For use with https://www.prusaprinters.org/prints/26919-headband-for-protective-face-shield-rc2-type

stack_test.scad

$fn=100;

headband_file="headband-15-mm-height-no-hex_pla.stl";

num=5;
adjust_base_z=3.28;
adjust_base_x=0;
adjust_base_y=-8.95;
support_thickness=1.2;
support_bridge=1.5;
heigth=15;
bump=0.30;
cylinder_size=0.4;
extend_for_testing=00; //Set to 10 to see cylinders

//Supports on just one side
support_locs=[
             [0,67.55],
             [90.95,7.1],
             [0,27.2],
             [84.5,-29],
             
             [86.25,-68],
             ];



rotate(180){
  color("OrangeRed"){
    for(x=[0:num-1]){
    translate([adjust_base_x,adjust_base_y,x*(heigth+bump)+adjust_base_z]){
           import(headband_file, convexity=3);     
      }
    }
  }
  
  mirror_copy()
    cylinder_supports();
  
  //Supports
  mirror_copy(){
     support_front();
     support_side();
  }
}

module support_front(){
  color("#00FF00"){
  translate([0,0.5]){
    union(){
      //Supports
      linear_extrude(2*bump){
        translate([29.55,67.5]){
          difference(){
            difference(){
              union(){
                circle(10);
              }
              translate([5,-30.8]){
                rotate(73){
                  square(25);
                }
              }
            }
            circle(4-support_thickness);
            translate([0,-4+support_thickness,0]){
              square(8-2*support_thickness, center=true);
            }
          }
        }
      }
      
      linear_extrude((num-1)*(heigth+bump)){
        translate([29.55,67.5]){
          difference(){
            difference(){
              union(){
                circle(4);
                translate([0,-4,0]){
                  square(8, center=true);
                }
              }
              translate([0,-24]){
                rotate(73){
                  square(20);
                }
              }
            }
            circle(4-support_thickness);
            translate([0,-4+support_thickness,0]){
              square(8-2*support_thickness, center=true);
            }
          }
        }
      }

    for(y = [1:num-1]){
      translate([0,0,y*(heigth+bump)-support_bridge-bump]){  
        //support_bridge
        linear_extrude(support_bridge){
          translate([29.55,67.5]){
              difference(){
                union(){
                  circle(4);
                  translate([0,-4,0]){
                    square(8, center=true);
                  }
                }
                translate([0,-24]){
                  rotate(73){
                    square(20);
                  }
                }
              }
            }
          }
        }
      }
    } 
  }
  }
}

module support_side(){
  color("#00FFFF"){
    //supports
    linear_extrude(2*bump){
        translate([93.05,13.9]){
        rotate(-3){
          difference(){
            difference(){
              union(){
                circle(10);
              }
              translate([-17.7,-25]){
                rotate(27){
                  square(24);
                }
              }
            }
            circle(4-support_thickness);
            translate([-4+support_thickness,0,0]){
              square(8-2*support_thickness, center=true);
            }
          }
        }
        }
      }
      
      
    //union(){
      linear_extrude((num-1)*(heigth+bump)){
        translate([93.05,13.9]){
        rotate(-3){
          difference(){
            difference(){
              union(){
                circle(4);
                translate([-4,0,0]){
                  square(8, center=true);
                }
              }
              translate([-18.3,-14.9]){
                rotate(25){
                  square(20);
                }
              }
            }
            circle(4-support_thickness);
            translate([-4+support_thickness,0,0]){
              square(8-2*support_thickness, center=true);
            }
          }
        }
        }
      }
    
      
    for(y = [1:num-1]){
      translate([0,0,y*(heigth+bump)-support_bridge-bump]){  
        //support_bridge
        linear_extrude(support_bridge){

          translate([93.05,13.9]){
              rotate(-3){
              difference(){
                union(){
                  
                  circle(4);
                  translate([-4,0,0]){
                    square(8, center=true);
                  }
                }
                translate([-18.3,-14.4]){
                  rotate(27){
                    square(20);
                  }
                }
                
              }
            }
          }
          }
      }
    } 
  }
  
}



module cylinder_supports() {
  for(y = [0:len(support_locs)-1]){
    translate(support_locs[y]){
      color("#FFAA00"){
        cylinder(num*heigth+(num-1)*bump+extend_for_testing, 
                 cylinder_size, cylinder_size);
      }
    }
  }
}


//See https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Tips_and_Tricks#Create_a_mirrored_object_while_retaining_the_original
module mirror_copy(v = [1, 0, 0]) {
    children();
    mirror(v) children();
}