From 3b13717d3d8689b519a6cefc14586c6b84cc2c46 Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Sat, 28 Sep 2019 20:34:50 +0800
Subject: [PATCH] refactor

---
 examples/turtle/sierpinski_triangle.scad | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/examples/turtle/sierpinski_triangle.scad b/examples/turtle/sierpinski_triangle.scad
index 2d5c13cf..d8e85550 100644
--- a/examples/turtle/sierpinski_triangle.scad
+++ b/examples/turtle/sierpinski_triangle.scad
@@ -1,5 +1,4 @@
-include <line2d.scad>;
-include <polyline2d.scad>;
+include <hull_polyline2d.scad>;
 include <turtle/t2d.scad>;
 
 side_leng = 100;
@@ -8,7 +7,7 @@ thickness = 0.5;
 
 sierpinski_triangle(
     t2d(point = [0, 0], angle = 0),
-    side_leng, min_leng, thickness, $fn = 12
+    side_leng, min_leng, thickness, $fn = 3
 );
 
 module triangle(t, side_leng, thickness) {    
@@ -18,12 +17,10 @@ module triangle(t, side_leng, thickness) {
         ["forward", side_leng]
     ]);
 
-    polyline2d([
-        t2d(t, "point"),
-        t2d(t2, "point"),
-        t2d(t3, "point"),
-        t2d(t, "point")
-    ], thickness, startingStyle = "CAP_ROUND", endingStyle =  "CAP_ROUND");
+    hull_polyline2d(
+        [for(tu = [t, t2, t3, t]) t2d(tu, "point")], 
+        thickness
+    );
 }
 
 module sierpinski_triangle(t, side_leng, min_leng, thickness) {