eps = 0.01;

// Q6 lens dimensions
yellow_ring_d = 19.5 + 0.5;
yellow_ring_h = 3.5;

view_angle = 95;

hood_h = 20;
hood_top_d = 30;

lens_d = 15;
wall = 1.5;
rectangle_h = 80;
rectangle_w2h = 1.777;

rect_d2 = rectangle_h * tan(view_angle/2);
rect_x = 2*rect_d2/sqrt(1+rectangle_w2h*rectangle_w2h);
rect_y = rectangle_w2h * rect_x;
$fn = 128;
difference() {
	// body
	hull() {
		cylinder(r = yellow_ring_d/2 + wall, h = yellow_ring_h);
		translate([0, 0, hood_h-eps])
			cylinder(r = hood_top_d/2 + wall, h = eps);
	}
	translate([0, 0, -eps])
		cylinder(r = yellow_ring_d/2, h = yellow_ring_h+2*eps);
	// walls of the cone
	hull() {
		translate([0, 0, yellow_ring_h])
			cylinder(r = yellow_ring_d/2, h = eps);
		translate([0, 0, hood_h])
			cylinder(r = hood_top_d/2, h = eps);
	}
	hull() {
		cylinder(r = lens_d/2, h = eps);
		// translate([0, 0, rectangle_h])
		// 	cylinder(r = rect_d2 - 5, h = eps);
		translate([-rect_x/2, -rect_y/2, rectangle_h])
			cube([rect_x, rect_y, eps]);
	}

}