add conway life

4 files changed, 122 insertions, 4 deletions

diff --git a/client/lib/kalimba.js b/client/lib/kalimba.js
index d3cafbb..249560f 100644
--- a/client/lib/kalimba.js
+++ b/client/lib/kalimba.js
@@ -1,10 +1,9 @@
 import Tone from 'tone'
 import { choice } from './util'
+import output from './output'
 
 const player_count = 4
 
-const compressor = new Tone.Compressor(-30, 3).toMaster()
-
 const samples = [
   { root: 226, fn: 'samples/380737__cabled-mess__sansula-01-a-raw.wav', },
   { root: 267, fn: 'samples/380736__cabled-mess__sansula-02-c-raw.wav', },
@@ -28,12 +27,21 @@ samples.forEach((sample) => {
       retrigger: true,
       playbackRate: 1,
     })
-    player.connect(compressor)
+    player.connect(output)
     sample.players.push(player)
   }
 })
 
 function play (freq) {
+/*
+	while (freq < 440) {
+	  freq *= 2
+	}
+	while (freq > 880) {
+	  freq /= 2
+	}
+	freq /= 2
+*/
   const best = { sample: choice(samples) }
   best.sample.index = (best.sample.index + 1) % player_count
 
@@ -41,6 +49,9 @@ function play (freq) {
   player.playbackRate = freq / best.sample.root
   player.start()
 }
+function pause () {
+  // no-op
+}
 
-export default { play }
+export default { play, pause }
 
diff --git a/client/lib/life.js b/client/lib/life.js
new file mode 100644
index 0000000..26ff0bf
--- /dev/null
+++ b/client/lib/life.js
@@ -0,0 +1,75 @@
+
+let w, h, a, b, notes, assign
+function init(z, fn){
+  // really bad
+  notes = z
+  assign = fn
+  build()
+  setTempo(50)
+}
+function build(){
+  w = notes.length
+  h = notes[0].length
+  a = a || new Array(w)
+  b = b || new Array(w)
+  for (var i = 0; i < w; i++) {
+    a[i] = a[i] || new Array(h)
+    b[i] = b[i] || new Array(h)
+    for (var j = 0; j < h; j++) {
+      a[i][j] = b[i][j] = (notes[i][j] && notes[i][j].playing) ? 1 : 0
+    }
+  }
+}
+let timeout, delay = 1200 // ~120 bpm
+function toggle(){
+  build()
+  if (timeout) {
+    clearTimeout(timeout)
+    timeout = null
+  }
+  else {
+    step()
+  }
+}
+function assign_item(freq,state){
+  b[freq.i][freq.j] = state ? 1 : 0
+}
+function setTempo(bpm){
+  console.log('bpm:', bpm)
+  delay = 60000/bpm
+}
+function swap () {
+  var tmp = a
+  a = b
+  b = tmp
+}
+function step() {
+  clearTimeout(timeout)
+  timeout = setTimeout(step, delay)
+  swap()
+  let i, j, ni, pi, nj, pj, score, state
+  for (i = 0; i < w; i++) {
+    for (j = 0; j < h; j++) {
+      ni = i === 0 ? w-1 : i-1
+      pi = i === w-1 ? 0 : i+1
+      nj = j === 0 ? h-1 : j-1
+      pj = j === h-1 ? 0 : j+1
+      score = a[ni][nj] + a[ni][j] + a[ni][pj] + a[i][nj] + a[i][pj] + a[pi][nj] + a[pi][j] + a[pi][pj]
+      state = fitness(a[i][j], score)
+      b[i][j] = state
+      if (a[i][j] !== state) {
+        assign(notes[i][j], state)
+      }
+    }
+  }
+}
+function fitness (old, score) {
+  if (old === 1) {
+    if (score === 2 || score === 3) return 1
+  } else {
+    if (score === 3) return 1
+  }
+  return 0
+}
+
+export default { init, step, assign_item, toggle, setTempo }
\ No newline at end of file
diff --git a/client/lib/organ.js b/client/lib/organ.js
new file mode 100644
index 0000000..fe2315c
--- /dev/null
+++ b/client/lib/organ.js
@@ -0,0 +1,27 @@
+import Tone from 'tone'
+import { choice } from './util'
+import output from './output'
+
+const player_count = 4
+
+const oscillators = {}
+
+function play (freq) {
+  const osc = oscillators[freq] = oscillators[freq] || {}
+  if (!osc.el) {
+    osc.el = new Tone.Oscillator(freq , "sine")
+    osc.el.connect(output)
+  }
+  osc.el.start()
+  osc.playing = true
+  return osc
+}
+function pause(freq) {
+  const osc = oscillators[freq] = oscillators[freq] || {}
+  osc.el && osc.el.stop()
+  osc.playing = false
+  return osc
+}
+
+export default { play, pause, oscillators }
+
diff --git a/client/lib/output.js b/client/lib/output.js
new file mode 100644
index 0000000..2155009
--- /dev/null
+++ b/client/lib/output.js
@@ -0,0 +1,5 @@
+import Tone from 'tone'
+
+const compressor = new Tone.Compressor(-30, 3).toMaster()
+
+export default compressor