acorn: make cap dome height parametric

Minimal support for alternative cap models.

diff --git a/acorn/acorn-threads.scad b/acorn/acorn-threads.scad
index 688ef30..7173ae5 100644 (file)
--- a/acorn/acorn-threads.scad
+++ b/acorn/acorn-threads.scad
@@ -35,6 +35,7 @@ module acorn (thread_pitch = 3.0,
              base_height = AUTO_CALCULATE,
              wall_thickness = AUTO_CALCULATE,
              outer_d = AUTO_CALCULATE,
              base_height = AUTO_CALCULATE,
              wall_thickness = AUTO_CALCULATE,
              outer_d = AUTO_CALCULATE,

+             dome_h = AUTO_CALCULATE,

 
               keychain = true) {
 
 
               keychain = true) {
 


@@ -110,9 +111,9 @@ module acorn (thread_pitch = 3.0,
               }
               if (keychain) cap_keychain_holes ();
 
               }
               if (keychain) cap_keychain_holes ();
 

-              // hollow it out (make parametric later, this is pretty ugly now, but calc seems to be ok for RaleighAcorn)
+              // hollow the cap out (make parametric later, this is pretty ugly now, but calc seems to be ok for RaleighAcorn)

               diam_to_height_ratio = 3.2;
               diam_to_height_ratio = 3.2;

-              dome_h = outer_d / diam_to_height_ratio - thread_height;
+              dome_h = (dome_h == AUTO_CALCULATE) ? outer_d / diam_to_height_ratio - thread_height : dome_h;

               echo ("dome_h = ", dome_h);
               difference () {
                    translate ([0, 0, thread_height-0.01]) dome (d=outer_d, h=dome_h);
               echo ("dome_h = ", dome_h);
               difference () {
                    translate ([0, 0, thread_height-0.01]) dome (d=outer_d, h=dome_h);