earring-stand: EclipRPlan good

[reprap-play.git] / earring-stand.scad

diff --git a/earring-stand.scad b/earring-stand.scad
index 52ad317946869a3588662580459b621df3ec7148..08f0701ebc0d5281e7efc655c37e415f4bca7fc4 100644 (file)
--- a/earring-stand.scad
+++ b/earring-stand.scad
@@ -6,19 +6,71 @@ eclip_prong_th = 3;
 eclip_outer_strt = 0.5;
 eclip_inner_xstrt = 0.5;
 
+eclip_ult_angle = 44;
+eclip_base_epsilon = 0.5;
+
+test_alpha = 10;
+test_main_th = 1.5;
+
 // calculated
 
+include <utils.scad>
+
 eclip_inner_strt = eclip_outer_strt + eclip_inner_xstrt;
 
 r0 = eclip_inner_rad;
-r1 = r0 + eclip_inner_rad;
+r1 = r0 + eclip_gap_rad;
 r2 = r1 + eclip_prong_th;
+r2e = r1 + eclip_base_epsilon;
+
+ppxl = -(r0 / sqrt(2)) + (eclip_inner_strt / sqrt(2));
+
+rgap = eclip_gap_rad;
+
+$fn=70;
 
 module EclipLPlanCore(alpha){
+  FArcSegment(0,0, r1,r2,
+             180-eclip_ult_angle, eclip_ult_angle-alpha +1);
+
   difference(){
-    circle(r = r2);
-    circle(r = r1);
+    hull(){
+      intersection(){
+       circle(r2);
+       rotate(-alpha) mirror([1,1]) square([r2e, 50]);
+     }
+      rotate(-alpha) mirror([1,1]) square([r2e, r2]);
+    }
+    circle(r1);
+  }
+}
+
+module EclipRPlan(alpha, main_th){
+  intersection(){
+    rotate(alpha)
+      translate([ppxl + main_th + rgap, -r2*2])
+      square([eclip_prong_th, r2*(2 + 1/sqrt(2))]);
+    translate([-r2, -r2e])
+      square([r2*3, eclip_base_epsilon + r2*4]);
+  }
+}
+
+module EclipLPlan(alpha){
+  rotate(alpha) EclipLPlanCore(alpha);
+}
+
+module EclipPPlan(main_th){
+  intersection(){
+    hull(){
+      circle(r0);
+      rotate(90-eclip_ult_angle) square([r0,r0]);
+    }
+    translate([-(r0+.1), -(r0+.1)])
+      square([(r0+.1) + main_th + ppxl, r2*2]);
   }
+  translate([ppxl, 0]) square([main_th, r2]);
 }
 
-EclipLPlanCore(10);
+color("red") EclipLPlan(test_alpha);
+color("blue") rotate(test_alpha) EclipPPlan(test_main_th);
+color("green") EclipRPlan(test_alpha, test_main_th);