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:

Race to Up Helly Aa 2026

A-OI!!! The fiery spirit of Shetland’s legendary Up Helly Aa returns, and Sailonline’s annual race to Lerwick is once again upon us. Covering 383 nautical miles from Aberdeen, SOLers will tackle winter waters steeped in Viking tradition. This year, we race the classic Frers 33, a proven cruiser-racer born from the golden era of offshore racing and still a sturdy performer both on the virtual and real water. Can you master the course and reach Lerwick in time for the flames?

SAILING NOTE: Gruney may be approached from any direction but must be passed for rounding purposes as indicated on the chart.
Race #2005
INFO by brainaid.de
Frers 33 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
SYC
Race starts: Jan 30th 17:00 Registration will open soon
▶ Flash
GO TO RACE

Red Eye - Hobart Convict Run 2026

Back in 2010, one of our SOLers of the first hour, AUS_Scott76, came up with this ‘Convict Run’ out from Hobart, past Cape Raoul and the penal colony of Port Arthur, round Tasman Island, up and back down the east coast of Tasmania, to finish with a tight technical run – so Scott called it – up the picturesque D'entrecasteaux Channel, home to Hobart once again. It’s 250nm, ideal for a bit of ‘Red Eye’ in comfortable Finngulf 43’s, and if the original idea was to pick up some convicts on the way for a bit of R&R and sea air, you may always drop’m back before returning to Hobart!
Race #2002
INFOby brainaid.de
FG 43 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: RED - SYC
Race starts: Jan 27th 12:00 Registration Open!
▶ Flash
GO TO RACE

New Ice Age 2026 - Longyearbyen to Browerville


Although we have by no means exhausted the possibilities of ice boating on lakes at high latitudes or high altitudes, it was noticeable that as our 2025 Series progressed, there were calls from time to time for longer-distance challenges, and so in response to these calls we will pretend that global warming has reversed and as a result the coastal waters of Antarctica and Russia and Canada have fully (and smoothly!) frozen over offering us the possibility of a 4-race New Ice Age series in our trusted no-PL DN machines. Our first leg takes us 2600nm from Svalbard’s Longyearbyen east to North Alaska’s Browerville. You’ll be a few days on the ice, so dress warmly and take some provisions; go!
Race #1968
INFOby brainaid.de
DN PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: NIA - SYC
Race starts: Jan 22nd 07:00 Registration Open!
▶ Flash
GO TO RACE

Cross the Convergence 2026 - Robinson Crusoe to Galapagos


Welcome to our first race of a new series of ocean voyages across the World’s convergence zones, this first race taking you north from south of the Tropic of Capricorn to the Equator-straddling Galapagos, home of magical iguanas and other exotic fauna (but no mythical kings, Dory) Departing from the island where in 1704 adventurer Alexander Selkirk inspired Daniel Defoe to write the best-seller "The Life and Adventures of Robinson Crusoe", by debarking off the unsound "HMS Cinque Ports", four months before she foundered off the coast of present-day Colombia, we will sail the 2200nm in our decidedly sounder and faster than the " Cinque Ports",
Ocean 50 !
Race #1983
INFOby brainaid.de
Ocean 50 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: CCZ - SYC
RACE CLOSE: Friday,
January 30 at 2300 UTC.
Race starts: Jan 16th 18:00 Registration Closed
▶ Flash
GO TO RACE

Cape Town to Rio 2026

Welcome to South Africa and RCYC's classic transatlantic Cape2Rio Race from Cape Town, South Africa, to Rio de Janeiro, Brazil. First run in 1971, this run is buddied with the IRL, Cape2Rio 2025 arranged by the Royal Cape Yacht Club with the cooperation of the
Iate Clube do Rio de Janeiro Despite this being announced the 2025 race (starting dec. 27) it is the 2026 SOL championship kickoff. This virtual version, will be raced once again in Mark Mills' 74ft speedster, the stunning C2R74.
Race #1996 INFO
by brainaid.de
C2R74 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
OCQ1 - OCCH - SUPBUD - SYC
RACE CLOSE: Monday,
January 26 at 2300 UTC.
Race starts: Dec 27th 12:00 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 CriticalHippo
  4. Sailonline Yacht Club Member rafa
  5. Sailonline Yacht Club Member Sax747
  6. Sailonline Yacht Club Member rumskib
  7. Sailonline Yacht Club Member vida
  8. Sailonline Yacht Club Member bonknhoot
  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