1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
|
------------------------------------------------------------------------------
-- lm_tmsg.lua:
-- Fog machines.
--
-- There are three different "pure" ways to use a fog machine marker:
--
-- 1) Repeatedly lay down medium to large clouds on top of the marker
-- and let them pile up on one another. (One of the cloud grids in
-- the first laid cloud has to decay away before this is this really
-- starts working.
--
-- 2) Perform random walks from the marker and place a single-grid cloud
-- at the destination of each walk.
--
-- 3) Place a single-grid cloud on the marker and let it spread out.
--
-- Combining these different methods, along with varying the different
-- parameters, can be used to achieve different effects.
--
-- Marker parameters:
--
-- cloud_type: The name of the cloud type to use. Possible cloud types are:
-- flame, noxious fumes, freezing vapour, poison gases,
-- grey smoke, blue smoke, purple smoke, steam,
-- foul pestilence, black smoke, mutagenic fog, thin mist (the default).
-- walk_dist: The distance to move over the course of one random walk.
-- defaults to 0.
-- pow_min: The minimum "power" (lifetime) of each cloud; defaults to 1.
-- pow_max: The maximum power of each cloud; must be provided.
-- pow_rolls: The number of rolls of [pow_min, pow_max], with the average
-- value uses; increasing the values makes the average value more likely
-- and extreme values less likely. Defaults to 1.
-- delay, delay_min and delay_max: The delay between laying down one cloud
-- and the next. 10 is equal to normal-speed player turn. Either
-- delay or delay_max and delay_min must be provided. Providing just
-- "delay" is equivalent to delay_min and delay_max being equal.
-- size, size_min and size_max: The number of grids each cloud will cover.
-- Either size or size_max and size_min must be provided. Providing
-- just "size" is equivalent to size_min and size_max being equal.
-- size_buildup_amnt, size_buildup_time: Increase the cloud size over time.
-- Adds (size_buildup_amnt / size_buildup_time * turns_since_made)
-- to size_min and size_max, maxing out at size_buildup_amnt.
-- spread_rate: The rate at which a cloud spreads. Must either be
-- -1 (default spread rate that varies by cloud type) or between
-- 0 and 100 inclusive.
-- spread_rate_amnt, spread_rate_buildup: Similar to size_buildup_amnt
-- and size_buildup_time
-- start_clouds: The number of clouds to lay when the level containing
-- the cloud machine is entered. This is necessary since clouds
-- are cleared when the player leaves a level.
------------------------------------------------------------------------------
FogMachine = { CLASS = "FogMachine" }
FogMachine.__index = FogMachine
function FogMachine:_new()
local m = { }
setmetatable(m, self)
self.__index = self
return m
end
function FogMachine:new(pars)
if not pars then
error("No parameters provided")
end
if not pars.pow_max then
error("No pow_max provided.")
end
if not (pars.delay or (pars.delay_min and pars.delay_max)) then
error("Delay parameters not provided.")
end
if not (pars.size or (pars.size_min and pars.size_max)) then
error("Size parameters not provided.")
end
local m = FogMachine:_new()
m.cloud_type = pars.cloud_type or "thin mist"
m.walk_dist = pars.walk_dist or 0
m.pow_min = pars.pow_min or 1
m.pow_max = pars.pow_max
m.pow_rolls = pars.pow_rolls or 3
m.delay_min = pars.delay_min or pars.delay or 1
m.delay_max = pars.delay_max or pars.delay
m.kill_cat = pars.kill_cat or "other"
m.size_min = pars.size_min or pars.size or 1
m.size_max = pars.size_max or pars.size
m.spread_rate = pars.spread_rate or -1
m.start_clouds = pars.start_clouds or 1
m.size_buildup_amnt = pars.size_buildup_amnt or 0
m.size_buildup_time = pars.size_buildup_time or 1
m.spread_buildup_amnt = pars.spread_buildup_amnt or 0
m.spread_buildup_time = pars.spread_buildup_time or 1
m.buildup_turns = 0
m.countdown = 0
return m
end
function FogMachine:do_fog(marker)
local x, y = marker:pos()
if self.walk_dist > 0 then
x, y = dgn.random_walk(x, y, self.walk_dist)
end
local buildup_turns = self.buildup_turns
-- Size buildup
if buildup_turns > self.size_buildup_time then
buildup_turns = self.size_buildup_time
end
local size_buildup = self.size_buildup_amnt * buildup_turns /
self.size_buildup_time
local size_min = self.size_min + size_buildup
local size_max = self.size_max + size_buildup
if (size_min < 0) then
size_min = 0
end
-- Spread buildup
buildup_turns = self.buildup_turns
if buildup_turns > self.spread_buildup_time then
buildup_turns = self.spread_buildup_time
end
local spread = self.spread_rate + (self.spread_buildup_amnt * buildup_turns /
self.spread_buildup_time)
dgn.apply_area_cloud(x, y, self.pow_min, self.pow_max, self.pow_rolls,
crawl.random_range(size_min, size_max, 1),
self.cloud_type, self.kill_cat, spread)
end
function FogMachine:activate(marker, verbose)
local _x, _y = marker:pos()
dgn.register_listener(dgn.dgn_event_type('turn'), marker)
dgn.register_listener(dgn.dgn_event_type('entered_level'), marker)
end
function FogMachine:event(marker, ev)
local _x, _y = marker:pos()
if ev:type() == dgn.dgn_event_type('turn') then
self.countdown = self.countdown - ev:ticks()
self.buildup_turns = self.buildup_turns + ev:ticks()
if (self.buildup_turns > self.size_buildup_time) then
self.buildup_turns = self.size_buildup_time
end
while self.countdown <= 0 do
self:do_fog(marker)
self.countdown = self.countdown +
crawl.random_range(self.delay_min, self.delay_max, 1)
end
elseif ev:type() == dgn.dgn_event_type('entered_level') then
for i = 1, self.start_clouds do
self:do_fog(marker)
self.countdown = crawl.random_range(self.delay_min, self.delay_max, 1)
self.buildup_turns = 0
end
end
end
function FogMachine:write(marker, th)
file.marshall(th, self.cloud_type)
file.marshall(th, self.walk_dist)
file.marshall(th, self.pow_min)
file.marshall(th, self.pow_max)
file.marshall(th, self.pow_rolls)
file.marshall(th, self.delay_min)
file.marshall(th, self.delay_max)
file.marshall(th, self.kill_cat)
file.marshall(th, self.size_min)
file.marshall(th, self.size_max)
file.marshall(th, self.spread_rate)
file.marshall(th, self.start_clouds)
file.marshall(th, self.size_buildup_amnt)
file.marshall(th, self.size_buildup_time)
file.marshall(th, self.spread_buildup_amnt)
file.marshall(th, self.spread_buildup_time)
file.marshall(th, self.buildup_turns)
file.marshall(th, self.countdown)
end
function FogMachine:read(marker, th)
self.cloud_type = file.unmarshall_string(th)
self.walk_dist = file.unmarshall_number(th)
self.pow_min = file.unmarshall_number(th)
self.pow_max = file.unmarshall_number(th)
self.pow_rolls = file.unmarshall_number(th)
self.delay_min = file.unmarshall_number(th)
self.delay_max = file.unmarshall_number(th)
self.kill_cat = file.unmarshall_string(th)
self.size_min = file.unmarshall_number(th)
self.size_max = file.unmarshall_number(th)
self.spread_rate = file.unmarshall_number(th)
self.start_clouds = file.unmarshall_number(th)
self.size_buildup_amnt = file.unmarshall_number(th)
self.size_buildup_time = file.unmarshall_number(th)
self.spread_buildup_amnt = file.unmarshall_number(th)
self.spread_buildup_time = file.unmarshall_number(th)
self.buildup_turns = file.unmarshall_number(th)
self.countdown = file.unmarshall_number(th)
setmetatable(self, FogMachine)
return self
end
function fog_machine(pars)
return FogMachine:new(pars)
end
function fog_machine_geyser(cloud_type, size, power, buildup_amnt,
buildup_time)
return FogMachine:new {
cloud_type = cloud_type, pow_max = power, size = size,
delay_min = power , delay_max = power * 2,
size_buildup_amnt = buildup_amnt or 0,
size_buildup_time = buildup_time or 1
}
end
function fog_machine_spread(cloud_type, size, power, buildup_amnt,
buildup_time)
return FogMachine:new {
cloud_type = cloud_type, pow_max = power, spread_rate = size,
size = 1, delay_min = 5, delay_max = 15,
spread_buildup_amnt = buildup_amnt or 0,
spread_buildup_time = buildup_time or 1
}
end
function fog_machine_brownian(cloud_type, size, power)
return FogMachine:new {
cloud_type = cloud_type, size = 1, pow_max = power,
walk_dist = size, delay_min = 1, delay_max = power / size
}
end
|