number sequences

3 files changed, 87 insertions, 37 deletions

diff --git a/client/index.js b/client/index.js
index 3c56825..2c986dd 100644
--- a/client/index.js
+++ b/client/index.js
@@ -20,7 +20,7 @@ import {
   frequencyInRange,
   mod,
 } from "./lib/util";
-import { PRIMES } from "./lib/primes";
+import { scales } from "./lib/scales";
 
 let instrument = kalimba;
 
@@ -40,7 +40,6 @@ let notes = [];
 let base_x = 0;
 let base_y = 0;
 let scaleMode = 0;
-let scaleModeCount = 5;
 let is_split = false;
 let frequencies;
 
@@ -60,6 +59,10 @@ function build() {
   h = window.innerHeight;
   ws = Math.ceil(w / s);
   hs = Math.ceil(h / s);
+  const scale = scales[scaleMode % scales.length];
+  if (scale.reset) {
+    scale.reset(base_x, base_y, ws, hs);
+  }
   for (var i = 0; i < ws; i++) {
     notes[i] = [];
     for (var j = 0; j < hs; j++) {
@@ -74,7 +77,7 @@ function rebuild() {
 }
 function log() {
   const seen = {};
-  console.log(notes);
+  // console.log(notes);
   for (let i = 0; i < 8; i++) {
     for (let j = 0; j < 8; j++) {
       const frequency = notes[i][j].frequency;
@@ -85,7 +88,7 @@ function log() {
     }
   }
   frequencies = Object.values(seen).sort((a, b) => a - b);
-  console.log(frequencies);
+  // console.log(frequencies);
   console.log(frequencies.length, "unique frequencies in 8x8");
 }
 function play(freq) {
@@ -138,36 +141,10 @@ function toggle(freq) {
 function add(i, j) {
   const ii = i + base_x;
   const jj = j + base_y;
-  let a, b;
-  switch (scaleMode % scaleModeCount) {
-    case 1:
-      a = ii + 1;
-      b = ii + jj + 2;
-      break;
-    case 2:
-      a = ii + jj + 2;
-      b = jj + 1;
-      break;
-    case 3:
-      a = PRIMES[ii % PRIMES.length];
-      b = PRIMES[jj % PRIMES.length];
-      break;
-    case 4:
-      if (ii < jj) {
-        a = 3 ** (ii + 1);
-        b = 2 ** (jj + Math.ceil(Math.max(0, (ii * 1.0) / 2)));
-      } else {
-        a = 2 ** (ii + Math.ceil(Math.max(0, (jj * 1.2) / 2)));
-        b = 3 ** jj;
-      }
-      // b = 2 ** jj;
-      break;
-    case 0:
-    default:
-      a = ii + 1;
-      b = jj + 1;
-      break;
-  }
+
+  const scale = scales[scaleMode % scales.length];
+  const [a, b] = scale.get(ii, jj, i, j, base_x, base_y);
+
   const div = document.createElement("div");
   const frequency = (root * a) / b;
   // const frequency = root * Math.pow(2, ((b / a) % 1) + 1);
@@ -314,7 +291,7 @@ function keydown(e) {
   if (e.shiftKey) {
     step += 4;
   }
-  console.log(e.keyCode);
+  // console.log(e.keyCode);
   switch (e.keyCode) {
     case 37: // left
       base_x = Math.max(0, base_x - step);
@@ -336,11 +313,11 @@ function keydown(e) {
       midi.enable(trigger_index);
       break;
     case 189: // -
-      scaleMode = mod(scaleMode - 1, scaleModeCount);
+      scaleMode = mod(scaleMode - 1, scales.length);
       rebuild();
       break;
     case 187: // =
-      scaleMode = mod(scaleMode + 1, scaleModeCount);
+      scaleMode = mod(scaleMode + 1, scales.length);
       rebuild();
       break;
   }
diff --git a/client/lib/scales.js b/client/lib/scales.js
new file mode 100644
index 0000000..87dcb0e
--- /dev/null
+++ b/client/lib/scales.js
@@ -0,0 +1,73 @@
+/**
+ * Scales
+ * @module client/lib/scales.js;
+ */
+
+import "core-js/stable";
+import "regenerator-runtime/runtime";
+
+import {
+  Arithmetic,
+  Collatz,
+  Fibonacci,
+  Geometric,
+  Power,
+  Prime,
+  Triangle,
+} from "../vendor/number-sequences/dist/index.js";
+
+let a, b;
+
+export const scales = [
+  { name: "integer", get: (i, j) => [i + 1, j + 1] },
+  { name: "subharmonic", get: (i, j) => [i + 1, i + j + 2] },
+  { name: "harmonic", get: (i, j) => [i + j + 2, j + 1] },
+  {
+    name: "prime",
+    reset: (x, y, w, h) => {
+      a = Prime().skip(x).take(w).toJS();
+      b = Prime().skip(y).take(h).toJS();
+    },
+    get: (ii, jj, i, j) => [a[i], b[j]],
+  },
+  {
+    name: "arithmetic",
+    reset: (x, y, w, h) => {
+      a = Arithmetic(x + 1, x + 1)
+        .take(w)
+        .toJS();
+      b = Arithmetic(y + 1, y + 1)
+        .take(h)
+        .toJS();
+      console.log(a);
+    },
+    get: (ii, jj, i, j) => [a[i], b[j]],
+  },
+  // {
+  //   name: "triangle",
+  //   reset: (x, y, w, h) => {
+  //     a = Triangle().skip(x).take(w).toJS();
+  //     b = Triangle().skip(y).take(h).toJS();
+  //   },
+  //   get: (ii, jj, i, j) => [a[i], b[j]],
+  // },
+  {
+    name: "collatz",
+    reset: (x, y, w, h) => {
+      a = Collatz(x + 1)
+        .take(w)
+        .toJS();
+      b = Collatz(y + 1)
+        .take(h)
+        .toJS();
+    },
+    get: (ii, jj, i, j) => [a[i], b[j]],
+  },
+  {
+    name: "pythagorean",
+    get: (i, j) =>
+      i < j
+        ? [3 ** (i + 1), 2 ** (j + Math.ceil(Math.max(0, (i * 1.0) / 2)))]
+        : [2 ** (i + Math.ceil(Math.max(0, (j * 1.2) / 2))), 3 ** j],
+  },
+];
diff --git a/client/vendor/number-sequences b/client/vendor/number-sequences
new file mode 160000
+Subproject 9af8a3d9401d891c86fd314b5fb00d50a9a059c