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 = 50;
+stemlen = 40;
-topwidth = 30;
+topwidth = 20;
hookinrad = 7.5;
hookcurl = 60;
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),
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);
+ }
+}
+
+// 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();
+}
+
+FPlan();
+translate([60,0,0]) Plan();
+//ElevationCore();
+//RightHook();