From d3af71bc2271bc316e6f37600487957cdac7c1f7 Mon Sep 17 00:00:00 2001
From: casperlamboo <casperlamboo@gmail.com>
Date: Tue, 4 Aug 2015 09:54:02 +0200
Subject: [PATCH] fixed https://github.com/Doodle3D/Doodle3D-Slicer/issues/12

fixed https://github.com/Doodle3D/Doodle3D-Slicer/issues/12
---
 src/slice.js  | 24 ++++++++++++++++++++++++
 src/slicer.js |  2 ++
 2 files changed, 26 insertions(+)

diff --git a/src/slice.js b/src/slice.js
index 625dff3..cc6eb33 100644
--- a/src/slice.js
+++ b/src/slice.js
@@ -5,6 +5,30 @@ export default class {
 		this.parts = [];
 	}
 
+	removeSelfIntersect () {
+		for (var i = 0; i < this.parts.length; i ++) {
+			var part1 = this.parts[i].intersect;
+
+			if (!part1.closed) {
+				continue;
+			}
+
+			for (var j = i + 1; j < this.parts.length; j ++) {
+				var part2 = this.parts[j].intersect;
+
+				if (!part2.closed) {
+					continue;
+				}
+
+				if (part2.intersect(part1).length > 0) {
+					this.parts[i].intersect = part1.union(part2);
+
+					this.parts.splice(j, 1);
+				}
+			}
+		}
+	}
+
 	optimizePaths (start) {
 		if (this.brim !== undefined && this.brim.length > 0) {
 			this.brim = this.brim.optimizePath(start);
diff --git a/src/slicer.js b/src/slicer.js
index 9baef42..869f7bd 100644
--- a/src/slicer.js
+++ b/src/slicer.js
@@ -353,6 +353,8 @@ export default class {
 				}
 			}
 
+			slice.removeSelfIntersect();
+
 			slices.push(slice);
 		}