chiark / gitweb /
doveclip DoveClipExtender has rounded pillars
authorIan Jackson <ijackson@chiark.greenend.org.uk>
Sun, 16 Sep 2012 14:15:20 +0000 (15:15 +0100)
committerIan Jackson <ijackson@chiark.greenend.org.uk>
Sun, 16 Sep 2012 14:15:20 +0000 (15:15 +0100)
doveclip.scad

index cc2a02b..7c9c1a3 100644 (file)
@@ -77,26 +77,45 @@ function DoveClipPairSane_width(count=2) =
   2 * (nomrad + jawthick + ((nomrad*2 + jawthick) * (count-1)/2));
 
 module DoveClipExtender(length, ha=7, hb=7, counta=2, countb=2,
-                       pillarw=3, pillarh=6, webthick=1) {
+                       pillarw=3.5, pillarslope=0.75, webthick=1) {
   mirror([1,0,0])
     DoveClipPairSane(h=ha, count=counta);
   translate([length,0,0])
     DoveClipPairSane(h=hb, count=countb);
   pillarlen = length - DoveClip_depth() * 2 + 2;
-  pilesw =
-    min(DoveClipPairSane_width(counta), DoveClipPairSane_width(countb)) - 0.5;
+  pilesw = min(DoveClipPairSane_width(counta), DoveClipPairSane_width(countb))
+    - 0.5 - pillarw*2;
   pilesh = min(ha, hb) - 0.5;
   d = 0.25;
   echo(pilesh);
+
+  intangle = atan(pillarslope);
+  polyjx = sin(intangle)*pillarw;
+  polyjy = cos(intangle)*pillarw;
+  polyex = -tan(intangle+90)*pillarw;
+  webmidy = pilesh/2+d;
+
   translate([DoveClip_depth() - 1, 0, 0]) {
-    for (mir=[0,1]) mirror([0,mir,0]) translate([0,-pilesw/2,0]) {
-      mirror([1,0,0]) rotate([0,-90,0]) linear_extrude(height=pillarlen){
-       polygon([[0,0], [pillarh,0], [0,pillarw]]);
-       polygon([[pilesh,0], [pilesh-pillarh,0], [pilesh,pillarw]]);
-       polygon([[0,d], [0,webthick], [pilesh-d,webthick], [pilesh-d,0]]);
+    for (ymir=[0,1]) mirror([0,ymir,0]) translate([0,-pilesw/2,0]) {
+       for (xmir=[0,1])
+         translate([0,0,pilesh/2]) mirror([0,0,xmir])
+             translate([0,0,-pilesh/2]) {
+           intersection() {
+             translate([-1, -pillarw-5, 0.01])
+               cube([pillarlen+2, pilesh+pillarw*2+10, pilesw]);
+             mirror([1,0,0]) rotate([0,-90,0])
+               linear_extrude(height=pillarlen) union(){
+                 circle(r=pillarw, $fn=20);
+                 polygon([[polyjx,polyjy-0.1], [polyex, 0],
+                          [polyjx,-(polyjy-0.1)]]);
+                 //polygon([[pilesh,0], [pilesh-pillarh,0], [pilesh,pillarw]]);
+                 polygon([[0,-webthick/2], [0,webthick/2],
+                          [webmidy,webthick/2], [webmidy,-webthick/2]]);
+             }
+           }
+         }
       }
-    }
   }
 }
 
-//DoveClipExtender(length=100, ha=16, hb=12, counta=3, countb=4);
+//DoveClipExtender(length=100, ha=16, hb=20, counta=3, countb=4);