Illustrates how to compute the current time and the time since a prior simulation update.
javascript programming
exa_04_time
<html> <head> <title>time</title> <script> var simEndTime = 100.0; // example target end time var lastUpdateWallClock = new Date().getTime(); var minTimeElapsed = Infinity; var maxTimeElapsed = 0.0; var count = 0; function checkTime() { var now = new Date().getTime(); var dt = (now - lastUpdateWallClock)/1000; // seconds if (count%100===0) console.log("count",count,"minTimeElapsed",minTimeElapsed,"maxTimeElapsed",maxTimeElapsed); if (dt < minTimeElapsed) minTimeElapsed = dt; if (dt > maxTimeElapsed) maxTimeElapsed = dt; lastUpdateWallClock = now; count += 1; // Request that the browser call checkTime after a short pause requestAnimationFrame( checkTime ); } </script> </head> <body onload="checkTime();"> <h3>Open the console to see output!</h3> </body> </html>
