X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=wardrobe-hook.scad;h=331121cffc1772c73cefc8d38e703252bbb990eb;hp=e37e1dacb87125407e94454ca907446900adbb7d;hb=3a559f2503f11a583d9da3708f5d08b18a3c428b;hpb=98829f3f7c334d0bd11c1f7db6df149a1de67f15

diff --git a/wardrobe-hook.scad b/wardrobe-hook.scad
index e37e1da..331121c 100644
--- a/wardrobe-hook.scad
+++ b/wardrobe-hook.scad
@@ -1,5 +1,7 @@
 // -*- C -*-
 
+include <funcs.scad>
+
 module FArcSegment_mask(beta) {
   for (i=[0 : 0.75 : 3]) {
     rotate(i*beta/4)
@@ -13,8 +15,8 @@ module FArcSegment(xc,yc,inrad,outrad,alpha,delta) {
   translate([xc,yc]) {
     intersection() {
       difference() {
-	circle(r=outrad);
-	circle(r=inrad);
+	circle(r=outrad, $fn=70);
+	circle(r=inrad, $fn=70);
       }
       rotate(alpha) scale(outrad*2) {
 	FArcSegment_mask(delta);
@@ -23,26 +25,111 @@ module FArcSegment(xc,yc,inrad,outrad,alpha,delta) {
   }
 }
 
-tubeheight = 30;
-tubewidth = 15;
+tubeslop = 0.5;
+tubeheight = 30 + tubeslop;
+tubewidth = 15 + tubeslop;
 mainthick = 4;
 
 clipthick = 2;
-clipang = 120;
+clipang = 135;
+
+stemlen = 40;
 
-bend = 5;
+topwidth = 20;
+
+hookinrad = 7.5;
+hookcurl = 60;
+hookwidth = 4;
 
 tuberad = tubewidth/2;
+bend = atan(tuberad/stemlen);
 mainoutrad = tuberad + mainthick;
+hookoutrad = hookinrad + hookwidth;
+hookcy = -(stemlen - hookoutrad);
 
-module Plan(){
+eltop = [topwidth/2, -tuberad + tubeheight + mainthick + 0.1];
+elmid = [topwidth/2, -tuberad];
+ellow = tangent_intersect_b([0,hookcy], hookinrad, elmid);
+ellowextra = 180 - tangent_intersect_beta([0,hookcy], hookinrad, elmid);
+
+module ClipPlan(qbend, qstemleny){
   dy = tubeheight - tuberad*2;
   FArcSegment(0, dy, tuberad, mainoutrad, -1, 181);
-  FArcSegment(0, 0,  tuberad, mainoutrad, -bend, bend+1);
+  FArcSegment(0, 0,  tuberad, mainoutrad, -qbend, qbend+1);
   translate([tuberad, 0]) square(center=false, size=[mainthick,dy]);
   FArcSegment(0, 0, tuberad, tuberad + clipthick, 360-clipang, clipang+1);
+  rotate(-qbend) translate([tuberad, 0]) mirror([0,1])
+    square(center=false, size=[mainthick, qstemleny/cos(qbend)]);
 }
 
-Plan();
+module Plan(){
+  ClipPlan(bend,stemlen);
+}
+
+module ElevationCore(){
+  FArcSegment(0, hookcy, hookinrad, hookoutrad,
+	      180 - ellowextra,
+	      90 + hookcurl + ellowextra);
+  translate([-hookoutrad*sqrt(0.5),
+	      hookcy - hookoutrad*sqrt(0.5) + 0.1])
+    mirror([1,0])
+    square(center=false, size=[topwidth, stemlen + tubeheight + 20]);
+  polygon([[-hookoutrad, ellow[1]],
+	   reflect_in_y(eltop),
+	   eltop,
+	   elmid,
+	   ellow]);
+}
+
+// after here is all 3D
+
+module Primary(){
+  intersection(){
+    translate([0,0, -(topwidth+10)/2])
+      linear_extrude(height=topwidth+10) Plan();
+    translate([50,0])
+      rotate([0,-90,0])
+      linear_extrude(height=100)
+      ElevationCore();
+  }
+}
+
+module PlaneAbove(){
+  translate([-100,-100,0]) cube(center=false,size=[200,200,200]);
+}
+
+taperangle = -270 + tangent_intersect_beta([-hookcy, 0],
+					  hookoutrad,
+					  [-eltop[1], -eltop[0]]);
+module Hook(){ ////toplevel
+  difference(){
+    rotate([taperangle,0,0])
+      translate([0,-eltop[1],0])
+      Primary();
+    translate([0,0,topwidth/2])
+      rotate([taperangle*2,0,0])
+      PlaneAbove();
+    translate([0,0,-topwidth/2])
+      mirror([0,0,1]) PlaneAbove(0);
+  }
+}
+
+// frontbackly version, everything prefixed with f or F
+
+fstemleny = -hookcy;
+fbend = atan((tuberad - hookinrad) / fstemleny);
+
+module FPlan(){
+  ClipPlan(fbend, fstemleny);
+}
+
+// toplevels etc.
+
+module RightHook(){ ////toplevel
+  mirror([1,0,0]) Hook();
+}
 
-//FArcSegment(0, 20, 20,30, 20,160);
+FPlan();
+translate([60,0,0]) Plan();
+//ElevationCore();
+//RightHook();