X3D Model Documentation: PerFrameNotificationECMAScript.x3d

  1  <?xml version="1.0" encoding="UTF-8"?>
  2  <!DOCTYPE X3D PUBLIC "ISO//Web3D//DTD X3D 3.1//EN" "https://www.web3d.org/specifications/x3d-3.1.dtd">
  3  <X3D profile='Immersive' version='3.1'  xmlns:xsd='http://www.w3.org/2001/XMLSchema-instance' xsd:noNamespaceSchemaLocation='https://www.web3d.org/specifications/x3d-3.1.xsd'>
  4       <head>
  5            <meta name='title' content='PerFrameNotificationECMAScript.x3d'/>
  6            <meta name='description' content='This example shows how to use per-frame notification to produce a frame rate output in the Browser console'/>
  7            <meta name='creator' content='X3D Specification'/>
  8            <meta name='translator' content='Xeena VRML importer'/>
  9            <meta name='translated' content='23 February 2005'/>
 10            <meta name='modified' content='20 October 2019'/>
 11            <meta name='subject' content='X3D ECMAScript Script Authoring Interface (SAI)'/>
 12            <meta name='identifier' content='https://www.web3d.org/x3d/content/examples/Basic/ScriptConformance/PerFrameNotificationECMAScript.x3d'/>
 13            <meta name='reference' content='https://www.web3d.org/x3d/specifications/ISO-IEC-19777-1-X3DLanguageBindings-ECMAScript/Part1/examples.html#PerFrameNotification'/>
 14            <meta name='generator' content='Vrml97ToX3dNist, http://ovrt.nist.gov/v2_x3d.html'/>
 15            <meta name='generator' content='X3D-Edit 3.3, https://savage.nps.edu/X3D-Edit'/>
 16            <meta name='license' content='../license.html'/>
 17       </head>
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 18       <Scene>
 19            <WorldInfo title='PerFrameNotificationECMAScript.x3d'/>
 20            <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);
}
]]>
 22            </Script>
 23       </Scene>
 24  </X3D>
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