// A mnemonic for the Bloch sphere with X, Y and Z cut into it.
// Created for FutureLearn Introduction to Quantum Computing, 10/2017
Letter_Height=100;
Line_Height=2;
Line_Width=2;

//The size the letters are
font_size = 20;//[1:50]

//Note: not all fonts may work
text_font = "Arial:style=Bold";

// Placement marks
XLeft = -80;
XMidLeft = -50;
XMidMidLeft = -15;
XMid = 10;
YUp = 30;
YMid = 0;

XRight = 80;
XMidRight = 50;
YDown = -35;

// for the holes we're cutting
HoleQuality = 50;

module PlaceLetter(ThisChar, x, y, z=0)
  {
  translate([x-5,y-4,z]){
    linear_extrude(height = Letter_Height, convexity = 10){
		   text(ThisChar, font = text_font, size =   font_size);
	}
  }
};

MyRad = 25;

module MyAxes() {
       union() {
       translate([-font_size/2, -font_size/2, -MyRad*1.05])
         linear_extrude(height = MyRad*2.1, convexity = 10){
		   text("Z", font = text_font, size =   font_size);
	};
	rotate([90,0,0])
     translate([-font_size/2, -font_size/2, -MyRad*1.05])
         linear_extrude(height = MyRad*2.1, convexity = 10){
		   text("Y", font = text_font, size =   font_size);
	};
	rotate([0,90,0])
	 rotate([0,0,90])
     translate([-font_size/2, -font_size/2, -MyRad*1.05])
         linear_extrude(height = MyRad*2.1, convexity = 10){
		   text("X", font = text_font, size =   font_size);
	};
	};
};

// MyAxes();

rotate([45,0,0])
difference() {
     sphere(r = MyRad);
     MyAxes();
}