creepy-hand: simple hack to split a creepy hand in two

[clinton/3d-models.git] / etc / canister.scad

// super simple canister
// 2018 Clinton Ebadi

inner_d = 20;
inner_h = 20;
cap_inner_h = 12;
cap_overlap = 10;
cap_tolerance = 0.5;

wall = 2;
base = 1;
sides = 6;


// calculated
outer_d = inner_d + wall*2;
outer_h = inner_h + wall - cap_inner_h + cap_overlap;

cap_outer_d = outer_d + wall*2;
cap_outer_h = cap_inner_h + base;

cap_bump_size = wall/2;
cap_bump_h = cap_bump_size * 2;
cap_bump_offset = cap_bump_h + 2;

echo (cap_bump_offset);


// other asserts, if I care enough...
assert (cap_inner_h > cap_overlap);
assert (cap_outer_h - cap_bump_offset > base);


//$fa = 0.1;
//$fs = 0.1;

canister_base ();
translate ([cap_outer_d + 1, 0, 0,]) canister_cap ();

//cap_bump ();

// inner
/* module cap_bump () { */
/*      $fn = sides; */
/*      cap_bump_d = outer_d+cap_bump_size*2; */

/*      difference () { */
/* 	  circle (d=cap_bump_d); */
/* 	  circle (d=outer_d); */
/*      } */

/*      /\* difference () { *\/ */
/*      /\* 	  cylinder (h=cap_bump_h, d=cap_bump_d, center=true); *\/ */
/*      /\* 	  cylinder (h=cap_bump_h+1, d=outer_d, center=true); *\/ */
/*      /\* } *\/ */

/*      /\* rotate_extrude () *\/ */
/*      /\* union () { *\/ */
/*      /\* 	  translate ([cap_bump_d/2, 0, 0]) *\/ */
/*      /\* 	       rotate ([0, 180, 0]) circle (cap_bump_size, $fn=3); *\/ */
/*      /\* } *\/ */
/* } */

module cap_bump () {
     cap_bump_d = outer_d+cap_bump_size/2;
     hull () {
	  translate ([0, 0, 0])
	       cylinder (d = cap_bump_d, h = cap_bump_h/3, $fn = sides);
	  translate ([0, 0, cap_bump_h/3])
	       cylinder (d = cap_bump_d + cap_bump_size, h = cap_bump_h/3, $fn = sides);
	  translate ([0, 0, cap_bump_h/3*2])
	       cylinder (d = cap_bump_d, h = cap_bump_h/3, $fn = sides);
     }
     /* 	       cylinder (d = cap_bump_d + cap_bump_size, h = cap_bump_h, $fn = sides); */
     /* 	       translate ([0, 0, -cap_bump_h]) cylinder (d = inner_d, h = cap_bump_h*2+0.1, $fn = sides); */
     /* 	  } */
     /* 	  sphere_d = (cap_bump_h+0.1); */
     /* 	  translate ([cap_bump_d/2-cap_bump_size, 0, cap_bump_h/2]) sphere (d = sphere_d); */
     /* } */

     /* minkowski () { */
     /* 	  cylinder (d = outer_d, h = cap_bump_size*2, $fn = sides); */
     /* 	  sphere (d = cap_bump_size); */
     /* } */
     /* rotate_extrude () { */
     /* 	  translate ([inner_d/2, 0, 0]) circle (cap_bump_size); */
     /* } */
}

module canister_base () {
     difference () {
	  union () {
	       cylinder (d = outer_d, h = outer_h, $fn = sides);
	       translate ([0, 0, outer_h - cap_overlap + cap_bump_offset]) cap_bump ();
	  }
	  translate ([0, 0, base]) cylinder (d = inner_d, h = outer_h + 1, $fn = sides);
     }
}

module canister_cap () {
     tolerance_pct = 1.05;
     difference () {
	  cylinder (d = cap_outer_d, h = cap_outer_h, $fn = sides);
	  translate ([0, 0, base]) cylinder (d = outer_d + cap_tolerance, h = cap_outer_h+1, $fn = sides);
	  translate ([0, 0, cap_outer_h - cap_bump_offset]) scale ([tolerance_pct, tolerance_pct, tolerance_pct]) cap_bump ();
     }
}