/******************************************************************
 *                                                                 *
 * FlowFlexure Microscope: tube holder                             *
 *                                                                 *
 * (c) Sebastian Wendel, 2023                                      *
 * Released under the CERN Open Hardware License                   *
 *                                                                 *
 ******************************************************************/

$fn = 100;

case_thickness = 3;

tube_count = 3;
tube_radius = 15;
tube_height = 20;

module hook()
{
	translate([ 23.5, -(tube_height + case_thickness * 1.5), tube_height - case_thickness ])
	rotate([ 0, 90, 0 ])
	{
		linear_extrude(tube_height)
		{
			square([ tube_height - case_thickness, case_thickness ]);
			rotate([ 0, 0, 90 ])
			square([ case_thickness * 2.5, case_thickness ]);
		}
	}
}

module tube_holes(radius = tube_radius)
{
	circle(radius);

	translate([ (tube_radius * 2) + case_thickness, 0, 0 ])
	circle(radius);

	translate([ ((tube_radius * 2) + case_thickness) * 2, 0, 0 ])
	circle(radius);
}

module tube_holder_base()
{
	difference()
	{
		hull()
		{
			tube_holes(tube_radius + (case_thickness));
		}
		tube_holes();
	}
}

module tube_holder()
{
	linear_extrude(tube_height)
	{
		tube_holder_base();
	}
	hook();
}

tube_holder();