Merge branch 'feature/improved-open-closed-detection' into develop

example/save.js

@@ -1,5 +1,4 @@
 import 'three.js';
-import 'three.js/loaders/STLLoader';
 import { Settings, printerSettings, userSettings, Slicer } from 'src/index.js';
 import { saveAs } from 'file-saver';
 
@@ -8,18 +7,15 @@ const settings = new Settings({
   ...userSettings
 });
 
-const stlLoader = new THREE.STLLoader();
-stlLoader.load('stl/traktor.stl', async (geometry) => {
-  geometry = new THREE.Geometry().fromBufferGeometry(geometry);
-
+const jsonLoader = new THREE.JSONLoader();
+jsonLoader.load('models/airplane.json', async geometry => {
   geometry.applyMatrix(new THREE.Matrix4().makeRotationX(Math.PI / -2));
-  geometry.applyMatrix(new THREE.Matrix4().setPosition(new THREE.Vector3(50, -0.1, 50)));
-  geometry.mergeVertices();
+  geometry.applyMatrix(new THREE.Matrix4().setPosition(new THREE.Vector3(50, 0.1, 50)));
   geometry.computeFaceNormals();
 
   const slicer = new Slicer().setGeometry(geometry);
-  const gcode = await slicer.slice(settings);
+  const gcode = slicer.sliceSync(settings);
 
-  const file = new File([gcode], 'traktor.gcode', { type: 'text/plain' });
+  const file = new File([gcode], 'gcode.gcode', { type: 'text/plain' });
   saveAs(file);
 });

jspm.config.js

@@ -19,7 +19,6 @@ SystemJS.config({
       "https": "npm:jspm-nodelibs-https@0.2.0",
       "react-dom": "npm:react-dom@15.3.2",
       "babel-plugin-transform-react-jsx": "npm:babel-plugin-transform-react-jsx@6.8.0",
-      "three.js/loaders/STLLoader": "github:mrdoob/three.js@r83/examples/js/loaders/STLLoader.js",
       "file-saver": "npm:file-saver@1.3.3"
     },
     "packages": {
@@ -139,16 +138,8 @@ SystemJS.config({
       }
     }
   },
-  meta: {
-    "three.js/loaders/STLLoader": {
-      "deps": [
-        "three.js"
-      ]
-    }
-  },
   map: {
-    "babel": "npm:babel-core@5.8.38",
-    "three.js/loaders/STLLoader": "github:mrdoob/three.js@r75/examples/js/loaders/STLLoader.js"
+    "babel": "npm:babel-core@5.8.38"
   }
 });
 

src/sliceActions/calculateLayersIntersections.js

@@ -13,6 +13,8 @@ export default function calculateLayersIntersections(lines, settings) {
   for (let lineIndex = 0; lineIndex < lines.length; lineIndex ++) {
     const line = lines[lineIndex].line;
 
+    if (line.isFlat) continue;
+
     const min = Math.ceil(Math.min(line.start.y, line.end.y) / layerHeight);
     const max = Math.floor(Math.max(line.start.y, line.end.y) / layerHeight);
 

src/sliceActions/createLines.js

@@ -1,6 +1,6 @@
 import * as THREE from 'three.js';
 
-function addLine(geometry, lineLookup, lines, a, b) {
+function addLine(geometry, lineLookup, lines, a, b, isFlat) {
   const index = lines.length;
   lineLookup[`${a}_${b}`] = index;
 
@@ -8,13 +8,13 @@ function addLine(geometry, lineLookup, lines, a, b) {
     line: new THREE.Line3(geometry.vertices[a], geometry.vertices[b]),
     connects: [],
     normals: [],
-    open: false
+    isFlat
   });
 
   return index;
 }
 
-export default function createLines(geometry, settings, openClosed) {
+export default function createLines(geometry, settings) {
   console.log('constructing unique lines from geometry');
 
   const lines = [];
@@ -22,34 +22,28 @@ export default function createLines(geometry, settings, openClosed) {
 
   for (let i = 0; i < geometry.faces.length; i ++) {
     const face = geometry.faces[i];
-    const open = openClosed[i];
-
-    if (face.normal.y !== 1 && face.normal.y !== -1) {
-      const normal = new THREE.Vector2(face.normal.z, face.normal.x).normalize();
 
     const lookupA = lineLookup[`${face.b}_${face.a}`];
     const lookupB = lineLookup[`${face.c}_${face.b}`];
     const lookupC = lineLookup[`${face.a}_${face.c}`];
 
+    const isFlat = face.normal.y !== 1 && face.normal.y !== -1;
+
     // only add unique lines
     // returns index of said line
-      const indexA = typeof lookupA !== 'undefined' ? lookupA : addLine(geometry, lineLookup, lines, face.a, face.b);
-      const indexB = typeof lookupB !== 'undefined' ? lookupB : addLine(geometry, lineLookup, lines, face.b, face.c);
-      const indexC = typeof lookupC !== 'undefined' ? lookupC : addLine(geometry, lineLookup, lines, face.c, face.a);
+    const lineIndexA = typeof lookupA !== 'undefined' ? lookupA : addLine(geometry, lineLookup, lines, face.a, face.b, isFlat);
+    const lineIndexB = typeof lookupB !== 'undefined' ? lookupB : addLine(geometry, lineLookup, lines, face.b, face.c, isFlat);
+    const lineIndexC = typeof lookupC !== 'undefined' ? lookupC : addLine(geometry, lineLookup, lines, face.c, face.a, isFlat);
 
     // set connecting lines (based on face)
-      lines[indexA].connects.push(indexB, indexC);
-      lines[indexB].connects.push(indexC, indexA);
-      lines[indexC].connects.push(indexA, indexB);
+    lines[lineIndexA].connects.push(lineIndexB, lineIndexC);
+    lines[lineIndexB].connects.push(lineIndexC, lineIndexA);
+    lines[lineIndexC].connects.push(lineIndexA, lineIndexB);
 
-      lines[indexA].normals.push(normal);
-      lines[indexB].normals.push(normal);
-      lines[indexC].normals.push(normal);
-
-      lines[indexA].open = open;
-      lines[indexB].open = open;
-      lines[indexC].open = open;
-    }
+    const normal = new THREE.Vector2(face.normal.z, face.normal.x).normalize();
+    lines[lineIndexA].normals.push(normal);
+    lines[lineIndexB].normals.push(normal);
+    lines[lineIndexC].normals.push(normal);
   }
 
   return lines;

src/sliceActions/detectOpenClosed.js

@@ -1,42 +1,45 @@
-export default function detectOpenClosed(geometry) {
+export default function detectOpenClosed(lines) {
   console.log('detecting open and closed lines');
 
-  const pools = getPools(geometry);
-  const openVertices = getOpenVertices(geometry);
+  const pools = getPools(lines);
+  const openLines = lines.map(line => line.connects.length === 2);
 
-  const openFaces = [];
   for (let i = 0; i < pools.length; i ++) {
     const pool = pools[i];
 
-    const isOpen = pool.some(face => openVertices[face.a] || openVertices[face.b] || openVertices[face.c]);
+    const isOpenGeometry = pool.some(lineIndex => openLines[lineIndex]);
 
-    if (isOpen) openFaces.splice(openFaces.length, 0, ...pool);
+    for (let j = 0; j < pool.length; j ++) {
+      const lineIndex = pool[j];
+      const line = lines[lineIndex];
+      line.openGeometry = isOpenGeometry;
+    }
+  }
 }
 
-  return geometry.faces.map(face => openFaces.includes(face));
-}
-
-function findPool(pools, faceA) {
+function findPool(pools, lines, lineIndex) {
+  const { connects } = lines[lineIndex];
   for (let i = 0; i < pools.length; i ++) {
     const pool = pools[i];
 
-    if (pool.find(faceB => faceA.a === faceB.a || faceA.a === faceB.b || faceA.a === faceB.c)) {
+    if (pool.find(lineIndex => connects.includes(lineIndex))) {
       return pool;
     }
   }
 
+  // no pool found
+  // create new pool
   const pool = [];
   pools.push(pool);
   return pool;
 }
 
-function getPools(geometry) {
+function getPools(lines) {
   const pools = [];
 
-  for (let i = 0; i < geometry.faces.length; i ++) {
-    const face = geometry.faces[i];
-    const pool = findPool(pools, face);
-    pool.push(face);
+  for (let lineIndex = 0; lineIndex < lines.length; lineIndex ++) {
+    const pool = findPool(pools, lines, lineIndex);
+    pool.push(lineIndex);
   }
 
   for (let i = 0; i < pools.length; i ++) {
@@ -46,8 +49,9 @@ function getPools(geometry) {
       const poolB = pools[j];
 
       for (let k = 0; k < poolA.length; k ++) {
-        const faceA = poolA[k];
-        if (poolB.find(faceB => faceA.a === faceB.a || faceA.a === faceB.b || faceA.a === faceB.c)) {
+        const { connects } = lines[poolA[k]];
+
+        if (poolB.find(lineIndex => connects.includes(lineIndex))) {
           poolA.splice(poolA.length, 0, ...poolB);
           poolB.splice(0, poolB.length);
         }
@@ -57,15 +61,3 @@ function getPools(geometry) {
 
   return pools.filter(pool => pool.length > 0);
 }
-
-function getOpenVertices(geometry) {
-  const vertices = Array(geometry.vertices.length).fill(0);
-  for (let i = 0; i < geometry.faces.length; i ++) {
-    const face = geometry.faces[i];
-    vertices[face.a] ++;
-    vertices[face.b] ++;
-    vertices[face.c] ++;
-  }
-
-  return vertices.map(numFaces => numFaces < 4);
-}

src/sliceActions/intersectionsToShapes.js

@@ -22,7 +22,7 @@ export default function intersectionsToShapes(layerIntersectionIndexes, layerInt
       const shape = [];
 
       const firstPoints = [index];
-      const { open: openGeometry } = lines[index];
+      const { openGeometry } = lines[index];
       let isFirstPoint = true;
       let openShape = true;
 

src/sliceActions/slice.js

@@ -13,12 +13,11 @@ import applyPrecision from './applyPrecision.js';
 import removePrecision from './removePrecision.js';
 
 export default function(geometry, settings) {
-  geometry.mergeVertices();
   geometry.computeFaceNormals();
 
   // get unique lines from geometry;
-  const openClosed = detectOpenClosed(geometry);
-  const lines = createLines(geometry, settings, openClosed);
+  const lines = createLines(geometry, settings);
+  const openClosed = detectOpenClosed(lines);
 
   const {
     layerIntersectionIndexes,