$fn=128;

// --- Pocket Hole Jig Parameters ---
jig_width      = 45;       // Total width of the jig
jig_length     = 100;      // Total length of the main block
jig_height     = 22;       // Thickness of the main block
hole_spacing   = 22;       // Distance between the two drill holes
drill_dia      = 10.0;     // 9.5mm (3/8") bit + 0.5mm clearance
angle          = 15;       // Standard pocket hole angle in degrees
lip_length     = 15;       // Depth of the registration lip
lip_thickness  = 8;        // Thickness of the registration lip
exit_offset    = 15;       // Distance from the wood edge to the hole exit

module pocket_hole_jig() {
    difference() {
        // --- Main Body ---
        union() {
            // Main block resting on the wood
            translate([-jig_width/2, 0, 0])
                cube([jig_width, jig_length, jig_height]);

            // Registration lip (hooks over the edge of the wood)
            translate([-jig_width/2, -lip_thickness, -lip_length])
                cube([jig_width, lip_thickness + 0.1, lip_length + jig_height]);
        }

        // --- Drill Guide Holes ---
        for (i = [-1, 1]) {
            translate([i * hole_spacing/2, exit_offset, 0])
                rotate([angle, 0, 0])
                    rotate([-90, 0, 0])
                        translate([0, 0, -15]) // Shift to cut cleanly through bottom
                            cylinder(h=150, d=drill_dia);
        }

        // --- Chip Clearance Cutouts ---
        // Allows wood chips to escape at the bottom so the drill doesn't jam
        for (i = [-1, 1]) {
            translate([i * hole_spacing/2, exit_offset + 5, -1])
                scale([1, 2.5, 1])
                    cylinder(h=6, d=drill_dia * 1.2);
        }

        // --- Centerline Alignment Notch ---
        // Helps align the jig with marks on the wood
        translate([0, -lip_thickness/2, -lip_length/2])
            cube([1.5, lip_thickness + 2, lip_length + 2], center=true);
    }
}

// Render the jig
pocket_hole_jig();