From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Fri, 22 Jan 2021 19:28:22 +0000 (+0000)
Subject: scaffold-clamp-cleat: wip, reorg nfc
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=3b7f6f013523cb8eaa20c7a5b333aa516999e92d;p=reprap-play.git

scaffold-clamp-cleat: wip, reorg nfc

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

diff --git a/scaffold-clamp-common.scad b/scaffold-clamp-common.scad
index 843e05c..f3e25ad 100644
--- a/scaffold-clamp-common.scad
+++ b/scaffold-clamp-common.scad
@@ -249,12 +249,14 @@ module VHookPlanDemo(){
 
 // ---------- cleat ----------
 
+function cleat_frame_theta(s) = s * cleat_horn_l / cleat_curve_r * 360/TAU;
+function cleat_frame_z(s) = cleat_curve_r * (1 - cos(cleat_frame_theta(s)));
+function cleat_frame_x(s) = cleat_curve_r * sin(cleat_frame_theta(s));
+
 module CleatFrame(s) {
   r = ( cleat_horn_d_min * s +
 	cleat_horn_d_max * (1-s) ) * 0.5;
-  translate([0,0, cleat_curve_r])
-    rotate( s * cleat_horn_l / cleat_curve_r * 360/TAU * [0,1,0] )
-    translate([0,0, -cleat_curve_r])
+  translate([cleat_frame_x(s), 0, cleat_frame_z(s)])
     rotate([0, 90, 0])
     scale([1, r[1]/r[0]])
     sphere(r= r[0]);