Lap simulator script. generates laps based on elapsed distance - useful in a non-circuit environment

lap_simulator.lua

--Lap simulator script
--Ensure GPS Distance channel is disabled
--Ensure Race Timing is disabled
--Requires a GPS lock for proper operation

--sets the length of the lap desired, in miles.
lapLength = 1

setTickRate(10)

lcId = addChannel("LapCount", 10, 0)
ltId = addChannel("LapTime", 10, 0)
dId = addChannel("Distance", 10, 4)
totalDist= 0
lapCount = 0
lastTime = 0
lapTime = 0
totalTime = 0
totalDist = 0

function onTick()
  --calculate and update the current lap as needed

  local currentSpeed = getGpsSpeed() --MPH
  local currentTime = getUptime() --Milliseconds
  local elapsedTime = currentTime - lastTime
  totalTime = totalTime + elapsedTime
  local elapsedHours = elapsedTime * 0.000000277778
  local dist = currentSpeed * elapsedHours
  lastTime = currentTime
  totalDist = totalDist + dist
  setChannel(dId, totalDist) --update Distance channel 
  if totalDist > lapLength then
    lapCount = lapCount + 1
    setChannel(lcId, lapCount) --update LapCount channel
    setChannel(ltId, totalTime / 60000) --update LapTime virtual channel
    totalTime = 0
    totalDist = 0
  end
end