From 080b8fb27342827965bab2567dde14e57433b55e Mon Sep 17 00:00:00 2001
From: orwell96 <orwell@bleipb.de>
Date: Sun, 27 Dec 2020 18:04:42 +0100
Subject: Add IGNORE_WORLD mode to test using only the advtrains save data

---
 advtrains/init.lua   | 35 ++++++++++++++++++++++++++++++-----
 advtrains/nodedb.lua |  4 +++-
 advtrains/tracks.lua |  2 +-
 advtrains/wagons.lua |  4 +++-
 4 files changed, 37 insertions(+), 8 deletions(-)

(limited to 'advtrains')

diff --git a/advtrains/init.lua b/advtrains/init.lua
index fd56d6d..d21a887 100644
--- a/advtrains/init.lua
+++ b/advtrains/init.lua
@@ -26,17 +26,33 @@ minetest.log("action", "[advtrains] Loading...")
 attrans = minetest.get_translator ("advtrains")
 
 --advtrains
+advtrains = {trains={}, player_to_train_mapping={}}
 
+-- =======================Development/debugging settings=====================
+-- DO NOT USE FOR NORMAL OPERATION
 local DUMP_DEBUG_SAVE = false
+-- dump the save files in human-readable format into advtrains_DUMP
+
 local GENERATE_ATRICIFIAL_LAG = false
 local HOW_MANY_LAG = 1.0
+-- Simulate a higher server step interval, as it occurs when the server is on high load
+
+advtrains.IGNORE_WORLD = false
+-- Run advtrains without respecting the world map
+-- - No world collision checks occur
+-- - The NDB forcibly places all nodes stored in it into the world regardless of the world's content.
+-- - Rails do not set the 'attached_node' group
+-- This mode can be useful for debugging/testing a world without the map data available
+-- In this case, choose 'singlenode' as mapgen
+
+local NO_SAVE = false
+-- Do not save any data to advtrains save files
+-- ==========================================================================
 
 
 --Constant for maximum connection value/division of the circle
 AT_CMAX = 16
 
-advtrains = {trains={}, player_to_train_mapping={}}
-
 -- get wagon loading range
 advtrains.wagon_load_range = tonumber(minetest.settings:get("advtrains_wagon_load_range"))
 if not advtrains.wagon_load_range then
@@ -622,6 +638,18 @@ function advtrains.save(remove_players_from_wagons)
 		atwarn("Instructed to save() but load() was never called!")
 		return
 	end
+	
+	-- Cleanup actions
+	--TODO very simple yet hacky workaround for the "green signals" bug
+	advtrains.invalidate_all_paths()
+	
+	if advtrains.IGNORE_WORLD then
+		advtrains.ndb.restore_all()
+	end
+	
+	if NO_SAVE then
+		return
+	end
 	if no_action then
 		atlog("[save] Saving requested externally, but Advtrains step is disabled. Not saving any data as state may be inconsistent.")
 		return
@@ -632,9 +660,6 @@ function advtrains.save(remove_players_from_wagons)
 		atlatc.save()
 	end
 	atprint("[save_all]Saved advtrains save files")
-	
-	--TODO very simple yet hacky workaround for the "green signals" bug
-	advtrains.invalidate_all_paths()
 end
 minetest.register_on_shutdown(advtrains.save)
 
diff --git a/advtrains/nodedb.lua b/advtrains/nodedb.lua
index 4539529..ca7b195 100644
--- a/advtrains/nodedb.lua
+++ b/advtrains/nodedb.lua
@@ -281,6 +281,8 @@ function advtrains.get_rail_info_at(pos, drives_on)
 	return true, conns, railheight
 end
 
+local IGNORE_WORLD = advtrains.IGNORE_WORLD
+
 ndb.run_lbm = function(pos, node)
 		local cid=ndbget(pos.x, pos.y, pos.z)
 		if cid then
@@ -335,7 +337,7 @@ ndb.restore_all = function()
 				if node then
 					local ori_ndef=minetest.registered_nodes[node.name]
 					local ndbnode=ndb.get_node_raw(pos)
-					if ori_ndef and ori_ndef.groups.save_in_at_nodedb then --check if this node has been worldedited, and don't replace then
+					if (ori_ndef and ori_ndef.groups.save_in_at_nodedb) or IGNORE_WORLD then --check if this node has been worldedited, and don't replace then
 						if (ndbnode.name~=node.name or ndbnode.param2~=node.param2) then
 							minetest.swap_node(pos, ndbnode)
 							--atlog("Replaced",node.name,"@",pos,"with",ndbnode.name)
diff --git a/advtrains/tracks.lua b/advtrains/tracks.lua
index 7037244..ba59720 100644
--- a/advtrains/tracks.lua
+++ b/advtrains/tracks.lua
@@ -469,7 +469,7 @@ function advtrains.register_tracks(tracktype, def, preset)
 					tiles = {def.shared_texture or (def.texture_prefix.."_"..img_suffix..".png"), def.second_texture},
 					
 					groups = {
-						attached_node=1,
+						attached_node = advtrains.IGNORE_WORLD and 0 or 1,
 						advtrains_track=1,
 						["advtrains_track_"..tracktype]=1,
 						save_in_at_nodedb=1,
diff --git a/advtrains/wagons.lua b/advtrains/wagons.lua
index 4e7fb26..7b6a381 100644
--- a/advtrains/wagons.lua
+++ b/advtrains/wagons.lua
@@ -10,6 +10,8 @@
 -- TP delay when getting off wagon
 local GETOFF_TP_DELAY = 0.5
 
+local IGNORE_WORLD = advtrains.IGNORE_WORLD
+
 advtrains.wagons = {}
 advtrains.wagon_prototypes = {}
 advtrains.wagon_objects = {}
@@ -446,7 +448,7 @@ function wagon:on_step(dtime)
 		end
 		
 		--checking for environment collisions(a 3x3 cube around the center)
-		if is_in_loaded_area and not train.recently_collided_with_env then
+		if not IGNORE_WORLD and is_in_loaded_area and not train.recently_collided_with_env then
 			local collides=false
 			local exh = self.extent_h or 1
 			local exv = self.extent_v or 2
-- 
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