3 files changed, 150 insertions, 0 deletions

diff --git a/advtrains_itrainmap/depends.txt b/advtrains_itrainmap/depends.txt
new file mode 100644
index 0000000..6f00bf6
--- /dev/null
+++ b/advtrains_itrainmap/depends.txt
@@ -0,0 +1 @@
+advtrains
\ No newline at end of file
diff --git a/advtrains_itrainmap/init.lua b/advtrains_itrainmap/init.lua
new file mode 100644
index 0000000..756f1da
--- /dev/null
+++ b/advtrains_itrainmap/init.lua
@@ -0,0 +1,149 @@
+
+
+local map_def={
+	example = {
+		p1x=168,
+		p1z=530,
+		p2x=780,
+		p2z=1016,
+		background="itm_example.png",
+	},
+}
+
+local itm_cache={}
+local itm_pdata={}
+local itm_conf_mindia=0.1
+
+minetest.register_privilege("itm", { description = "Allows to display train map", give_to_singleplayer = true, default = false })
+
+local function create_map_form_with_bg(d)
+	local minx, minz, maxx, maxz = math.min(d.p1x, d.p2x), math.min(d.p1z, d.p2z), math.max(d.p1x, d.p2x), math.max(d.p1z, d.p2z)
+	local form_x, form_z=10,10
+	local edge_x, edge_z = form_x/(maxx-minx), form_z/(maxz-minz)
+	local len_x, len_z=math.max(edge_x, itm_conf_mindia), math.max(edge_z, itm_conf_mindia)
+	local form="size["..(form_x+edge_x)..","..(form_z+edge_z).."] background[0,0;0,0;"..d.background..";true] "
+	local lbl={}
+	
+	for pts, tid in pairs(advtrains.detector.on_node) do
+		local pos=minetest.string_to_pos(pts)
+		form=form.."box["..(edge_x*(pos.x-minx))..","..(form_z-(edge_z*(pos.z-minz)))..";"..len_x..","..len_z..";red]"
+		lbl[sid(tid)]=pos
+	end
+	
+	for t_id, xz in pairs(lbl) do
+		form=form.."label["..(edge_x*(xz.x-minx))..","..(form_x-(edge_z*(xz.z-minz)))..";"..t_id.."]"
+	end
+	return form
+end
+
+local function create_map_form(d)
+	if d.background then
+		return create_map_form_with_bg(d)
+	end
+	
+	local minx, minz, maxx, maxz = math.min(d.p1x, d.p2x), math.min(d.p1z, d.p2z), math.max(d.p1x, d.p2x), math.max(d.p1z, d.p2z)
+	local form_x, form_z=10,10
+	local edge_x, edge_z = form_x/(maxx-minx), form_z/(maxz-minz)
+	local len_x, len_z=math.max(edge_x, itm_conf_mindia), math.max(edge_z, itm_conf_mindia)
+	local form="size["..(form_x+edge_x)..","..(form_z+edge_z).."]"
+	local lbl={}
+	
+	for x,itx in pairs(itm_cache) do
+		if x>=minx and x<=maxx then
+			for z,y in pairs(itx) do
+				if z>=minz and z<=maxz then
+					local adn=advtrains.detector.on_node[minetest.pos_to_string({x=x, y=y, z=z})]
+					local color="gray"
+					if adn then
+						color="red"
+						lbl[sid(adn)]={x=x, z=z}
+					end
+					form=form.."box["..(edge_x*(x-minx))..","..(form_z-(edge_z*(z-minz)))..";"..len_x..","..len_z..";"..color.."]"
+				end
+			end
+		end
+	end
+	for t_id, xz in pairs(lbl) do
+		form=form.."label["..(edge_x*(xz.x-minx))..","..(form_x-(edge_z*(xz.z-minz)))..";"..t_id.."]"
+	end
+	return form
+end
+
+local function cache_ndb()
+	itm_cache={}
+	local ndb_nodes=advtrains.ndb.get_nodes()
+	for y, xzt in pairs(ndb_nodes) do
+		for x, zt in pairs(xzt) do
+			for z, _ in pairs(zt) do
+				if not itm_cache[x] then
+					itm_cache[x]={}
+				end
+				itm_cache[x][z]=y
+			end
+		end
+	end
+end
+
+minetest.register_chatcommand("itm", {
+	params="[x1 z1 x2 z2] or [mdef]",
+	description="Display advtrains train map of given area.\nFirst form:[x1 z1 x2 z2] - specify area directly.\nSecond form:[mdef] - Use a predefined map background(see init.lua)\nThird form: No parameters - use WorldEdit position markers.",
+	privs={itm=true},
+	func = function(name, param)
+		local mdef=string.match(param, "^(%S+)$")
+		if mdef then
+			local d=map_def[mdef]
+			if not d then
+				return false, "Map definiton not found: "..mdef
+			end
+			itm_pdata[name]=map_def[mdef]
+			minetest.show_formspec(name, "itrainmap", create_map_form(d))
+			return true, "Showing train map: "..mdef
+		end
+		local x1, z1, x2, z2=string.match(param, "^(%S+) (%S+) (%S+) (%S+)$")
+		if not (x1 and z1 and x2 and z2) then
+			if worldedit then
+				local wep1, wep2=worldedit.pos1[name], worldedit.pos2[name]
+				if wep1 and wep2 then
+					x1, z1, x2, z2=wep1.x, wep1.z, wep2.x, wep2.z
+				end
+			end
+		end
+		if not (x1 and z1 and x2 and z2) then
+			return false, "Invalid parameters and no WE positions set"
+		end
+		local d={p1x=x1, p1z=z1, p2x=x2, p2z=z2}
+		itm_pdata[name]=d
+		minetest.show_formspec(name, "itrainmap", create_map_form(d))
+		return true, "Showing ("..x1..","..z1..")-("..x2..","..z2..")"
+	end,
+})
+minetest.register_chatcommand("itm_cache_ndb", {
+	params="",
+	description="Cache advtrains node database again. Run when tracks changed.",
+	privs={itm=true},
+	func = function(name, param)
+		cache_ndb()
+		return true, "Done caching node database."
+	end,
+})
+
+local timer=0
+function advtrains_itm_mainloop(dtime)
+	timer=timer-math.min(dtime, 0.1)
+	if timer<=0 then
+		for pname,d in pairs(itm_pdata) do
+			minetest.show_formspec(pname, "itrainmap", create_map_form(d))
+		end
+		timer=2
+	end
+end
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+	if formname=="itrainmap" and fields.quit then
+		itm_pdata[player:get_player_name()]=nil
+	end
+end)
+
+function advtrains_itm_init()
+	--automatically run itm_cache_ndb
+	minetest.after(2, cache_ndb)
+end
diff --git a/advtrains_itrainmap/textures/itm_example.png b/advtrains_itrainmap/textures/itm_example.png
new file mode 100644
index 0000000..caf084a
--- /dev/null
+++ b/advtrains_itrainmap/textures/itm_example.png