Myst Online: URU Live Forums :: View topic - Negilahn Portal-Calculator

juri1at

Joined: 11 Nov 2006

Posts: 113

Location: Vienna/Austria

Well, after some missing of the correct portal-time (timezone calculation errors Sad

), I wrote a portal-calculator for easy convert the caverntime/KI-time and locale time of the precalculated times of the portalevents.

It is a simple html-page within javascript and I hope there are no problems with any browser.

Here the link:
simply click onto the image:

If you have any suggestions or bugreports, then feel free to reply or pm me.

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[juri1at] [KI#: 00106277] [Portal-Calculator]

Last edited by juri1at on Tue Mar 13, 2007 2:34 pm; edited 4 times in total

nebodin

Joined: 24 May 2006

Posts: 348

Location: New Zealand

That is an excellent page juri1at, but you seem to have a different understanding of when portals appear than what I thought had been discovered.

We are all happy that the portals appear at midday in Negilahn, but according to your page they also appear at midnight. Is this the case? Have you seen one at midnight? Has anyone seen one at midnight?

Also you seem to be saying that on every 5th half-day cycle there is "no event". Do you mean there is no portal? How did you determine this?

Edit: Another point... I don't think that you are using the correct time zone for determining Ki Time. Apparently Ki Time is the same as the New Mexico's version of MST that includes DST (Daylight Saving Time). So your times after Sun 11 March 02:00 are early by 1 hour, as thats when Daylight Saving starts. You can also use Denver, Colorado as it is equivalent.

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Great Zero Runners Bevin

juri1at

Joined: 11 Nov 2006

Posts: 113

Location: Vienna/Austria

Well, sorry, that was a wrong interpretation from mine.
After reading page after page of the mainthread of Negilahn, I have losen the knowledg about the event times of the last 4 days Sad

After missing a portalevent at 03/05/07 02:50 CT I tried to think as an D'ni. I rememberd the numberingsystem in 5*5 numbers and ...
Well now, there was no portal-event at 03/05/07 18:33 CT!
OK, forget the 5!

Thanks for clarification the point that the portal appears only at midday.

But that's the idea behind my page:
1) the page is easy to modify.
2) the page is valid for newcomers also in the next months (after some less modification)
3) perhaps we need this page for the other pod-ages Wink

Last edited by juri1at on Tue Mar 06, 2007 2:34 am; edited 1 time in total

Tiran

Joined: 09 May 2006

Posts: 3120

Location: Aachen, Germany

juri1at wrote:

2) the page is guilty for newcomers also in the next months (after some less modification)

It's valid not guilty :p

Oder ist die Seite schuldig für Neulinge? *G*

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juri1at

Joined: 11 Nov 2006

Posts: 113

Location: Vienna/Austria

@Tiran: Danke! Ist leider nicht meine Muttersprache Sad

but I do my best Wink

@nebodyn
Well, the daylight saving is a problem, because javascript has no functionality for this.
But, I hope that the function I use (Date.getTimezoneOffset()) returns the correct value after daylight saving.

Tiran

Joined: 09 May 2006

Posts: 3120

Location: Aachen, Germany

Recently I made a lot of experience with datetime programming. I recommend using UTC for all calculations. It makes your live a lot easier.

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Calam

Joined: 11 May 2006

Posts: 1805

Location: Right behind you.

I'm still failing to see the criteria for how the portals are calculated... I thought they appeared every 15 hours and 31 mins?

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juri1at

Joined: 11 Nov 2006

Posts: 113

Location: Vienna/Austria

@Tiran:

The problem isn't the calculation in UTC!

The problems are the people, who don't think in UTC!

nebodin

Joined: 24 May 2006

Posts: 348

Location: New Zealand

Im not sure how programming in UTC is going to help deal with the DST issue.

The cycle is about 15 hours and 43 minutes... or possibly 42 minutes. Its not very clear yet as there is a window of times in which the portal appears at different instances of Negilahn.

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Grieyls

Joined: 16 Feb 2007

Posts: 119

Location: Brisbane, Queensland, Australia

Somebody mentioned that Cavern Time would alter due to Daylight saving why? I know it matches a time zone on earth proper at the moment and all but just because MST also includes daylight saving due the earths axis does not mean that D'ni time has to follow. After all the day night cycle in the cavern is constant no matter what time of year it is. So it would make no sense that it changes and since a KI is a D'ni invention to begin with well...

C'ristan

Joined: 03 Aug 2006

Posts: 97

Location: U.K.

My understanding is that Cavern Time matches standard MST and no DST is applied to it, at any time. Please someone correct me if I'm wrong!

Therefore it is always GMT -7 and UTC -7 since GMT does not technically change throughout the year either. Therefore Cavern Time does not itself change, but when DST comes into effect, your own time changes relative *to it*.

So, in the summer:

from the point of view of someone who is ahead of Cavern Time, Cavern Time will be an hour further behind your local time when a local DST ajustment of +1 is applied.

and

from the point of view of someone who is behind Cavern Time, Cavern Time will be 1 hour closer.

Therefore, to my understanding (assuming DST of +1 hour is applied only):

For someone living within the MST time zone, Cavern Time will be local time -1 hour during the summer, and for someone living in the PST time zone, Cavern Time will match their local time during the summer.

nebodin

Joined: 24 May 2006

Posts: 348

Location: New Zealand

This was over in the Time Confusion topic

Tiran wrote:

Cavern time is another name for the time zone in Eddy County / New Mexico. It's MST and MST has DST. I've already asked the support and they explained that Cavern time will go with DST next sunday.

D'ni time has no DST but D'ni time is totally independent from Cavern Time. The clock in Bevin shows the Pahrtahvotee of D'ni time.

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C'ristan

Joined: 03 Aug 2006

Posts: 97

Location: U.K.

in which case I stand to be corrected ... shame on me for not re-checking other threads ... Wink

'IC' it does seem odd, though, and in practical terms too ... especially as different parts of the world go to DST at different times, none more so than this year.

nebodin

Joined: 24 May 2006

Posts: 348

Location: New Zealand

Well, considering Ki time clearly has nothing to do with D'ni time and that it uses Earth's time, it makes perfect sense for it to just be local time in New Mexico since that is where the cavern is... and local time in New Mexico has DST.

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C'ristan

Joined: 03 Aug 2006

Posts: 97

Location: U.K.

Yeah I guess so ... it just seems odd to me as the KI is D'ni tech, originally linked to the GZ, both for co-ordinates and timekeeping.

But you're right, having been recalibrated by the DRC, why shouldn't they use it to match local surface time?

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