From b797f8cbb8bf3a8bbed4f08d3fce1c30b063c744 Mon Sep 17 00:00:00 2001
From: Vitaliy Filippov <vitalif@yourcmc.ru>
Date: Wed, 18 Jun 2014 17:20:14 +0000
Subject: [PATCH] use wedge, add wanhao butterfly (it was a test model in .x3g
 format)

---
 track-attach.scad          | 14 +++++++--
 wanhao-butterfly-grown.svg | 63 ++++++++++++++++++++++++++++++++++++++
 wanhao-butterfly.svg       | 60 ++++++++++++++++++++++++++++++++++++
 3 files changed, 135 insertions(+), 2 deletions(-)
 create mode 100644 wanhao-butterfly-grown.svg
 create mode 100644 wanhao-butterfly.svg

diff --git a/track-attach.scad b/track-attach.scad
index adcdb45..1995636 100644
--- a/track-attach.scad
+++ b/track-attach.scad
@@ -21,10 +21,20 @@ difference() {
       translate([0, 0, -0.6]) cylinder(r=2.4, h=1+0.6*2);
     }
   }
-  translate([-4, -0.5, 8]) cube(size=[8, 1, 4]);
-  translate([-4, 16-0.5, 8]) cube(size=[8, 1, 4]);
+  hull() {
+    translate([4, 0, 8.5]) scale([8, 1, 1]) rotate([-90, 0, 90]) wedge();
+    translate([-4, -0.5, 8.5]) cube(size=[8, 1, 4]);
+  }
+  hull() {
+    translate([4, 16, 8.5]) scale([8, 1, 1]) rotate([-90, 0, 90]) wedge();
+    translate([-4, 16-0.5, 8.5]) cube(size=[8, 1, 4]);
+  }
   translate([2.4, -4, 7]) cube(size=[2, 8, 4]);
   translate([-2.4-2, -4, 7]) cube(size=[2, 8, 4]);
   translate([2.4, 16-4, 7]) cube(size=[2, 8, 4]);
   translate([-2.4-2, 16-4, 7]) cube(size=[2, 8, 4]);
 }
+
+module wedge() {
+  linear_extrude(height=1) polygon(points=[[-0.5, 0], [0.5, 0], [0, 1]]);
+}
diff --git a/wanhao-butterfly-grown.svg b/wanhao-butterfly-grown.svg
new file mode 100644
index 0000000..4791437
--- /dev/null
+++ b/wanhao-butterfly-grown.svg
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="209.18082"
+   height="142.33421"
+   viewBox="-100 -100 83.672327 56.933685"
+   version="1.1"
+   id="svg2"
+   inkscape:version="0.48+devel r"
+   sodipodi:docname="wanhao-butterfly-grown.svg">
+  <metadata
+     id="metadata10">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs8" />
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1920"
+     inkscape:window-height="1008"
+     id="namedview6"
+     showgrid="false"
+     fit-margin-top="0"
+     fit-margin-left="0"
+     fit-margin-right="0"
+     fit-margin-bottom="0"
+     inkscape:zoom="2.3"
+     inkscape:cx="140.17009"
+     inkscape:cy="71.18878"
+     inkscape:window-x="-2"
+     inkscape:window-y="-3"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg2" />
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diff --git a/wanhao-butterfly.svg b/wanhao-butterfly.svg
new file mode 100644
index 0000000..83dba84
--- /dev/null
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