Heading via lua

[MrBlahh]

anyone worked out heading via lua?

not sure it's the best place to do it, due to jitter you would have to average out a few readings to calculate it reasonably

[burn4005]

came accross this post when looking to see if this bridge had been crossed..

I've created a function that will give heading angle in degrees.I haven't tested this yet but in theory it should work if Lua is fully implemented.

I got the function from:
https://www.igismap.com/formula-to-find ... longitude/

Code: Select all

function headingcalc(lat2,lon2,lat1,lon1)

  rlat1 = math.rad(lat1)
  rlon1 = math.rad(lon1)
  rlat2 = math.rad(lat2)
  rlon2 = math.rad(lon2)
  dlon = rlon2-rlon1
  x = math.cos(rlat2) * math.sin(dlon)
  y = math.cos(rlat1) * math.sin (rlat2) - math.sin(rlat1) * math.cos(rlat2) * math.cos(dlon)
  rhead = math.atan2(x,y)
  return math.deg(rhead)
end

a lot of math functions to do, not sure how computationally expensive it will be. i'd operate it at a much lower tick rate than the GPS. maybe 10hz instead of 50?

[thoraxe]

anyone worked out heading via lua?

not sure it's the best place to do it, due to jitter you would have to average out a few readings to calculate it reasonably

I'm curious why you wanted to implement this. I may have a similar need with integration with an AEM CD-7 dash.