X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=treefoil.scad.pl;h=ee233a948661e66ebc82cdb80d4dc94ac8d059ec;hb=6a319b7ceeca0d02fbeac92c0737e976919d87a1;hp=b1ceecbec8400a3129e0aeffd953b0e3f234910d;hpb=1dd4579d895f0f99ebd9bd8cffc307296c207af0;p=reprap-play.git

diff --git a/treefoil.scad.pl b/treefoil.scad.pl
index b1ceecb..ee233a9 100755
--- a/treefoil.scad.pl
+++ b/treefoil.scad.pl
@@ -1,5 +1,8 @@
 #!/usr/bin/perl -w
 
+# Use:
+#   - support X/Y dist 0.5mm
+
 use strict;
 
 our $shape = <<'END';
@@ -7,6 +10,8 @@ xyyZZYYXYxxyzYYZXzzxyXXYXXXZxxxyyXXZyyyzXXzz
 zxxYYXXZXzzxyXXYZyyzxZZXZZZYzzzxxZZYxxxyZZyy
 yzzXXZZYZyyzxZZXYxxyzYYZYYYXyyyzzYYXzzzxYYxx
 END
+# simple version (unknotted, [0,1,2]^3):
+# YxxyzYYZXzzxyXXYZyyzxZZX
 
 sub o { print @_ or die $!; }
 
@@ -36,3 +41,35 @@ o "}\n\n";
 while (<DATA>) { o $_ }
 
 __DATA__
+
+thick = 6;
+edgeu = 10;
+
+// calculated
+
+octa_long = thick;
+octa_short = octa_long / (1 + sqrt(2));
+
+module OctaThing() {
+    hull(){
+	for (r = [[0,0,0], [90,0,0], [0,90,0]]) {
+	    rotate(r)
+		cube([ octa_short,octa_short, octa_long ], center=true);
+	}
+    }
+}
+
+module TraceEdge(p,q) {
+    hull(){
+        for (x=[p,q]) {
+            translate(x * edgeu)
+                OctaThing();
+        }
+    }
+}
+
+rotate([0,0,45])
+  rotate([0,90,0])
+  Trace();
+
+