X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=wardrobe-hook.scad;h=27b02dc984b03a2a954c4ad57dcc336918875aff;hp=ecb1b12b66cb572fdee4cb0e126a41b1e9384251;hb=eb49b7376b011467575229b3214f48860588dfe2;hpb=f57afd91759a049296c6d454b2e3a2b46a5560f7

diff --git a/wardrobe-hook.scad b/wardrobe-hook.scad
index ecb1b12..27b02dc 100644
--- a/wardrobe-hook.scad
+++ b/wardrobe-hook.scad
@@ -15,8 +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);
@@ -25,16 +25,17 @@ 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 = 50;
+stemlen = 40;
 
-topwidth = 30;
+topwidth = 20;
 
 hookinrad = 7.5;
 hookcurl = 60;
@@ -46,26 +47,32 @@ mainoutrad = tuberad + mainthick;
 hookoutrad = hookinrad + hookwidth;
 hookcy = -(stemlen - hookoutrad);
 
-eltop = [topwidth/2, -tuberad + tubeheight + mainthick + 1];
+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 Plan(){
+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(-bend) translate([tuberad, 0]) mirror([0,1])
-    square(center=false, size=[mainthick, stemlen/cos(bend)]);
+  rotate(-qbend) translate([tuberad, 0]) mirror([0,1])
+    square(center=false, size=[mainthick, qstemleny/cos(qbend)]);
+}
+
+module Plan(){
+  ClipPlan(bend,stemlen);
 }
 
 module ElevationCore(){
   FArcSegment(0, hookcy, hookinrad, hookoutrad,
 	      180 - ellowextra,
-	      90 + hookcurl);
-  translate([-hookoutrad*sqrt(0.5), -(stemlen+10)]) mirror([1,0])
+	      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),
@@ -74,6 +81,61 @@ module ElevationCore(){
 	   ellow]);
 }
 
-Plan();
-translate([50,0])
-  ElevationCore();
+// 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);
+  }
+}
+
+// straight-on version, everything prefixed with s or S
+
+shookcy = -(stemlen-hookoutrad);
+sstemleny = -shookcy;
+sbend_raw = tangents_intersect_beta([0,0],tuberad,
+				    [0,shookcy],hookinrad);
+sbend = angle_map_range(360-sbend_raw, -180);
+
+module SPlan(){
+  ClipPlan(sbend, sstemleny);
+  FArcSegment(0,shookcy, hookinrad,hookoutrad,
+	      270 - hookcurl,
+	      hookcurl + 90 - sbend);
+}
+
+// toplevels etc.
+
+module RightHook(){ ////toplevel
+  mirror([1,0,0]) Hook();
+}
+
+SPlan();
+translate([60,0,0]) ElevationCore();
+//ElevationCore();
+//RightHook();