Facebook

Login

Support Sailonline

If you haven't already - join the SAILONLINE YACHT CLUB!

Please also consider making a donation - all amounts are greatly appreciated!

Board » Technical Support » qtVlm thread

Page: First Previous 27 28 29 30 31 32 33 Next

Posted by
maitai


Users avatar

Posts
114
Registered at
2016-02-25 08:15:33
2020-04-15 19:45:45 - Re: qtVlm thread
Hi there,
There is an option for that in general config, routes tab (Beep when routing/simp/etc)
Posted by
Satori


Users avatar

Posts
13
Registered at
2020-06-16 21:08:44
2020-08-28 15:56:17 - Re: qtVlm thread
Satori is a relative newcomer to SOL and I am documenting what I am learning from generous SOLers. Attached are my introductory instruction notes with screen prints in PDF format for “Editing Route With New Weather Report and Uploading Resulting New Delayed Commands to SOL”.

Attachments
Posted by
VIbex


Users avatar

Posts
24
Registered at
2020-06-01 23:54:58
2020-08-29 19:17:03 - Re: qtVlm thread
Hi, Satori, looks interesting. Perhaps simplify the list of DCs by removing unnecessary duplicates? There must be a tool to do that. Also, constantly changing cc's when a single twa will do the trick will be slower, since you take a performance hit every time you change direction. And vice versa, if qtVlm is giving you a straight line and you change twa's to match, it'll be slower. You need to smartly switch between cc's and twa's as the situation dictates. It's the same IRL -- sometimes you go to a waypoint, other times you sail by-the-lee.

Also, on your qtVlm screens, it looks like you're updating a route generated from a previous routing. But with a new weather grid, you may need to rethink your strategy and follow a whole new path. Re-optimizing an old routing is not going to get you what you want, I don't think -- you should start from scratch on each weather update. I suggest setting up a pathway and creating routings from that, especially on long ocean passages. As the race progresses, you can remove early pathway points and use the remaining pathway, starting from the boat.

You'll also find special situations when the race is longer than the grid forecast. Will be useful to have an update on tactics after the upcoming Osaka race.

If you use the new Sailonline iOS client for iPhones/iPads, there are some additional helpful hints. Happy to collaborate.
Posted by
VIbex


Users avatar

Posts
24
Registered at
2020-06-01 23:54:58
2020-08-29 19:20:19 - Re: qtVlm thread
Also, there's a nice even more introductory intro to qtVlm here: http://solfans.org/blog/routing/qtvlm/introduction-to-qtvlm/
Posted by
WSGUERIN


Users avatar

Posts
29
Registered at
2020-03-21 13:34:15
2020-08-30 15:04:08 - Re: qtVlm thread
Super writeup Satori. Pivot points figured out from the videos.

--- Last Edited by mfa_wsg at 2020-09-01 13:05:30 ---
Posted by
Kipper1258


Users avatar

Posts
251
Registered at
2015-06-18 22:08:49
2020-09-13 22:54:18 - qtVlm performance
Two things. Firstly, I have noticed that Simpilfy/Optimise runs orders of magnitudes fast if the qtVlm window is minimised (on Windows 10), and no graphics updates are happening. Can I make a suggestion that a configuration switch is added to disable graphics updates when Simplification/Optimisation is in progress. I think it will make a huge improvement in performance.

Secondly, I'm running a Dell Displaylink, and qtVlm does not seem to be able to recognise that I have a graphics card loaded. Consequently, all rendering is done in software. Java recognises and uses the card, by qt (C) does not. Any ideas?
Posted by
WSGUERIN


Users avatar

Posts
29
Registered at
2020-03-21 13:34:15
2020-09-24 20:39:26 - Re: qtVlm thread
Two questions:

1. How do you control level of simplification and optimization? (I've been just stopping them mid process) but are there subtleties and knobs to tune?

2. can you get wind speeds to show up on the arrow points? I found an old photo in Bimmer's thread that had the speeds showing.

TX. in advance as usual!!
Posted by
VIbex


Users avatar

Posts
24
Registered at
2020-06-01 23:54:58
2020-09-25 02:00:54 - Re: qtVlm thread
In Grib->Grib configuration (or the windsock in the toolbar, or ctrl-G), there's a Label configuration item to show a number.

I don't know that you can control the level of simplification and optimization, other than Optimum/Maximum (the names of my next 2 dogs, and I'll never know which is which).
Posted by
Satori


Users avatar

Posts
13
Registered at
2020-06-16 21:08:44
2020-10-01 16:55:47 - Re: qtVlm thread
If you read my Carib Rum Run 2020 Report you will see how I am making early use of Qt. Can I encourage a discussion lead by those who know better on Qt Settings and how they impact results - Boat Settings/Tacks & Gybes, Route Settings-Best Performance vs Best Accuracy, Edit Route - Wind/Polar Corrections.
Posted by
Satori


Users avatar

Posts
13
Registered at
2020-06-16 21:08:44
2020-10-01 17:22:59 - Re: qtVlm thread
Tx Vibex for your advice on WX Route updates vs creating a new Route. Unfortunately I did not see it until after the Carib Rum Run Race. You will see from my Report on that Race that I found out for myself during the Race. I might have done better than 9th if I had seen your advice earlier!!

Page: First Previous 27 28 29 30 31 32 33 Next

Please login to post a reply.

Races

Next Race: 00d 00h 00m

Current Races:

SSANZ Round North Island Race 2026 - Leg 4

The final challenge awaits in Leg Four of the Round North Island Series! From Napier, the fleet sets off on a 354 nautical mile run back to Auckland, completing the full circumnavigation where the journey began. Fatigue may be setting in, but this last leg could decide the overall standings. Sailing the fast and responsive Sun Fast 3600, our skippers will need sharp tactics and steady focus to finish the series strong and claim victory!

The start time for this race may change at short notice to align with the real race. The confirmed start date and time will be announced via an in-race “L” flag message — Please monitor race communications closely.
Race #2014
INFO by brainaid.de
Sun Fast 3600 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: RNI - SUPBUD - SYC
Race starts: Mar 13th 21:00 Registration will open soon
▶ Flash
GO TO RACE

SSANZ Round North Island Race 2026 - Leg 3

Leg Three of our Round North Island Series, in partnership with SSANZ, keeps the pressure on! From Cook Strait, the fleet turns north for a 187 nautical mile passage up the east coast to Napier. It may look like a quick overnighter, but shifting coastal winds and the ever-lively Cook Strait demand sharp focus. In our responsive Sun Fast 3600s, a proven short-handed racer and powerful downwind performer, tactical decisions and precise timing will make all the difference!

The start time for this race may change at short notice to align with the real race. The confirmed start date and time will be announced via an in-race “L” flag message — Please monitor race communications closely.
Race #2013
INFO by brainaid.de
Sun Fast 3600 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: RNI - SUPBUD - SYC
Race starts: Mar 08th 22:00 Registration Open!
▶ Flash
GO TO RACE

Dyer Dhow Derby 2026


Most winter weekends, SOLer wsguerin and his friends at the Mamaroneck Frostbite Association venture forth on Long Island Sound to race Dyer Dhows, originally designed as WWII tenders. Indestructible little boats, great comradeship and serious short sharp races of 10 to 20 minutes duration. Sailonline now invites you to experience the joys of the Dhow in winter, virtually, by way of a slightly longer 14nm race: from Mamaroneck to Execution Rocks, over to the Gong Buoy and back to Mamaroneck. And if the wind pipes up to 20kn and beyond, you'll find SOL's customized polar will plane, rather than nosedive!
Race #2017
INFO by brainaid.de
Dyer Dhow PARTICULARS
NAM_AWIP WX Updates:
0245 / 0845 / 1445 / 2045
Ranking: SPQ1 - SPCH - SYC
RACE CLOSE: Wednesday,
March 11 at 2300 UTC.
Race starts: Mar 07th 13:00 Registration Closed
▶ Flash
GO TO RACE

South China Sea Race 2026


Welcome all to the South China Sea and a virtual chase in Cookson 50’s of the Rolex South China Sea fleet, racing 650nm – as the local red-footed booby flies – from Hong Kong to Subic Bay on the southern tip of The Philippines’ Luzon Island. Chances are it will be a fast downwind ride, so see how you can keep up with the real-life fleet which we hope to be able to follow on our monitors.
Race #2016
INFOby brainaid.de
Cookson 50 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SUPBUD - SYC
RACE CLOSE: Saturday,
March 14 at 2300 UTC.
Race starts: Mar 04th 03:20 Registration Closed
▶ Flash
GO TO RACE

Iceland to the Falklands 2026

Welcome to an all-new route, the first of three Round the 'Old World' of Europe, Africa, Australia and Asia. To give each leg of the ROW a bit of length we'll try to hug the coasts as little as possible, so starting in Iceland our first leg of the series, which will also be the final leg of our Quarter 1 Ocean Championships takes us 7200nm to the Falklands, the full length of the Atlantic end to end. To make sure we'll get it done within the month we'll be sailing our Maxi Trimaran.
Race #2010
INFO by brainaid.de
Maxi Trimaran PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ1 - ROW - OCCH - SYC
Race starts: Mar 02nd 11:00 Registration Closed
▶ Flash
GO TO RACE

San Diego to Puerto Vallarta 2026

Welcome to California! Established in 1953 this 1000-mile run from San Diego to Puerto Vallarta on the Mexican Riviera has become a tradition and online as well the tradition strengthens with this the fourth time Sailonline is making the race available to virtual sailors. Let's see how our virtual SC70s perform against the real fleet!
Race #2015
INFO by brainaid.de
Santa Cruz 70 Particulars
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SUPBUD - SYC
RACE CLOSE: Friday,
March 13 at 2300 UTC.
Race starts: Feb 28th 20:00 Registration Closed
▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member KaSToR
  2. Sailonline Yacht Club Member WRmirekd
  3. Sailonline Yacht Club Member rafa
  4. Sailonline Yacht Club Member rumskib
  5. Sailonline Yacht Club Member Sax747
  6. Sailonline Yacht Club Member vida
  7. Sailonline Yacht Club Member CriticalHippo
  8. Sailonline Yacht Club Member CollegeFund
  9. Sailonline Yacht Club Member Panpyc
  10. Sailonline Yacht Club Member sassy63

View full list

Series

Mobile Client

SYC members have the benefit of access to our mobile/lightweight web client!

The mobile client