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------------------------------------------------------------------------------
-- lm_timed.lua:
-- Lua timed map feature markers.
------------------------------------------------------------------------------
dofile('clua/lm_tmsg.lua')
TimedMarker = { }
TimedMarker.__index = TimedMarker
function TimedMarker._new()
local marker = { }
setmetatable(marker, TimedMarker)
return marker
end
function TimedMarker.new(pars)
pars = pars or { }
if not pars.msg then
error("No messaging object provided (msg = nil)")
end
pars.high = pars.high or pars.low or pars.turns or 1
pars.low = pars.low or pars.high or pars.turns or 1
local dur = crawl.random_range(pars.low, pars.high, pars.navg or 1)
local feat = pars.feat or 'floor'
local fnum = dgn.feature_number(feat)
if fnum == dgn.feature_number('unseen') then
error("Bad feature name: " .. feat)
end
local tmarker = TimedMarker._new()
tmarker.dur = dur * 10
tmarker.fnum = fnum
tmarker.feat = feat
tmarker.msg = pars.msg
return tmarker
end
function TimedMarker:activate(marker)
self.msg:init(self, marker)
dgn.register_listener(dgn.dgn_event_type('turn'), marker)
dgn.register_listener(dgn.dgn_event_type('player_climb'),
marker, marker:pos())
end
function TimedMarker:timeout(marker, verbose, affect_player)
local x, y = marker:pos()
if verbose then
if you.see_grid(marker:pos()) then
crawl.mpr(dgn.feature_desc(dgn.grid(x, y), "The") ..
" disappears!")
else
crawl.mpr("The walls and floor vibrate strangely for a moment.")
end
end
dgn.terrain_changed(x, y, self.fnum, affect_player)
dgn.remove_listener(marker)
dgn.remove_listener(marker, marker:pos())
dgn.remove_marker(marker)
end
function TimedMarker:event(marker, ev)
self.ticktype = self.ticktype or dgn.dgn_event_type('turn')
self.stairtype = self.stairtype or dgn.dgn_event_type('player_climb')
if ev:type() == self.stairtype then
local mx, my = marker:pos()
local ex, ey = ev:pos()
if mx == ex and my == ey then
self:timeout(marker, false, false)
end
return
end
if ev:type() ~= self.ticktype then
return
end
self.dur = self.dur - ev:ticks()
self.msg:event(self, marker, ev)
if self.dur <= 0 then
self:timeout(marker, true, true)
end
end
function TimedMarker:describe(marker)
return self.feat .. "/" .. tostring(self.dur)
end
function TimedMarker.read(marker, th)
local marker = TimedMarker._new()
marker.dur = file.unmarshall_number(th)
marker.fnum = file.unmarshall_number(th)
marker.feat = file.unmarshall_string(th)
marker.msg = file.unmarshall_fn(th)(th)
return marker
end
function TimedMarker:write(marker, th)
file.marshall(th, self.dur)
file.marshall(th, self.fnum)
file.marshall(th, self.feat)
file.marshall(th, self.msg.read)
self.msg:write(th)
end
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