//CC BY NC 4.0
// Attribution :
// - Luc Hanneuse, author, conception, realisation, OpenScad design, optimisation for 3D printing & documentation.
// - Florent Lemaire for OpenScad help
// AgriLab, http://agrilab.unilasalle.fr/ , Innovation Center & FabLab Collaborative innovation for Agriculture
// Name : Bpex, Boitier Parametrique Extérieur
// Contact for other licences or commercial usage : agrilab@unilasalle.fr
// Inspired by the Stevenson screen
$fn = 100;

// unit in mm
shell = 0.4 * 4; // multiple of the printer's nozzel size, here 0.4
sizeBase = 60/2; // bottom radius
sizeTop = 45/2; // top radius
pinInsideSize = 3.2; // Thread diameter
numberOfPin = 2; // number of thread
height= 15; // height
fixture_radius = 45/2; // radius for the thread position
hat_height= 12; // height of the hat
fixture_height = height + 5; // height of the fixture

difference() {
cylinder(r1=sizeBase, r2=sizeTop, h=height, center=true);
cylinder(r1=sizeBase-shell, r2=sizeTop-shell, h=height, center=true);
	for (p = [0:numberOfPin-1]) {
		rotate([0,0,p*360/numberOfPin]) {
		    translate([fixture_radius,0,2.5]) {
		            cylinder(r=pinInsideSize, h=fixture_height, center=true);
		    }
		}
	}
}

for (p = [0:numberOfPin-1]) {
	rotate([0,0,p*360/numberOfPin]) {
	    translate([fixture_radius,0,2.5 ]) {difference() {
	            cylinder(r=pinInsideSize+shell, h=fixture_height, center=true);
	            cylinder(r=pinInsideSize, h=fixture_height, center=true);
	        }
	    }
	}
}


// hat
translate([0,0,height/2 + hat_height / 2 - shell]) {
    difference() {

            difference() {
                                translate( [0, 0, shell] ){cylinder(r1=sizeTop, r2=0, h=hat_height, center=true);}
                                cylinder(r1=sizeTop-(shell/2), r2=0, h=hat_height+shell, center=true);
                            }
                            
            
            for (p = [0:numberOfPin-1]) {
            rotate([0,0,p*360/numberOfPin]) {
                translate([fixture_radius,0,2.5 ]) {
                        cylinder(r=pinInsideSize, h=fixture_height, center=true);
                    }
                }
            }
        }
        
}