// E clip type hardware for mystery ranch metcalf ultralite frame

legDiam=10;
bodyDiam=11.5;
ctcLength=20;
legLength=20;
cordDiam=3;
cordHoleGap=0.75;
flattenBottom=0.3;
$fn = 40;

difference(){

// half of e mirrored across yz +++++++++++++++++++++++++++++++++++++++++++
color("blue"){
  for (dir = [-1 : 1] ) mirror([dir, 0, 0]){
    union(){
      rotate([0,90,0]){
          cylinder(ctcLength / 2, d = bodyDiam, center=false);
      }
      // rounded corner
      translate([ctcLength / 2, 0, 0]){
        sphere(d = bodyDiam);
      }
      // e leg outer
      translate([ctcLength / 2, legLength / 2 + bodyDiam / 4, 0]){
          rotate([90, 0, 0]){
              cylinder( legLength + bodyDiam / 2, d = legDiam, center = true);
            }
        }
      // rounded leg ends
      translate([ctcLength / 2, legLength + bodyDiam / 2, 0]){
        sphere(d = legDiam);
      }
    }
  }
}

// flatten bottom for better print and interface ---------------------------
color("red"){
  translate([0, 0, -1 * (1 - flattenBottom) * legDiam]){
    cube( [2 * ctcLength, 4 * legLength, legDiam], center=true);
  }
}

//holes for cord
color("green"){
    for (dir = [-1 : 1]) mirror([dir, 0, 0]){
        translate([cordHoleGap * cordDiam, 0, bodyDiam/7]){
          rotate([90, 0, 0]){
          cylinder( bodyDiam * 1.1, d = cordDiam, center = true);
          }

        }
    }
}

//relief for cord bend
color("yellow"){
    translate([0, bodyDiam / -2, bodyDiam/7]){
        rotate([0, 90, 0]){
            cylinder(cordDiam * cordHoleGap * 2, d = cordDiam, center = true);
        }
    }
}
}