// -*- C -*-
+include <funcs.scad>
+
module FArcSegment_mask(beta) {
for (i=[0 : 0.75 : 3]) {
rotate(i*beta/4)
stemlen = 50;
+topwidth = 30;
+
+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 + 1];
+elmid = [topwidth/2, -tuberad];
+ellow = tangent_intersect_b([0,hookcy], hookinrad, elmid);
+ellowextra = 180 - tangent_intersect_beta([0,hookcy], hookinrad, elmid);
module Plan(){
dy = tubeheight - tuberad*2;
square(center=false, size=[mainthick, stemlen/cos(bend)]);
}
-Plan();
+module ElevationCore(){
+ FArcSegment(0, hookcy, hookinrad, hookoutrad,
+ 180 - ellowextra,
+ 90 + hookcurl);
+ translate([-hookoutrad*sqrt(0.5), -(stemlen+10)]) mirror([1,0])
+ square(center=false, size=[topwidth, stemlen + tubeheight + 20]);
+ polygon([[-hookoutrad, ellow[1]],
+ reflect_in_y(eltop),
+ eltop,
+ elmid,
+ ellow]);
+}
-//FArcSegment(0, 20, 20,30, 20,160);
+Plan();
+translate([50,0])
+ ElevationCore();