// -*- C -*-

cubez = 12;

shaftz = cubez;
recessz = 5;

tests = [[4 + 0.5,  10 + 1.0]];

cubexy = 20;

module RecessScrewCutout_RecessCylinder(recessdia, h){
  translate([0,0,-1]) cylinder(r=recessdia/2, h=h+1, $fn=40);
}

module RecessedScrewCutout(shaftdia, recessdia) {
  recesstopz = recessz + 0.5*recessdia + 0.1;
  xblocky = shaftdia + 0.1;

  translate([0,0,-1]) cylinder(r=shaftdia/2, h=shaftz+2, $fn=20);
  RecessScrewCutout_RecessCylinder(recessdia, recessz);
  intersection(){
    translate([-recessdia*1.5, -xblocky/2, -1])
      cube([recessdia*3, xblocky, recesstopz+3]);
    translate([0, -recessdia, recesstopz])
      rotate([0,135,0]) cube([recessdia, recessdia*2, 10]);
    RecessScrewCutout_RecessCylinder(recessdia, recesstopz+1);
  }
}

module Test(){
  difference(){
    translate([-cubexy/2, -cubexy/2, 0])
      cube([cubexy,cubexy,cubez]);
  }
}

module Hole(){
    RecessedScrewCutout(tests[0][0],
			tests[0][1],
			-1);
}

//Test();
Hole();