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generated by cgit v1.2.3 (git 2.39.1) at 2025-02-15 01:17:32 +0000
an>name].max_speed=max_speed or 10 end advtrains.trains={} advtrains.wagon_save={} --load initially advtrains.fpath=minetest.get_worldpath().."/advtrains" local file, err = io.open(advtrains.fpath, "r") if not file then local er=err or "Unknown Error" print("[advtrains]Failed loading advtrains save file "..er) else local tbl = minetest.deserialize(file:read("*a")) if type(tbl) == "table" then advtrains.trains=tbl end file:close() end advtrains.fpath_ws=minetest.get_worldpath().."/advtrains_wagon_save" local file, err = io.open(advtrains.fpath_ws, "r") if not file then local er=err or "Unknown Error" print("[advtrains]Failed loading advtrains save file "..er) else local tbl = minetest.deserialize(file:read("*a")) if type(tbl) == "table" then advtrains.wagon_save=tbl end file:close() end advtrains.save = function() --print("[advtrains]saving") advtrains.invalidate_all_paths() local datastr = minetest.serialize(advtrains.trains) if not datastr then minetest.log("error", "[advtrains] Failed to serialize train data!") return end local file, err = io.open(advtrains.fpath, "w") if err then return err end file:write(datastr) file:close() -- update wagon saves for _,wagon in pairs(minetest.luaentities) do if wagon.is_wagon and wagon.initialized then wagon:get_staticdata() end end --cross out userdata for w_id, data in pairs(advtrains.wagon_save) do data.name=nil data.object=nil if data.driver then data.driver_name=data.driver:get_player_name() data.driver=nil else data.driver_name=nil end if data.discouple then data.discouple.object:remove() data.discouple=nil end end --print(dump(advtrains.wagon_save)) datastr = minetest.serialize(advtrains.wagon_save) if not datastr then minetest.log("error", "[advtrains] Failed to serialize train data!") return end file, err = io.open(advtrains.fpath_ws, "w") if err then return err end file:write(datastr) file:close() advtrains.save_trackdb() end minetest.register_on_shutdown(advtrains.save) advtrains.save_and_audit_timer=advtrains.audit_interval minetest.register_globalstep(function(dtime) advtrains.save_and_audit_timer=advtrains.save_and_audit_timer-dtime if advtrains.save_and_audit_timer<=0 then local t=os.clock() --print("[advtrains] audit step") --clean up orphaned trains for k,v in pairs(advtrains.trains) do --advtrains.update_trainpart_properties(k) if #v.trainparts==0 then print("[advtrains][train "..k.."] has empty trainparts, removing.") advtrains.trains[k]=nil end end --save advtrains.save() advtrains.save_and_audit_timer=advtrains.audit_interval printbm("saving", t) end --regular train step local t=os.clock() for k,v in pairs(advtrains.trains) do advtrains.train_step(k, v, dtime) end printbm("trainsteps", t) endstep() end) function advtrains.train_step(id, train, dtime) --TODO check for all vars to be present if not train.velocity then train.velocity=0 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 --skip certain things (esp. collision) when not moving local train_moves=(train.velocity~=0) --if not train.last_pos then advtrains.trains[id]=nil return end if not advtrains.pathpredict(id, train) then print("pathpredict failed(returned false)") train.velocity=0 train.tarvelocity=0 return end local path=advtrains.get_or_create_path(id, train) if not path then train.velocity=0 train.tarvelocity=0 print("train has no path for whatever reason") return end local train_end_index=advtrains.get_train_end_index(train) --apply off-track handling: local front_off_track=train.max_index_on_track and train.index>train.max_index_on_track 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 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 end if train_moves then --check for collisions by finding objects --front local search_radius=4 --coupling local couple_outward=1 local posfront=advtrains.get_real_index_position(path, train.index+couple_outward) local posback=advtrains.get_real_index_position(path, train_end_index-couple_outward) for _,pos in ipairs({posfront, posback}) do if pos then local objrefs=minetest.get_objects_inside_radius(pos, search_radius) for _,v in pairs(objrefs) do local le=v:get_luaentity() if le and le.is_wagon and le.initialized and le.train_id~=id then advtrains.try_connect_trains(id, le.train_id) end end end end --new train collisions (only search in the direction of the driving train) local coll_search_radius=2 local coll_grace=0 local collpos if train.velocity>0 then collpos=advtrains.get_real_index_position(path, train.index-coll_grace) elseif train.velocity<0 then collpos=advtrains.get_real_index_position(path, train_end_index+coll_grace) end if collpos then local objrefs=minetest.get_objects_inside_radius(collpos, coll_search_radius) for _,v in pairs(objrefs) do local le=v:get_luaentity() if le and le.is_wagon and le.initialized and le.train_id~=id then train.recently_collided_with_env=true train.velocity=-0.5*train.velocity train.tarvelocity=0 end end end end --check for any trainpart entities if they have been unloaded. do this only if train is near a player, to not spawn entities into unloaded areas train.check_trainpartload=(train.check_trainpartload or 0)-dtime local node_range=(math.max((minetest.setting_get("active_block_range") or 0),1)*16) if train.check_trainpartload<=0 then local ori_pos=advtrains.get_real_index_position(path, train.index) --not much to calculate print("[advtrains][train "..id.."] at "..minetest.pos_to_string(vector.round(ori_pos))) local should_check=false for _,p in ipairs(minetest.get_connected_players()) do should_check=should_check or ((vector.distance(ori_pos, p:getpos())<node_range)) end if should_check then --it is better to iterate luaentites only once --print("check_trainpartload") local found_uids={} for _,wagon in pairs(minetest.luaentities) do if wagon.is_wagon and wagon.initialized and wagon.train_id==id then if found_uids[wagon.unique_id] then --duplicate found, delete it if wagon.object then wagon.object:remove() end else found_uids[wagon.unique_id]=true end end end --print("found_uids: "..dump(found_uids)) --now iterate trainparts and check. then cross them out to see if there are wagons over for any reason for pit, w_id in ipairs(train.trainparts) do if found_uids[w_id] then --print(w_id.." still loaded") elseif advtrains.wagon_save[w_id] then --print(w_id.." not loaded, but save available") --spawn a new and initialize it with the properties from wagon_save local le=minetest.env:add_entity(ori_pos, advtrains.wagon_save[w_id].entity_name):get_luaentity() le:init_from_wagon_save(w_id) else print(w_id.." not loaded and no save available") --what the hell... table.remove(train.trainparts, pit) end end end train.check_trainpartload=2 end --handle collided_with_env if train.recently_collided_with_env then train.tarvelocity=0 if not train_moves then train.recently_collided_with_env=false--reset status when stopped end end if train.locomotives_in_train==0 then train.tarvelocity=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) 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 --print("braking with default force") applydiff=(math.min((advtrains.train_brake_force*dtime), math.abs(diff))) end end train.last_accel=(applydiff*math.sign(train.tarvelocity-train.velocity)) train.velocity=train.velocity+train.last_accel 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 end --structure of train table: --[[ trains={ [train_id]={ trainparts={ [n]=wagon_id } path={path} velocity tarvelocity index trainlen path_inv_level last_pos | last_dir | for pathpredicting. } } --a wagon itself has the following properties: wagon={ unique_id train_id pos_in_train (is index difference, including train_span stuff)