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<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<el:level xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://enigma-game.org/schema/level/1 level.xsd" xmlns:el="http://enigma-game.org/schema/level/1">
<el:protected>
<el:info el:type="library">
<el:identity el:title="" el:id="lib/libtrain"/>
<el:version el:score="1" el:release="1" el:revision="1" el:status="released"/>
<el:author el:name="Ronald Lamprecht" el:email="" el:homepage=""/>
<el:copyright>Copyright © 2009 Ronald Lamprecht</el:copyright>
<el:license el:type="GPL v2.0 or above" el:open="true"/>
<el:compatibility el:enigma="1.10">
<el:dependency el:path="lib/liblua" el:id="lib/liblua" el:release="1" el:preload="true"/>
</el:compatibility>
<el:modes el:easy="false" el:single="false" el:network="false"/>
<el:comments/>
<el:score el:easy="-" el:difficult="-"/>
</el:info>
<el:luamain><![CDATA[
res.train_railways = {}
function res.train(subresolver, ...)
-- syntax: ... = <prefixkey>
assert_bool(is_resolver(subresolver), "res.train first argument (subresolver)", 2)
local args = {...}
local context = {res.train_implementation, res.train_finalization, subresolver}
context.newori = {[WEST]={WEST, NORTH, SOUTH}, [SOUTH]={SOUTH, WEST, EAST},
[EAST]={EAST, SOUTH, NORTH}, [NORTH]={NORTH, EAST, WEST}}
context.suffix = nil
context.suffix_init = false
context.hits = args
context.edges = {}
context.track = {}
context.trains = {}
context.railway = 0
context.subresolver = subresolver
for i, v in ipairs(args) do
assert_type(v, "res.train argument "..i+1, 2, "string", "table")
if i > 1 and type(args[i]) == "string" then
context.hits[i] = {args[i]}
end
end
if type(args[1]) == "table" then
context.suffix_init = true
else
context.suffix = args[1]
end
setmetatable(context, res.metatable)
table.insert(res.train_railways, context)
context.railway = #res.train_railways
return context
end
function res.train_implementation(context, evaluator, key, x, y)
if not context.suffix_init then
if #(context.suffix) >= #key then
context.suffix = nil
context.hits[1] = {context.hits[1]}
else -- now we are sure we have a suffix as argument 2
table.remove(context.hits, 1)
end
context.suffix_init = true
end
local replacement = nil
for i, hit in ipairs(context.hits) do
if hit[1] == key then
-- print("train: direct hit '"..key.."'")
replacement = hit[2] or ""
if hit["edge"] == true then
table.insert(context.edges, po(x,y))
else
table.insert(context.track, po(x,y))
end
if hit["train"] ~= nil then
local newtrain = lib.lua.deep_copy(hit["train"])
newtrain["pos"] = po(x, y)
if newtrain["interval"] == nil then
newtrain.interval=0.25
end
table.insert(context.trains, newtrain)
newtrain.index = #context.trains
newtrain.railway = context.railway
newtrain.tick = res.train_usertick
end
break
end
end
if replacement == nil and context.suffix ~= nil and
key:find(context.suffix, -#context.suffix, true) ~= nil then
-- print("train: suffix found")
replacement = key:sub(1, -1 - #context.suffix) .. string.rep(" ", #context.suffix)
-- print("train: suffix replacement '"..replacement.."'")
table.insert(context.track, po(x,y))
end
if replacement == nil then
return evaluator(context[3], key, x, y)
else
return cond(replacement ~= "", evaluator(context[3], replacement, x, y), {"nil"})
end
end
function res.train_finalization(context)
assert_bool(#context.edges == 0 or #context.edges == 2, "libtrain: illegal number of track edges:" .. #context.edges)
if #context.edges == 2 then
local minx = math.min(context.edges[1].x, context.edges[2].x)
local maxx = math.max(context.edges[1].x, context.edges[2].x)
local miny = math.min(context.edges[1].y, context.edges[2].y)
local maxy = math.max(context.edges[1].y, context.edges[2].y)
assert_bool(minx ~= maxx, "libtrain error: both edges in same column")
assert_bool(miny ~= maxy, "libtrain error: both edges in same row")
table.insert(context.track, po(minx+1, miny))
table.insert(context.track, po(maxx-1, miny))
table.insert(context.track, po(maxx, miny+1))
table.insert(context.track, po(maxx, maxy-1))
table.insert(context.track, po(maxx-1, maxy))
table.insert(context.track, po(minx+1, maxy))
table.insert(context.track, po(minx, maxy-1))
table.insert(context.track, po(minx, miny+1))
end
local tracklength = 0
local train = lib.lua.deep_copy(context.trains[1])
local trainlength = 0
local startpos = train.pos
local positions = nil
repeat
res.train_move(context, train)
if positions == nil then
positions = train["pos"]
else
positions = positions .. train["pos"]
end
tracklength = tracklength + 1
trainlength = trainlength + 1
if train.length == trainlength then
local loco = lib.lua.deep_copy(train)
loco[1], loco[2] = loco[2], loco[1]
loco.length = nil
table.insert(context.trains, loco)
loco.index = #context.trains
loco.railway = context.railway
loco.tick = res.train_usertick
if type(loco.name) == "string" then
loco.name = loco.name .. "_front"
end
end
for i, tr in ipairs(context.trains) do
if tr.pos == train.pos then
for i = 1, #positions do
local pos = positions[i]
wo[pos] = wo:_evaluate(context.subresolver, tr[1], pos.x, pos.y)
end
train = lib.lua.deep_copy(tr)
trainlength = 0
positions = nil
break
end
end
until train.pos == startpos or tracklength > 2000
for i, tr in ipairs(context.trains) do
wo:add({"ot_timer", "res.train.timer", target="res.train_tick", interval=tr.interval, _railway=context.railway, _train=tr.index})
tr.timer = no["res.train.timer"]
end
return
end
function res.train_move(context, train)
for i=1,3 do
local neworientation = (context.newori[train.orientation])[i]
local newpos = train["pos"] + ORI2DIR[neworientation]
if newpos:exists() then
for j, trackpos in ipairs(context.track) do
if trackpos == newpos then
train["pos"] = newpos
train.orientation = neworientation
return
end
end
end
end
train["pos"] = train["pos"] + ORI2DIR[train.orientation]
end
function res.train_tick(value, sender)
local context = res.train_railways[sender._railway]
local train = context.trains[sender._train]
res.train_move(context, train)
wo[train.pos] = wo:_evaluate(context.subresolver, train[1], train.pos.x, train.pos.y)
end
function res.train_usertick(train)
local context = res.train_railways[train.railway]
res.train_move(context, train)
wo[train.pos] = wo:_evaluate(context.subresolver, train[1], train.pos.x, train.pos.y)
end
]]></el:luamain>
<el:i18n>
</el:i18n>
</el:protected>
</el:level>
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