scaffold-clamp-cleat: wip

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/scaffold-clamp-common.scad b/scaffold-clamp-common.scad
index cc5bad153206ffca5fdb94c8685e9bcd2de9dff8..77f138846f825443f644d6901244ff33595157ec 100644 (file)
--- a/scaffold-clamp-common.scad
+++ b/scaffold-clamp-common.scad
@@ -36,6 +36,7 @@ cleat_horn_l = 60;
 cleat_horn_d_min = [8, 10];
 cleat_horn_d_max = [10, 12];
 cleat_height = 25;
+cleat_stem_l = 20;
 
 // ---------- hhook ----------
 
@@ -255,12 +256,16 @@ function cleat_frame_x(s) = cleat_curve_r * sin(cleat_frame_theta(s));
 function cleat_frame_r(s) = ( cleat_horn_d_min * s +
                              cleat_horn_d_max * (1-s) ) * 0.5;
 
+module CleatFrameSphere(r) {
+  scale([1, r[1]/r[0], 1])
+    sphere(r= r[0]);
+}
+
 module CleatFrame(s) {
   r = cleat_frame_r(s);
   translate([cleat_frame_x(s), 0, cleat_frame_z(s)])
     rotate([0, 90, 0])
-    scale([1, r[1]/r[0]])
-    sphere(r= r[0]);
+    CleatFrameSphere(r);
 }
 
 
@@ -275,14 +280,45 @@ module CleatHorn(){
   }
 }
 
+module CleatBase(){
+  frames = cleat_frames/2;
+  se = cleat_stem_l/2 / cleat_horn_l;
+  r = cleat_frame_r(se);
+
+  for (si=[0: frames-2]) {
+    s0 = se * si / (frames-1);
+    s1 = se * (si+1) / (frames-1);
+    hull(){
+      for (z= [-(cleat_height + tube_dia/2),
+              cleat_frame_z(se)]) {
+       translate([cleat_frame_x(se), 0, z])
+         CleatFrameSphere(r);
+      }
+    }
+  }
+
+  for (si=[0 : cleat_frames-2]) {
+    s0 = si / (cleat_frames-1);
+    s1 = (si+1) / (cleat_frames-1);
+    //hull(){
+      CleatFrame(s0);
+      CleatFrame(s1);
+    //}
+  }
+}
+
 module VCleatA(){ ////toplevel
   %DummyA();
 
   translate([0, -(main_r + cleat_height), 0]) {
     rotate([0, -90, 90]) {
       for (m=[0,1]) {
-       mirror([m,0,0])
+       mirror([m,0,0]) {
          CleatHorn();
+       }
+       mirror([m,0,0]) {
+         CleatBase();
+       }
       }
     }
   }