// Original CooperLux demonstration. Millimetres. Not yet physically printed.
// Flat-backed label with raised text; no laser or AMS is required for one colour.
// Example: openscad -D 'label="TOOLS"' -o tools.stl equipment-label.scad
label = "COOPERLUX";
length = 110;
width = 30;
base_thickness = 3;
letter_height = 1.2;
font_size = 8;
hole_diameter = 4;
hole_offset = 7;
$fn = 48;

assert(len(label) >= 1 && len(label) <= 10, "Sample accepts 1-10 characters.");
assert(length >= 110 && length <= 200 && width >= 30 && width <= 100);
assert(base_thickness >= 2 && letter_height >= 0.8 && font_size > 0 && font_size <= 8);
assert(hole_diameter > 0 && hole_diameter < 8 && hole_offset >= 6);
assert(hole_offset < length / 4);

union() {
    difference() {
        cube([length, width, base_thickness]);
        for (x = [hole_offset, length - hole_offset])
            translate([x, width / 2, -0.1])
                cylinder(h = base_thickness + 0.2, d = hole_diameter);
    }
    translate([length / 2, width / 2, base_thickness - 0.1])
        linear_extrude(height = letter_height + 0.1)
            text(label, size = font_size, font = "DejaVu Sans:style=Bold",
                 halign = "center", valign = "center");
}