Cannot Get FGWind* pointer in JSBSim 1.1.11

[BadboyIntheLoop]

Hello the Pro,
I wanna change the default codes that interface with matlab (JSBSimInterface and JSBSim_SFunction) in order to get/set more variables! For get/set wind parameter, I declared like as following in JSBSimInterface.h:
FGWinds *winds;
And using it in source file JSBSimInterface.cpp:
fdmExec = new FGFDMExec;
winds = fdmExec->GetWinds()
I'm using MSVC C++ 2019 compiler but during compiling I get an error:

Error using mex
JSBSimInterface.cpp
C:\JSBSim\matlab\JSBSimInterface.cpp(763): error C2027: use of undefined type 'JSBSim::FGWinds'
.\include\FGFDMExec.h(63): note: see declaration of 'JSBSim::FGWinds'

I actually dont why. Clearly, I declared it fully though! Pls help me at this situation. So many thanks!!!

[seanmcleod]

But have you included the header file #include "models/atmosphere/FGWinds.h" anywhere?

[BadboyIntheLoop]

But have you included the header file #include "models/atmosphere/FGWinds.h" anywhere?

Thank you so much, It 's fixed!
<3

[agodemar]

@BadboyIntheLoop In case you come up with an actual improvement of the JSBSim/Matlab/Simulink interface it would be nice if that could be incorporated into the official codebase

[bcoconni]

This topic has been moved to JSBSim Discussions as per the issue template statement: Issues that are neither bug reports or feature requests will be transferred to Discussions by the team and the issue will be locked and closed..

Support for this topic will therefore continue within this discussion. Thanks for your understanding.

[RaghunandanVenkatesh]

I get this error. Can someone please help
Code:

_fg_winds = std::make_unique<JSBSim::FGWinds>(_fdmexec);
  double vx_fts = 20;
  double vy_fts = 20;
  double vz_fts = 20;
  JSBSim::FGWinds::tType turbulence = JSBSim::FGWinds::ttStandard;

  _fg_winds->SetWindNED(vx_fts, vy_fts, vz_fts);
  _fg_winds->SetTurbType(turbulence);
  /// allowable range: 0-7, 3=light, 4=moderate, 6=severe turbulence
  _fg_winds->SetProbabilityOfExceedence(4); 
  // fg_wind.SetGustNED();
  _fg_winds->SetWindspeed(20);
  _fg_winds->SetWindPsi(180); // wind direction in degrees
  
  if(!_fg_winds->Run(false)){
    std::cout << " winds active " << std::endl;
  }

ERROR:

Failed to tie property atmosphere/psiw-rad to object methods
Failed to tie property atmosphere/wind-north-fps to indexed object methods
Failed to tie property atmosphere/wind-east-fps to indexed object methods
Failed to tie property atmosphere/wind-down-fps to indexed object methods
Failed to tie property atmosphere/wind-mag-fps to object methods
Failed to tie property atmosphere/gust-north-fps to indexed object methods
Failed to tie property atmosphere/gust-east-fps to indexed object methods
Failed to tie property atmosphere/gust-down-fps to indexed object methods
Failed to tie property atmosphere/cosine-gust/startup-duration-sec to object methods
Failed to tie property atmosphere/cosine-gust/steady-duration-sec to object methods
Failed to tie property atmosphere/cosine-gust/end-duration-sec to object methods
Failed to tie property atmosphere/cosine-gust/magnitude-ft_sec to object methods
Failed to tie property atmosphere/cosine-gust/frame to object methods
Failed to tie property atmosphere/cosine-gust/X-velocity-ft_sec to object methods
Failed to tie property atmosphere/cosine-gust/Y-velocity-ft_sec to object methods
Failed to tie property atmosphere/cosine-gust/Z-velocity-ft_sec to object methods
Failed to tie property atmosphere/cosine-gust/start to object methods
Failed to tie property atmosphere/updownburst/number-of-cells to object methods
Failed to tie property atmosphere/turb-north-fps to indexed object methods
Failed to tie property atmosphere/turb-east-fps to indexed object methods
Failed to tie property atmosphere/turb-down-fps to indexed object methods
Failed to tie property atmosphere/p-turb-rad_sec to indexed object methods
Failed to tie property atmosphere/q-turb-rad_sec to indexed object methods
Failed to tie property atmosphere/r-turb-rad_sec to indexed object methods
Failed to tie property atmosphere/turb-type to object methods
Failed to tie property atmosphere/turb-rate to object methods
Failed to tie property atmosphere/turb-gain to object methods
Failed to tie property atmosphere/turb-rhythmicity to object methods
Failed to tie property atmosphere/turbulence/milspec/windspeed_at_20ft_AGL-fps to object methods
Failed to tie property atmosphere/turbulence/milspec/severity to object methods
Failed to tie property atmosphere/total-wind-north-fps to indexed object methods
Failed to tie property atmosphere/total-wind-east-fps to indexed object methods
Failed to tie property atmosphere/total-wind-down-fps to indexed object methods
 winds active

[ParamDeshpande]

I'm facing a similar issue when trying to integrate wind in the px4-JSBSim-bridge repo.

[seanmcleod]

Hmm, instead of:

_fg_winds = std::make_unique<JSBSim::FGWinds>(_fdmexec);

You should probably be calling the GetWinds() method of FGFDMExec.

std::shared_ptr<FGWinds> FGFDMExec::GetWinds(void) const
{
  return static_pointer_cast<FGWinds>(Models[eWinds]);
}