define new functionality produced by JavaScript (ECMAscript) or Java code. Authors can add field declarations that define accessType (inputOnly, outputOnly, initializeOnly and inputOutput) and type for each field.

The supporting Chapter 9 slideset and course videos (NPS, YouTube) for X3D for Web Authors are available online via X3dGraphics.com.

Also available: X3D Scene Authoring Hints for Scripts and URL Links.

Authors can use a 10-step algorithm checklist (with example diagram) as an event-animation design pattern that helps build consistent event-routing chains. The supporting Chapter 7 slideset and course videos (NPS, YouTube) for X3D for Web Authors are available online via X3dGraphics.com.

The quick-reference sheet X3D Event Utility Nodes: Field Event Diagrams illustrates the functionality of the event utility nodes. These nodes receive and pass values that are sent via ROUTE connections.