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
|
if not modules then modules = { } end modules ['supp-ran'] = {
version = 1.001,
comment = "companion to supp-ran.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- We cannot ask for the current seed, so we need some messy hack here.
local report_system = logs.reporter("system","randomizer")
local math = math
local context, commands = context, commands
local random, randomseed, round, seed, last = math.random, math.randomseed, math.round, false, 1
local maxcount = 2^30-1 -- 1073741823
local function setrandomseedi(n,comment)
if not n then
-- n = 0.5 -- hack
end
if n <= 1 then
n = n * maxcount
end
n = round(n)
if false then
report_system("setting seed to %s (%s)",n,comment or "normal")
end
randomseed(n)
last = random(0,maxcount) -- we need an initial value
end
math.setrandomseedi = setrandomseedi
function commands.getrandomcounta(min,max)
last = random(min,max)
context(last)
end
function commands.getrandomcountb(min,max)
last = random(min,max)/65536
context(last)
end
function commands.setrandomseed(n)
last = n
setrandomseedi(n)
end
function commands.getrandomseed(n)
context(last)
end
-- maybe stack
function commands.freezerandomseed(n)
if seed == false or seed == nil then
seed = last
setrandomseedi(seed,"freeze",seed)
end
if n then
randomseed(n)
end
end
function commands.defrostrandomseed()
if seed ~= false then
setrandomseedi(seed,"defrost",seed) -- was last (bug)
seed = false
end
end
|
