fixup more code broken by ai

src2/kiri/client.js

@@ -111,7 +111,7 @@ export const client = {
         running = {};
         worker = client.newWorker();
 
-        client.onmessage = worker.onmessage = function(e) {
+        client.onmessage = worker.onmessage = (e) => {
             let now = time(),
                 reply = e.data,
                 record = running[reply.seq],

src2/kiri/layers.js

@@ -1,6 +1,6 @@
 /** Copyright Stewart Allen <sa@grid.space> -- All Rights Reserved */
 
-import { newPolygon } from '../geo/polygon.js';
+import { newPolygon, Polygon } from '../geo/polygon.js';
 import { polygons as POLY } from '../geo/polygons.js';
 
 export class Layers {
@@ -78,7 +78,7 @@ export class Layers {
             options.open = true;
             const polys = [];
             for (let i=0; i<lines.length-1; i += 2) {
-                polys.push(new base.Polygon()
+                polys.push(new Polygon()
                     .append(lines[i])
                     .append(lines[i+1])
                     .setOpen());
@@ -94,11 +94,14 @@ export class Layers {
 
     // an open or closed polygon
     addPoly(poly, options) {
-        return this.addPolys([poly], options);
+        return this.addPolys([ poly ], options);
     }
 
     // a polygon rendered as a webgl line
     addPolys(polys, options) {
+        if (!Array.isArray(polys)) {
+            throw "polys must be an array";
+        }
         if (polys.length === 0) {
             return this;
         }
@@ -170,8 +173,7 @@ export class Layers {
                     p1.setZ(poly.z);
                     p2.setZ(poly.z);
                 }
-                this.addPolys(p1);
-                this.addPolys(p2);
+                this.addPolys([ p1, p2 ]);
             }
             const color = opts.color ?
                 (typeof(opts.color) === 'number' ? { line: opts.color, face: opts.color } : opts.color) :

src2/kiri/render.js

@@ -129,6 +129,7 @@ async function path(levels, update, opts = {}) {
         const lasers = [];
         const sparks = [];
         const output = new Layers();
+
         layers.push(output);
 
         const pushPrint = (toolid, poly) => {

src2/kiri/widget.js

@@ -752,12 +752,11 @@ class Widget {
      */
     render(stack) {
         const mark = Date.now();
-        if (this.slices)
-        this.slices.forEach(slice => {
+        for (let slice of this.slices || []) {
             if (slice.layers) {
                 stack.add(slice.layers);
             }
-        });
+        }
         return Date.now() - mark;
     }