From 77f5e81d0a1adc497040eaa89095635f3de3924e Mon Sep 17 00:00:00 2001
From: Brian Cully <bjc@spork.org>
Date: Mon, 28 Jul 2025 08:52:51 -0400
Subject: attach octave values to frets

sometimes just do the simple thing
---
 scale.mjs | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

(limited to 'scale.mjs')

diff --git a/scale.mjs b/scale.mjs
index fbd3617..78c8433 100644
--- a/scale.mjs
+++ b/scale.mjs
@@ -1,4 +1,4 @@
-function notesBetween(a, b) {
+export function naturalNotesBetween(a, b) {
     const [tonicA, tonicB] = [a[0], b[0]]
     const abs = tonicB.charCodeAt() - tonicA.charCodeAt();
     if (abs < 0) {
@@ -8,7 +8,20 @@ function notesBetween(a, b) {
     }
 }
 
+export function chromaticNotesBetween(a, b) {
+    console.log('chromaticNotesBetween', a, b);
+    const [aNote, bNote] = [a, b].map(x => Note.fromString(x));
+    console.log(' -- aNote', aNote);
+    console.log(' -- bNote', bNote);
+    const aIndex = Note.noteRange.findIndex(x => aNote.toString() == x.toString());
+    const bIndex = Note.noteRange.findIndex(x => bNote.toString() == x.toString());
+    console.log(' -- aNote', aIndex);
+    console.log(' -- bNote', bIndex);
+    return aIndex - bIndex;
+}
+
 export function toCents([aNote, aChord], [bNote, bChord]) {
+    console.debug('toCents', [aNote, aChord], [bNote, bChord]);
     console.debug('- a', [aNote, aChord]);
     console.debug('- b', [bNote, bChord]);
     const offset = (aNote.distanceTo(bNote)) * 100;
@@ -150,7 +163,7 @@ function scaleFromIntervals(tonic, intervals) {
         const note = chromaticScale[scaleIndex + steps];
         // don't display two base notes in a row by changing
         // accidentals.
-        const delta = notesBetween(lastBase, note);
+        const delta = naturalNotesBetween(lastBase, note);
         if (delta === 0) {
             const nextBase = chromaticScale[scaleIndex + steps + 1][0];
             //console.log('0', 'prev', lastBase, 'next', nextBase, 'note', note)
-- 
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