X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=cliphook.scad;h=a6fcffe79f24683890ed3826bbdb71c29ad84064;hp=826d0d754554d34bf3f91a9f527e39b7d0edffef;hb=abe05b69845ac02b78b25602905fecd8a207d47f;hpb=d3b970ba05936a4d135dbf1b45a58faec1af7f83

diff --git a/cliphook.scad b/cliphook.scad
index 826d0d7..a6fcffe 100644
--- a/cliphook.scad
+++ b/cliphook.scad
@@ -1,3 +1,4 @@
+// -*- C -*-
 
 function ClipHook_r2(w,g,l,ye,k) = w/2 + g + w/2;
 function ClipHook_r3(w,g,l,ye,k) = k * (ClipHook_r2(w,g,l,ye,k) + w + g);
@@ -15,11 +16,11 @@ module FlatArc(cx,cy,r1,r2,a1,a2=361,$fn=$fn) {
       difference() {
 	circle(r=r2);
 	translate([0,0,-1])
-	  circle(r=r1, h=h+2);
+	  circle(r=r1);
       }
       scale(size) {
 	for (ai=[0:4]) {
-	  echo(" jarc ", a1,a2, astep, ai, a1 + astep*ai );
+	  //echo(" jarc ", a1,a2, astep, ai, a1 + astep*ai );
 	  rotate(a1 + astep*ai) {
 	    polygon([ [0,0], [1,0],
 		      [cos(astep*2),sin(astep*2)] ]);
@@ -38,7 +39,7 @@ module ClipHook_2D(w,g,l,ye,k,h) {
 
   xd = l*1.5 + w;
   xc = -l/2;
-  yc = g/w + w/2;
+  yc = g/2 + w/2;
 
   alpha = atan2((xe-xd)/r3, (ye-yd)/r3);
 
@@ -59,12 +60,26 @@ module ClipHook_2D(w,g,l,ye,k,h) {
   jcirc(xe,ye);
 }
 
-module ClipHook(w=1.2, g=0.2, l=0.0, ye=0, k=2.0, h=3.5, demo=false) {
-  linear_extrude(height=h)
-    ClipHook_2D(w,g,l,ye,k);
-  if (demo)
-    %linear_extrude(height=h)
-      translate([l+w,0,0]) rotate(180) ClipHook_2D(w,g,l,ye,k);
+module ClipHook(w=1.2, g=0.2, l=0.0, ye=0, k=2.0, h=3.5, demo=false,
+		cupcaph=0, cupgapg=0) {
+  difference() {
+    linear_extrude(height=h)
+      ClipHook_2D(w,g,l,ye,k);
+    if (cupcapg != 0) {
+      translate([-g+0.01,-(w+g),h-cupcapg])
+      cube([w,(w+g),cupcaph+1]);
+    }
+  }
+  if (cupcaph != 0) {
+    translate([-l/2, g/2+w/2, h-0.01])
+      intersection() {
+        cylinder(r=ClipHook_r2(w,g,l,ye,k)+w*0.4, h=cupcaph, $fn=16);
+	translate([-50-g,-50,-1]) cube([50,100,h+2]);
+      }
+  }
 }
 
-//ClipHook(l=3, ye=1.5, k=1, demo=true);
+if (ClipHook_demo) {
+  ClipHook(l=0, k=1, cupcaph=1, cupcapg=0.4);
+  %translate([l+w,0,0]) rotate(180) ClipHook(l=0, k=1, cupcaph=1, cupcapg=0.4);
+}