// -*- C -*-

main_dia = 71.2 + 0.50;
top_thick = 4;

main_cnr = 4.0;

rivet_posn = 6.0;
rivet_thick = 1.67;
rivet_width = 4.15 + 1.0;
rivet_tall = 5.51 + 0.49;

over_rivet = 0.5;

bayo_interf = 0.75;
bayo_behind = 3.5;

seal_thick = 0.1;
seal_pocket = 2.0;

side_taper = 1.0;

// calculated

side_height = rivet_posn + bayo_behind;
side_thick = rivet_tall + over_rivet;

top_z = top_thick + seal_thick;

$fs=0.5;
$fa=5;

module MainProfile(){
  main_cnr_pos = [ side_thick, top_z ] - [1,1]*main_cnr;
  translate(main_cnr_pos){
    intersection(){
      difference(){
	circle(r = main_cnr);
	circle(r = main_cnr * 0.5);
      }
      square([10,10]);
    }
  }
  %polygon([[ -1,                    seal_thick      ],
	   [ -1,                    top_z            ],
	   [ main_cnr_pos[0],       top_z            ],
	   [ side_thick,            main_cnr_pos[1]  ]]);
}

MainProfile();