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<p>If we take WebVR into consideration, these types of delays are
significant.</p>
<p>Do you anticipate problems? End to end system delay in VR
systems must be 20 milliseconds or less to avoid simulator
sickness.<br>
</p>
<br>
<div class="moz-cite-prefix">On 10/30/16 7:59 AM, Andreas Plesch
wrote:<br>
</div>
<blockquote
cite="mid:CAKdk67uRXscb13gBgs498HMVUUFALTZG8EdENeGTnk8pV0989g@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>
<div>
<div>
<div>Hello,<br>
<br>
</div>
cobweb_dom v0.7 is now available. It has full support for
ProtoInstance nodes and basic event tracing capability.<br>
<br>
</div>
v0.7 requires the latest development cobweb.js, eg cobweb
> 2.3 .<br>
<br>
</div>
Event tracing to the console can be enabled by providing a
'trace' attribute to the X3DCanvas element (with any value).<br>
<br>
</div>
All output x3d events are logged. Here is an example:<br>
<div>
<div>
<div>
<div>
<div><br>
<div>
<div>1477837418917000: Background x3d_isBound: true<br>
1477837418918000: Background x3d_bindTime:
1477837418.9007943<br>
1477837418919000: Viewpoint x3d_isBound: true<br>
1477837418920000: Viewpoint x3d_bindTime:
1477837418.9007943<br>
1477837421509000: CylinderSensor aroundX
x3d_isOver: true<br>
...<br>
<br>
</div>
<div>(using <a moz-do-not-send="true"
href="https://andreasplesch.github.io/cobweb_dom//tests/interactiveTransformations.xhtml">https://andreasplesch.github.io/cobweb_dom//tests/interactiveTransformations.xhtml</a>
)<br>
</div>
<div><br>
The frontal time stamp is the DOM event creation
time stamp in microseconds produced by the web
browser and available to DOM event listeners.<br>
</div>
<div>It is interesting to see the difference between
the time stamp and say the bindTime of the
Background node, 18.918s - 18.901s = 17 ms<br>
</div>
<div>or for Viewpoint: 18.920 - 18.901 = 19 ms.<br>
</div>
<div>So it takes a bit for cobweb to call the event
callback which creates the DOM event.<br>
</div>
<div>When a DOM event listener captures the event,
it may be a little later again.<br>
With a fps of 30, a frame lasts 33ms.<br>
</div>
<div>It will be interesting to compare what time
stamps and values are reported with the x3d-edit
trace scripts.<br>
</div>
<div><br>
</div>
<div>-Andreas<br>
</div>
<div><br>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, Oct 29, 2016 at 8:00 PM,
Andreas Plesch <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:andreasplesch@gmail.com" target="_blank">andreasplesch@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<p dir="ltr">On Oct 29, 2016 6:20 PM, "Don Brutzman" <<a
moz-do-not-send="true" href="mailto:brutzman@nps.edu"
target="_blank">brutzman@nps.edu</a>> wrote:<br>
><br>
> On 10/29/2016 2:21 PM, Andreas Plesch wrote:<br>
>><br>
>> [...]<br>
>><br>
>> Since logging all fields for all nodes becomes
quickly a bit overwhelming, it would be a nice touch to be
able select in the GUI which fields are traced (by default
all).<br>
><br>
><br>
> excellent idea. not easily accomplished with current
setup, but will keep it in mind as a future feature in
X3D-Edit.<br>
><br>
> for that matter, couldn't someone someday somewhere
create such a widget in HTML that listened to all ROUTEs,
as selected? 8)</p>
<p dir="ltr">It should be possible find all elements
referenced by fromNode attributes in ROUTE elements and
attach event listeners with handlers which just log to the
console. Let me give it a try.</p>
<span class="HOEnZb"><font color="#888888">
<p dir="ltr">Andreas </p>
</font></span></blockquote>
</div>
<br>
<br clear="all">
<br>
-- <br>
<div class="gmail_signature" data-smartmail="gmail_signature">Andreas
Plesch<br>
39 Barbara Rd.<br>
Waltham, MA 02453</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
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</blockquote>
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