rand.lua

xero()
local state = 1

rand = {}
--- rand
-- rand.bool() returns true or false
function rand.bool(p)
	return rand.float() < (p or 0.5)
end

-- rand.float() returns a float x where 0.0 <= x < 1.0
-- rand.float(max) returns a float x where 0.0 <= x < max
-- rand.float(min, max) returns a float x where min <= x < max
function rand.float(a, b)
	state = state + 1
	local r = math.abs((math.sin(632459.86 * state) * 1023341.55) % 1)
	if not a then
		return r
	elseif not b then
		return r * a
	else
		return r * (a-b) + b
	end
end

-- rand.int(n) returns an integer x where 1 <= x <= n
-- rand.int(low, high) returns an number x where low <= x <= high and x = low + k for some integer k
-- rand.int(low, high, step) returns a number k where low <= k <= high and x = low + step*k for some integer k
function rand.int(a, b, c)
	if not b then
		a, b = 1, a
	end
	c = c or 1
	return math.floor(rand.float() * (b - a) / c) * c + a
end

-- rand.seed(x) sets the seed to the number x
function rand.seed(x)
	state = x
end

return Def.Actor {
    OnCommand = function() return rand end
}