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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">Mail</a> for Windows 10</p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From: </b><a href="mailto:Leonard.Daly@realism.com">Leonard Daly</a><br><b>Sent: </b>Friday, August 11, 2017 9:03 PM<br><b>To: </b><a href="mailto:x3d-public@web3d.org">X3D Graphics public mailing list</a><br><b>Cc: </b><a href="mailto:andreasplesch@gmail.com">Andreas Plesch</a>; <a href="mailto:yottzumm@gmail.com">John Carlson</a><br><b>Subject: </b>Script Illustrative Example [was: X3D Specification Relationshipsdiagram]</p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='color:#70AD47'>I was asked by John to construct an example illustrating the items listed below. I also have replies to Andreas' comments. The original message is at the bottom (for reference). I've copied the relevant questions/statements to the top to make reading easier.<br><br>First to the example. It is located at <a href="http://tools.realism.com/development/WG-Support/2017-08-09/ScriptIllustration.html"><span style='color:#70AD47'>http://tools.realism.com/development/WG-Support/2017-08-09/ScriptIllustration.html</span></a><br>It does not use Cobweb since I can't begin to figure out how to do this in Cobweb. OTOH, if X3D is DOM integrated, then the it shouldn't matter where various functions and methods are located.<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='color:#70AD47'><o:p> </o:p></span></p><p class=MsoNormal>Let’s see if I can extract the salient points of the link, so we know what to show in Cobweb:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><ol style='margin-top:0in' start=1 type=1><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>getElementById<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>window.requestAnimationFrame/event loop<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>setAttribute of style to set position<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Functions with time and more than 2 parameters<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Use of a field or attribute to set a function, and using window to find the function.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Easy access to a position array.<o:p></o:p></li></ol><p class=MsoListParagraph><br>Is that all the salient points we need to show in Cobweb? I will likely implement the whole thing anyway, and I have the feeling that it can be done, perhaps with or without the window object.<br><br><br><o:p></o:p></p><p class=MsoNormal><span style='color:#70AD47'><br>It seems to me that eval the script text each time, especially in an animation loop, is needlessly expensive. <o:p></o:p></span></p><p class=MsoNormal><span style='color:#70AD47'><o:p> </o:p></span></p><p class=MsoNormal>What I currently eval each loop in X3DJSONLD are the events that need to fire for the Script to interact with ROUTEs, and probably a subset of those (TimeSensor comes to mind). The rest of the script can be eval’ed once. I have 3 evals, one for the script and setup, one for initializeOnly routes, and one for the main event loop. The loop itself is not eval’ed and kept external. Conceivably, I could put the loop in the eval block and have it only eval once (but then it would be hard to set and clear breakpoints possibly). Each time a new X3D JSON file is loaded, the contents of the eval’s may be wiped out (they are no longer referenced, but may stick around in memory, I am not sure). In any case, putting the event loop in the eval is a performance enhancement, and I’m not into performance at this point, debugging is more important. I am sorry if you are criticizing my implementation, but no harm taken (thanks for the advice in fact). A simple fix is all that is required, and has been done before.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I actually eval everything twice in X3DJSONLD, I believe, once per X3DOM canvas.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>John</p><p class=MsoNormal><span style='color:#70AD47'><br><br></span><o:p></o:p></p><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p></div></body></html>