diff options
Diffstat (limited to 'trainlogic.lua')
| -rw-r--r-- | trainlogic.lua | 44 |
1 files changed, 29 insertions, 15 deletions
diff --git a/trainlogic.lua b/trainlogic.lua index 5b9390c..11849fd 100644 --- a/trainlogic.lua +++ b/trainlogic.lua @@ -34,8 +34,10 @@ function endstep() end end +--TODO: these values need to be integrated when i remove traintypes. advtrains.train_accel_force=2--per second and divided by number of wagons advtrains.train_brake_force=3--per second, not divided by number of wagons +advtrains.train_roll_force=0.5--per second, not divided by number of wagons, acceleration when rolling without brake advtrains.train_emerg_force=10--for emergency brakes(when going off track) advtrains.audit_interval=30 @@ -171,6 +173,9 @@ function advtrains.train_step(id, train, dtime) if not train.velocity then train.velocity=0 end + if not train.movedir or (train.movedir~=1 and train.movedir~=-1) then + train.movedir=1 + end --very unimportant thing: check if couple is here if train.couple_eid_front and (not minetest.luaentities[train.couple_eid_front] or not minetest.luaentities[train.couple_eid_front].is_couple) then train.couple_eid_front=nil end if train.couple_eid_back and (not minetest.luaentities[train.couple_eid_back] or not minetest.luaentities[train.couple_eid_back].is_couple) then train.couple_eid_back=nil end @@ -201,13 +206,12 @@ function advtrains.train_step(id, train, dtime) local back_off_track=train.min_index_on_track and train_end_index<train.min_index_on_track if front_off_track and back_off_track then--allow movement in both directions if train.tarvelocity>1 then train.tarvelocity=1 end - if train.tarvelocity<-1 then train.tarvelocity=-1 end elseif front_off_track then--allow movement only backward - if train.tarvelocity>0 then train.tarvelocity=0 end - if train.tarvelocity<-1 then train.tarvelocity=-1 end + if train.movedir==1 and train.tarvelocity>0 then train.tarvelocity=0 end + if train.movedir==-1 and train.tarvelocity>1 then train.tarvelocity=1 end elseif back_off_track then--allow movement only forward - if train.tarvelocity>1 then train.tarvelocity=1 end - if train.tarvelocity<0 then train.tarvelocity=0 end + if train.movedir==-1 and train.tarvelocity>0 then train.tarvelocity=0 end + if train.movedir==1 and train.tarvelocity>1 then train.tarvelocity=1 end end --update advtrains.detector @@ -269,9 +273,9 @@ function advtrains.train_step(id, train, dtime) --this time, based on NODES and the advtrains.detector.on_node table. local collpos local coll_grace=1 - if train.velocity>0 then + if train.movedir==1 then collpos=advtrains.get_real_index_position(path, train.index-coll_grace) - elseif train.velocity<0 then + else collpos=advtrains.get_real_index_position(path, train_end_index+coll_grace) end if collpos then @@ -282,7 +286,8 @@ function advtrains.train_step(id, train, dtime) if advtrains.detector.on_node[testpts] and advtrains.detector.on_node[testpts]~=id then --collides train.recently_collided_with_env=true - train.velocity=-0.5*train.velocity + train.velocity=0.5*train.velocity + train.movedir=train.movedir*-1 train.tarvelocity=0 end end @@ -345,32 +350,41 @@ function advtrains.train_step(id, train, dtime) if train.locomotives_in_train==0 then train.tarvelocity=0 end + --make brake adjust the tarvelocity if necessary + if train.brake and (math.ceil(train.velocity)-1)<train.tarvelocity then + train.tarvelocity=math.max((math.ceil(train.velocity)-1), 0) + end --apply tarvel(but with physics in mind!) if train.velocity~=train.tarvelocity then local applydiff=0 local mass=#train.trainparts - local diff=math.abs(train.tarvelocity)-math.abs(train.velocity) + local diff=train.tarvelocity-train.velocity if diff>0 then--accelerating, force will be brought on only by locomotives. --print("accelerating with default force") applydiff=(math.min((advtrains.train_accel_force*train.locomotives_in_train*dtime)/mass, math.abs(diff))) else--decelerating if front_off_track or back_off_track or train.recently_collided_with_env then --every wagon has a brake, so not divided by mass. --print("braking with emergency force") - applydiff=(math.min((advtrains.train_emerg_force*dtime), math.abs(diff))) - else + applydiff= -(math.min((advtrains.train_emerg_force*dtime), math.abs(diff))) + elseif train.brake then --print("braking with default force") - applydiff=(math.min((advtrains.train_brake_force*dtime), math.abs(diff))) + --no math.min, because it can grow beyond tarvelocity, see up there + --dont worry, it will never fall below zero. + applydiff= -((advtrains.train_brake_force*dtime)) + else + --print("roll") + applydiff= -(math.min((advtrains.train_roll_force*dtime), math.abs(diff))) end end - train.last_accel=(applydiff*math.sign(train.tarvelocity-train.velocity)) - train.velocity=train.velocity+train.last_accel + train.last_accel=(applydiff*train.movedir) + train.velocity=math.min(math.max( train.velocity+applydiff , 0), advtrains.all_traintypes[train.traintype].max_speed) else train.last_accel=0 end --move --TODO 3,5 + 0.7 - train.index=train.index and train.index+((train.velocity/(train.path_dist[math.floor(train.index)] or 1))*dtime) or 0 + train.index=train.index and train.index+(((train.velocity*train.movedir)/(train.path_dist[math.floor(train.index)] or 1))*dtime) or 0 end |