Weather Routing

[seandepagnier]

Could you try deleting the Boat.xml file. I believe on windows it is in:

users/Public/Application Data/opencpn/plugins/weather_routing/Boat.xml

To be safe maybe delete the whole directory.

I can make the program freeze with some boat settings, but not the default one, so it is quite possible you had these settings. I will try to fix the issue.

[rgleason]

Sean, I cleared all xml files related to boat.xml and weatherrouting.xml and the plugin is working now. I had to re enter some waypoints and routes and setup the boat file a bit, but is it working and doing routing with grib and climatology in 3.3.1824.
Seems pretty fast. Will do more later.
Hope you can fix the clitch for other users, so it does not happpen.

[rgleason]

This plugin works like a charm now with climatology and grib. For example I've been trying to reduce calc time with some tests. Here are some things you can do to make the calc faster:
1. 24 hour interval.
2. Generate 10 degree steps Course relative to the wind.
3. Constraints Max Div Course 60 degrees, Max course angle 120, Max search 70
4. Max latitude 55
6. Can you come up with other ways of making it fast and efficient?

[tom_BigSpeedy]

Hi,
I pulled the latest changes from git and tried to compile under VC2010,Win7

I get an compile error in BoatDialog.cpp, starting with line 462 :
-------------------
...
3>..\src\BoatDialog.cpp(462): error C2057: expected constant expression
3>..\src\BoatDialog.cpp(462): error C2466: cannot allocate an array of constant size 0
3>..\src\BoatDialog.cpp(462): error C2133: 'vmgs' : unknown size
3>..\src\BoatDialog.cpp(463): error C2057: expected constant expression
3>..\src\BoatDialog.cpp(463): error C2466: cannot allocate an array of constant size 0
3>..\src\BoatDialog.cpp(463): error C2133: 'windspeeds' : unknown size
3>..\src\BoatDialog.cpp(505): error C2057: expected constant expression
3>..\src\BoatDialog.cpp(505): error C2466: cannot allocate an array of constant size 0
3>..\src\BoatDialog.cpp(505): error C2133: 'values' : unknown size
--------------
Looking into the source code it seems like VC2010 has a problem with
a dynamic variable declaration like

455 int mul = 5, count = mul*num_wind_speeds - 1;

and then in line 462 defining a struct SailingVMG based on count:
...
462 SailingVMG vmgs[count];
463 double windspeeds[count];
...
505 double values[count];
...

I hope that helps

Tom

[seandepagnier]

Originally Posted by rgleason

This plugin works like a charm now with climatology and grib. For example I've been trying to reduce calc time with some tests. Here are some things you can do to make the calc faster:
1. 24 hour interval.
2. Generate 10 degree steps Course relative to the wind.
3. Constraints Max Div Course 60 degrees, Max course angle 120, Max search 70
4. Max latitude 55
6. Can you come up with other ways of making it fast and efficient?

You are going to get a much bigger speedup by using newton's method not runge-kutta (it is about 4 times slower)

10 degree steps is a bit coarse.. I usually use 7 or less. The other way is to reduce max course angle down to 60 or less.. This will make it run a lot faster too, but if you do this you really have to optimize tacking on the vmg tab in the boat setup or upwind courses won't work. I explain this in the information page.

Out of curiosity, how long did it take? It should show the runtime on the statistics window.

[seandepagnier]

Originally Posted by tom_BigSpeedy

Hi,
I pulled the latest changes from git and tried to compile under VC2010,Win7

I get an compile error in BoatDialog.cpp, starting with line 462 :
-------------------
.....

3>..\src\BoatDialog.cpp(505): error C2133: 'values' : unknown size
--------------
Looking into the source code it seems like VC2010 has a problem with
a dynamic variable declaration like


I hope that helps

Tom

Yes, the problem is VC. I am in the middle of rewriting this so it will probably fix it.

[rgleason]

Sean, thanks for suggestions:
Using Newtons Method as its faster 4x
Using Climatology and Grib 8 day.
Changed to 7 degrees per your suggestion
Lizard to Newport =2 seconds
Newport to Lizard =3 seconds
=Awesome fast

- Latest git pull, has some errors. Sent to you via email.

[seandepagnier]

I think I fixed the visual studio specific errors now.

I have been working on the boat dialog quite a bit, so it should be better, but there is so much I can possibly do.

[seandepagnier]

Originally Posted by rgleason

Sean, thanks for suggestions:
Using Newtons Method as its faster 4x
Using Climatology and Grib 8 day.
Changed to 7 degrees per your suggestion
Lizard to Newport =2 seconds
Newport to Lizard =3 seconds
=Awesome fast

- Latest git pull, has some errors. Sent to you via email.

You can see why speed is important, if you use batch mode, and generate configurations leaving every day for a month (to find best departure time) it will take about a minute to compute all of them now. Of course with dual or quad core, you can expect much faster results.

It is possible to double or triple the speed again as well.

[seglar-lulle]

Hi,

A couple of weeks ago I participated in a regatta (ÅF Offshore race) with periodically a bit poor wind conditions, and on the regatta blog there was a boat that wrote this little quiz:
- Do you know the difference between grib files and burning toilet paper?
-- Err, well - no …
- Burning toilet paper actually shows you where it is blowing from…

Despite the formidable qualities of burning toilet paper I have taken on the slightly more systematic approach and I am trying to build some technical support system for the boat. I did attempt to build it on Raspberry Pi, but for various reasons I have now abandoned that. Instead I have started with Intel NUC 3815 and Win7 64bit. OpenCPN works like a charm. The grib plugin works perfectly. But when I try to compile the weather routing plugin I get all kinds of errors.

I have set up my environment according to Compiling - Windows | Official OpenCPN Homepage and downloaded sources for OpenCPN and the weather routing plugin.

The build can’t find “zlib.h”. I can see in “CMakeLists.txt” that there a couple of lines commented that has to do with that. I have tried uncommenting those lines, but get other problems. Unfortunately I am not very used to c++ and c environments.

Any ideas perhaps? Would be most appreciated..

[seandepagnier]

Keep in mind I am not a windows user, so I periodically break the build using visual studio (I test with mingw which catches about 50% of the gcc linux vs msvc differences)

I fixed the problem just now in git, should compile for you.

[seandepagnier]

Another idea,

Try without grib selected, and use a timestep of 15 minutes not 4 hours (it's much too long for the route you are doing)

Still I have no crashes even with the wrong options.

[seglar-lulle]

Hi,

Tried with:

git fetch --all <- Says (delta 5). Ok?

cd build
cmake ..
cmake --build .

Still no 'zlib.h' found.

[seandepagnier]

I don't think "git fetch" merges.

So you must then type "git merge" Alternately "git pull" will fetch and merge.

[seglar-lulle]

Hi,

Thanks! I am learning here...

Now it crashes on missing files for json:

1>------ Build started: Project: ZERO_CHECK, Configuration: Debug Win32 ------
1> Checking Build System
1> CMake does not need to re-run because C:/Projects/GitHub/weather_routing_pi/build/CMakeFiles/generate.stamp is up-to-date.
2>------ Build started: Project: weather_routing-i18n, Configuration: Debug Win32 ------
3>------ Build started: Project: LIB_BZIP, Configuration: Debug Win32 ------
2> weather_routing_pi-i18n: Done.
3> LIB_BZIP.vcxproj -> C:\Projects\GitHub\weather_routing_pi\build\Debug\ LIB_BZIP.lib
4>------ Build started: Project: weather_routing_pi, Configuration: Debug Win32 ------
4> Creating library C:/Projects/GitHub/weather_routing_pi/build/Debug/weather_routing_pi.lib and object C:/Projects/GitHub/weather_routing_pi/build/Debug/weather_routing_pi.exp
4>LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
4>jsonval.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) void __cdecl wxOnAssert(wchar_t const *,int,char const *,wchar_t const *,wchar_t const *)" (__imp_?wxOnAssert@@YAXPB_WHPBD00@Z) referenced in function "public: void __thiscall wxJSONInternalArray::RemoveAt(unsigned int,unsigned int)" (?RemoveAt@wxJSONInternalArray@@QAEXII@Z)
4>jsonreader.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) void __cdecl wxOnAssert(wchar_t const *,int,char const *,wchar_t const *,wchar_t const *)" (__imp_?wxOnAssert@@YAXPB_WHPBD00@Z)
4>jsonwriter.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) void __cdecl wxOnAssert(wchar_t const *,int,char const *,wchar_t const *,wchar_t const *)" (__imp_?wxOnAssert@@YAXPB_WHPBD00@Z)
4>jsonval.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) void __cdecl wxLogTrace(wchar_t const *,wchar_t const *,...)" (__imp_?wxLogTrace@@YAXPB_W0ZZ) referenced in function "public: class wxJSONValue & __thiscall wxJSONValue::Item(class wxString const &)" (?Item@wxJSONValue@@QAEAAV1@ABVwxString@@@Z)
4>jsonreader.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) void __cdecl wxLogTrace(wchar_t const *,wchar_t const *,...)" (__imp_?wxLogTrace@@YAXPB_W0ZZ)
4>jsonwriter.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) void __cdecl wxLogTrace(wchar_t const *,wchar_t const *,...)" (__imp_?wxLogTrace@@YAXPB_W0ZZ)
4>C:\Projects\GitHub\weather_routing_pi\build\Debu g\weather_routing_pi.dll : fatal error LNK1120: 2 unresolved externals
========== Build: 3 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Any ideas?