// Diffuser for ZHISHUNJIA ZSJ-T29 LED flashlight (dx.com SKU #317226).
infty = 100;
eps = 0.01;

diaphragm = 0.5; // diaphragm thickness
wall = 1.5;

ring_h = 12; // the height of the body
ring_d = 34.3 + 1.0; // the lens ring diameter + tolerance

clip_h = 7.3 + 1.0; // height of the clip above the diaphragm
clip_dist = 1.5;
clip_size = 1.2;


module diffuser() {
	difference() {
		cylinder(r = ring_d/2 + wall, h = ring_h);
		translate([0, 0, diaphragm])
			cylinder(r = ring_d/2, h = ring_h);
		for (angle = [0:120:360]) rotate([0,0,60+angle]) {
			translate([0, 0, 20+clip_h])
			rotate([0, 90, 0])
				cylinder(r=20, h=infty);
		}
	}
	for (angle = [0:120:360]) rotate([0,0,angle]) {
	 	intersection() {
			hull() {
				translate([ring_d/2-clip_dist, -infty/2, clip_h])
					cube([infty, infty, clip_size]);
				translate([ring_d/2+wall/2, -eps/2, ring_h+wall])
					cube([eps, eps, eps]);
			}
			cylinder(r = ring_d/2 + wall/2, h = ring_h);
		}
	}
}

diffuser();