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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")
commands = commands or { }
local commands = commands
local math = math
local random, randomseed, round, seed, last = math.random, math.randomseed, math.round, false, 1
local texwrite = tex.write
function math.setrandomseedi(n,comment)
if not n then
--~ n = 0.5 -- hack
end
if n <= 1 then
n = n*1073741823 -- maxcount
end
n = round(n)
if false then
report_system("setting seed to %s (%s)",n,comment or "normal")
end
randomseed(n)
last = random(0,1073741823) -- we need an initial value
end
function commands.getrandomcounta(min,max)
last = random(min,max)
texwrite(last)
end
function commands.getrandomcountb(min,max)
last = random(min,max)/65536
texwrite(last)
end
function commands.setrandomseed(n)
last = n
math.setrandomseedi(n)
end
function commands.getrandomseed(n)
texwrite(last)
end
-- maybe stack
function commands.freezerandomseed(n)
-- print("<<<<",seed,last)
if seed == false or seed == nil then
seed = last
math.setrandomseedi(seed,"freeze",seed)
end
if n then
randomseed(n)
end
end
function commands.defrostrandomseed()
-- print(">>>>",seed,last)
if seed ~= false then
math.setrandomseedi(seed,"defrost",seed) -- was last (bug)
seed = false
end
end
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