X3D Model Documentation: ECMAScriptSaiPerFrameNotification.x3d

  1  <?xml version="1.0" encoding="UTF-8"?>
  2  <!DOCTYPE X3D PUBLIC "ISO//Web3D//DTD X3D 4.0//EN" "https://www.web3d.org/specifications/x3d-4.0.dtd">
  3  <X3D profile='Immersive' version='4.0'  xmlns:xsd='http://www.w3.org/2001/XMLSchema-instance' xsd:noNamespaceSchemaLocation='https://www.web3d.org/specifications/x3d-4.0.xsd'>
  4       <head>
  5            <meta name='title' content=' ECMAScriptSaiPerFrameNotification.x3d '/>
  6            <meta name='description' content='Java Scene Authoring Interface (JSAI) scene and source code example that show how to use per frame notification to produce a frame rate annotation.'/>
  7            <meta name='creator' content='X3D Working Group'/>
  8            <meta name='created' content='23 February 2005'/>
  9            <meta name='modified' content='28 September 2025'/>
 10            <meta name='reference' content=' https://www.web3d.org/files/specifications/19777-1/V3.3/Part1/X3D_ECMAScript.html '/>
 11            <meta name='specificationSection' content='X3D language bindings, ISO/IEC 19777-1, Part 1: ECMAScript, B.4 Per frame notification'/>
 12            <meta name='specificationUrl' content='https://www.web3d.org/files/specifications/19777-1/V3.3/Part1/examples.html#PerFrameNotification'/>
 13            <meta name='generator' content='X3D-Edit 4.0, https://www.web3d.org/x3d/tools/X3D-Edit'/>
 14            <meta name='identifier' content=' https://www.web3d.org/x3d/content/examples/Basic/X3dSpecifications/ECMAScriptSaiPerFrameNotification.x3d '/>
 15            <meta name='license' content='../license.html'/>
 16       </head>
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 17       <Scene>
 18            <WorldInfo title='ECMAScriptSaiPerFrameNotification.x3d'/>
 19            <Script DEF='SC'>
  <![CDATA[ 
      
ecmascript:
var lastStartTime;

function initialize() {
    date = new Date();
    lastStartTime = date.getTime();
}

// Called each frame
function prepareEvents() {
    date = new Date();
    frameTime = (date.getTime() - lastStartTime) / 1000.0;
    lastStartTime = date.getTime();
    fps = 1.0 / frameTime;
    Browser.println('FPS: ' + fps);
}
]]>
 21            </Script>
 22       </Scene>
 23  </X3D>
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