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

Sat Sep 9 12:36:57 PDT 2023

inline comments
-----Original Message-----
From: Andreas Plesch <andreasplesch at gmail.com>
Sent: Sep 8, 2023 9:27 PM
To: Brutzman, Donald (Don) (CIV) <brutzman at nps.edu>
Cc: X3D Graphics public mailing list <x3d-public at web3d.org>
Subject: Re: [x3d-public] start timer at fraction 0 after scene loading

> A variation would be for the start timer to self-disable by routing
its cycleTime through event utilities to set its enabled field to
false.

Right, I have done that and it works, If I send a false to loop before fraction 1 best results. Seems like the loop false needs to be sent slightly before sequencer fraction 1 to get the timer to stop at last frame.

What I need is to catch the second StartTimer cycleTime to send to MainTimer startTime. 

For some reason the StartTimer, when halted like that, does not have a useable stopTime. 
In fact, I can't find a usable stop-Time. This should work:

    <TimeSensor DEF='TIME1' cycleInterval='1' loop='true'/>
    <TimeSensor DEF='TIME2' cycleInterval='5' loop='false'/>
    <TimeSensor DEF='TIME3' cycleInterval='10' loop='false'/>:
   <ROUTE fromField='cycleTime' fromNode='TIME1' toField='set_stopTime' toNode='TIME1'/> 
   <ROUTE fromField='stopTime' fromNode='TIME1' toField='set_startTime' toNode='TIME2'/> 
   <ROUTE fromField='stopTime' fromNode='TIME2' toField='set_startTime' toNode='TIME3'/>

Timer1 should start and be stopped a tic or two after its cycleTime is sent. 
Timer 2 gets started by Timer1 cycleTime (couldn't get Timer1 startTime or stopTime to be usable).
TImer2 completes at fraction 1 and sends its stopTime to Timer3 startTime. 
Timer 3 starts, then stops at fraction 1.
Wait, the timer2 stopTime doesn't work like expected, so Timer 3 never Starts.

So, attached is what I have. I don't see why timer3 never gets started.
Thanks,
Joe 

>  is more verbose but may help a bit with performance since
the browser then does not need to check stopTime against the actual
current time at each tick, for a timer which is never used again.

> It would be useful if BooleanFilter would have a triggerFalse field in
addition to its triggerTrue, in order to switch off things. It could
be just added without backward compatibility issues. A BooleanFilter
can invert but it seems arbitrary and unsymmetrical to only have
triggerTrue. I have a sense of Dejavu since event utilities had been
discussed before.

Cheers, Andreas

On Fri, Sep 8, 2023 at 3:18 PM Brutzman, Donald (Don) (CIV)
wrote:
>
> Very interesting, thanks for sharing Andreas. We should all be thinking of regularizing some example design patterns like animation.
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> Meanwhile, your example is the kind that makes me think we should have a description field for ROUTE.
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> Potential alternative approaches for ROUTE comments:
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> 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.
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> Maybe some clumsy-but-unambiguous convention like the following already-legal X3D fragment:
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> Of course simplest future approach would be to give ROUTE a description field. Hmmm, maybe someday.
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> Might deserve a Mantis issue for X3D4.1 if others agree some potential value exists for future consideation.
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> 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 On Behalf Of Andreas Plesch
> Sent: Thursday, September 7, 2023 1:43 PM
> To: X3D Graphics public mailing list
> 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:
>
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> https://andreasplesch.github.io/Library/Viewer/dev.html?url=https://gist.githubusercontent.com/andreasplesch/3f7ea30b9860b6399c797c51e3235459/raw/d17f9d2a0a258569ac5a474c36a68208674d535e/countdown.x3d
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> https://create3000.github.io/x_ite/playground/?url=https://gist.githubusercontent.com/andreasplesch/3f7ea30b9860b6399c797c51e3235459/raw/d17f9d2a0a258569ac5a474c36a68208674d535e/countdown.x3d
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> -Andreas
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>
> On Thu, Sep 7, 2023 at 1:01 AM Andreas Plesch wrote:
>
> >
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> > Another method apart from a ProximitySensor to start a timer without
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> > user interaction after scene loading is to use two TimeSensors. The
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> > first has loop=true and its only purpose is to trigger the second by
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> > routing its cycleTime to the startTime of the second TimeSensor. The
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> > first also stops itself by routing its cycleTime to its own stopTime.
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> > Here is an example modified from the cycleTime NIST example:
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> >
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> > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Frent
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> > ry.co%2Fx3d-startTimer&data=05%7C01%7Cbrutzman%40nps.edu%7C4b415083034
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> > 641d371e608dbafe335ef%7C6d936231a51740ea9199f7578963378e%7C0%7C0%7C638
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> > 297162641403741%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2
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> > luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=v3ah%2F2OY7
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> > NVzEwTUIhRhBjG%2BNHdMZoJTbsC3lEnHR1I%3D&reserved=0
>
> >
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> > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fandr
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> > easplesch.github.io%2FLibrary%2FViewer%2Fdev.html%3Furl%3Dhttps%3A%2F%
>
> > 2Fgist.githubusercontent.com%2Fandreasplesch%2F3f7ea30b9860b6399c797c5
>
> > 1e3235459%2Fraw%2F118d65438f9cfdc152c01fc5a24a8eccec705511%2FstartTime
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> > 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
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> > %2BSchjeWtKfYWNDMHw%3D&reserved=0
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> >
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> > --
>
> > Andreas Plesch
>
> > Waltham, MA 02453
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> --
>
> Andreas Plesch
>
> Waltham, MA 02453
>
>
>
> _______________________________________________
>
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>
> x3d-public at web3d.org
>
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--
Andreas Plesch
Waltham, MA 02453

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