From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 9 Oct 2017 00:53:37 +0000 (+0100)
Subject: poster-tube-lid: convert to oring: introduce some difference/union (nfc)
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=commitdiff_plain;h=261218ceab5d0657a37f8f60535ac715882224a3;hp=c34ec02ca0942b72299ae822eb32798cdadbe3ac

poster-tube-lid: convert to oring: introduce some difference/union (nfc)
---

diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad
index 4ea02d9..10eb603 100644
--- a/poster-tube-lid.scad
+++ b/poster-tube-lid.scad
@@ -111,27 +111,31 @@ echo(bayo_polygon);
 
 module MainProfile(){
   main_cnr_pos = [ side_thick, top_z ] - [1,1]*main_cnr;
-  translate(main_cnr_pos){
-    intersection(){
-      difference(){
-	circle(r = main_cnr);
-	circle(r = main_cnr * 0.5);
+  difference(){
+    union(){
+      translate(main_cnr_pos){
+	intersection(){
+	  difference(){
+	    circle(r = main_cnr);
+	    circle(r = main_cnr * 0.5);
+	  }
+	  square([10,10]);
+	}
       }
-      square([10,10]);
+      polygon([[ -1,                    seal_thick        ],
+	       [ -1,                    top_z             ],
+	       [ main_cnr_pos[0],       top_z             ],
+	       [ side_thick,            main_cnr_pos[1]   ],
+	       [ side_thick,            -side_height      ],
+	       [ side_taper,            -side_height      ],
+	       [ 0,                     -rivet_posn       ],
+	       [ 0,                     -(seal_recess[0] + seal_recess[1]) ],
+	       [ seal_recess[0],        -(seal_recess[0]) ],
+	       [ seal_recess[0],        seal_thick        ],
+	       ],
+	      convexity=10);
     }
   }
-  polygon([[ -1,                    seal_thick        ],
-	   [ -1,                    top_z             ],
-	   [ main_cnr_pos[0],       top_z             ],
-	   [ side_thick,            main_cnr_pos[1]   ],
-	   [ side_thick,            -side_height      ],
-	   [ side_taper,            -side_height      ],
-	   [ 0,                     -rivet_posn       ],
-	   [ 0,                     -(seal_recess[0] + seal_recess[1]) ],
-	   [ seal_recess[0],        -(seal_recess[0]) ],
-	   [ seal_recess[0],        seal_thick        ],
-	   ],
-	  convexity=10);
 }
 
 module RotateProjectSlice(offset, slice_size, nom_rad, real_rad){