implement new combing

package-lock.json

@@ -90,6 +90,9 @@
           "version": "1.2.0",
           "resolved": "https://registry.npmjs.org/symbol-observable/-/symbol-observable-1.2.0.tgz",
           "integrity": "sha512-e900nM8RRtGhlV36KGEU9k65K3mPb1WV70OdjfxlG2EAuM1noi/E/BaW/uMhL7bPEssK8QV57vN3esixjUvcXQ=="
+        },
+        "three-js-csg": {
+          "version": "github:Doodle3D/three-js-csg#a36f23da6e9be2405a9094de5709cb0ae8f58045"
         }
       }
     },
@@ -3229,6 +3232,11 @@
         }
       }
     },
+    "earcut": {
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/earcut/-/earcut-2.1.3.tgz",
+      "integrity": "sha512-AxdCdWUk1zzK/NuZ7e1ljj6IGC+VAdC3Qb7QQDsXpfNrc5IM8tL9nNXUmEGE6jRHTfZ10zhzRhtDmWVsR5pd3A=="
+    },
     "ecc-jsbn": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz",
@@ -7266,9 +7274,9 @@
       "integrity": "sha1-eCA6TRwyiuHYbcpkYONptX9AVa4="
     },
     "lodash-es": {
-      "version": "4.17.8",
+      "version": "4.17.10",
-      "resolved": "https://registry.npmjs.org/lodash-es/-/lodash-es-4.17.8.tgz",
+      "resolved": "https://registry.npmjs.org/lodash-es/-/lodash-es-4.17.10.tgz",
-      "integrity": "sha512-I9mjAxengFAleSThFhhAhvba6fsO0hunb9/0sQ6qQihSZsJRBofv2rYH58WXaOb/O++eUmYpCLywSQ22GfU+sA=="
+      "integrity": "sha512-iesFYPmxYYGTcmQK0sL8bX3TGHyM6b2qREaB4kamHfQyfPJP0xgoGxp19nsH16nsfquLdiyKyX3mQkfiSGV8Rg=="
     },
     "lodash._arraycopy": {
       "version": "3.0.0",
@@ -8254,9 +8262,9 @@
       }
     },
     "node-abi": {
-      "version": "2.3.0",
+      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/node-abi/-/node-abi-2.3.0.tgz",
+      "resolved": "https://registry.npmjs.org/node-abi/-/node-abi-2.4.0.tgz",
-      "integrity": "sha512-zwm6vU3SsVgw3e9fu48JBaRBCJGIvAgysDsqtf5+vEexFE71bEOtaMWb5zr/zODZNzTPtQlqUUpC79k68Hspow==",
+      "integrity": "sha512-hRUz0vG+eJfSqwU6rOgW6wNyX85ec8OEE9n4A+u+eoiE8oTePhCkUFTNmwQ+86Kyu429PCLNNyI2P2jL9qKXhw==",
       "requires": {
         "semver": "5.4.1"
       }
@@ -9344,14 +9352,14 @@
         "github-from-package": "0.0.0",
         "minimist": "1.2.0",
         "mkdirp": "0.5.1",
-        "node-abi": "2.3.0",
+        "node-abi": "2.4.0",
         "noop-logger": "0.1.1",
         "npmlog": "4.1.2",
         "os-homedir": "1.0.2",
         "pump": "2.0.1",
         "rc": "1.2.6",
-        "simple-get": "2.7.0",
+        "simple-get": "2.8.1",
-        "tar-fs": "1.16.0",
+        "tar-fs": "1.16.2",
         "tunnel-agent": "0.6.0",
         "which-pm-runs": "1.0.0"
       },
@@ -9748,8 +9756,8 @@
       "requires": {
         "hoist-non-react-statics": "2.5.0",
         "invariant": "2.2.2",
-        "lodash": "4.17.5",
+        "lodash": "4.17.10",
-        "lodash-es": "4.17.8",
+        "lodash-es": "4.17.10",
         "loose-envify": "1.3.1",
         "prop-types": "15.6.0"
       },
@@ -9760,9 +9768,9 @@
           "integrity": "sha512-6Bl6XsDT1ntE0lHbIhr4Kp2PGcleGZ66qu5Jqk8lc0Xc/IeG6gVLmwUGs/K0Us+L8VWoKgj0uWdPMataOsm31w=="
         },
         "lodash": {
-          "version": "4.17.5",
+          "version": "4.17.10",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.5.tgz",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.10.tgz",
-          "integrity": "sha512-svL3uiZf1RwhH+cWrfZn3A4+U58wbP0tGVTLQPbjplZxZ8ROD9VLuNgsRniTlLe7OlSqR79RUehXgpBW/s0IQw=="
+          "integrity": "sha512-UejweD1pDoXu+AD825lWwp4ZGtSwgnpZxb3JDViD7StjQz+Nb/6l093lx4OQ0foGWNRoc19mWy7BzL+UAK2iVg=="
         }
       }
     },
@@ -9921,8 +9929,8 @@
         "hoist-non-react-statics": "2.5.0",
         "invariant": "2.2.4",
         "is-promise": "2.1.0",
-        "lodash": "4.17.5",
+        "lodash": "4.17.10",
-        "lodash-es": "4.17.8",
+        "lodash-es": "4.17.10",
         "prop-types": "15.6.1"
       },
       "dependencies": {
@@ -9940,9 +9948,9 @@
           }
         },
         "lodash": {
-          "version": "4.17.5",
+          "version": "4.17.10",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.5.tgz",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.10.tgz",
-          "integrity": "sha512-svL3uiZf1RwhH+cWrfZn3A4+U58wbP0tGVTLQPbjplZxZ8ROD9VLuNgsRniTlLe7OlSqR79RUehXgpBW/s0IQw=="
+          "integrity": "sha512-UejweD1pDoXu+AD825lWwp4ZGtSwgnpZxb3JDViD7StjQz+Nb/6l093lx4OQ0foGWNRoc19mWy7BzL+UAK2iVg=="
         },
         "prop-types": {
           "version": "15.6.1",
@@ -10462,9 +10470,9 @@
       "integrity": "sha1-c0TLuLbib7J9ZrL8hvn21Zl1IcY="
     },
     "simple-get": {
-      "version": "2.7.0",
+      "version": "2.8.1",
-      "resolved": "https://registry.npmjs.org/simple-get/-/simple-get-2.7.0.tgz",
+      "resolved": "https://registry.npmjs.org/simple-get/-/simple-get-2.8.1.tgz",
-      "integrity": "sha512-RkE9rGPHcxYZ/baYmgJtOSM63vH0Vyq+ma5TijBcLla41SWlh8t6XYIGMR/oeZcmr+/G8k+zrClkkVrtnQ0esg==",
+      "integrity": "sha512-lSSHRSw3mQNUGPAYRqo7xy9dhKmxFXIjLjp4KHpf99GEH2VH7C3AM+Qfx6du6jhfUi6Vm7XnbEVEf7Wb6N8jRw==",
       "requires": {
         "decompress-response": "3.3.0",
         "once": "1.4.0",
@@ -10906,9 +10914,9 @@
       "dev": true
     },
     "tar-fs": {
-      "version": "1.16.0",
+      "version": "1.16.2",
-      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-1.16.0.tgz",
+      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-1.16.2.tgz",
-      "integrity": "sha512-I9rb6v7mjWLtOfCau9eH5L7sLJyU2BnxtEZRQ5Mt+eRKmf1F0ohXmT/Jc3fr52kDvjJ/HV5MH3soQfPL5bQ0Yg==",
+      "integrity": "sha512-LdknWjPEiZC1nOBwhv0JBzfJBGPJar08dZg2rwZe0ZTLQoRGEzgrl7vF3qUEkCHpI/wN9e7RyCuDhMsJUCLPPQ==",
       "requires": {
         "chownr": "1.0.1",
         "mkdirp": "0.5.1",
@@ -10999,9 +11007,6 @@
       "resolved": "https://registry.npmjs.org/three/-/three-0.88.0.tgz",
       "integrity": "sha1-QlbC/Djk+yOg0j66K2zOTfjkZtU="
     },
-    "three-js-csg": {
-      "version": "github:Doodle3D/three-js-csg#a36f23da6e9be2405a9094de5709cb0ae8f58045"
-    },
     "through": {
       "version": "2.3.8",
       "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",

package.json

@@ -23,6 +23,7 @@
     "@doodle3d/doodle3d-api": "^1.0.5",
     "@doodle3d/doodle3d-core": "github:doodle3d/doodle3d-core",
     "babel-plugin-transform-class-properties": "^6.24.1",
+    "earcut": "^2.1.3",
     "file-saver": "^1.3.3",
     "lodash": "^4.17.4",
     "material-ui": "^0.19.4",

src/sliceActions/helpers/GCode.js

@@ -1,5 +1,5 @@
-import { scale, distanceTo } from './vector2.js';
+import { distanceTo } from './vector2.js';
-import { PRECISION, VERSION } from '../../constants.js';
+import { VERSION } from '../../constants.js';
 
 export const MOVE = 'G';
 export const M_COMMAND = 'M';
@@ -55,7 +55,7 @@ export default class GCode {
   }
 
   moveTo(x, y, z, { speed }) {
-    const newNozzlePosition = scale({ x, y }, PRECISION);
+    const newNozzlePosition = { x, y };
     const lineLength = distanceTo(this._nozzlePosition, newNozzlePosition);
 
     this._duration += lineLength / speed;
@@ -74,7 +74,7 @@ export default class GCode {
   }
 
   lineTo(x, y, z, { speed, flowRate }) {
-    const newNozzlePosition = scale({ x, y }, PRECISION);
+    const newNozzlePosition = { x, y };
     const lineLength = distanceTo(this._nozzlePosition, newNozzlePosition);
 
     this._extruder += this._nozzleToFilamentRatio * lineLength * flowRate;

src/sliceActions/helpers/comb.js

@@ -1,131 +1,225 @@
-import Shape from 'clipper-js';
+import { subtract, add, normalize, dot, distanceTo, divide, normal } from './vector2.js';
-import { subtract, add, scale, normalize, dot, length, distanceTo } from './vector2.js';
+import earcut from 'earcut';
-import { PRECISION } from '../../constants.js';
 
-const TOLERANCE = 1 / PRECISION;
+// const TRIANGULATED_OUTLINES = new WeakMap();
 
 export default function comb(outline, start, end) {
-  if (distanceTo(start, end) < TOLERANCE) {
+  if (distanceTo(start, end) < 10) return [start, end];
-    return [start, end];
+
+  // if (!TRIANGULATED_OUTLINES.has(outline)) TRIANGULATED_OUTLINES.set(outline, decompose(outline));
+  // const { convexPolygons, vertices } = TRIANGULATED_OUTLINES.get(outline);
+  const { convexPolygons, vertices } = decompose(outline);
+  const startPolygon = convexPolygons.findIndex(({ face }) => pointIsInsideConvex(start, face, vertices));
+  const endPolygon = convexPolygons.findIndex(({ face }) => pointIsInsideConvex(end, face, vertices));
+  if (startPolygon === -1 || endPolygon === -1) return [start, end];
+  if (startPolygon === endPolygon) return [start, end];
+
+  const path = findClosestPath(convexPolygons, startPolygon, endPolygon);
+  if (!path) return [start, end];
+  const line = containLineInPath(path, start, end, vertices);
+
+  return line;
+}
+
+function lineIntersection(a1, a2, b1, b2) {
+  // source: http://mathworld.wolfram.com/Line-LineIntersection.html
+  const intersection = {
+    x: ((a1.x * a2.y - a1.y * a2.x) * (b1.x - b2.x) - (a1.x - a2.x) * (b1.x * b2.y - b1.y * b2.x)) / ((a1.x - a2.x) * (b1.y - b2.y) - (a1.y - a2.y) * (b1.x - b2.x)),
+    y: ((a1.x * a2.y - a1.y * a2.x) * (b1.y - b2.y) - (a1.y - a2.y) * (b1.x * b2.y - b1.y * b2.x)) / ((a1.x - a2.x) * (b1.y - b2.y) - (a1.y - a2.y) * (b1.x - b2.x))
+  };
+
+  const intersectionA = subtract(intersection, a1);
+  const directionA = subtract(a2, a1);
+  const normalA = normalize(directionA);
+  const distanceA = dot(normalA, intersectionA);
+  if (distanceA < 0 || distanceA > dot(normalA, directionA)) return false;
+
+  const intersectionB = subtract(intersection, b1);
+  const directionB = subtract(b2, b1);
+  const normalB = normalize(directionB);
+  const distanceB = dot(normalB, intersectionB);
+  if (distanceB < 0 || distanceB > dot(normalB, directionB)) return false;
+
+  return intersection;
+}
+
+function pointIsInsideConvex(point, convex, vertices) {
+  for (let i = 0; i < convex.length; i ++) {
+    const vertexA = vertices[convex[i]];
+    const vertexB = vertices[convex[(i + 1) % convex.length]];
+
+    const n = normalize(normal(subtract(vertexB, vertexA)));
+    const p = subtract(point, vertexA);
+
+    if (dot(p, n) < 0) return false;
+  }
+  return true;
+}
+
+function decompose(polygon) {
+  const vertices = polygon.reduce((points, path) => {
+    points.push(...path);
+    return points;
+  }, []);
+  const flatVertices = vertices.reduce((points, { x, y }) => {
+    points.push(x, y);
+    return points;
+  }, []);
+  let offset = 0;
+  const holes = polygon
+    .map(path => offset += path.length)
+    .slice(0, -1);
+
+  const flatTrainglesIndexed = earcut(flatVertices, holes);
+  const convexPolygons = [];
+  for (let i = 0; i < flatTrainglesIndexed.length; i += 3) {
+    const face = [
+      flatTrainglesIndexed[i],
+      flatTrainglesIndexed[i + 1],
+      flatTrainglesIndexed[i + 2]
+    ];
+    const center = divide(face.reduce((total, point) => {
+      if (!total) {
+        return vertices[point];
+      } else {
+        return add(total, vertices[point]);
+      }
+    }, null), face.length);
+    convexPolygons.push({
+      center,
+      face,
+      connects: []
+    });
   }
 
-  let combPath = new Shape([[start, end]], false, true, false);
+  for (let i = 0; i < convexPolygons.length; i ++) {
+    for (let j = i + 1; j < convexPolygons.length; j ++) {
+      const triangleIndexedA = convexPolygons[i];
+      const triangleIndexedB = convexPolygons[j];
 
-  for (let i = 0; i < outline.paths.length; i ++) {
+      const overlap = [];
-    let outlinePart = new Shape([outline.paths[i]], true, false, false, true);
+      triangleIndexedA.face.map(index => {
+        if (triangleIndexedB.face.includes(index)) overlap.push(index);
+      });
 
-    let snappedCombPaths = outlinePart.orientation(0) ? combPath.intersect(outlinePart) : combPath.difference(outlinePart);
+      if (overlap.length === 2) {
-
+        const distance = distanceTo(convexPolygons[i].center, convexPolygons[j].center);
-    snappedCombPaths = snappedCombPaths.mapToLower();
+        triangleIndexedA.connects.push({ to: j, edge: overlap, distance });
-    outlinePart = outlinePart.mapToLower()[0];
+        triangleIndexedB.connects.push({ to: i, edge: overlap, distance });
-
+      }
-    if (distanceTo(start, outlinePart[outlinePart.length - 1]) < distanceTo(start, outlinePart[0])) {
-      outlinePart = outlinePart.reverse();
     }
+  }
 
+  return { vertices, convexPolygons };
+}
+
+function findClosestPath(convexPolygons, start, end, visited = [], path = []) {
+  if (start === end) return [];
+
+  visited = [...visited, start];
+
+  const { connects } = convexPolygons[start];
+
+  const finish = connects.find(({ to }) => to === end);
+  if (finish) return [...path, finish];
+
+  const posibilities = [];
+  for (const connect of connects) {
+    if (visited.includes(connect.to)) continue;
+
+    const posibility = findClosestPath(convexPolygons, connect.to, end, visited, [...path, connect]);
+    if (posibility) posibilities.push(posibility);
+  }
+
+  if (posibilities.length === 0) {
+    return null;
+  } else if (posibilities.length === 1) {
+    return posibilities[0];
+  } else if (posibilities.length > 1) {
     const distanceMap = new WeakMap();
-
+    for (const posibility of posibilities) {
-    for (let i = 0; i < snappedCombPaths.length; i ++) {
+      const distance = posibility.reduce((totalDistance, connect) => totalDistance + connect.distance, 0);
-      const snappedCombPath = snappedCombPaths[i];
+      distanceMap.set(posibility, distance);
-
-      const distanceStart = distanceTo(start, snappedCombPath[0]);
-      const distanceEnd = distanceTo(start, snappedCombPath[snappedCombPath.length - 1]);
-
-      if (distanceStart < distanceEnd) {
-        distanceMap.set(snappedCombPath, distanceStart);
-      } else {
-        snappedCombPath.reverse();
-        distanceMap.set(snappedCombPath, distanceEnd);
-      }
-    }
-    snappedCombPaths.sort((a, b) => distanceMap.get(a) - distanceMap.get(b));
-
-    const firstPath = snappedCombPaths[0];
-    const lastPath = snappedCombPaths[snappedCombPaths.length - 1];
-
-    if (snappedCombPaths.length === 0) {
-      snappedCombPaths.push([start], [end]);
-    } else if (distanceTo(firstPath[0], start) > 1.0) {
-      snappedCombPaths.unshift([start]);
-    } else if (distanceTo(lastPath[lastPath.length - 1], end) > 1.0) {
-      snappedCombPaths.push([end]);
     }
 
-    if (snappedCombPaths.length === 1) {
+    return posibilities.sort((a, b) => distanceMap.get(a) - distanceMap.get(b))[0];
-      continue;
-    }
-
-    const startPath = snappedCombPaths[0];
-    const startPoint = startPath[startPath.length - 1];
-
-    const endPath = snappedCombPaths[snappedCombPaths.length - 1];
-    const endPoint = endPath[0];
-
-    const lineIndexStart = findClosestLineOnPath(outlinePart, startPoint);
-    const lineIndexEnd = findClosestLineOnPath(outlinePart, endPoint);
-
-    const path = [];
-    if (lineIndexEnd === lineIndexStart) {
-      continue;
-    } else if (lineIndexEnd > lineIndexStart) {
-      if (lineIndexStart + outlinePart.length - lineIndexEnd < lineIndexEnd - lineIndexStart) {
-        for (let i = lineIndexStart + outlinePart.length; i > lineIndexEnd; i --) {
-          path.push(outlinePart[i % outlinePart.length]);
-        }
-      } else {
-        for (let i = lineIndexStart; i < lineIndexEnd; i ++) {
-          path.push(outlinePart[i + 1]);
-        }
-      }
-    } else {
-      if (lineIndexEnd + outlinePart.length - lineIndexStart < lineIndexStart - lineIndexEnd) {
-        for (let i = lineIndexStart; i < lineIndexEnd + outlinePart.length; i ++) {
-          path.push(outlinePart[(i + 1) % outlinePart.length]);
-        }
-      } else {
-        for (let i = lineIndexStart; i > lineIndexEnd; i --) {
-          path.push(outlinePart[i]);
-        }
-      }
-    }
-
-    combPath = new Shape([[...startPath, ...path, ...endPath]], false, true, false, true);
   }
-
-  return combPath.mapToLower()[0];
 }
 
-function findClosestLineOnPath(path, point) {
+// const parse = string => parseFloat(string);
-  let distance = Infinity;
+// function findClosestPath(map, start, end) {
-  let lineIndex;
+//   // dijkstra's algorithm
+//   const costs = { [start]: 0 };
+//   const open = { [0]: [start] };
+//   const predecessors = {};
+//
+//   while (open) {
+//     const keys = Object.keys(open).map(parse);
+//     if (keys.length === 0) break;
+//     keys.sort();
+//
+//     const [key] = keys;
+//     const bucket = open[key];
+//     const node = bucket.shift();
+//     const currentCost = key;
+//     const { connects } = map[node];
+//
+//     if (!bucket.length) delete open[key];
+//
+//     for (const { distance, to } of connects) {
+//       const totalCost = distance + currentCost;
+//       const vertexCost = costs[to];
+//
+//       if ((typeof vertexCost === 'undefined') || (vertexCost > totalCost)) {
+//         costs[to] = totalCost;
+//
+//         if (!open[totalCost]) open[totalCost] = [];
+//         open[totalCost].push(to);
+//
+//         predecessors[to] = node;
+//       }
+//     }
+//   }
+//
+//   if (typeof costs[end] === 'undefined') return null;
+//
+//   const nodes = [];
+//   let node = end;
+//   while (typeof node !== 'undefined') {
+//     nodes.push(node);
+//     node = predecessors[node];
+//   }
+//   nodes.reverse();
+//
+//   const path = [];
+//   for (let i = 1; i < nodes.length; i ++) {
+//     const from = nodes[i - 1];
+//     const to = nodes[i];
+//
+//     const connection = map[from].connects.find(connect => connect.to === to);
+//     path.push(connection);
+//   }
+//
+//   return path;
+// }
 
-  for (let i = 0; i < path.length; i ++) {
+function containLineInPath(path, start, end, vertices) {
-    const pointA = path[i];
+  const line = [start];
-    const pointB = path[(i + 1) % path.length];
 
-    const tempClosestPoint = findClosestPointOnLine(pointA, pointB, point);
+  for (const { edge: [indexA, indexB] } of path) {
-    const tempDistance = distanceTo(tempClosestPoint, point);
+    const vertexA = vertices[indexA];
+    const vertexB = vertices[indexB];
 
-    if (tempDistance < distance) {
+    const intersection = lineIntersection(start, end, vertexA, vertexB);
-      distance = tempDistance;
+    if (!intersection) {
-      lineIndex = i;
+      const lastPoint = line[line.length - 1];
+      const distanceA = distanceTo(lastPoint, vertexA) + distanceTo(vertexA, end);
+      const distanceB = distanceTo(lastPoint, vertexB) + distanceTo(vertexB, end);
+
+      line.push(distanceA < distanceB ? vertexA : vertexB);
     }
   }
 
-  return lineIndex;
+  line.push(end);
-}
+  return line;
-
-function findClosestPointOnLine(a, b, c) {
-  const b_ = subtract(b, a);
-  const c_ = subtract(c, a);
-
-  const lambda = dot(normalize(b_), c_) / length(b_);
-
-  if (lambda >= 1) {
-    return b;
-  } else if (lambda > 0) {
-    return add(a, scale(b_, lambda));
-  } else {
-    return a;
-  }
 }

src/sliceActions/slice.js

@@ -11,7 +11,7 @@ import shapesToSlices from './shapesToSlices.js';
 import slicesToGCode from './slicesToGCode.js';
 import applyPrecision from './applyPrecision.js';
 import { hslToRgb } from './helpers/color.js';
-// // import removePrecision from './removePrecision.js';
+import removePrecision from './removePrecision.js';
 
 export default function slice(settings, geometry, openObjectIndexes, constructLinePreview, onProgress) {
   const total = 11;
@@ -48,7 +48,7 @@ export default function slice(settings, geometry, openObjectIndexes, constructLi
   updateProgress('Optimizing paths');
   optimizePaths(slices, settings);
 
-  // removePrecision(slices);
+  removePrecision(slices);
 
   updateProgress('Constructing gcode');
   const gcode = slicesToGCode(slices, settings);

src/sliceActions/slicesToGCode.js

@@ -52,7 +52,7 @@ export default function slicesToGCode(slices, settings) {
       const part = slice.parts[i];
 
       if (part.closed) {
-        const outline = part.shell[0];
+        const outline = part.shell[0].mapToLower();
 
         for (let i = 0; i < part.shell.length; i ++) {
           const shell = part.shell[i];
@@ -72,7 +72,8 @@ export default function slicesToGCode(slices, settings) {
     }
 
     if (typeof slice.support !== 'undefined') {
-      pathToGCode(slice.supportOutline, combing, gcode, slice.support, true, true, z, profiles.support);
+      const supportOutline = slice.supportOutline.mapToLower();
+      pathToGCode(supportOutline, combing, gcode, slice.support, true, true, z, profiles.support);
     }
   }
 
@@ -95,7 +96,7 @@ function pathToGCode(outline, combing, gcode, shape, retract, unRetract, z, prof
 
       if (i === 0) {
         if (combing) {
-          const combPath = comb(outline, divide(gcode._nozzlePosition, PRECISION), point);
+          const combPath = comb(outline, gcode._nozzlePosition, point);
           for (let i = 0; i < combPath.length; i ++) {
             const combPoint = combPath[i];
             gcode.moveTo(combPoint.x, combPoint.y, z, travelProfile);