From 45b0f541b136328d153838b8afcb964a9fb36cdc Mon Sep 17 00:00:00 2001
From: casperlamboo <casperlamboo@gmail.com>
Date: Mon, 12 Feb 2018 10:28:42 +0100
Subject: [PATCH] send typed array instead of string across worker

---
 src/sliceActions/helpers/binary.js | 15 +++++++++++++++
 src/slicer.js                      |  6 +++++-
 src/slicer.worker.js               |  5 ++++-
 3 files changed, 24 insertions(+), 2 deletions(-)
 create mode 100644 src/sliceActions/helpers/binary.js

diff --git a/src/sliceActions/helpers/binary.js b/src/sliceActions/helpers/binary.js
new file mode 100644
index 0000000..7e6b33a
--- /dev/null
+++ b/src/sliceActions/helpers/binary.js
@@ -0,0 +1,15 @@
+export function stringToTypedArray(string) {
+  const array = new Uint8Array(string.length);
+  for (let i = 0; i < string.length; i ++) {
+    array[i] = string.charCodeAt(i);
+  }
+  return array;
+}
+
+export function typedArrayToString(array) {
+  let string = '';
+  for (let i = 0; i < array.length; i ++) {
+    string += String.fromCharCode(array[i]);
+  }
+  return string;
+}
diff --git a/src/slicer.js b/src/slicer.js
index 79590cb..2ebba5c 100644
--- a/src/slicer.js
+++ b/src/slicer.js
@@ -1,6 +1,7 @@
 import * as THREE from 'three';
 import slice from './sliceActions/slice.js';
 import SlicerWorker from './slicer.worker.js';
+import { typedArrayToString } from './sliceActions/helpers/binary.js';
 
 export function sliceMesh(settings, mesh, sync = false, constructLinePreview = false, onProgress) {
   if (!mesh || !mesh.isMesh) {
@@ -95,6 +96,9 @@ function sliceAsync(settings, geometry, openObjectIndexes, constructLinePreview,
         case 'SLICE': {
           slicerWorker.terminate();
 
+          const { gcode } = data;
+          gcode.gcode = typedArrayToString(gcode.gcode);
+
           // if (data.gcode.linePreview) {
           //   const geometry = new THREE.BufferGeometry();
           //
@@ -108,7 +112,7 @@ function sliceAsync(settings, geometry, openObjectIndexes, constructLinePreview,
           //   data.gcode.linePreview = linePreview;
           // }
 
-          resolve(data.gcode);
+          resolve(gcode);
           break;
         }
         case 'PROGRESS': {
diff --git a/src/slicer.worker.js b/src/slicer.worker.js
index 4ebcb50..e55f9e9 100644
--- a/src/slicer.worker.js
+++ b/src/slicer.worker.js
@@ -1,5 +1,6 @@
 import 'core-js'; // polyfills
 import slice from './sliceActions/slice.js';
+import { stringToTypedArray } from './sliceActions/helpers/binary.js';
 
 const onProgress = progress => {
   self.postMessage({
@@ -15,8 +16,10 @@ self.addEventListener('message', (event) => {
       const { settings, geometry, constructLinePreview, openObjectIndexes } = data;
 
       const gcode = slice(settings, geometry, openObjectIndexes, constructLinePreview, onProgress);
+      gcode.gcode = stringToTypedArray(gcode.gcode);
+
+      const buffers = [gcode.gcode.buffer];
 
-      const buffers = [];
       // if (gcode.linePreview) {
       //   const position = gcode.linePreview.geometry.getAttribute('position').array;
       //   const color = gcode.linePreview.geometry.getAttribute('color').array;