added comments to multipleOffsets.js

hunks/image/multipleOffsets.js

@@ -57,6 +57,7 @@ export default function MultipleOffsets() {
   this.loop = () => {
     if (imageIn.io() && !vectors.io()) {
       function work() {
+        //imports pipe, edgeDetectHelper, orientEdgesHelper, vectorizeHelper; could be a good idea to break these into different files
         self.importScripts("http://localhost:8080/helpers.js"); 
 
         self.onmessage = function(e) {
@@ -75,8 +76,9 @@ export default function MultipleOffsets() {
               vectorizeHelper
             )(e.data);
 
-            vectors = [...vectors, ...newVectors];
+            vectors.push(...newVectors);
 
+            // we only want this to run once if the totalOffset is the offsetDiameter
             if (offset === e.data.totalOffset) break;
 
             offset += e.data.stepover;