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import Constant, Error, Op, Input, T, Array, sig, evt from require 'alv.base'
apply_range = (range, val) ->
if range\type! == T.str
switch range!
when 'uni' then val
when 'bip' then val*2 - 1
when 'rad' then val*2 * math.pi
when 'deg' then val * 360
else
error Error 'argument', "unknown range '#{range!}'"
elseif range\type! == T.num
val * range!
else
error Error 'argument', "range has to be a string or number"
range_doc = "
range can be one of:
- 'uni' [ 0 - 1[ (default)
- 'bip' [-1 - 1[
- 'rad' [ 0 - tau[
- 'deg' [ 0 - 360[
- (num) [ 0 - num["
pattern = -evt.bang + -(sig.num / sig.str)
num = Constant.meta
meta:
name: 'num'
summary: 'Generate a random number.'
examples: { '(random/num [trigger] [range]))' }
description: "Generate a random value in `range` when created and on `trig`.
#{range_doc}"
value: class extends Op
new: (...) =>
super ...
@out or= T.num\mk_sig!
@state or @gen!
gen: => @state = math.random!
setup: (inputs) =>
{ trig, range } = pattern\match inputs
super
trig: trig and Input.hot trig
range: Input.hot range or Constant.str 'uni'
tick: =>
@gen! if @inputs.trig and @inputs.trig\dirty!
@out\set apply_range @inputs.range, @state
vec = (n) ->
typ = Array n, T.num
Constant.meta
meta:
name: "vec#{n}"
summary: 'Generate a random vector.'
examples: { '(random/vec#{n} [trigger] [range]))' }
description: "Generate a random #{typ} in `range` when created and on `trig`.
#{range_doc}"
value: class extends Op
new: (...) =>
super ...
@out or= typ\mk_sig!
@state or @gen!
gen: => @state = for i=1,n do math.random!
setup: (inputs) =>
{ trig, range } = pattern\match inputs
super
trig: trig and Input.hot trig
range: Input.hot range or Constant.str 'uni'
tick: (setup) =>
@gen! if @inputs.trig and @inputs.trig\dirty!
@out\set [apply_range @inputs.range, v for v in *@state]
Constant.meta
meta:
name: 'random'
summary: "Random number generation."
value:
:num
vec2: vec 2
vec3: vec 3
vec4: vec 4
|
