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Board » Technical Support » New Rounding Rules

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Posted by
AGage


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2008-12-27 10:31:57
2010-03-23 14:08:28 - Re: New Rounding Rules
Can the implementation, or atleast detail, of the new rounding 'rules' be explained?
I am in the Grey WHale Migration race, couldnt login for a few days and had my boat on a TWA course. Rounded 1st WP fine, but passd the 2nd to the west, so i have gone back south to round it properly, but it does not say 'Rounded' but still 'Pass NE'.

I have attatched screenshot to illustrate.

WHat should I have done here? Or is this an issue of implementation and WPs with very little course change (as with this WP)? I know how I (as a programmer) would have implemented the rule enforcement, so perhaps it is and needs some fine tuning as to Vector angles? ALthough you may have a completely different solution for enforcing proper mark rounding...
I help develop the client interface for the best online ocean racing sim there is... __/)/)_/)__
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Posted by
Schakel


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2008-12-19 09:19:00
2010-03-23 14:24:56 - Re: New Rounding Rules
You have to back track and pass the waypoint on the same side again before you can round it on the correct side. In this case, you'd have to pass it to the south west again before passing it to the north east to get it marked as rounded.

HTH,
Philip
Posted by
A2


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2009-10-26 00:39:42
2010-03-23 14:58:37 - Re: New Rounding Rules
It may be helpful to illustrate the new rules for rounding way points in SOL by saying that marks are rounded in either a Clockwise or Counter-clockwise (anti-clockwise for the Brits) fashion.

You are no longer able to simply play "Tag & Go" with the decision point. Proper approach and exit must be adhered to.

I have been told that Sailors don't think in these terms but rather have their own linguistic style for referring to the same actions such as "leave to port / starboard."

Whichever works for you
is fine with me.

As a side note:

If you happen to jump across the tip of land that the mark is placed on and in so doing have passed it the wrong way round, you will have to retrace not only your steps but also that jump as well to get back to the place where you deviated from the allowed path before completing this "Hypothetical" way point.

8^)

--- Last Edited by Aethereal at 2010-03-23 15:03:12 ---
None so blind
Posted by
Incognito


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2008-12-06 13:43:52
2010-03-23 15:03:17 - Re: New Rounding Rules
A picture if often worth a thousand words.
;)
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Posted by
76Trombones


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2009-08-03 18:04:56
2010-03-23 15:59:53 - Re: New Rounding Rules
Examples of valid and invalid roundings for a marks-to-port/anti-clockwise case. (ignore the finish line stuff)



edit: hmmm... forum format doesn't much like largish embedded images :)

edit: still too big...

--- Last Edited by 76Trombones at 2010-03-23 16:08:43 ---
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Posted by
AGage


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2010-03-23 16:50:22 - Re: New Rounding Rules
Thanks, after reading that I am rather ashamed I didnt realize that before...
I should have... been racing boats long enough LOL

Edit Looks fine 76T, although 'G' looks a little odd...

--- Last Edited by Aaron Gage at 2010-03-23 16:52:33 ---
I help develop the client interface for the best online ocean racing sim there is... __/)/)_/)__
Posted by
sol


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2008-08-14 11:08:14
2010-03-24 18:07:49 - Re: New Rounding Rules
Remember that Q about the 180 case? sol is at the top mark in Rio and it looks like the server and client may have a disagreement. I guess it was 50-50? :)

I'm taking her back for a try going against the arrows.

76T

edit: clockwise rounding (against the arrow) works fine.

jakob said @ 2010-03-19 14:10:26:
The system should work with the 180 deg turns. The server then chooses a direction. To be frank we need some final testing of that to see that the client and the server agrees on the rounding direction. :-) Thanks for caring, testing and reporting!!



--- Last Edited by file complaints here at 2010-03-24 19:10:44 ---
Posted by
A2


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2009-10-26 00:39:42
2010-03-24 20:57:58 - Re: New Rounding Rules
I had give some thought as to the logic of how to establish a correct rounding of a given mark.

I do not have any coding skills & I do not know what method is currently employed.

However please consider the following arrangement:

For every waypoint that has a directional vector which must be rounded create a secondary back azimuth vector 180 degrees in the opposite direction which if crossed first, would disable the forward gate until the anti gate was crossed again in the opposite direction. Thus every mark would actually be bidirectional in scope.

This would insure proper confirmation when a way point was rounded as required.

P.S.

Put a count function on the anti gate so that should a boat do a 360 in the wrong direction and pass the anti gate for a 2nd time merely re-crossing it once would not enable the forward gate until the wrong way count equals zero.

--- Last Edited by Aethereal at 2010-03-24 21:05:04 ---
None so blind

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