$fn=64;

// Parametric dimensions
base_length = 15.0;
base_width = 10.0;
base_thickness = 1.5;
cable_diameter = 3.5; // Optimized for 2-4mm cables
wall_thickness = 2.0;
opening_gap = 1.5;    // Snug fit to snap in thin cables

// Center coordinate for the clip profile
center_y = base_thickness + cable_diameter / 2;

// Extrude the 2D profile to create the 3D clip
translate([0, -base_width / 2, 0])
linear_extrude(height=base_width) {
    difference() {
        // Main solid body
        union() {
            // Flat rectangular mounting base
            translate([-base_length / 2, 0])
                square([base_length, base_thickness]);

            // Curved top grip housing blended into the base
            hull() {
                translate([0, center_y])
                    circle(d=cable_diameter + 2 * wall_thickness);
                translate([-(cable_diameter / 2 + wall_thickness), 0])
                    square([cable_diameter + 2 * wall_thickness, base_thickness]);
            }
        }

        // Inner cable cutout
        translate([0, center_y])
            circle(d=cable_diameter);

        // Vertical opening gap for cable insertion
        translate([-opening_gap / 2, center_y])
            square([opening_gap, cable_diameter + wall_thickness + 1]);

        // V-shaped entry flare to easily guide the cable in
        translate([0, center_y + cable_diameter / 2 - 0.2])
            polygon([
                [-opening_gap / 2, 0],
                [opening_gap / 2, 0],
                [opening_gap / 2 + 2.5, wall_thickness + 1],
                [-opening_gap / 2 - 2.5, wall_thickness + 1]
            ]);
    }
}