Added a scad code to generate letters with a hole in them to make a necklace out of

bitmap/letter_necklace.scad

@@ -0,0 +1,59 @@
+/*
+Parametric letters for for a necklace
+Elmo Mäntynen <elmo.mantynen@iki.fi>
+LGPL 2.1
+*/
+
+include <bitmap.scad>
+
+// change chars array and char_count
+// OpenSCAD has no string or length methods :(
+chars = ["M","a","k","e","r","B","o","t"];
+char_count = 8;
+
+// block size 1 will result in 8mm per letter
+block_size = 2;
+// height is the Z height of each letter
+height = 3;
+
+//Hole for the necklace
+hole_diameter = 5;
+
+module 8bit_str(chars, char_count, block_size, height) {
+	echo(str("Total Width: ", block_size * 8 * char_count, "mm"));
+	union() {
+		for (count = [0:char_count-1]) {
+			translate(v = [0, count * block_size * 8, 0]) {
+				8bit_char(chars[count], block_size, height);
+			}
+		}
+	}
+}
+
+module letter(char, block_size, height, hole_diameter) {
+	union() {
+		translate(v = [0,0, hole_diameter*1.3]) {
+			8bit_char(char, block_size, height);
+		}
+		translate(v = [0,0,(hole_diameter*1.3)/2]) {
+			color([0,0,1,1]) {
+				difference() {
+					cube(size = [block_size * 8, block_size * 8, hole_diameter+2], center = true);
+					rotate([90, 0, 0]) cylinder(h = block_size * 8 + 1, r = hole_diameter/2, center = true);
+				}
+			}
+		}
+	}
+}
+
+matrix = [["O",  "L", "E", "N", "S",], 
+		[ "Y", "OE", "N", "Y", "T"]];
+
+union() {
+	for (column = [0:1]) {
+		for (row = [0:4]) {
+			translate(v=[column*(block_size*1.1)*8, row*(block_size*1.1)*8, 0])
+				letter(matrix[column][row], block_size, height, hole_diameter);
+		}
+	}	
+}