/**
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".
*/

stena = 1.4;
vyska = 10;

vnejsiPrumer = 40; // velikost kola
prumerOsy = 6.9;   // průměr díry

module paprsek() {
	translate([prumerOsy/2,-stena/2,-vyska/2]) {
		cube([vnejsiPrumer/2 - prumerOsy/2 - 1,stena,vyska]);
	}
}

difference() {
	cylinder(r = vnejsiPrumer/2, h = vyska, center = true);
	cylinder(r = vnejsiPrumer/2 - stena, h = vyska+1, center = true);
	translate([(vnejsiPrumer+stena)/2,(vnejsiPrumer+stena)/2,0]) {
		cube(vnejsiPrumer,vnejsiPrumer,vyska+1, center=true);
		// Pac-Man !!!
	}
}

difference() {
	cylinder(r = prumerOsy/2 + stena, h = vyska, center = true);
	cylinder(r = prumerOsy/2, h = vyska+1, center = true);
}

rotate(a=[0, 0,  0]) paprsek();
rotate(a=[0, 0, 90]) paprsek();