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Fix coupling and collisions in certain cases 

If a train moved towards another train, and the other train's step was executed after the first one's, the trains did eventually not collide.
Fix by moving the enter_node and collision check to step_b
Also change some couple behavior
master
orwell96 2017-10-25 10:31:07 +02:00
parent f228e2d30e
commit c67770833b
3 changed files with 100 additions and 86 deletions
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36
advtrains/couple.lua
View File

@ -154,27 +154,33 @@ minetest.register_entity("advtrains:couple", {
return
end
local tp1
if not self.train1_is_backpos then
tp1=advtrains.get_real_index_position(train1.path, train1.index)
else
tp1=advtrains.get_real_index_position(train1.path, train1.end_index)
end
local tp2
if not self.train2_is_backpos then
tp2=advtrains.get_real_index_position(train2.path, train2.index)
else
tp2=advtrains.get_real_index_position(train2.path, train2.end_index)
end
if not tp1 or not tp2 or not (vector.distance(tp1,tp2)<couple_max_dist) then
atprint("Couple: train end positions too distanced, destroying (distance is",vector.distance(tp1,tp2),")")
if train1.velocity>0 or train2.velocity>0 then
if not self.position_set then --ensures that train stands a single time before check fires. Using flag below
return
end
atprint("Couple: train is moving, destroying")
self.object:remove()
return
else
end
if not self.position_set then
local tp1
if not self.train1_is_backpos then
tp1=advtrains.get_real_index_position(train1.path, train1.index)
else
tp1=advtrains.get_real_index_position(train1.path, train1.end_index)
end
local tp2
if not self.train2_is_backpos then
tp2=advtrains.get_real_index_position(train2.path, train2.index)
else
tp2=advtrains.get_real_index_position(train2.path, train2.end_index)
end
local pos_median=advtrains.pos_median(tp1, tp2)
if not vector.equals(pos_median, self.object:getpos()) then
self.object:setpos(pos_median)
end
self.position_set=true
end
atprintbm("couple step", t)
advtrains.atprint_context_tid=nil

2
advtrains/init.lua
View File

@ -105,6 +105,8 @@ if minetest.settings:get_bool("advtrains_enable_debugging") then
if not context then return end
local text=advtrains.print_concat_table({t, ...})
advtrains.drb_record(context, text)
--atlog("@@",advtrains.atprint_context_tid,t,...)
end
atdebug=function(t, ...)
local text=advtrains.print_concat_table({t, ...})

148
advtrains/trainlogic.lua
View File

@ -125,10 +125,11 @@ train step structure:
- environment collision
- update index = move
- create path
- update node coverage
- call stay_node on all old positions to register train there, for collision system
- do less important stuff such as checking trainpartload or removing
-- break --
- Call enter_node and leave_node callbacks (required here because stay_node needs to be called on all trains first)
- handle train collisions
]]
@ -154,7 +155,7 @@ function advtrains.train_step_a(id, train, dtime)
if not train.path then
if not train.last_pos then
--no chance to recover
atprint("train hasn't saved last-pos, removing train.")
atwarn("Unable to restore train ",id,": missing last_pos")
advtrains.trains[id]=nil
return false
end
@ -166,14 +167,14 @@ function advtrains.train_step_a(id, train, dtime)
atprint("last_pos", advtrains.round_vector_floor_y(train.last_pos), "not loaded and not in ndb, waiting")
return nil
elseif node_ok==false then
atprint("no track here, (fail) removing train.")
atwarn("Unable to restore train ",id,": No rail at train's position")
advtrains.trains[id]=nil
return false
end
if not train.last_pos_prev then
--no chance to recover
atprint("train hasn't saved last-pos_prev, removing train.")
atwarn("Unable to restore train ",id,": missing last_pos_prev")
advtrains.trains[id]=nil
return false
end
@ -185,7 +186,7 @@ function advtrains.train_step_a(id, train, dtime)
atprint("last_pos_prev", advtrains.round_vector_floor_y(train.last_pos_prev), "not loaded and not in ndb, waiting")
return nil
elseif prevnode_ok==false then
atprint("no track at prev, (fail) removing train.")
atwarn("Unable to restore train ",id,": No rail at train's position")
advtrains.trains[id]=nil
return false
end
@ -372,7 +373,7 @@ function advtrains.train_step_a(id, train, dtime)
local delete_max=math.max(train.min_index_on_track + offtrack_keep, math.floor(train.index)+gen_front_keep)
if train.path_extent_min<delete_min then
atprint(sid(id),"clearing path min ",train.path_extent_min," to ",delete_min)
--atprint(sid(id),"clearing path min ",train.path_extent_min," to ",delete_min)
for i=train.path_extent_min,delete_min-1 do
train.path[i]=nil
train.path_dist[i]=nil
@ -381,7 +382,7 @@ function advtrains.train_step_a(id, train, dtime)
train.min_index_on_track=math.max(train.min_index_on_track, delete_min)
end
if train.path_extent_max>delete_max then
atprint(sid(id),"clearing path max ",train.path_extent_max," to ",delete_max)
--atprint(sid(id),"clearing path max ",train.path_extent_max," to ",delete_max)
train.path_dist[delete_max]=nil
for i=delete_max+1,train.path_extent_max do
train.path[i]=nil
@ -391,70 +392,16 @@ function advtrains.train_step_a(id, train, dtime)
train.max_index_on_track=math.min(train.max_index_on_track, delete_max)
end
--- 6. update node coverage ---
-- when paths get cleared, the old indices set above will be up-to-date and represent the state in which the last run of this code was made
local ifo, ifn, ibo, ibn = train.detector_old_index, math.floor(train.index), train.detector_old_end_index, math.floor(train.end_index)
--- 6b. call stay_node to register trains in the location table - actual enter_node stuff is done in step b ---
local ifn, ibn = math.floor(train.index), math.floor(train.end_index)
local path=train.path
if train.enter_node_all then
--field set by create_new_train_at.
--ensures that new train calls enter_node on all nodes
for i=ibn, ifn do
if path[i] then
advtrains.detector.enter_node(path[i], id)
end
end
train.enter_node_all=nil
else
for i=ibn, ifn do
if path[i] then
local pts=minetest.pos_to_string(path[i])
if not (advtrains.detector.on_node[pts] and advtrains.detector.on_node[pts]~=id) then
advtrains.detector.stay_node(path[i], id)
end
end
end
if ifn>ifo then
for i=ifo+1, ifn do
if path[i] then
local pts=minetest.pos_to_string(path[i])
if advtrains.detector.on_node[pts] and advtrains.detector.on_node[pts]~=id then
--if another train has signed up for this position first, it won't be recognized in train_step_b. So do collision here.
atprint("Collision detected in enter_node callbacks (front) @",pts,"with",sid(advtrains.detector.on_node[pts]))
advtrains.collide_and_spawn_couple(id, path[i], advtrains.detector.on_node[pts], false)
end
atprint("enter_node (front) @index",i,"@",pts,"on_node",sid(advtrains.detector.on_node[pts]))
advtrains.detector.enter_node(path[i], id)
end
end
elseif ifn<ifo then
for i=ifn+1, ifo do
if path[i] then
advtrains.detector.leave_node(path[i], id)
end
end
end
if ibn<ibo then
for i=ibn, ibo-1 do
if path[i] then
local pts=minetest.pos_to_string(path[i])
if advtrains.detector.on_node[pts] and advtrains.detector.on_node[pts]~=id then
--if another train has signed up for this position first, it won't be recognized in train_step_b. So do collision here.
atprint("Collision detected in enter_node callbacks (back) @",pts,"on_node",sid(advtrains.detector.on_node[pts]))
advtrains.collide_and_spawn_couple(id, path[i], advtrains.detector.on_node[pts], true)
end
atprint("enter_node (back) @index",i,"@",pts,"with",sid(advtrains.detector.on_node[pts]))
advtrains.detector.enter_node(path[i], id)
end
end
elseif ibn>ibo then
for i=ibo, ibn-1 do
if path[i] then
advtrains.detector.leave_node(path[i], id)
end
for i=ibn, ifn do
if path[i] then
local pts=minetest.pos_to_string(path[i])
if not (advtrains.detector.on_node[pts] and advtrains.detector.on_node[pts]~=id) then
advtrains.detector.stay_node(path[i], id)
end
end
end
@ -502,7 +449,7 @@ function advtrains.pathpredict(id, train, regular)
while maxn < gen_front do--pregenerate
local conway
if train.max_index_on_track == maxn then
atprint("maxn conway for ",maxn,train.path[maxn],maxn-1,train.path[maxn-1])
--atprint("maxn conway for ",maxn,train.path[maxn],maxn-1,train.path[maxn-1])
conway=advtrains.conway(train.path[maxn], train.path[maxn-1], train.drives_on)
end
if conway then
@ -523,7 +470,7 @@ function advtrains.pathpredict(id, train, regular)
while minn > gen_back do
local conway
if train.min_index_on_track == minn then
atprint("minn conway for ",minn,train.path[minn],minn+1,train.path[minn+1])
--atprint("minn conway for ",minn,train.path[minn],minn+1,train.path[minn+1])
conway=advtrains.conway(train.path[minn], train.path[minn+1], train.drives_on)
end
if conway then
@ -551,6 +498,65 @@ function advtrains.train_step_b(id, train, dtime)
if not train.end_index then
return
end
--- 6. update node coverage ---
-- when paths get cleared, the old indices set above will be up-to-date and represent the state in which the last run of this code was made
local ifo, ifn, ibo, ibn = train.detector_old_index, math.floor(train.index), train.detector_old_end_index, math.floor(train.end_index)
local path=train.path
if train.enter_node_all then
--field set by create_new_train_at.
--ensures that new train calls enter_node on all nodes
for i=ibn, ifn do
if path[i] then
advtrains.detector.enter_node(path[i], id)
end
end
train.enter_node_all=nil
else
if ifn>ifo then
for i=ifo+1, ifn do
if path[i] then
local pts=minetest.pos_to_string(path[i])
if advtrains.detector.on_node[pts] and advtrains.detector.on_node[pts]~=id then
--if another train has signed up for this position first, it won't be recognized in train_step_b. So do collision here.
atprint("Collision detected in enter_node callbacks (front) @",pts,"with",sid(advtrains.detector.on_node[pts]))
advtrains.collide_and_spawn_couple(id, path[i], advtrains.detector.on_node[pts], false)
end
atprint("enter_node (front) @index",i,"@",pts,"on_node",sid(advtrains.detector.on_node[pts]))
advtrains.detector.enter_node(path[i], id)
end
end
elseif ifn<ifo then
for i=ifn+1, ifo do
if path[i] then
advtrains.detector.leave_node(path[i], id)
end
end
end
if ibn<ibo then
for i=ibn, ibo-1 do
if path[i] then
local pts=minetest.pos_to_string(path[i])
if advtrains.detector.on_node[pts] and advtrains.detector.on_node[pts]~=id then
--if another train has signed up for this position first, it won't be recognized in train_step_b. So do collision here.
atprint("Collision detected in enter_node callbacks (back) @",pts,"on_node",sid(advtrains.detector.on_node[pts]))
advtrains.collide_and_spawn_couple(id, path[i], advtrains.detector.on_node[pts], true)
end
atprint("enter_node (back) @index",i,"@",pts,"with",sid(advtrains.detector.on_node[pts]))
advtrains.detector.enter_node(path[i], id)
end
end
elseif ibn>ibo then
for i=ibo, ibn-1 do
if path[i] then
advtrains.detector.leave_node(path[i], id)
end
end
end
end
--- 8. check for collisions with other trains and damage players ---
@ -695,7 +701,7 @@ function advtrains.update_trainpart_properties(train_id, invert_flipstate)
end
else
atprint(w_id.." not loaded and no save available")
atwarn("Did not find save data for wagon",w_id,". The wagon will be deleted.")
--what the hell...
table.remove(train.trainparts, pit)
end