From 842a85606e4495dd631c2916d09a760d74a0ce13 Mon Sep 17 00:00:00 2001
From: orwell96 <orwell@bleipb.de>
Date: Wed, 10 Oct 2018 22:41:59 +0200
Subject: Properly implement invalidate_all_paths, recheck lzb on aspect change

---
 advtrains/occupation.lua | 20 +++++++++++++++++++-
 advtrains/trainlogic.lua | 29 +++++++++++++----------------
 2 files changed, 32 insertions(+), 17 deletions(-)

(limited to 'advtrains')

diff --git a/advtrains/occupation.lua b/advtrains/occupation.lua
index dd0235a..568f308 100644
--- a/advtrains/occupation.lua
+++ b/advtrains/occupation.lua
@@ -208,7 +208,7 @@ function o.get_occupations(train, index)
 	return r, pos
 end
 -- Gets a mapping of train id's to indexes of trains that stand or drive over
--- returns (table with train_id->index), position
+-- returns (table with train_id->index)
 function o.get_trains_at(ppos)
 	local pos = advtrains.round_vector_floor_y(ppos)
 	local t = occget(pos)
@@ -226,4 +226,22 @@ function o.get_trains_at(ppos)
 	return r
 end
 
+-- Gets a mapping of train id's to indexes of trains that have a path
+-- generated over this node
+-- returns (table with train_id->index)
+function o.get_trains_over(ppos)
+	local pos = advtrains.round_vector_floor_y(ppos)
+	local t = occget(pos)
+	if not t then return {} end
+	local r = {}
+	local i = 1
+	while t[i] do
+		local train = advtrains.trains[t[i]]
+		local idx = t[i+1]
+		r[t[i]] = idx
+		i = i + 2
+	end
+	return r
+end
+
 advtrains.occ = o
diff --git a/advtrains/trainlogic.lua b/advtrains/trainlogic.lua
index f26f7da..7147787 100644
--- a/advtrains/trainlogic.lua
+++ b/advtrains/trainlogic.lua
@@ -1037,26 +1037,23 @@ function advtrains.get_train_at_pos(pos)
 	end
 end
 
+
+-- ehm... I never adapted this function to the new path system ?!
 function advtrains.invalidate_all_paths(pos)
-	--if a position is given, only invalidate inside a radius to save performance
-	local inv_radius=50
-	atprint("invalidating all paths")
-	for k,v in pairs(advtrains.trains) do
-		local exec=true
-		if pos and v.path and v.index and v.end_index then
-			--start and end pos of the train
-			local cmp1=v.path[atround(v.index)]
-			local cmp2=v.path[atround(v.end_index)]
-			if vector.distance(pos, cmp1)>inv_radius and vector.distance(pos, cmp2)>inv_radius then
-				exec=false
-			end
-		end
-		if exec then
-			advtrains.invalidate_path(k)
-		end
+	local tab
+	if pos then
+		-- if position given, check occupation system
+		tab = advtrains.occ.get_trains_over(pos)
+	else
+		tab = advtrains.trains
+	end
+	
+	for id, _ in pairs(tab) do
+		advtrains.invalidate_path(id)
 	end
 end
 function advtrains.invalidate_path(id)
+	atdebug("Path invalidate:",id)
 	local v=advtrains.trains[id]
 	if not v then return end
 	advtrains.path_invalidate(v)
-- 
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