[x3d-public] start timer at fraction 0 after scene loading

Fri Sep 8 12:18:35 PDT 2023

Very interesting, thanks for sharing Andreas.  We should all be thinking of regularizing some example design patterns like animation.

Meanwhile, your example is the kind that makes me think we should have a description field for ROUTE.

    <ROUTE fromField='cycleTime' fromNode='TIME1' toField='stopTime' toNode='TIME1'/>

    <ROUTE fromField='cycleTime' fromNode='TIME1' toField='startTime' toNode='TIME2'/>

Potential alternative approaches for ROUTE comments: 

*	Comments?  Sure, but sometimes get stripped, and not unambiguously readable by tools.
*	Prototype extension?  Too complex and error prone, fuggedaboutit.
*	Metadata nodes?  Hmm, we can't make those part of ROUTE statements themselves, not allowed.

Maybe some clumsy-but-unambiguous convention like the following already-legal X3D fragment:

<MetadataSet name=”RouteDescriptions” reference=”someWeb3dRecommendedPracticeURL”>

   <MetadataString name=”ROUTE” value=”TIME1.cycleTime TO Time2.startTime”/>

   <MetadataString name=”ROUTE” value=”TIME1.cycleTime TO Time1.stopTime”/>

   <MetadataString name=”description” value=”trigger the other ROUTE, then turn itself off”/>

</MetadataSet>

Of course simplest future approach would be to give ROUTE a description field.  Hmmm, maybe someday.

Might deserve a Mantis issue for X3D4.1 if others agree some potential value exists for future consideation.

all the best, Don

-- 

Don Brutzman  Naval Postgraduate School, Code USW/Br        brutzman at nps.edu

Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA    +1.831.656.2149

X3D graphics, virtual worlds, navy robotics https://faculty.nps.edu/brutzman

-----Original Message-----
From: x3d-public <x3d-public-bounces at web3d.org> On Behalf Of Andreas Plesch
Sent: Thursday, September 7, 2023 1:43 PM
To: X3D Graphics public mailing list <x3d-public at web3d.org>
Subject: Re: [x3d-public] start timer at fraction 0 after scene loading

Here is an initial count down after loading the scene using the same autostart method, and a sequencer:

https://andreasplesch.github.io/Library/Viewer/dev.html?url=https://gist.githubusercontent.com/andreasplesch/3f7ea30b9860b6399c797c51e3235459/raw/d17f9d2a0a258569ac5a474c36a68208674d535e/countdown.x3d

https://create3000.github.io/x_ite/playground/?url=https://gist.githubusercontent.com/andreasplesch/3f7ea30b9860b6399c797c51e3235459/raw/d17f9d2a0a258569ac5a474c36a68208674d535e/countdown.x3d

-Andreas

On Thu, Sep 7, 2023 at 1:01 AM Andreas Plesch < <mailto:andreasplesch at gmail.com> andreasplesch at gmail.com> wrote:

> 

> Another method apart from a ProximitySensor to start a timer without 

> user interaction after scene loading is to use two TimeSensors. The 

> first has loop=true and its only purpose is to trigger the second by 

> routing its cycleTime to the startTime of the second TimeSensor. The 

> first also stops itself by routing its cycleTime to its own stopTime.

> 

> Here is an example modified from the cycleTime NIST example:

> 

>  <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Frent> https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Frent

> ry.co%2Fx3d-startTimer&data=05%7C01%7Cbrutzman%40nps.edu%7C4b415083034

> 641d371e608dbafe335ef%7C6d936231a51740ea9199f7578963378e%7C0%7C0%7C638

> 297162641403741%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2

> luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=v3ah%2F2OY7

> NVzEwTUIhRhBjG%2BNHdMZoJTbsC3lEnHR1I%3D&reserved=0

> 

>  <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fandr> https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fandr

> easplesch.github.io%2FLibrary%2FViewer%2Fdev.html%3Furl%3Dhttps%3A%2F%

> 2Fgist.githubusercontent.com%2Fandreasplesch%2F3f7ea30b9860b6399c797c5

> 1e3235459%2Fraw%2F118d65438f9cfdc152c01fc5a24a8eccec705511%2FstartTime

> r.x3d&data=05%7C01%7Cbrutzman%40nps.edu%7C4b415083034641d371e608dbafe3

> 35ef%7C6d936231a51740ea9199f7578963378e%7C0%7C0%7C638297162641403741%7

> CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1

> haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=m8xOnL%2BHHQy5gXlqLQaec6vBIi

> %2BSchjeWtKfYWNDMHw%3D&reserved=0

> 

> --

> Andreas Plesch

> Waltham, MA 02453

--

Andreas Plesch

Waltham, MA 02453

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