botc token tiles

botc_token_tile-v0.5.scad

// Blood on the Clocktower - Token Storage Tile (Square)
// Parametric single-piece layered holder for 3D printing
// Printer: Snapmaker U1, Slicer: Snapmaker Orca

/* ── Token dimensions (official + tolerance) ── */
role_token_dia     = 44.5;
reminder_token_dia = 25.5;
token_tolerance    = 0.8;    // ~0.4mm clearance per side

role_cavity_dia     = role_token_dia + token_tolerance;       // 45.3mm
reminder_cavity_dia = reminder_token_dia + token_tolerance;   // 26.3mm
role_r     = role_cavity_dia / 2;     // 22.65
reminder_r = reminder_cavity_dia / 2; // 13.15

/* ── Layer thicknesses ── */
base_thickness  = 1.25;  // 0.25 first layer + 5×0.2
reminder_depth  = 1.8;   // 9×0.2
role_depth      = 2.0;   // 10×0.2

total_height = base_thickness + reminder_depth + role_depth; // 5.2mm

/* ── Structural ── */
wall_min        = 1.2;  // min wall from cavity to tile edge
cavity_wall_min = 0.8;  // min wall between adjacent reminder cavities
finger_scoop_dia = 10;  // finger notch between reminder cavities

/* ── Reminder layout ── */
num_reminders = 2;

corner_r = 2.0;  // outer edge rounding

// Two reminders along the diagonal of the square.
// Center-to-center distance must be >= reminder_cavity_dia + cavity_wall_min.
min_center_dist = reminder_cavity_dia + cavity_wall_min;  // 27.1mm
half_dist = min_center_dist / 2;  // 13.55mm

// Each reminder center is at (±half_dist/sqrt(2), ±half_dist/sqrt(2))
diag_offset = half_dist / sqrt(2);  // ~9.58mm

// Tile half-size: must contain reminders AND role cavity
tile_half_for_reminders = diag_offset + reminder_r + wall_min;  // ~23.93
tile_half_for_role = role_r + wall_min;                          // ~23.85
tile_half = max(tile_half_for_reminders, tile_half_for_role);
tile_size = 2 * tile_half;

// Reminder positions along the diagonal
reminder_pos = [[ diag_offset,  diag_offset],    // top-right
                [-diag_offset, -diag_offset]];    // bottom-left

/* ── Rounded square helper ── */
module rounded_square(size, height, r) {
    linear_extrude(height)
        offset(r = r)
            square([size - 2*r, size - 2*r], center = true);
}

/* ── Main geometry ── */
module tile() {
    difference() {
        // Solid body: rounded square
        rounded_square(tile_size, total_height, corner_r);

        // Role token cavity: centered, top layer
        translate([0, 0, base_thickness + reminder_depth])
            cylinder(d = role_cavity_dia, h = role_depth + 0.01, $fn = 80);

        // Reminder token cavities: bottom layer, along diagonal
        for (pos = reminder_pos) {
            translate([pos[0], pos[1], base_thickness])
                cylinder(d = reminder_cavity_dia, h = reminder_depth + 0.01, $fn = 60);
        }

        // Pass-through holes: cut through role layer above each reminder
        for (pos = reminder_pos) {
            translate([pos[0], pos[1], base_thickness + reminder_depth - 0.01])
                cylinder(d = reminder_cavity_dia, h = role_depth + 0.02, $fn = 60);
        }

        // Finger scoop: small notch at the midpoint between the two
        // reminder cavities, cut from base through the full height,
        // so you can get a fingertip under a token edge
        translate([0, 0, base_thickness])
            cylinder(d = finger_scoop_dia, h = total_height, $fn = 40);
    }
}

tile();

// ── Console diagnostics ──
echo(str("Tile size: ", tile_size, "mm square"));
echo(str("Total height: ", total_height, "mm"));
echo(str("Diagonal offset: ", diag_offset, "mm per axis"));
echo(str("Reminder center-to-center: ", min_center_dist, "mm"));