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| author | ywang <yw05@forksworld.de> | 2019-12-07 16:48:19 +0100 |
|---|---|---|
| committer | ywang <yw05@forksworld.de> | 2019-12-07 16:48:19 +0100 |
| commit | a404f83ebb6aa26b16e56debc2d6d86f52df680e (patch) | |
| tree | a9b368598609793a6a2f5bf44cf1c04449ab55c7 /advtrains/lzb.lua | |
| parent | 45f5406e7ebf22f0c2594c8e8a4e734cc23479b7 (diff) | |
| download | advtrains-a404f83ebb6aa26b16e56debc2d6d86f52df680e.tar.gz advtrains-a404f83ebb6aa26b16e56debc2d6d86f52df680e.tar.bz2 advtrains-a404f83ebb6aa26b16e56debc2d6d86f52df680e.zip | |
Improved quadratic function solver; added wrapper for math.sqrt()
Diffstat (limited to 'advtrains/lzb.lua')
| -rw-r--r-- | advtrains/lzb.lua | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/advtrains/lzb.lua b/advtrains/lzb.lua index 3961438..30d7972 100644 --- a/advtrains/lzb.lua +++ b/advtrains/lzb.lua @@ -94,7 +94,7 @@ LZB point itself, and not related to the emergency brake. ]] function advtrains.lzb_map_entry(train, lzb) local ret = {[0]={},[1]={},[2]={},[3]={}} - if (not train) or (not lzb) then return ret end + if not (train and lzb) then return ret end local ti = train.index local v0 = train.velocity local v1 = lzb.spd @@ -168,7 +168,7 @@ function advtrains.lzb_get_limit_by_entry(train, lzb) local s = train.index - lzbmap[ret.lever].i local a = advtrains.get_acceleration(train, ret.lever) local v0 = lzbmap[ret.lever].v - ret.velocity = math.sqrt(2*a*s - v0*v0) + ret.velocity = math.abs(advtrains.safesqrt(2*a*s - v0*v0)) end if ret.velocity < train.velocity -1 then ret.lever = ret.lever - 1 end return ret |