/**
Copyright (C)  2013  František Kučera (frantovo.cz).
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3
or any later version published by the Free Software Foundation;
with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
A copy of the license is included in the section entitled "GNU
Free Documentation License".
*/

vyska = 1.2;
delka = 80;
sirka = 20;

sikmaHrana = sqrt(pow(sirka,2)/2);

echo(sikmaHrana);



module roh() {
	translate([0,sirka/2,vyska/2])
	rotate([0,0,45])
		difference() {
			cube([sikmaHrana, sikmaHrana, vyska], center=true);
			//cube([sikmaHrana/2, sikmaHrana/2, vyska*2], center=true);
			cylinder(r=sirka/8, h=vyska*2, $fn=80, center=true);
		}
}

module obdelnik() {
	cube([delka,sirka,vyska]);
}

module text() {
	translate([12, 3.5, 0])
	scale([40,40,5])
	linear_extrude(height = 1.2, center = true, convexity = 10) {
		import(file="i1984.dxf");
	}
}

rotate([0,180,0])
union() {
	difference() {
		obdelnik();
		translate([0,0,-vyska/2])
			scale([1,1,2])
				hull()
					roh();
		text();
	}
	roh();
}