Working scale fonction :)

src/API.ts

@@ -7,6 +7,7 @@ import { Editor } from "./main";
 import { SoundEvent } from "./classes/SoundEvent";
 import { MidiEvent } from "./classes/MidiEvent";
 import { LRUCache } from "lru-cache";
+import { SCALES } from "./Scales"
 import { InputOptions, Player } from "./classes/ZPlayer";
 import {
   samples,

src/ArrayExtensions.ts

@@ -1,4 +1,5 @@
 import { type UserAPI } from "./API";
+import { SCALES } from "./Scales";
 export {};
 
 declare global {
@@ -238,7 +239,8 @@ export const makeArrayExtensions = (api: UserAPI) => {
       for (let j = 0; j < amount; j++) {
         result.push(this[i]);
       }
-    }
+      }
+
     this.length = 0;
     this.push(...result);
     return this;
@@ -341,3 +343,27 @@ export const makeArrayExtensions = (api: UserAPI) => {
   };
   Array.prototype.rand = Array.prototype.random;
 };
+
+Array.prototype.scale = function <T>(this: T[], scaleName: string = "major") {
+
+    const scale = SCALES[scaleName];
+
+    if (!scale) {
+        throw new Error(`Unknown scale ${scaleName}`);
+    }
+
+    let result = [];
+
+    for (let i = 0; i < scale.length; i++) {
+
+        if (!this[i]) {
+            result.push(this[0] + scale[i]);
+        } else {
+            result.push(this[i] + scale[i]);
+        }
+    }
+
+    this.shift()
+    this.push(...result);
+    return this;
+};

src/Scales.ts

@@ -1,4 +1,4 @@
-const SCALES: Record<string, number[]> = {
+export const SCALES: Record<string, number[]> = {
   major: [0, 2, 4, 5, 7, 9, 11],
   naturalMinor: [0, 2, 3, 5, 7, 8, 10],
   harmonicMinor: [0, 2, 3, 5, 7, 8, 11],
@@ -53,18 +53,21 @@ const SCALES: Record<string, number[]> = {
   orientalA: [0, 1, 4, 5, 6, 9, 10],
 };
 
+
+// Legacy function, see Array.prototype.scale @ ArrayExtensions.ts
+/*
 export function scale(
   n: number,
   scaleName: string = "major",
   octave: number = 4
 ): number {
-  /**
+  /*
    * Returns the MIDI note number for the given scale degree in the given scale.
    * @param {number} n - The scale degree, where 0 is the tonic.
    * @param {string} scaleName - The name of the scale.
    * @param {number} octave - The octave number.
    * @returns {number} The MIDI note number.
-   */
+   * /
   const scale = SCALES[scaleName];
 
   if (!scale) {
@@ -76,3 +79,5 @@ export function scale(
   let additionalOctaves = Math.floor(n / scale.length);
   return 60 + (octave + additionalOctaves) * 12 + scale[index];
 }
+
+*/

src/main.ts

@@ -66,6 +66,8 @@ const bindings = Object.keys(classMap).map((key) => ({
   replace: (match, p1) => `<${key} class="${classMap[key]}" ${p1}>`,
 }));
 
+
+
 export class Editor {
   universes: Universes = template_universes;
   selected_universe: string;