diff options
Diffstat (limited to 'advtrains/trainlogic.lua')
| -rw-r--r-- | advtrains/trainlogic.lua | 321 |
1 files changed, 98 insertions, 223 deletions
diff --git a/advtrains/trainlogic.lua b/advtrains/trainlogic.lua index 0f2a66e..442d6bf 100644 --- a/advtrains/trainlogic.lua +++ b/advtrains/trainlogic.lua @@ -139,6 +139,7 @@ minetest.register_on_joinplayer(function(player) advtrains.hhud[player:get_player_name()] = nil --independent of this, cause all wagons of the train which are loaded to reattach their players --needed because already loaded wagons won't call reattach_all() + local pname = player:get_player_name() local id=advtrains.player_to_train_mapping[pname] if id then for _,wagon in pairs(minetest.luaentities) do @@ -394,7 +395,7 @@ function advtrains.train_step_b(id, train, dtime) local back_off_track=train.end_index<train.path_trk_b train.off_track = front_off_track or back_off_track - if back_off_track and (not v_cap or v_cap > 1) then + if back_off_track and (not sit_v_cap or sit_v_cap > 1) then --atprint("in train_step_b: applying back_off_track") sit_v_cap = 1 elseif front_off_track then @@ -587,12 +588,76 @@ function advtrains.train_step_b(id, train, dtime) else --atprint("in train_step_b: movement calculation reusing from LZB newindex=",new_index_curr_tv) end - + -- if the zeroappr mechanism has hit, go no further than zeroappr index if lzb_next_zero_barrier and new_index_curr_tv > lzb_next_zero_barrier then --atprint("in train_step_b: Zero barrier hit, clipping to newidx_tv=",new_index_curr_tv, "zb_idx=",lzb_next_zero_barrier) new_index_curr_tv = lzb_next_zero_barrier end + + -- New same-track collision system - check for any other trains within the range we're going to move + -- do the checks if we either are moving or about to start moving + if new_index_curr_tv > train.index or accelerating then -- only if train is actually advancing + -- Note: duplicate code from path_project() because of subtle differences: no frac processing and scanning all occupations + --[[train.debug = "" + local atdebug = function(t, ...) + local text=advtrains.print_concat_table({t, ...}) + train.debug = train.debug..text.."\n" + end]] + local base_idx = atfloor(new_index_curr_tv + 1) + local base_pos = advtrains.path_get(train, base_idx) + local base_cn = train.path_cn[base_idx] + --atdebug(id,"Begin Checking for on-track collisions new_idx=",new_index_curr_tv,"base_idx=",base_idx,"base_pos=",base_pos,"base_cn=",base_cn) + -- query occupation + local occ = advtrains.occ.get_trains_over(base_pos) + -- iterate other trains + for otid, ob_idx in pairs(occ) do + if otid ~= id then + --atdebug(id,"Found other train",otid," with matching index ",ob_idx) + -- Phase 1 - determine if trains are facing and which is the relefant stpo index + local otrn = advtrains.trains[otid] + + -- retrieve other train's cn and cp + local ocn = otrn.path_cn[ob_idx] + local ocp = otrn.path_cp[ob_idx] + + local target_is_inside, ref_index, facing + + if base_cn == ocn then + -- same direction + ref_index = otrn.end_index + same_dir = true + target_is_inside = (ob_idx >= ref_index) + --atdebug("Same direction: ref_index",ref_index,"inside=",target_is_inside) + elseif base_cn == ocp then + -- facing trains - subtract index frac + ref_index = otrn.index + same_dir = false + target_is_inside = (ob_idx <= ref_index) + --atdebug("Facing direction: ref_index",ref_index,"inside=",target_is_inside) + end + + -- Phase 2 - project ref_index back onto our path and check again (necessary because there might be a turnout on the way and we are driving into the flank + if target_is_inside then + local our_index = advtrains.path_project(otrn, ref_index, id) + --atdebug("Backprojected our_index",our_index) + if our_index and our_index <= new_index_curr_tv then + -- ON_TRACK COLLISION IS HAPPENING + -- the actual collision is handled in train_step_c, so set appropriate signal variables + train.ontrack_collision_info = { + otid = otid, + same_dir = same_dir, + } + -- clip newindex + --atdebug("-- Collision detected!") + new_index_curr_tv = our_index + end + end + end + end + end + + -- ## Movement happens here ## train.index = new_index_curr_tv recalc_end_index(train) @@ -638,21 +703,39 @@ function advtrains.train_step_c(id, train, dtime) advtrains.spawn_wagons(id) train.check_trainpartload=2 end - - --- 8. check for collisions with other trains and damage players --- - + local train_moves=(train.velocity~=0) - - --- Check whether this train can be coupled to another, and set couple entities accordingly - if not train.was_standing and not train_moves then - advtrains.train_check_couples(train) + + --- On-track collision handling - detected in train_step_b, but handled here so all other train movements have already happened. + if train.ontrack_collision_info then + train.velocity = 0 + train.acceleration = 0 + advtrains.atc.train_reset_command(train) + + local otrn = advtrains.trains[train.ontrack_collision_info.otid] + + if otrn.velocity == 0 then -- other train must be standing, else don't initiate coupling + advtrains.couple_initiate_with(train, otrn, not train.ontrack_collision_info.same_dir) + end + + train.ontrack_collision_info = nil + train.couples_up_to_date = true end - train.was_standing = not train_moves - + + -- handle couples if on_track collision handling did not fire if train_moves then - + train.couples_up_to_date = nil + elseif not train.couples_up_to_date then + advtrains.train_check_couples(train) -- no guarantee for train order here + train.couples_up_to_date = true + end + + --- 8. check for collisions with other trains and damage players --- + if train_moves then + -- Note: this code handles collisions with trains that are not on the same path as the current train + -- The same-track collisions and coupling handling is found in couple.lua and handled from train_step_b() and code 2 blocks above. local collided = false - local coll_grace=1 + local coll_grace=2 local collindex = advtrains.path_get_index_by_offset(train, train.index, -coll_grace) local collpos = advtrains.path_get(train, atround(collindex)) if collpos then @@ -666,8 +749,8 @@ function advtrains.train_step_c(id, train, dtime) local col_tr = advtrains.occ.check_collision(testpos, id) if col_tr then - advtrains.train_check_couples(train) train.velocity = 0 + train.acceleration = 0 advtrains.atc.train_reset_command(train) collided = true end @@ -899,7 +982,7 @@ function advtrains.remove_train(id) run_callbacks_remove(id, train) - advtrains.path_invalidate(train) + advtrains.path_invalidate(train, true) advtrains.couple_invalidate(train) local tp = train.trainparts @@ -1019,53 +1102,6 @@ function advtrains.spawn_wagons(train_id) end end -function advtrains.split_train_at_fc(train, count_empty, length_limit) - -- splits train at first different current FC by convention, - -- locomotives have empty FC so are ignored - -- count_empty is used to split off locomotives - -- length_limit limits the length of the first train to length_limit wagons - local train_id = train.id - local fc = false - local ind = 0 - for i = 1, #train.trainparts do - local w_id = train.trainparts[i] - local data = advtrains.wagons[w_id] - if length_limit and i > length_limit then - ind = i - break - end - if data then - local wfc = advtrains.get_cur_fc(data) - if wfc ~= "" or count_empty then - if fc then - if fc ~= wfc then - ind = i - break - end - else - fc = wfc - end - end - end - end - if ind > 0 then - return advtrains.split_train_at_index(train, ind), fc - end - if fc then - return nil, fc - end -end - -function advtrains.train_step_fc(train) - for i=1,#train.trainparts do - local w_id = train.trainparts[i] - local data = advtrains.wagons[w_id] - if data then - advtrains.step_fc(data) - end - end -end - function advtrains.split_train_at_index(train, index) -- this function splits a train at index, creating a new train from the back part of the train. @@ -1121,167 +1157,6 @@ function advtrains.split_train_at_index(train, index) end -function advtrains.split_train_at_wagon(wagon_id) - --get train - local data = advtrains.wagons[wagon_id] - advtrains.split_train_at_index(advtrains.trains[data.train_id], data.pos_in_trainparts) -end - --- coupling -local CPL_CHK_DST = -1 -local CPL_ZONE = 2 - --- train.couple_* contain references to ObjectRefs of couple objects, which contain all relevant information --- These objectRefs will delete themselves once the couples no longer match -local function createcouple(pos, train1, t1_is_front, train2, t2_is_front) - local id1 = train1.id - local id2 = train2.id - if train1.autocouple or train2.autocouple then - -- couple trains - train1.autocouple = nil - train2.autocouple = nil - minetest.after(0, advtrains.safe_couple_trains, id1, id2, t1_is_front, t2_is_front, false, false, train1.velocity, train2.velocity) - return - end - - local obj=minetest.add_entity(pos, "advtrains:couple") - if not obj then error("Failed creating couple object!") return end - local le=obj:get_luaentity() - le.train_id_1=id1 - le.train_id_2=id2 - le.t1_is_front=t1_is_front - le.t2_is_front=t2_is_front - --atdebug("created couple between",train1.id,t1_is_front,train2.id,t2_is_front) - if t1_is_front then - train1.cpl_front = obj - else - train1.cpl_back = obj - end - if t2_is_front then - train2.cpl_front = obj - else - train2.cpl_back = obj - end - -end - -function advtrains.train_check_couples(train) - --atdebug("rechecking couples") - if train.cpl_front then - if not train.cpl_front:get_yaw() then - -- objectref is no longer valid. reset. - train.cpl_front = nil - end - end - if not train.cpl_front then - -- recheck front couple - local front_trains, pos = advtrains.occ.get_occupations(train, atround(train.index) + CPL_CHK_DST) - if advtrains.is_node_loaded(pos) then -- if the position is loaded... - for tid, idx in pairs(front_trains) do - local other_train = advtrains.trains[tid] - if not advtrains.train_ensure_init(tid, other_train) then - atwarn("Train",tid,"is not initialized! Couldn't check couples!") - return - end - --atdebug(train.id,"front: ",idx,"on",tid,atround(other_train.index),atround(other_train.end_index)) - if other_train.velocity == 0 then - if idx>=other_train.index and idx<=other_train.index + CPL_ZONE then - createcouple(pos, train, true, other_train, true) - break - end - if idx<=other_train.end_index and idx>=other_train.end_index - CPL_ZONE then - createcouple(pos, train, true, other_train, false) - break - end - end - end - end - end - if train.cpl_back then - if not train.cpl_back:get_yaw() then - -- objectref is no longer valid. reset. - train.cpl_back = nil - end - end - if not train.cpl_back then - -- recheck back couple - local back_trains, pos = advtrains.occ.get_occupations(train, atround(train.end_index) - CPL_CHK_DST) - if advtrains.is_node_loaded(pos) then -- if the position is loaded... - for tid, idx in pairs(back_trains) do - local other_train = advtrains.trains[tid] - if not advtrains.train_ensure_init(tid, other_train) then - atwarn("Train",tid,"is not initialized! Couldn't check couples!") - return - end - if other_train.velocity == 0 then - if idx>=other_train.index and idx<=other_train.index + CPL_ZONE then - createcouple(pos, train, false, other_train, true) - break - end - if idx<=other_train.end_index and idx>=other_train.end_index - CPL_ZONE then - createcouple(pos, train, false, other_train, false) - break - end - end - end - end - end -end - -function advtrains.couple_invalidate(train) - if train.cpl_back then - train.cpl_back:remove() - train.cpl_back = nil - end - if train.cpl_front then - train.cpl_front:remove() - train.cpl_front = nil - end - train.was_standing = nil -end - --- relevant code for this comment is in couple.lua - ---there are 4 cases: ---1/2. F<->R F<->R regular, put second train behind first ---->frontpos of first train will match backpos of second ---3. F<->R R<->F flip one of these trains, take the other as new train ---->backpos's will match ---4. R<->F F<->R flip one of these trains and take it as new parent ---->frontpos's will match - - -function advtrains.do_connect_trains(first_id, second_id, vel) - local first, second=advtrains.trains[first_id], advtrains.trains[second_id] - - if not advtrains.train_ensure_init(first_id, first) then - atwarn("Train",first_id,"is not initialized! Operation aborted!") - return - end - if not advtrains.train_ensure_init(second_id, second) then - atwarn("Train",second_id,"is not initialized! Operation aborted!") - return - end - - local first_wagoncnt=#first.trainparts - local second_wagoncnt=#second.trainparts - - for _,v in ipairs(second.trainparts) do - table.insert(first.trainparts, v) - end - - advtrains.remove_train(second_id) - if vel < 0 then - advtrains.invert_train(first_id) - vel = -vel - end - first.velocity= vel or 0 - - advtrains.update_trainpart_properties(first_id) - advtrains.couple_invalidate(first) - return true -end - function advtrains.invert_train(train_id) local train=advtrains.trains[train_id] |