baturinsky / sequencer

Sheduling function calls at certain time. Can be used for playing notes, spawning enemies etc.

sequencer

Sheduling function calls at certain time. Can be used for playing notes, spawning enemies etc.

Schedule are written as strings in following format.

• Number, or number/number, or /number: delay as much time before following actions

• Letter, followed by letters and numbers - call a function with such name, or start playing sequence with such name in parralel.

• as before, but with (parameters) - call function with these parameters, as array split by ",". Can use numbers and strings without "" and spaces.

Example (uses https://github.com/KilledByAPixel/ZzFX):

  let seq = sequencer(
    {zzfx:zzfx, say:(text)=>console.log(text)},
    `
    a: zzfx(1.7,0,50,0.03,0.05,0.3,,2,,,,,,-0.1)
    b: zzfx(1.5,0.5,270,,0.1,,1,1.5,,,,,,,,0.1,0.01)
    seq1: a 1 a 1 a /8 b say(a) 7/8 a 1 a
    seq2: a /8 a /8 a /8 say(mooo) seq1 5/4 seq1
    `
  );

  seq("say(hi) seq2 1 b 0.5 b b 0.5 b b b").play();

API

typescript import sequencer from "./sequencer";

and/or

typescript import {SequencePlayer, SequenceBuilder, SequenceCollection} from "./sequencer";

SequencePlayer is created with [time, callback][] and can be used either by calling methods continue(deltaTime) or play(timeScaleInMilliseconds). Can by used by itself if you are not interested in string-encoded sequences.

SequenceBuilder creates sequences that SequencePlayer can use from formatted string and library of sequences and function in form of "map name=>function/sequence as string"

SequenceCollection is created with a map of functions and a string with sequence codes on each line starting with "name:". Has methods add(id, sequenceString) to add sequence and seq(id) to get it by id.

sequencer(default export) - same parameters as SequenceCollection. Returns a function that from sequenceCode creates a SequencePlayer.