X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=wardrobe-hook.scad;h=959e967a78bd316ebb3345f182b8f7bcd00811d3;hp=b247bd0bcdb20c02986af33e949ad48aefbf3eec;hb=e6d87de49c2f1865ce966cdf8e178abfd4419782;hpb=b04d1628ce81bb99bd50f1680203902eac01e032

diff --git a/wardrobe-hook.scad b/wardrobe-hook.scad
index b247bd0..959e967 100644
--- a/wardrobe-hook.scad
+++ b/wardrobe-hook.scad
@@ -1,26 +1,192 @@
 // -*- C -*-
 
-module FArcSegment_mask(beta) {
-  for (i=[0 : 0.75 : 3]) {
-    rotate(i*beta/4)
-      polygon([[0, 0],
-	       [1, 0],
-	       [cos(beta), sin(beta)]]);
+include <funcs.scad>
+include <utils.scad>
+
+tubeslop = 0.5;
+tubeheight = 30 + tubeslop;
+tubewidth = 15 + tubeslop;
+mainthick = 4;
+
+clipthick = 2;
+clipang = 135;
+
+stemlen = 40;
+
+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);
+
+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, -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)]);
+}
+
+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 HookL(){ ////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);
+}
+
+module SElevation(){
+  boty = shookcy - hookoutrad - 1;
+  polygon([[-1,         tubeheight],
+	   [topwidth,   tubeheight],
+	   [topwidth,   elmid[1]],
+	   [hookwidth,  shookcy],
+	   [hookwidth,  boty],
+	   [-1,         boty]]);
+}
+
+module SElevationPlaced(){
+  rotate([0,-90,0]) translate([0,0,-100]) linear_extrude(height=200)
+    SElevation();
+}
+
+module SHookL(){ ///toplevel
+  intersection(){
+    linear_extrude(height=topwidth) SPlan();
+    SElevationPlaced();
   }
 }
 
-module FArcSegment(xc,yc,inrad,outrad,alpha,delta) {
-  translate(xc,yc) {
-    intersection() {
-      difference() {
-	circle(r=outrad);
-	circle(r=inrad);
-      }
-      rotate(alpha) scale(outrad*2) {
-	FArcSegment_mask(delta);
-      }
+// straight-on version, reversed, everything prefixed with t or T
+
+tjoinrad = mainoutrad * 0.7;
+tstem0leny = tuberad - tjoinrad*0.5;
+tjoinoutrad = tjoinrad + mainthick;
+
+thookcy = shookcy;
+
+tjoin0c = [tuberad - tjoinrad, -tstem0leny];
+tjoin1c = [0,                      thookcy];
+
+tbend_raw = tangents_intersect_beta(tjoin0c, tjoinrad,
+				    tjoin1c, -hookoutrad);
+tbend0 = angle_map_range(tbend_raw,       0);
+tbend1 = angle_map_range(tbend_raw + 180, -180);
+
+tbend0p = circle_point(tjoin0c, tjoinrad, tbend_raw);
+tbend1p = circle_point(tjoin1c, -hookoutrad, tbend_raw);
+
+module TPlan(){
+  ClipPlan(0, tstem0leny);
+  FArcSegment(tjoin0c[0],tjoin0c[1], tjoinrad,tjoinoutrad,
+	      tbend0, 360-tbend0);
+  FArcSegment(0,shookcy, hookinrad,hookoutrad,
+	      tbend1, 270+hookcurl - tbend1);
+  translate(tbend0p) {
+    rotate(tbend_raw+180) mirror([1,0]) {
+      translate([0,-0.1]) square(size=[mainthick, dist2d(tbend0p,tbend1p)+0.2]);
     }
   }
 }
 
-FArcSegment(10,10, 20,30, 20,10);
+module THookR(){ ///toplevel
+  intersection(){
+    linear_extrude(height=topwidth) TPlan();
+    SElevationPlaced();
+  }
+}
+
+// other toplevels etc.
+
+module HookR(){ ////toplevel
+  mirror([1,0,0]) HookL();
+}
+
+module SHookR(){ ////toplevel
+  mirror([1,0,0]) SHookL();
+}
+
+module THookL(){ ////toplevel
+  mirror([1,0,0]) THookR();
+}
+
+module Demo(){ ////toplevel
+  translate([-30,tubeheight,0]) HookL();
+  translate([  0,tubeheight,0]) HookR();
+  translate([ 30,         0,0]) SHookL();
+  translate([ 60,         0,0]) SHookR();
+  translate([ 90,         0,0]) THookL();
+  translate([120,         0,0]) THookR();
+}