poster-tube-lid: WallMountBase fix render bug

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

diff --git a/poster-tube-lid.scad b/poster-tube-lid.scad
index ef0d856f38b0d4d0337b63f8c0bf853cbfb5ad49..d82b08d0a3bd3fd0273b8878d81d02d01e189d05 100644 (file)
--- a/poster-tube-lid.scad
+++ b/poster-tube-lid.scad
@@ -111,6 +111,7 @@ wmb_bottom_gap = 35; // includes allowance for padding, etc.
 wmb_bottom_th = 7;
 wmb_bottom_th_min = 1;
 wmb_ring_gap = 1.0;
+wmb_base_extra_rad = 10;
 
 catch_stalk_h = 4.5;
 catch_stalk_len = 50;
@@ -212,7 +213,7 @@ wmb_z_max = wmb_z_screw * 2;
 wmbb_y_max = wmb_y_mount_max + wmb_mount_gap_xy + wmb_mount_wall;
 wmbb_x_outer = wmb_x_outer + (wmb_mount_gap_xy + wmb_mount_wall);
 wmbb_z_flat_max = -wmb_bottom_gap;
-wmbb_z_flat_min = wmbb_z_flat_max - wmb_bottom_th_min;
+wmbb_z_flat_whole_min = wmbb_z_flat_max - wmb_bottom_th_min;
 wmbb_z_min      = wmbb_z_flat_max - wmb_bottom_th;
 
 smc_pos = [ 0, sm_inner_rad, 0 ];
@@ -758,7 +759,13 @@ module WallMountBase(){ ////toplevel
        }
       }
 
-//      linextr(
+      hull(){
+       linextr(wmbb_z_flat_whole_min, wmbb_z_flat_max)
+         circle(r = main_dia/2 + wmb_base_extra_rad);
+       linextr(wmbb_z_min, wmbb_z_flat_max)
+         circle(r = main_dia/2 + wmb_base_extra_rad -
+                (wmb_bottom_th - wmb_bottom_th_min));
+      }
     }
 
     // cutaway for mount part