Weather Routing Plug In - Does it Actually Work

[registry]

try to attach (pdf == tar.gz)

[seandepagnier]

Originally Posted by registry

I tried this and that, removed .opencpn completly, reinstalled new, didn't touch settings... nothing helped. It complains that it has "No Data: Fail" (if climatology is on) or "Grib:Fail" if Climatology is off.



See attach (Configuration, polars, boat, grib file, screenshots)

This error is probably because the grib file loaded does not cover the area and/or time specified in the configuration. To be sure:



1) Ensure the start and end positions are within the grib area.


2) Move the grib slider to the start time you want, and click the "grib time" button in the configuration.

[registry]

Originally Posted by boat_alexandra

This error is probably because the grib file loaded does not cover the area and/or time specified in the configuration. To be sure:



1) Ensure the start and end positions are within the grib area.


2) Move the grib slider to the start time you want, and click the "grib time" button in the configuration.

It does cover positions and timeframe as well. You can see it in Screensots, P1 (stsarting position) and P2 (end position) ar on western south baltic . Distance between them approx 10 nm, so, 3h should be runnign time and grib is for 10 days long.



Why Error is "Grib:failed" despite running "Grib" plugin? Can it bee that WR cannot retrieve data from Grib Plugin?

[Rasbats]

Interesting. Maybe a red herring, but with the new beta I am having trouble with the 'Sail' option for 'ShipDriver_pi'. This relies on plugin messaging, asking for wind from the Grib plugin.

Mike

[stelian]

Something is wrong indeed with the grib request:


void RouteMap::SetNewGrib(GribRecordSet *grib)
{
std::cout << "griba " << grib << std::endl;
std::cout << "gribb " << grib->m_GribRecordPtrArray[Idx_WIND_VX] << std::endl;
std::cout << "gribc " << grib->m_GribRecordPtrArray[Idx_WIND_VY] << std::endl;
if(!grib ||
!grib->m_GribRecordPtrArray[Idx_WIND_VX] ||
!grib->m_GribRecordPtrArray[Idx_WIND_VY])
return;



Shows:


griba 0x55d827ce9eb0
gribb 0x5c6c9880
gribc 0

[Rasbats]

Found the problem with ShipDriver and it may be the same for Weather Routing.


The file 'GribRecordSet.h' in the main OpenCPN program has changed with the new beta. If WxR has not been updated to use this version it could be the reason for failure. Fixed ShipDriver by updating 'GribRecordSet.h'.

Mike

[stelian]

Originally Posted by Rasbats

Found the problem with ShipDriver and it may be the same for Weather Routing.


The file 'GribRecordSet.h' in the main OpenCPN program has changed with the new beta. If WxR has not been updated to use this version it could be the reason for failure. Fixed ShipDriver by updating 'GribRecordSet.h'.

Mike

Confirmed ! WR works perfectly with the new header file.

However, I wonder if by replacing the file the plugin will remain compatible with older OpenCPN versions ? I didn't see any conditional in the file...


Stelian.

[nohal]

It will not. It also will not if it switches to the new API version with multicanvas support.

[stelian]

Originally Posted by nohal

It will not. It also will not if it switches to the new API version with multicanvas support.

What's the recommended way of fixing this in this case ?

[did-g]

Originally Posted by stelian

Confirmed ! WR works perfectly with the new header file.

However, I wonder if by replacing the file the plugin will remain compatible with older OpenCPN versions ? I didn't see any conditional in the file...


Stelian.

There's a PR

https://github.com/seandepagnier/wea...ng_pi/pull/111
with all the stuff needed for a proper O V5 plugin.


Ther's also a new JSON grib msg:
GRIB_VALUES_REQUEST
Plugin like shipdriver could keep the old GribRecordSet.h for source compatibility and use this msg for requesting wind, current, gust or swell values.
Using the binary interface is not always the most efficient way, it's using a lot of RAM on 32bits system (window) you can hit the 2 or 3GB limit.

[stelian]

Originally Posted by did-g

There's a PR

https://github.com/seandepagnier/wea...ng_pi/pull/111
with all the stuff needed for a proper O V5 plugin.

Perfect ! It's up to Sean now.

[stelian]

Sean has merged the PR, everything works again.

[registry]

Works for me as well. Sorry for whinning :-)