pulling in wav2pix code

3 files changed, 189 insertions, 141 deletions

diff --git a/app/client/util/format.js b/app/client/util/format.js
new file mode 100644
index 0000000..e436a3e
--- /dev/null
+++ b/app/client/util/format.js
@@ -0,0 +1,132 @@
+export function timeInSeconds(n){
+  return (n / 10).toFixed(1) + ' s.'
+}
+export function gerund(s){
+  return s.replace(/e?$/, 'ing')
+}
+export function commatize (n, radix) {
+  radix = radix || 1024
+  var nums = [], i, counter = 0, r = Math.floor
+  if (n > radix) {
+    n /= radix
+    nums.unshift(r((n * 10) % 10))
+    nums.unshift(".")
+  }
+  do {
+    i = n % 10
+    n = r(n / 10)
+    if (n && ! (++counter % 3))
+      { i = ' ' + r(i) }
+    nums.unshift(r(i))
+  }
+  while (n)
+  return nums.join("")
+}
+export function carbon_date (date, no_bold) {
+  var span = (+new Date() - new Date(date)) / 1000, color
+  if (! no_bold && span < 86400) // modified today
+    { color = "new" }
+  else if (span < 604800) // modifed this week
+    { color = "recent" }
+  else if (span < 1209600) // modifed 2 weeks ago
+    { color = "med" }
+  else if (span < 3024000) // modifed 5 weeks ago
+    { color = "old" }
+  else if (span < 12315200) // modifed 6 months ago
+    { color = "older" }
+  else
+    { color = "quiet" }
+  return color
+}
+export function hush_views (n, bias, no_bold) {
+  var txt = commatize(n, 1000)
+  bias = bias || 1
+  n = n || 0
+  if (n < 30) { return["quiet", n + " v."] }
+  if (n < 200) { return ["quiet", txt + " v."] }
+  else if (n < 500) { return ["quiet", txt + " v."] }
+  else if (n < 1000) { return ["old", txt + " v."] }
+  else if (n < 5000) { return ["med", txt + " kv."] }
+  else if (no_bold || n < 10000) { return ["recent", txt + " kv."] }
+  else { return ["new", txt + " kv."] }
+}
+export function hush_threads (n, bias, no_bold) {
+  var txt = commatize(n, 1000)
+  bias = bias || 1
+  n = n || 0
+  if (n < 10) { return["quiet", n + " t."] }
+  else if (n < 25) { return ["old", txt + " t."] }
+  else if (n < 50) { return ["med", txt + " t."] }
+  else if (no_bold || n < 100) { return ["recent", txt + " t."] }
+  else { return ["new", txt + " t."] }
+}
+export function hush_size (n, bias, no_bold) {
+  var txt = commatize(Math.round(n / 1024))
+  bias = 1 || bias
+  n = n || 0
+  if (! n) { return ['', ''] }
+  if (n < 1000) {
+    return ["quiet", n + " b."]
+  }
+  if (n < 1000000) {
+    return ["quiet", txt + " kb."]
+  }
+  else if (n < (20000000/bias)) {
+    return ["quiet", txt + " mb."]
+  }
+  else if (n < (50000000/bias)) {
+    return ["old", txt + " mb."]
+  }
+  else if (n < (80000000/bias)) {
+    return ["med", txt + " mb."]
+  }
+  else if (no_bold || n < (170000000/bias)) {
+    return ["recent", txt + " mb."]
+  }
+  else {
+    return ["new", txt + " mb."]
+  }
+}
+export function hush_null (n, unit, no_bold) {
+  var s = unit ? n + " " + unit + "." : n
+  if (n < 3) {
+    return ["quiet", s]
+  }
+  else if (n < 6) {
+    return ["older", s]
+  }
+  else if (n < 10) {
+    return ["old", s]
+  }
+  else if (n < 16) {
+    return ["med", s]
+  }
+  else if (no_bold || n < 21) {
+    return ["recent", s]
+  }
+  else {
+    return ["new", s]
+  }
+}
+export function get_age (t) {
+  var age = Math.abs(+Date.now() - new Date(t))/1000
+  var r = Math.floor
+  var m
+  if (age < 5) { return "now" }
+  if (age < 60) { return r(age) + "s" }
+  age /= 60
+  if (age < 60) { return r(age) + "m" }
+  m = r(age % 60)
+  age /= 60
+  if (m > 0 && age < 2) { return r(age) + "h" + m + "m" }
+  if (age < 24) { return r(age) + "h" }
+  age /= 24
+  if (age < 7) { return r(age) + "d" }
+  age /= 7
+  if (age < 12) { return r(age) + "w" }
+  age /= 4
+  if (age < 12) { return r(age) + "m" }
+  age /= 12
+  return r(age) + "y"
+}
+export function courtesy_s (n, s) { return n == 1 ? "" : (s || "s") }
diff --git a/app/client/util/index.js b/app/client/util/index.js
index c5eb8dd..a811dcf 100644
--- a/app/client/util/index.js
+++ b/app/client/util/index.js
@@ -1,7 +1,11 @@
 import * as sort from './sort'
+import * as format from './format'
+import * as maths from './math'
 
 export {
-  sort
+  sort,
+  ...maths,
+  ...format,
 }
 
 export const is_iphone = !!((navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i)))
@@ -16,13 +20,6 @@ htmlClassList.remove('loading')
 
 // window.debug = false
 
-export function clamp(n,a,b) { return n<a?a:n<b?n:b }
-export function norm(n,a,b) { return (n-a) / (b-a) }
-export function lerp(n,a,b) { return (b-a)*n+a }
-export function mix(n,a,b) { return a*(1-n)+b*n }
-export function randint(n) { return Math.floor(Math.random()*n) }
-export function randrange(a,b){ return Math.random() * (b-a) + a }
-
 document.body.style.backgroundImage = 'linear-gradient(' + (randint(40)+40) + 'deg, #fde, #ffe)'
 
 export const allProgress = (promises, progress_cb) => {
@@ -37,136 +34,3 @@ export const allProgress = (promises, progress_cb) => {
   })
   return Promise.all(promises)
 }
-
-export function timeInSeconds(n){
-  return (n / 10).toFixed(1) + ' s.'
-}
-export function gerund(s){
-  return s.replace(/e?$/, 'ing')
-}
-export function commatize (n, radix) {
-  radix = radix || 1024
-  var nums = [], i, counter = 0, r = Math.floor
-  if (n > radix) {
-    n /= radix
-    nums.unshift(r((n * 10) % 10))
-    nums.unshift(".")
-  }
-  do {
-    i = n % 10
-    n = r(n / 10)
-    if (n && ! (++counter % 3))
-      { i = ' ' + r(i) }
-    nums.unshift(r(i))
-  }
-  while (n)
-  return nums.join("")
-}
-export function carbon_date (date, no_bold) {
-  var span = (+new Date() - new Date(date)) / 1000, color
-  if (! no_bold && span < 86400) // modified today
-    { color = "new" }
-  else if (span < 604800) // modifed this week
-    { color = "recent" }
-  else if (span < 1209600) // modifed 2 weeks ago
-    { color = "med" }
-  else if (span < 3024000) // modifed 5 weeks ago
-    { color = "old" }
-  else if (span < 12315200) // modifed 6 months ago
-    { color = "older" }
-  else
-    { color = "quiet" }
-  return color
-}
-export function hush_views (n, bias, no_bold) {
-  var txt = commatize(n, 1000)
-  bias = bias || 1
-  n = n || 0
-  if (n < 30) { return["quiet", n + " v."] }
-  if (n < 200) { return ["quiet", txt + " v."] }
-  else if (n < 500) { return ["quiet", txt + " v."] }
-  else if (n < 1000) { return ["old", txt + " v."] }
-  else if (n < 5000) { return ["med", txt + " kv."] }
-  else if (no_bold || n < 10000) { return ["recent", txt + " kv."] }
-  else { return ["new", txt + " kv."] }
-}
-export function hush_threads (n, bias, no_bold) {
-  var txt = commatize(n, 1000)
-  bias = bias || 1
-  n = n || 0
-  if (n < 10) { return["quiet", n + " t."] }
-  else if (n < 25) { return ["old", txt + " t."] }
-  else if (n < 50) { return ["med", txt + " t."] }
-  else if (no_bold || n < 100) { return ["recent", txt + " t."] }
-  else { return ["new", txt + " t."] }
-}
-export function hush_size (n, bias, no_bold) {
-  var txt = commatize(Math.round(n / 1024))
-  bias = 1 || bias
-  n = n || 0
-  if (! n) { return ['', ''] }
-  if (n < 1000) {
-    return ["quiet", n + " b."]
-  }
-  if (n < 1000000) {
-    return ["quiet", txt + " kb."]
-  }
-  else if (n < (20000000/bias)) {
-    return ["quiet", txt + " mb."]
-  }
-  else if (n < (50000000/bias)) {
-    return ["old", txt + " mb."]
-  }
-  else if (n < (80000000/bias)) {
-    return ["med", txt + " mb."]
-  }
-  else if (no_bold || n < (170000000/bias)) {
-    return ["recent", txt + " mb."]
-  }
-  else {
-    return ["new", txt + " mb."]
-  }
-}
-export function hush_null (n, unit, no_bold) {
-  var s = unit ? n + " " + unit + "." : n
-  if (n < 3) {
-    return ["quiet", s]
-  }
-  else if (n < 6) {
-    return ["older", s]
-  }
-  else if (n < 10) {
-    return ["old", s]
-  }
-  else if (n < 16) {
-    return ["med", s]
-  }
-  else if (no_bold || n < 21) {
-    return ["recent", s]
-  }
-  else {
-    return ["new", s]
-  }
-}
-export function get_age (t) {
-  var age = Math.abs(+Date.now() - new Date(t))/1000
-  var r = Math.floor
-  var m
-  if (age < 5) { return "now" }
-  if (age < 60) { return r(age) + "s" }
-  age /= 60
-  if (age < 60) { return r(age) + "m" }
-  m = r(age % 60)
-  age /= 60
-  if (m > 0 && age < 2) { return r(age) + "h" + m + "m" }
-  if (age < 24) { return r(age) + "h" }
-  age /= 24
-  if (age < 7) { return r(age) + "d" }
-  age /= 7
-  if (age < 12) { return r(age) + "w" }
-  age /= 4
-  if (age < 12) { return r(age) + "m" }
-  age /= 12
-  return r(age) + "y"
-}
-export function courtesy_s (n, s) { return n == 1 ? "" : (s || "s") }
diff --git a/app/client/util/math.js b/app/client/util/math.js
new file mode 100644
index 0000000..253bacd
--- /dev/null
+++ b/app/client/util/math.js
@@ -0,0 +1,52 @@
+export function mod(n,m){ return n-(m * Math.floor(n/m)) }
+export function clamp(n,a,b) { return n<a?a:n<b?n:b }
+export function norm(n,a,b) { return (n-a) / (b-a) }
+export function lerp(n,a,b) { return (b-a)*n+a }
+export function mix(n,a,b) { return a*(1-n)+b*n }
+export function randint(n) { return Math.floor(Math.random()*n) }
+export function randrange(a,b){ return Math.random() * (b-a) + a }
+export function randsign(){ return Math.random() >= 0.5 ? -1 : 1 }
+export function choice (a){ return a[ Math.floor(Math.random() * a.length) ] }
+export function lerp(n,a,b){ return (b-a)*n+a }
+export function angle(x0,y0,x1,y1){ return Math.atan2(y1-y0,x1-x0) }
+export function dist(x0,y0,x1,y1){ return Math.sqrt(Math.pow(x1-x0,2)+Math.pow(y1-y0,2)) }
+export function xor(a,b){ a=!!a; b=!!b; return (a||b) && !(a&&b) }
+export function quantize(a,b){ return Math.floor(a/b)*b }
+export function shuffle(a){
+  for (var i = a.length; i > 0; i--){
+    var r = randint(i)
+    var swap = a[i-1]
+    a[i-1] = a[r]
+    a[r] = swap
+  }
+  return a
+}
+// returns a gaussian random function with the given mean and stdev.
+export function gaussian(mean, stdev) {
+  let y2;
+  let use_last = false;
+  return () => {
+    let y1;
+    if (use_last) {
+      y1 = y2;
+      use_last = false;
+    }
+    else {
+      let x1, x2, w;
+      do {
+        x1 = 2.0 * Math.random() - 1.0;
+        x2 = 2.0 * Math.random() - 1.0;
+        w  = x1 * x1 + x2 * x2;               
+      } while( w >= 1.0);
+      w = Math.sqrt((-2.0 * Math.log(w))/w);
+      y1 = x1 * w;
+      y2 = x2 * w;
+      use_last = true;
+    }
+
+    let retval = mean + stdev * y1;
+    if (retval > 0) 
+      return retval;
+    return -retval;
+  }
+}