Merge branch 'layer-part-test'

build/d3d.js

@@ -568,140 +568,135 @@ D3D.Printer.prototype.subsituteVariables = function (gcode) {
 *
 ******************************************************/
 
-D3D.Path = function (path, closed) {
+D3D.Paths = function (paths, closed) {
 	"use strict";
 
-	this.path = path || [];
+	Array.call(this);
+
+	this.setPaths(paths || []);
+
 	this.closed = (closed !== undefined) ? closed : true;
 };
-D3D.Path.prototype.setPath = function (path) {
+D3D.Paths.prototype = Object.create(Array.prototype);
+D3D.Paths.prototype.setPaths = function (paths) {
 	"use strict";
 
-	this.path = path;
+	for (var i = 0; i < paths.length; i ++) {
+		var path = paths[i];
+		this.push(path);
+	}
 
 	return this;
 };
-D3D.Path.prototype.union = function (path) {
+D3D.Paths.prototype.clip = function (path, type) {
 	"use strict";
 
 	var solution = new ClipperLib.Paths();
 
 	var clipper = new ClipperLib.Clipper();
-	clipper.AddPaths(this.path, ClipperLib.PolyType.ptSubject, this.closed);
+	clipper.AddPaths(this, ClipperLib.PolyType.ptSubject, this.closed);
-	clipper.AddPaths(path.path, ClipperLib.PolyType.ptClip, path.closed);
+	clipper.AddPaths(path, ClipperLib.PolyType.ptClip, path.closed);
-	clipper.Execute(ClipperLib.ClipType.ctUnion, solution);
+	clipper.Execute(type, solution);
 
-	return new D3D.Path(solution, this.closed);
+	return new D3D.Paths(solution);
 };
-D3D.Path.prototype.difference = function (path) {
+D3D.Paths.prototype.union = function (path) {
 	"use strict";
 
-	var solution = new ClipperLib.Paths();
+	return this.clip(path, ClipperLib.ClipType.ctUnion);
-
-	var clipper = new ClipperLib.Clipper();
-	clipper.AddPaths(this.path, ClipperLib.PolyType.ptSubject, this.closed);
-	clipper.AddPaths(path.path, ClipperLib.PolyType.ptClip, path.closed);
-	clipper.Execute(ClipperLib.ClipType.ctDifference, solution);
-
-	return new D3D.Path(solution, this.closed);
 };
-D3D.Path.prototype.intersect = function (path) {
+D3D.Paths.prototype.difference = function (path) {
 	"use strict";
 
-	var solution = new ClipperLib.Paths();
+	return this.clip(path, ClipperLib.ClipType.ctDifference);
-
-	var clipper = new ClipperLib.Clipper();
-	clipper.AddPaths(this.path, ClipperLib.PolyType.ptSubject, this.closed);
-	clipper.AddPaths(path.path, ClipperLib.PolyType.ptClip, path.closed);
-	clipper.Execute(ClipperLib.ClipType.ctIntersection, solution);
-
-	return new D3D.Path(solution, this.closed);
 };
-D3D.Path.prototype.xor = function () {
+D3D.Paths.prototype.intersect = function (path) {
 	"use strict";
 
-	var solution = new ClipperLib.Paths();
+	return this.clip(path, ClipperLib.ClipType.ctIntersection);
-
-	var clipper = new ClipperLib.Clipper();
-	clipper.AddPaths(this.path, ClipperLib.PolyType.ptSubject, this.closed);
-	clipper.AddPaths(path.path, ClipperLib.PolyType.ptClip, path.closed);
-	clipper.Execute(ClipperLib.ClipType.ctXor, solution);
-
-	return new D3D.Path(solution, this.closed);
 };
-D3D.Path.prototype.offset = function (offset) {
+D3D.Paths.prototype.xor = function () {
+	"use strict";
+
+	return this.clip(path, ClipperLib.ClipType.ctXor);
+};
+D3D.Paths.prototype.offset = function (offset) {
 	"use strict";
 
 	var solution = new ClipperLib.Paths();
 	var co = new ClipperLib.ClipperOffset(1, 1);
-	co.AddPaths(this.path, ClipperLib.JoinType.jtRound, ClipperLib.EndType.etClosedPolygon);
+	co.AddPaths(this, ClipperLib.JoinType.jtRound, ClipperLib.EndType.etClosedPolygon);
 	co.Execute(solution, offset);
 
-	return new D3D.Path(solution, this.closed);
+	return new D3D.Paths(solution);
 };
-D3D.Path.prototype.scaleUp = function (factor) {
+D3D.Paths.prototype.scaleUp = function (factor) {
 	"use strict";
 
-	var path = ClipperLib.JS.ScaleUpPaths(this.path, factor);
+	var path = ClipperLib.JS.ScaleUpPaths(this, factor);
 
 	return this;
 };
-D3D.Path.prototype.scaleDown = function (factor) {
+D3D.Paths.prototype.scaleDown = function (factor) {
 	"use strict";
 
-	var path = ClipperLib.JS.ScaleDownPaths(this.path, factor);
+	var path = ClipperLib.JS.ScaleDownPaths(this, factor);
 
 	return this;
 };
-D3D.Path.prototype.tresholdArea = function (minArea) {
+D3D.Paths.prototype.tresholdArea = function (minArea) {
 	"use strict";
 
-	for (var i = 0; i < this.path.length; i ++) {
+	for (var i = 0; i < this.length; i ++) {
-		var shape = this.path[i];
+		var shape = this[i];
 
 		var area = ClipperLib.Clipper.Area(shape);
 
 		if (area < minArea) {
-			this.path.splice(i, 1);
+			this.splice(i, 1);
 			i --;
 		}
 	}
 	
 	return areas;
 };
-D3D.Path.prototype.area = function () {
+D3D.Paths.prototype.area = function () {
 	"use strict";
 
-	var areas = [];
+	return ClipperLib.Clipper.Area(this);
+};
+D3D.Paths.prototype.join = function (path) {
+	"use strict";
 
-	for (var i = 0; i < this.path.length; i ++) {
+	for (var i = 0; i < path.length; i ++) {
-		var shape = this.path[i];
+		this.push(path[i]);
-
-		areas.push(ClipperLib.Clipper.Area(shape))
 	}
 
-	return areas;
+	return this;
 };
-D3D.Path.prototype.join = function (path) {
+D3D.Paths.prototype.clone = function () {
 	"use strict";
 
-	this.path = this.path.concat(path.path);
+	return new D3D.Paths(ClipperLib.JS.Clone(this), this.closed);
+};
+D3D.Paths.prototype.bounds = function () {
+	"use strict";
+
+	return ClipperLib.Clipper.GetBounds(this);
+};
+D3D.Paths.prototype.reverse = function () {
+	"use strict";
+
+	ClipperLib.Clipper.ReversePaths(this);
 
 	return this;
-}
+};
-D3D.Path.prototype.clone = function () {
+D3D.Paths.prototype.draw = function (context, color) {
-	"use strict";
-
-	var path = ClipperLib.JS.Clone(this.path);
-
-	return new D3D.Path(path, this.closed);
-}
-D3D.Path.prototype.draw = function (context, color) {
 	"use strict";
 
 	context.strokeStyle = color;
-	for (var i = 0; i < this.path.length; i ++) {
+	for (var i = 0; i < this.length; i ++) {
-		var shape = this.path[i];
+		var shape = this[i];
 
 		context.beginPath();
 		var length = this.closed ? (shape.length + 1) : shape.length;
@@ -738,12 +733,11 @@ D3D.Slicer.prototype.setMesh = function (mesh) {
 	mesh.updateMatrix();
 
 	var geometry = mesh.geometry.clone();
-	geometry.mergeVertices();
-	geometry.applyMatrix(mesh.matrix);
-
 	if (geometry instanceof THREE.BufferGeometry) {
 		geometry = new THREE.Geometry().fromBufferGeometry(geometry);
 	}
+	geometry.mergeVertices();
+	geometry.applyMatrix(mesh.matrix);
 
 	this.geometry = geometry;
 
@@ -770,7 +764,8 @@ D3D.Slicer.prototype.createLines = function () {
 			self.lines.push({
 				line: new THREE.Line3(self.geometry.vertices[a], self.geometry.vertices[b]), 
 				connects: [], 
-				normals: []
+				normals: [],
+				ignore: 0
 			});
 		}
 
@@ -779,6 +774,8 @@ D3D.Slicer.prototype.createLines = function () {
 
 	for (var i = 0; i < this.geometry.faces.length; i ++) {
 		var face = this.geometry.faces[i];
+
+		//if (face.normal.y !== 1 && face.normal.y !== -1) {
 			var normal = new THREE.Vector2().set(face.normal.x, face.normal.z).normalize();
 
 			//check for only adding unique lines
@@ -795,6 +792,7 @@ D3D.Slicer.prototype.createLines = function () {
 			this.lines[a].normals.push(normal);
 			this.lines[b].normals.push(normal);
 			this.lines[c].normals.push(normal);
+		//}
 	}
 };
 D3D.Slicer.prototype.slice = function (height, step) {
@@ -820,7 +818,7 @@ D3D.Slicer.prototype.slice = function (height, step) {
 
 	var slices = [];
 
-	for (var layer = 1; layer < layersIntersections.length; layer ++) {
+	for (var layer = 1; layer < layersIntersections.length-1; layer ++) {
 		var layerIntersections = layersIntersections[layer];
 		var y = layer*step;
 
@@ -837,7 +835,7 @@ D3D.Slicer.prototype.slice = function (height, step) {
 		}
 
 		var done = [];
-		var slice = [];
+		var slice = new D3D.Paths([], true);
 		for (var i = 0; i < layerIntersections.length; i ++) {
 			var index = layerIntersections[i];
 
@@ -898,15 +896,34 @@ D3D.Slicer.prototype.slice = function (height, step) {
 
 				//think this check is not nescesary, always higher as 0
 				if (shape.length > 0) {
-					slice.push(shape);
+					slice.push(new D3D.Paths([shape]));
 				}
 			}
 		}
 
+		var layerParts = [];
+
+		for (var i = 0; i < slice.length; i ++) {
+			var layerPart1 = slice[i];
+			var merge = false;
+
+			for (var j = 0; j < layerParts.length; j ++) {
+				var layerPart2 = layerParts[j];
+
+				if (layerPart2.intersect(layerPart1).length > 0) {
+					layerPart2.join(layerPart1);
+					merge = true;
+					break;
+				}
+			}
+			if (!merge) {
+				layerParts.push(layerPart1);
+			}
+		}
+
 		//stop when ther are no intersects
-		if (slice.length > 0) {
+		if (layerParts.length > 0) {
-			slices.push(new D3D.Path(slice, true));
+			slices.push(layerParts);
-			//slices.push(slice);
 		}
 		else {
 			break;
@@ -935,10 +952,33 @@ D3D.Slicer.prototype.slicesToData = function (slices, printer) {
 	for (var layer = 0; layer < slices.length; layer ++) {
 		var slice = slices[layer];
 		
-		var outerLayer = slice.clone();
+		var layerData = [];
+		data.push(layerData);
+		
+		var downSkin = new D3D.Paths();
+		if (layer - skinCount >= 0) {
+			var downLayer = slices[layer - skinCount];
+			for (var i = 0; i < downLayer.length; i ++) {
+				downSkin.join(downLayer[i]);
+			}
+		}
+		var upSkin = new D3D.Paths();
+		if (layer + skinCount < slices.length) {
+			var downLayer = slices[layer + skinCount];
+			for (var i = 0; i < downLayer.length; i ++) {
+				upSkin.join(downLayer[i]);
+			}
+		}
+		var surroundingLayer = upSkin.intersect(downSkin).clone().scaleUp(scale);
+		var sliceData = [];
+
+		for (var i = 0; i < slice.length; i ++) {
+			var part = slice[i];
+
+			var outerLayer = part.clone();
 			outerLayer.scaleUp(scale);
 
-		var insets = new D3D.Path();
+			var insets = new D3D.Paths();
 			for (var offset = wallThickness; offset <= shellThickness; offset += wallThickness) {
 				var inset = outerLayer.offset(-offset);
 
@@ -947,32 +987,31 @@ D3D.Slicer.prototype.slicesToData = function (slices, printer) {
 
 			var fillArea = (inset || outerLayer).offset(-wallThickness/2);
 
-		var downFill = (layer - skinCount >= 0) ? slices[layer - skinCount] : new D3D.Path();
+			var highFillArea = fillArea.difference(surroundingLayer);
-		var upFill = (layer + skinCount < slices.length) ? slices[layer + skinCount] : new D3D.Path();
-		var highFillArea = fillArea.difference(downFill.intersect(upFill).scaleUp(scale));
 
 			var lowFillArea = fillArea.difference(highFillArea);
 
-		var fill = new D3D.Path([], false);
+			var fill = new D3D.Paths([]);
+
 			fill.join(lowFillTemplate.intersect(lowFillArea));
-		if (highFillArea.path.length > 0) {
+
 			var highFillTemplate = this.getFillTemplate(dimensionsZ, wallThickness, (layer % 2 === 0), (layer % 2 === 1));
 			fill.join(highFillTemplate.intersect(highFillArea));
-		}
 
-		data.push({
+			layerData.push({
 				outerLayer: outerLayer.scaleDown(scale),
-			insets: insets.scaleDown(scale), 
+				fill: fill.scaleDown(scale),
-			fill: fill.scaleDown(scale)
+				insets: insets.scaleDown(scale)
 			});
 		}
+	}
 
 	return data;
 };
 D3D.Slicer.prototype.getFillTemplate = function (dimension, size, even, uneven) {
 	"use strict";
 
-	var paths = [];
+	var paths = new D3D.Paths([], false);
 
 	if (even) {
 		for (var length = 0; length <= dimension; length += size) {
@@ -986,7 +1025,7 @@ D3D.Slicer.prototype.getFillTemplate = function (dimension, size, even, uneven)
 	}
 	
 	//return paths;
-	return new D3D.Path(paths, false);
+	return paths;
 };
 D3D.Slicer.prototype.dataToGcode = function (data, printer) {
 	"use strict";
@@ -1008,13 +1047,15 @@ D3D.Slicer.prototype.dataToGcode = function (data, printer) {
 	function sliceToGcode (slice) {
 		var gcode = [];
 
-		for (var i = 0; i < slice.path.length; i ++) {
+		for (var i = 0; i < slice.length; i ++) {
-			var shape = slice.path[i];
+			var shape = slice[i];
 
 			var previousPoint;
 
-			for (var j = 0; j < shape.length; j ++) {
+			var length = slice.closed ? (shape.length + 1) : shape.length;
-				var point = shape[j];
+
+			for (var j = 0; j < length; j ++) {
+				var point = shape[j % shape.length];
 
 				if (j === 0) {
 					//TODO
@@ -1082,9 +1123,13 @@ D3D.Slicer.prototype.dataToGcode = function (data, printer) {
 
 		var z = ((layer + 1) * layerHeight).toFixed(3);
 
-		gcode = gcode.concat(sliceToGcode(slice.outerLayer));
+		for (var i = 0; i < slice.length; i ++) {
-		gcode = gcode.concat(sliceToGcode(slice.insets));
+			var layerPart = slice[i];
-		gcode = gcode.concat(sliceToGcode(slice.fill));
+
+			gcode = gcode.concat(sliceToGcode(layerPart.outerLayer));
+			gcode = gcode.concat(sliceToGcode(layerPart.insets));
+			gcode = gcode.concat(sliceToGcode(layerPart.fill));
+		}
 	}
 
 	gcode = gcode.concat(printer.getEndCode());
@@ -1106,13 +1151,16 @@ D3D.Slicer.prototype.drawPaths = function (printer, min, max) {
 	canvas.height = 400;
 	var context = canvas.getContext("2d");
 
-
 	for (var layer = min; layer < max; layer ++) {
 		var slice = data[layer % data.length];
 
-		slice.insets.draw(context, "blue");
+		for (var i = 0; i < slice.length; i ++) {
-		slice.outerLayer.draw(context, "green");
+			var layerPart = slice[i];
-		slice.fill.draw(context, "red");
+
+			layerPart.insets.draw(context, "blue");
+			layerPart.outerLayer.draw(context, "green");
+			layerPart.fill.draw(context, "red");
+		}
 	}
 
 	return canvas;

gulpfile.js

@@ -10,7 +10,7 @@ var files = [
 	"src/utils.js", 
 	"src/box.js", 
 	"src/printer.js", 
-	"src/path.js", 
+	"src/paths.js", 
 	"src/slicer.js"
 ];
 

library/clipper.js

@@ -2876,8 +2876,8 @@
   };
   ClipperLib.ClipperBase.prototype.AddPaths = function (ppg, polyType, closed)
   {
-    //  console.log("-------------------------------------------");
+    //  console.warn("-------------------------------------------");
-    //  console.log(JSON.stringify(ppg));
+    //  console.warn(JSON.stringify(ppg));
     var result = false;
     for (var i = 0, ilen = ppg.length; i < ilen; ++i)
       if (this.AddPath(ppg[i], polyType, closed))
@@ -3185,7 +3185,7 @@
         if (this.m_Scanbeam === null)
           break;
         var topY = this.PopScanbeam();
-        //console.log("botY:" + botY + ", topY:" + topY);
+        //console.warn("botY:" + botY + ", topY:" + topY);
         if (!this.ProcessIntersections(botY, topY))
           return false;
         this.ProcessEdgesAtTopOfScanbeam(topY);
@@ -4747,7 +4747,7 @@
       return;
     //prepare for sorting ...
     var e = this.m_ActiveEdges;
-    //console.log(JSON.stringify(JSON.decycle( e )));
+    //console.warn(JSON.stringify(JSON.decycle( e )));
     this.m_SortedEdges = e;
     while (e !== null)
     {
@@ -4766,13 +4766,13 @@
       {
         var eNext = e.NextInSEL;
         var pt = new ClipperLib.IntPoint();
-        //console.log("e.Curr.X: " + e.Curr.X + " eNext.Curr.X" + eNext.Curr.X);
+        //console.warn("e.Curr.X: " + e.Curr.X + " eNext.Curr.X" + eNext.Curr.X);
         if (e.Curr.X > eNext.Curr.X)
         {
           if (!this.IntersectPoint(e, eNext, pt) && e.Curr.X > eNext.Curr.X + 1)
           {
-            //console.log("e.Curr.X: "+JSON.stringify(JSON.decycle( e.Curr.X )));
+            //console.warn("e.Curr.X: "+JSON.stringify(JSON.decycle( e.Curr.X )));
-            //console.log("eNext.Curr.X+1: "+JSON.stringify(JSON.decycle( eNext.Curr.X+1)));
+            //console.warn("eNext.Curr.X+1: "+JSON.stringify(JSON.decycle( eNext.Curr.X+1)));
             ClipperLib.Error("Intersection error");
           }
           if (pt.Y > botY)
@@ -4884,8 +4884,8 @@
   else ClipperLib.Clipper.Round = R2; // eg. browser.chrome || browser.firefox || browser.opera
   ClipperLib.Clipper.TopX = function (edge, currentY)
   {
-    //if (edge.Bot == edge.Curr) alert ("edge.Bot = edge.Curr");
+    //if (edge.Bot == edge.Curr) console.warn ("edge.Bot = edge.Curr");
-    //if (edge.Bot == edge.Top) alert ("edge.Bot = edge.Top");
+    //if (edge.Bot == edge.Top) console.warn ("edge.Bot = edge.Top");
     if (currentY == edge.Top.Y)
       return edge.Top.X;
     return edge.Bot.X + ClipperLib.Clipper.Round(edge.Dx * (currentY - edge.Bot.Y));
@@ -6469,7 +6469,7 @@
         if (solution.length > 0)
           solution.splice(0, 1);
       }
-      //console.log(JSON.stringify(solution));
+      //console.warn(JSON.stringify(solution));
     }
     else // function (polytree, delta)
     {
@@ -6596,7 +6596,7 @@
     }
     catch (err)
     {
-      alert(err.message);
+      console.warn(err.message);
     }
   };
   // ---------------------------------

models/diamond.stl

@@ -0,0 +1,506 @@
+solid OpenSCAD_Model
+  facet normal 0 0 0
+    outer loop
+      vertex 24 0 45.03
+      vertex 12 0 54.03
+      vertex 20.7846 -12 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 8.48528 8.48528 54.03
+      vertex 12 0 54.03
+      vertex 20.7846 12 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -12 -20.7846 45.03
+      vertex -20.7846 -12 45
+      vertex -12 -20.7846 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -12 1.46953e-015 54.03
+      vertex 8.48528 8.48528 54.03
+      vertex 7.34764e-016 12 54.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 12 0 54.03
+      vertex -8.48528 -8.48528 54.03
+      vertex 8.48528 -8.48528 54.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 12 0 54.03
+      vertex 8.48528 -8.48528 54.03
+      vertex 20.7846 -12 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 12 0 54.03
+      vertex 8.48528 8.48528 54.03
+      vertex -8.48528 -8.48528 54.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 7.34764e-016 12 54.03
+      vertex 1.46953e-015 24 45.03
+      vertex -12 20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 12 20.7846 45.03
+      vertex 20.7846 12 45
+      vertex 12 20.7846 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 7.34764e-016 12 54.03
+      vertex 8.48528 8.48528 54.03
+      vertex 12 20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -0.15 -0.259808 15
+      vertex 0.15 0.259808 15
+      vertex 0.15 -0.259808 15
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 20.7846 -12 45.03
+      vertex 12 -20.7846 45
+      vertex 20.7846 -12 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -12 1.46953e-015 54.03
+      vertex -20.7846 12 45.03
+      vertex -24 2.93906e-015 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -24 2.93906e-015 45.03
+      vertex -20.7846 -12 45
+      vertex -20.7846 -12 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 8.48528 8.48528 54.03
+      vertex 20.7846 12 45.03
+      vertex 12 20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -20.7846 -12 45
+      vertex -12 -20.7846 45.03
+      vertex -20.7846 -12 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -0.15 0.259808 15
+      vertex -12 20.7846 45
+      vertex 1.46953e-015 24 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 0.15 0.259808 15
+      vertex 20.7846 12 45
+      vertex 0.3 0 15
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -2.20429e-015 -12 54.03
+      vertex -4.40858e-015 -24 45.03
+      vertex 12 -20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -2.20429e-015 -12 54.03
+      vertex -8.48528 -8.48528 54.03
+      vertex -12 -20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -24 2.93906e-015 45
+      vertex -20.7846 12 45.03
+      vertex -20.7846 12 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -0.15 0.259808 15
+      vertex -0.15 -0.259808 15
+      vertex -0.3 3.67382e-017 15
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 20.7846 12 45
+      vertex 20.7846 12 45.03
+      vertex 24 0 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 20.7846 12 45.03
+      vertex 12 0 54.03
+      vertex 24 0 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -8.48528 -8.48528 54.03
+      vertex 8.48528 8.48528 54.03
+      vertex -12 1.46953e-015 54.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 20.7846 12 45.03
+      vertex 20.7846 12 45
+      vertex 12 20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 1.46953e-015 24 45.03
+      vertex -12 20.7846 45
+      vertex -12 20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 7.34764e-016 12 54.03
+      vertex -12 20.7846 45.03
+      vertex -8.48528 8.48528 54.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 20.7846 12 45
+      vertex 0.15 0.259808 15
+      vertex 12 20.7846 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 1.46953e-015 24 45.03
+      vertex 7.34764e-016 12 54.03
+      vertex 12 20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -4.40858e-015 -24 45.03
+      vertex 12 -20.7846 45
+      vertex 12 -20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 8.48528 -8.48528 54.03
+      vertex -8.48528 -8.48528 54.03
+      vertex -2.20429e-015 -12 54.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -12 20.7846 45
+      vertex 1.46953e-015 24 45.03
+      vertex 1.46953e-015 24 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -4.40858e-015 -24 45.03
+      vertex -2.20429e-015 -12 54.03
+      vertex -12 -20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -0.15 -0.259808 15
+      vertex -20.7846 -12 45
+      vertex -0.3 3.67382e-017 15
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -0.15 0.259808 15
+      vertex 0.15 0.259808 15
+      vertex -0.15 -0.259808 15
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 0.15 -0.259808 15
+      vertex 0.3 0 15
+      vertex 20.7846 -12 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -20.7846 -12 45
+      vertex -0.15 -0.259808 15
+      vertex -12 -20.7846 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 12 -20.7846 45
+      vertex 20.7846 -12 45.03
+      vertex 12 -20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 0.15 -0.259808 15
+      vertex 0.15 0.259808 15
+      vertex 0.3 0 15
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -24 2.93906e-015 45.03
+      vertex -20.7846 12 45.03
+      vertex -24 2.93906e-015 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -12 1.46953e-015 54.03
+      vertex -24 2.93906e-015 45.03
+      vertex -20.7846 -12 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -12 20.7846 45
+      vertex -20.7846 12 45.03
+      vertex -12 20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -12 1.46953e-015 54.03
+      vertex 7.34764e-016 12 54.03
+      vertex -8.48528 8.48528 54.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 1.46953e-015 24 45.03
+      vertex 12 20.7846 45
+      vertex 1.46953e-015 24 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 1.46953e-015 24 45.03
+      vertex 12 20.7846 45.03
+      vertex 12 20.7846 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 20.7846 -12 45.03
+      vertex 8.48528 -8.48528 54.03
+      vertex 12 -20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 8.48528 -8.48528 54.03
+      vertex -2.20429e-015 -12 54.03
+      vertex 12 -20.7846 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 12 20.7846 45
+      vertex 0.15 0.259808 15
+      vertex 1.46953e-015 24 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 0.15 0.259808 15
+      vertex -0.15 0.259808 15
+      vertex 1.46953e-015 24 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 12 -20.7846 45
+      vertex -4.40858e-015 -24 45.03
+      vertex -4.40858e-015 -24 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -4.40858e-015 -24 45.03
+      vertex -12 -20.7846 45.03
+      vertex -12 -20.7846 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -4.40858e-015 -24 45.03
+      vertex -12 -20.7846 45
+      vertex -4.40858e-015 -24 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -12 -20.7846 45
+      vertex -0.15 -0.259808 15
+      vertex -4.40858e-015 -24 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 12 -20.7846 45
+      vertex -4.40858e-015 -24 45
+      vertex 0.15 -0.259808 15
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -4.40858e-015 -24 45
+      vertex -0.15 -0.259808 15
+      vertex 0.15 -0.259808 15
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -0.15 0.259808 15
+      vertex -0.3 3.67382e-017 15
+      vertex -20.7846 12 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -0.3 3.67382e-017 15
+      vertex -24 2.93906e-015 45
+      vertex -20.7846 12 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -12 -20.7846 45.03
+      vertex -8.48528 -8.48528 54.03
+      vertex -20.7846 -12 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -8.48528 -8.48528 54.03
+      vertex -12 1.46953e-015 54.03
+      vertex -20.7846 -12 45.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -12 20.7846 45.03
+      vertex -20.7846 12 45.03
+      vertex -8.48528 8.48528 54.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -20.7846 12 45.03
+      vertex -12 1.46953e-015 54.03
+      vertex -8.48528 8.48528 54.03
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 0.3 0 15
+      vertex 20.7846 12 45
+      vertex 24 0 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 12 -20.7846 45
+      vertex 0.15 -0.259808 15
+      vertex 20.7846 -12 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -0.3 3.67382e-017 15
+      vertex -20.7846 -12 45
+      vertex -24 2.93906e-015 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -20.7846 -12 45
+      vertex -24 2.93906e-015 45.03
+      vertex -24 2.93906e-015 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 20.7846 12 45
+      vertex 24 0 45.03
+      vertex 24 0 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 24 0 45.03
+      vertex 20.7846 -12 45.03
+      vertex 20.7846 -12 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 24 0 45.03
+      vertex 20.7846 -12 45
+      vertex 24 0 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex 20.7846 -12 45
+      vertex 0.3 0 15
+      vertex 24 0 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -20.7846 12 45.03
+      vertex -12 20.7846 45
+      vertex -20.7846 12 45
+    endloop
+  endfacet
+  facet normal 0 0 0
+    outer loop
+      vertex -12 20.7846 45
+      vertex -0.15 0.259808 15
+      vertex -20.7846 12 45
+    endloop
+  endfacet
+endsolid OpenSCAD_Model

slice_test.html

@@ -11,7 +11,7 @@
 <script src="src/utils.js"></script>
 <script src="src/box.js"></script>
 <script src="src/printer.js"></script>
-<script src="src/path.js"></script>
+<script src="src/paths.js"></script>
 <script src="src/slicer.js"></script>
 
 <script src="gcode/testgcode.js"></script>
@@ -115,20 +115,55 @@ mesh.position.z = 100;
 //scene.add(mesh);
 
 var loader = new THREE.STLLoader();
-loader.load("models/cubes.stl", function (geometry) {
+loader.load("models/diamond.stl", function (geometry) {
+	var geometry = new THREE.BoxGeometry(10, 10, 10, 1, 1, 1);
+	//var geometry = new THREE.TorusGeometry(20, 10, 30, 30);
+
+	var geometry = (function () {
+		"use strict";
+
+		var circle = new THREE.Shape();
+		circle.absarc(0, 0, 10, 0, Math.PI*2, false);
+
+		var hole = new THREE.Path();
+		hole.absarc(0, 0, 5, 0, Math.PI*2, true );
+
+		circle.holes.push(hole);
+
+		var matrix = new THREE.Matrix4();
+		matrix.makeRotationX(Math.PI*1.5);
+
+		var geometry = new THREE.ExtrudeGeometry(circle, {
+			amount: 3, 
+			bevelEnabled: false, 
+			steps: 1
+		});
+		geometry.applyMatrix(matrix);
+
+		return geometry;
+	})();
+
 	var mesh = new THREE.Mesh(geometry, material);
 	
 	mesh.position.x = 100;
 	mesh.position.z = 100;
+
+	/*
 	mesh.rotation.x = -Math.PI/2;
 	mesh.scale.x = mesh.scale.y = mesh.scale.z = 3;
 	//mesh is lifted a little bit...
 	mesh.position.y = -0.6552429199218741;
-
+	*/
 	scene.add(mesh);
 
 	var slicer = new D3D.Slicer().setMesh(mesh);
 
+	var canvas = document.getElementById("canvas");
+	var context = canvas.getContext("2d");
+
+	//var img = slicer.drawPaths(printer, 7, 8);
+	//context.drawImage(img, 0, 0);
+
 	gcode = slicer.getGcode(printer);
 });
 

src/path.js

@@ -1,153 +0,0 @@
-/******************************************************
-*
-* Path
-*
-* Abstraction layer for annoying clipper js
-*
-******************************************************/
-
-D3D.Path = function (path, closed) {
-	"use strict";
-
-	this.path = path || [];
-	this.closed = (closed !== undefined) ? closed : true;
-};
-D3D.Path.prototype.setPath = function (path) {
-	"use strict";
-
-	this.path = path;
-
-	return this;
-};
-D3D.Path.prototype.union = function (path) {
-	"use strict";
-
-	var solution = new ClipperLib.Paths();
-
-	var clipper = new ClipperLib.Clipper();
-	clipper.AddPaths(this.path, ClipperLib.PolyType.ptSubject, this.closed);
-	clipper.AddPaths(path.path, ClipperLib.PolyType.ptClip, path.closed);
-	clipper.Execute(ClipperLib.ClipType.ctUnion, solution);
-
-	return new D3D.Path(solution, this.closed);
-};
-D3D.Path.prototype.difference = function (path) {
-	"use strict";
-
-	var solution = new ClipperLib.Paths();
-
-	var clipper = new ClipperLib.Clipper();
-	clipper.AddPaths(this.path, ClipperLib.PolyType.ptSubject, this.closed);
-	clipper.AddPaths(path.path, ClipperLib.PolyType.ptClip, path.closed);
-	clipper.Execute(ClipperLib.ClipType.ctDifference, solution);
-
-	return new D3D.Path(solution, this.closed);
-};
-D3D.Path.prototype.intersect = function (path) {
-	"use strict";
-
-	var solution = new ClipperLib.Paths();
-
-	var clipper = new ClipperLib.Clipper();
-	clipper.AddPaths(this.path, ClipperLib.PolyType.ptSubject, this.closed);
-	clipper.AddPaths(path.path, ClipperLib.PolyType.ptClip, path.closed);
-	clipper.Execute(ClipperLib.ClipType.ctIntersection, solution);
-
-	return new D3D.Path(solution, this.closed);
-};
-D3D.Path.prototype.xor = function () {
-	"use strict";
-
-	var solution = new ClipperLib.Paths();
-
-	var clipper = new ClipperLib.Clipper();
-	clipper.AddPaths(this.path, ClipperLib.PolyType.ptSubject, this.closed);
-	clipper.AddPaths(path.path, ClipperLib.PolyType.ptClip, path.closed);
-	clipper.Execute(ClipperLib.ClipType.ctXor, solution);
-
-	return new D3D.Path(solution, this.closed);
-};
-D3D.Path.prototype.offset = function (offset) {
-	"use strict";
-
-	var solution = new ClipperLib.Paths();
-	var co = new ClipperLib.ClipperOffset(1, 1);
-	co.AddPaths(this.path, ClipperLib.JoinType.jtRound, ClipperLib.EndType.etClosedPolygon);
-	co.Execute(solution, offset);
-
-	return new D3D.Path(solution, this.closed);
-};
-D3D.Path.prototype.scaleUp = function (factor) {
-	"use strict";
-
-	var path = ClipperLib.JS.ScaleUpPaths(this.path, factor);
-
-	return this;
-};
-D3D.Path.prototype.scaleDown = function (factor) {
-	"use strict";
-
-	var path = ClipperLib.JS.ScaleDownPaths(this.path, factor);
-
-	return this;
-};
-D3D.Path.prototype.tresholdArea = function (minArea) {
-	"use strict";
-
-	for (var i = 0; i < this.path.length; i ++) {
-		var shape = this.path[i];
-
-		var area = ClipperLib.Clipper.Area(shape);
-
-		if (area < minArea) {
-			this.path.splice(i, 1);
-			i --;
-		}
-	}
-	
-	return areas;
-};
-D3D.Path.prototype.area = function () {
-	"use strict";
-
-	var areas = [];
-
-	for (var i = 0; i < this.path.length; i ++) {
-		var shape = this.path[i];
-
-		areas.push(ClipperLib.Clipper.Area(shape))
-	}
-	
-	return areas;
-};
-D3D.Path.prototype.join = function (path) {
-	"use strict";
-
-	this.path = this.path.concat(path.path);
-
-	return this;
-}
-D3D.Path.prototype.clone = function () {
-	"use strict";
-
-	var path = ClipperLib.JS.Clone(this.path);
-
-	return new D3D.Path(path, this.closed);
-}
-D3D.Path.prototype.draw = function (context, color) {
-	"use strict";
-
-	context.strokeStyle = color;
-	for (var i = 0; i < this.path.length; i ++) {
-		var shape = this.path[i];
-
-		context.beginPath();
-		var length = this.closed ? (shape.length + 1) : shape.length;
-		for (var j = 0; j < length; j ++) {
-			var point = shape[j % shape.length];
-
-			context.lineTo(point.X*2, point.Y*2);
-		}
-		context.stroke();
-	}
-};

src/paths.js

@@ -0,0 +1,148 @@
+/******************************************************
+*
+* Path
+*
+* Abstraction layer for annoying clipper js
+*
+******************************************************/
+
+D3D.Paths = function (paths, closed) {
+	"use strict";
+
+	Array.call(this);
+
+	this.setPaths(paths || []);
+
+	this.closed = (closed !== undefined) ? closed : true;
+};
+D3D.Paths.prototype = Object.create(Array.prototype);
+D3D.Paths.prototype.setPaths = function (paths) {
+	"use strict";
+
+	for (var i = 0; i < paths.length; i ++) {
+		var path = paths[i];
+		this.push(path);
+	}
+
+	return this;
+};
+D3D.Paths.prototype.clip = function (path, type) {
+	"use strict";
+
+	var solution = new ClipperLib.Paths();
+
+	var clipper = new ClipperLib.Clipper();
+	clipper.AddPaths(this, ClipperLib.PolyType.ptSubject, this.closed);
+	clipper.AddPaths(path, ClipperLib.PolyType.ptClip, path.closed);
+	clipper.Execute(type, solution);
+
+	return new D3D.Paths(solution);
+};
+D3D.Paths.prototype.union = function (path) {
+	"use strict";
+
+	return this.clip(path, ClipperLib.ClipType.ctUnion);
+};
+D3D.Paths.prototype.difference = function (path) {
+	"use strict";
+
+	return this.clip(path, ClipperLib.ClipType.ctDifference);
+};
+D3D.Paths.prototype.intersect = function (path) {
+	"use strict";
+
+	return this.clip(path, ClipperLib.ClipType.ctIntersection);
+};
+D3D.Paths.prototype.xor = function () {
+	"use strict";
+
+	return this.clip(path, ClipperLib.ClipType.ctXor);
+};
+D3D.Paths.prototype.offset = function (offset) {
+	"use strict";
+
+	var solution = new ClipperLib.Paths();
+	var co = new ClipperLib.ClipperOffset(1, 1);
+	co.AddPaths(this, ClipperLib.JoinType.jtRound, ClipperLib.EndType.etClosedPolygon);
+	co.Execute(solution, offset);
+
+	return new D3D.Paths(solution);
+};
+D3D.Paths.prototype.scaleUp = function (factor) {
+	"use strict";
+
+	var path = ClipperLib.JS.ScaleUpPaths(this, factor);
+
+	return this;
+};
+D3D.Paths.prototype.scaleDown = function (factor) {
+	"use strict";
+
+	var path = ClipperLib.JS.ScaleDownPaths(this, factor);
+
+	return this;
+};
+D3D.Paths.prototype.tresholdArea = function (minArea) {
+	"use strict";
+
+	for (var i = 0; i < this.length; i ++) {
+		var shape = this[i];
+
+		var area = ClipperLib.Clipper.Area(shape);
+
+		if (area < minArea) {
+			this.splice(i, 1);
+			i --;
+		}
+	}
+	
+	return areas;
+};
+D3D.Paths.prototype.area = function () {
+	"use strict";
+
+	return ClipperLib.Clipper.Area(this);
+};
+D3D.Paths.prototype.join = function (path) {
+	"use strict";
+
+	for (var i = 0; i < path.length; i ++) {
+		this.push(path[i]);
+	}
+
+	return this;
+};
+D3D.Paths.prototype.clone = function () {
+	"use strict";
+
+	return new D3D.Paths(ClipperLib.JS.Clone(this), this.closed);
+};
+D3D.Paths.prototype.bounds = function () {
+	"use strict";
+
+	return ClipperLib.Clipper.GetBounds(this);
+};
+D3D.Paths.prototype.reverse = function () {
+	"use strict";
+
+	ClipperLib.Clipper.ReversePaths(this);
+
+	return this;
+};
+D3D.Paths.prototype.draw = function (context, color) {
+	"use strict";
+
+	context.strokeStyle = color;
+	for (var i = 0; i < this.length; i ++) {
+		var shape = this[i];
+
+		context.beginPath();
+		var length = this.closed ? (shape.length + 1) : shape.length;
+		for (var j = 0; j < length; j ++) {
+			var point = shape[j % shape.length];
+
+			context.lineTo(point.X*2, point.Y*2);
+		}
+		context.stroke();
+	}
+};

src/slicer.js

@@ -64,6 +64,8 @@ D3D.Slicer.prototype.createLines = function () {
 
 	for (var i = 0; i < this.geometry.faces.length; i ++) {
 		var face = this.geometry.faces[i];
+
+		//if (face.normal.y !== 1 && face.normal.y !== -1) {
 			var normal = new THREE.Vector2().set(face.normal.x, face.normal.z).normalize();
 
 			//check for only adding unique lines
@@ -80,12 +82,7 @@ D3D.Slicer.prototype.createLines = function () {
 			this.lines[a].normals.push(normal);
 			this.lines[b].normals.push(normal);
 			this.lines[c].normals.push(normal);
-
+		//}
-		if (face.normal.y === 1 || face.normal.y === -1) {
-			this.lines[a].ignore ++;
-			this.lines[b].ignore ++;
-			this.lines[c].ignore ++;
-		}
 	}
 };
 D3D.Slicer.prototype.slice = function (height, step) {
@@ -99,7 +96,6 @@ D3D.Slicer.prototype.slice = function (height, step) {
 		var min = Math.ceil(Math.min(line.line.start.y, line.line.end.y) / step);
 		var max = Math.floor(Math.max(line.line.start.y, line.line.end.y) / step);
 
-		if (line.ignore < 2) {
 		for (var layerIndex = min; layerIndex <= max; layerIndex ++) {
 			if (layerIndex >= 0) {
 				if (layersIntersections[layerIndex] === undefined) {
@@ -109,11 +105,10 @@ D3D.Slicer.prototype.slice = function (height, step) {
 			}
 		}
 	}
-	}
 
 	var slices = [];
 
-	for (var layer = 1; layer < layersIntersections.length; layer ++) {
+	for (var layer = 1; layer < layersIntersections.length-1; layer ++) {
 		var layerIntersections = layersIntersections[layer];
 		var y = layer*step;
 
@@ -130,7 +125,7 @@ D3D.Slicer.prototype.slice = function (height, step) {
 		}
 
 		var done = [];
-		var slice = [];
+		var slice = new D3D.Paths([], true);
 		for (var i = 0; i < layerIntersections.length; i ++) {
 			var index = layerIntersections[i];
 
@@ -191,15 +186,34 @@ D3D.Slicer.prototype.slice = function (height, step) {
 
 				//think this check is not nescesary, always higher as 0
 				if (shape.length > 0) {
-					slice.push(shape);
+					slice.push(new D3D.Paths([shape]));
 				}
 			}
 		}
 
+		var layerParts = [];
+
+		for (var i = 0; i < slice.length; i ++) {
+			var layerPart1 = slice[i];
+			var merge = false;
+
+			for (var j = 0; j < layerParts.length; j ++) {
+				var layerPart2 = layerParts[j];
+
+				if (layerPart2.intersect(layerPart1).length > 0) {
+					layerPart2.join(layerPart1);
+					merge = true;
+					break;
+				}
+			}
+			if (!merge) {
+				layerParts.push(layerPart1);
+			}
+		}
+
 		//stop when ther are no intersects
-		if (slice.length > 0) {
+		if (layerParts.length > 0) {
-			slices.push(new D3D.Path(slice, true));
+			slices.push(layerParts);
-			//slices.push(slice);
 		}
 		else {
 			break;
@@ -228,10 +242,33 @@ D3D.Slicer.prototype.slicesToData = function (slices, printer) {
 	for (var layer = 0; layer < slices.length; layer ++) {
 		var slice = slices[layer];
 		
-		var outerLayer = slice.clone();
+		var layerData = [];
+		data.push(layerData);
+		
+		var downSkin = new D3D.Paths();
+		if (layer - skinCount >= 0) {
+			var downLayer = slices[layer - skinCount];
+			for (var i = 0; i < downLayer.length; i ++) {
+				downSkin.join(downLayer[i]);
+			}
+		}
+		var upSkin = new D3D.Paths();
+		if (layer + skinCount < slices.length) {
+			var downLayer = slices[layer + skinCount];
+			for (var i = 0; i < downLayer.length; i ++) {
+				upSkin.join(downLayer[i]);
+			}
+		}
+		var surroundingLayer = upSkin.intersect(downSkin).clone().scaleUp(scale);
+		var sliceData = [];
+
+		for (var i = 0; i < slice.length; i ++) {
+			var part = slice[i];
+
+			var outerLayer = part.clone();
 			outerLayer.scaleUp(scale);
 
-		var insets = new D3D.Path();
+			var insets = new D3D.Paths();
 			for (var offset = wallThickness; offset <= shellThickness; offset += wallThickness) {
 				var inset = outerLayer.offset(-offset);
 
@@ -240,33 +277,31 @@ D3D.Slicer.prototype.slicesToData = function (slices, printer) {
 
 			var fillArea = (inset || outerLayer).offset(-wallThickness/2);
 
-		var downFill = (layer - skinCount >= 0) ? slices[layer - skinCount] : new D3D.Path();
+			var highFillArea = fillArea.difference(surroundingLayer);
-		var upFill = (layer + skinCount < slices.length) ? slices[layer + skinCount] : new D3D.Path();
-		var highFillArea = fillArea.difference(downFill.intersect(upFill).scaleUp(scale));
 
 			var lowFillArea = fillArea.difference(highFillArea);
 
-		var fill = new D3D.Path([], false);
+			var fill = new D3D.Paths([]);
-		fill.join(lowFillTemplate.intersect(lowFillArea));
-		if (highFillArea.path.length > 0) {
-			var highFillTemplate = this.getFillTemplate(dimensionsZ, wallThickness, (layer % 2 === 0), (layer % 2 === 1));
-			var highFillStrokes = highFillArea;
-			fill.join(highFillTemplate.intersect(highFillStrokes));
-		}
 
-		data.push({
+			fill.join(lowFillTemplate.intersect(lowFillArea));
+
+			var highFillTemplate = this.getFillTemplate(dimensionsZ, wallThickness, (layer % 2 === 0), (layer % 2 === 1));
+			fill.join(highFillTemplate.intersect(highFillArea));
+
+			layerData.push({
 				outerLayer: outerLayer.scaleDown(scale),
-			insets: insets.scaleDown(scale), 
+				fill: fill.scaleDown(scale),
-			fill: fill.scaleDown(scale)
+				insets: insets.scaleDown(scale)
 			});
 		}
+	}
 
 	return data;
 };
 D3D.Slicer.prototype.getFillTemplate = function (dimension, size, even, uneven) {
 	"use strict";
 
-	var paths = [];
+	var paths = new D3D.Paths([], false);
 
 	if (even) {
 		for (var length = 0; length <= dimension; length += size) {
@@ -280,7 +315,7 @@ D3D.Slicer.prototype.getFillTemplate = function (dimension, size, even, uneven)
 	}
 	
 	//return paths;
-	return new D3D.Path(paths, false);
+	return paths;
 };
 D3D.Slicer.prototype.dataToGcode = function (data, printer) {
 	"use strict";
@@ -302,13 +337,15 @@ D3D.Slicer.prototype.dataToGcode = function (data, printer) {
 	function sliceToGcode (slice) {
 		var gcode = [];
 
-		for (var i = 0; i < slice.path.length; i ++) {
+		for (var i = 0; i < slice.length; i ++) {
-			var shape = slice.path[i];
+			var shape = slice[i];
 
 			var previousPoint;
 
-			for (var j = 0; j < shape.length; j ++) {
+			var length = slice.closed ? (shape.length + 1) : shape.length;
-				var point = shape[j];
+
+			for (var j = 0; j < length; j ++) {
+				var point = shape[j % shape.length];
 
 				if (j === 0) {
 					//TODO
@@ -376,9 +413,13 @@ D3D.Slicer.prototype.dataToGcode = function (data, printer) {
 
 		var z = ((layer + 1) * layerHeight).toFixed(3);
 
-		gcode = gcode.concat(sliceToGcode(slice.outerLayer));
+		for (var i = 0; i < slice.length; i ++) {
-		gcode = gcode.concat(sliceToGcode(slice.insets));
+			var layerPart = slice[i];
-		gcode = gcode.concat(sliceToGcode(slice.fill));
+
+			gcode = gcode.concat(sliceToGcode(layerPart.outerLayer));
+			gcode = gcode.concat(sliceToGcode(layerPart.insets));
+			gcode = gcode.concat(sliceToGcode(layerPart.fill));
+		}
 	}
 
 	gcode = gcode.concat(printer.getEndCode());
@@ -403,9 +444,13 @@ D3D.Slicer.prototype.drawPaths = function (printer, min, max) {
 	for (var layer = min; layer < max; layer ++) {
 		var slice = data[layer % data.length];
 
-		slice.insets.draw(context, "blue");
+		for (var i = 0; i < slice.length; i ++) {
-		slice.outerLayer.draw(context, "green");
+			var layerPart = slice[i];
-		slice.fill.draw(context, "red");
+
+			layerPart.insets.draw(context, "blue");
+			layerPart.outerLayer.draw(context, "green");
+			layerPart.fill.draw(context, "red");
+		}
 	}
 
 	return canvas;