From 844494bb547004fb1ac06bb2a3f06be51618d3b7 Mon Sep 17 00:00:00 2001
From: Brian Cully <bjc@spork.org>
Date: Thu, 10 Apr 2025 14:13:20 -0400
Subject: js: add stubs for aug/dim scales

---
 key-picker.mjs |  6 ++++++
 scale.mjs      | 26 ++++++++++++++++++++++++--
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/key-picker.mjs b/key-picker.mjs
index 6d2efbe..f88f45c 100644
--- a/key-picker.mjs
+++ b/key-picker.mjs
@@ -6,6 +6,10 @@ function scaleFrom(tonic, scale) {
         return MajorScale(tonic);
     case 'minor':
         return MinorScale(tonic);
+    case 'aug':
+        return AugmentedScale(tonic);
+    case 'dim':
+        return DiminishedScale(tonic);
     default:
         throw new Error('how this happen')
     }
@@ -111,4 +115,6 @@ export default function KeyPicker(form) {
         elt.onclick = handleNoteClick;
     });
     formChanged(form);
+
+    console.log('bjc', 'Cdim', DiminishedScale('C').toString());
 }
diff --git a/scale.mjs b/scale.mjs
index 0ee079a..b364a3e 100644
--- a/scale.mjs
+++ b/scale.mjs
@@ -86,6 +86,9 @@ export class Note {
         const alternate = this.toAlternateString();
         const otherStr = other.toString();
         const delta = otherStr.charCodeAt() - alternate.charCodeAt();
+        //        if (other.root == 'G' && other.isSharp == true) {
+        //console.debug('bjc', 'other', otherStr, 'me', this.toString(), 'alt', alternate, 'delta', delta);
+        //        }
         if (delta === -1 || delta === 1) {
             return alternate;
         } else {
@@ -122,13 +125,16 @@ function scaleFromIntervals(tonic, intervals) {
         const delta = notesBetween(lastBase, note);
         if (delta === 0) {
             const nextBase = chromaticScale[scaleIndex + steps + 1][0];
+            //console.log('0', 'prev', lastBase, 'next', nextBase, 'note', note)
             scale.push(`${nextBase}♭`)
         } else if (delta === 1) {
+            //console.log('1', 'note', note)
             scale.push(`${note}`)
         } else {
             // we can only be two away, so take the sharp of the
             // previous note.
             const nextBase = chromaticScale[scaleIndex + steps - 1][0];
+            //console.log('other', 'prev', lastBase, 'next', nextBase, 'note', note);
             scale.push(`${nextBase}♯`)
         }
         lastBase = scale[scale.length-1];
@@ -172,17 +178,33 @@ class Scale {
 }
 
 export function MajorScale(tonic) {
-    console.debug(`MajorScale(${tonic})`);
+    //    console.debug(`MajorScale(${tonic})`);
     const intervals = [2, 2, 1, 2, 2, 2];
     return new Scale(tonic, intervals);
 }
 
 export function MinorScale(tonic) {
-    console.debug(`MinorScale(${tonic})`);
+    //    console.debug(`MinorScale(${tonic})`);
     const intervals = [2, 1, 2, 2, 1, 2];
     return new Scale(tonic, intervals);
 }
 
+export function AugmentedScale(tonic) {
+    //    console.debug(`AugmentedScale(${tonic})`);
+    const intervals = [2, 2, 1, 1, 2, 2];
+    //               C D Eb  F Gb Ab, C
+    return new Scale(tonic, intervals);
+}
+
+export function DiminishedScale(tonic) {
+    //    console.debug(`DiminishedScale(${tonic})`);
+    const intervals = [2, 1, 2, 1, 2, 1];
+    //               C D Eb  F Gb Ab, Bb
+    return new Scale(tonic, intervals);
+}
+
+// todo: add sus4/sus2
+
 // well, a lot of them.
 export const allDiatonicScales = chromaticScale.flatMap(tonic => {
     return [
-- 
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