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authororwell96 <orwell@bleipb.de>2019-01-21 22:41:57 +0100
committerorwell96 <orwell@bleipb.de>2019-01-21 22:41:57 +0100
commitf162ebf63f00339dd1b698c051e7b6301bb2c508 (patch)
tree33da1977e38d69af39d1898b0fc2eb581f7b7945 /advtrains
parente915b61da6f18efa49b6afacb7e9ca181d59cc5c (diff)
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Avoid division through zero in get_acceleration
Diffstat (limited to 'advtrains')
-rw-r--r--advtrains/trainlogic.lua4
1 files changed, 4 insertions, 0 deletions
diff --git a/advtrains/trainlogic.lua b/advtrains/trainlogic.lua
index 1406080..a5323a9 100644
--- a/advtrains/trainlogic.lua
+++ b/advtrains/trainlogic.lua
@@ -185,6 +185,10 @@ function advtrains.get_acceleration(train, lever)
local acc_all = t_accel_all[lever]
local acc_eng = t_accel_eng[lever]
local nwagons = #train.trainparts
+ if nwagons == 0 then
+ -- empty train! avoid division through zero
+ return -1
+ end
local acc = acc_all + (acc_eng*train.locomotives_in_train)/nwagons
return acc
end