// -*- C -*-
+include <funcs.scad>
+
module FArcSegment_mask(beta) {
for (i=[0 : 0.75 : 3]) {
rotate(i*beta/4)
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);
}
}
-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);
+ }
+}
+
+// straight-on version, everything prefixed with s or S
+
+sstemleny = -hookcy;
+sbend_raw = tangents_intersect_beta([0,0],tuberad,
+ [0,-(stemlen-hookinrad)],hookinrad);
+sbend = angle_map_range(360-sbend_raw, -180);
+
+module SPlan(){
+ ClipPlan(sbend, sstemleny);
+}
+
+// toplevels etc.
+
+module RightHook(){ ////toplevel
+ mirror([1,0,0]) Hook();
+}
-//FArcSegment(0, 20, 20,30, 20,160);
+SPlan();
+translate([60,0,0]) Plan();
+//ElevationCore();
+//RightHook();