From f12b3f2e9f6185bb376980cb265359a76df42544 Mon Sep 17 00:00:00 2001
From: Stewart Allen <stewart.allen@gmail.com>
Date: Sun, 20 Jun 2021 18:59:59 -0400
Subject: [PATCH] fix polygon perimeter() and restore gyroid filter

---
 src/geo/polygon.js   | 2 +-
 src/mode/fdm/fill.js | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/geo/polygon.js b/src/geo/polygon.js
index bc87b87b..2096faac 100644
--- a/src/geo/polygon.js
+++ b/src/geo/polygon.js
@@ -1338,7 +1338,7 @@
      * @returns {number} perimeter length (sum of all segment lengths)
      */
     PRO.perimeter = function() {
-        if (this.perim !== 0.0) {
+        if (this.perim) {
             return this.perim;
         }
 
diff --git a/src/mode/fdm/fill.js b/src/mode/fdm/fill.js
index a8a24edc..d6f1fa00 100644
--- a/src/mode/fdm/fill.js
+++ b/src/mode/fdm/fill.js
@@ -140,7 +140,7 @@
             }
         }
         polys = connectOpenPolys(polys);
-        for (let poly of polys) {
+        for (let poly of polys.filter(p => p.perimeter() > 2)) {
             target.newline();
             for (let point of poly.points) {
                 target.emit(point.x, point.y);