diff options
| -rw-r--r-- | trainlogic.lua | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/trainlogic.lua b/trainlogic.lua index 7d7fe9f..f8f8796 100644 --- a/trainlogic.lua +++ b/trainlogic.lua @@ -577,11 +577,12 @@ function advtrains.try_connect_trains_and_check_collision(id1, id2) --0.5: some grace interval, since else the couple entity does not appear for i=(advtrains.get_train_end_index(train2)+0.5),train2.index-0.5 do local testpos=advtrains.get_real_index_position(train2.path,i) + --must look for center positions of both trains and compare these, else bugs. if vector.distance(testpos, backpos1) < 0.5 then - local v2_sign = math.sign(i - ((train2.index-0.5) - ( (train2.index-0.5)-(advtrains.get_train_end_index(train2)+0.5) / 2 ))) + --local v2_sign = math.sign(i - ((train2.index-0.5) - ( (train2.index-0.5)-(advtrains.get_train_end_index(train2)+0.5) / 2 ))) --TODO physics train1.velocity=1 - train2.velocity=v2_sign + train2.velocity=advtrains.trains_facing(train1, train2) and -1 or 1 train1.recently_collided_with_env=true train2.recently_collided_with_env=true return @@ -589,7 +590,7 @@ function advtrains.try_connect_trains_and_check_collision(id1, id2) if vector.distance(testpos, frontpos1) < 0.5 then local v2_sign = math.sign(i - ((train2.index-0.5) - ( (train2.index-0.5)-(advtrains.get_train_end_index(train2)+0.5) / 2 ))) train1.velocity=-1 - train2.velocity=v2_sign + train2.velocity=advtrains.trains_facing(train1, train2) and -1 or 1 train1.recently_collided_with_env=true train2.recently_collided_with_env=true return @@ -599,6 +600,23 @@ function advtrains.try_connect_trains_and_check_collision(id1, id2) end end +--true when trains are facing each other. needed on colliding. +-- check done by iterating paths and checking their direction +--returns nil when not on the same track at all. this distinction may not always be needed. +function advtrains.trains_facing(train1, train2) + local sr_pos=train1.path[math.floor(train1.index)] + local sr_pos_p=train1.path[math.floor(train1.index)-1] + + for i=advtrains.minN(train2.path), advtrains.maxN(train2.path) do + if vector.equals(sr_pos, train2.path[i]) then + if vector.equals(sr_pos_p, train2.path[i+1]) then return true end + if vector.equals(sr_pos_p, train2.path[i-1]) then return false end + return nil + end + end + return nil +end + --order of trains may be irrelevant in some cases. check opposite cases. TODO does this work? --pos1 and pos2 are just needed to form a median. function advtrains.spawn_couple_if_neccessary(pos1, pos2, tid1, tid2, train1_is_backpos, train2_is_backpos) @@ -736,4 +754,4 @@ function advtrains.invalidate_all_paths() v.min_index_on_track=nil v.max_index_on_track=nil end -end
\ No newline at end of file +end |