$fn = 72;

pcb_width  = 257.175;
pcb_height =  95.250;
 
module keyboard_base_plate(pcb_width, pcb_height) {
    pcb_clearance_edge   = 1.0;
    pcb_clearance_bottom = 2.0;

    corner_radius = 0.5;

    module corner(translation, rotation) {
        translate(translation)
        rotate(rotation)
        rotate_extrude(angle=90) {
            intersection() {
                circle(r=corner_radius);
                square(corner_radius*2);
            }
        }
    }

    module edge(length, translation, rotation) {
        translate(translation)
        rotate(rotation)
        linear_extrude(length)
        intersection() {
            circle(r=corner_radius);
            square(corner_radius*2);
        }
    }

    /* Lower left rounded corner */
    corner([0, 0, 0], [-90, 90, 90]);

    /* Upper left rounded corner */
    corner([0, pcb_height, 0], [0, 90, 90]);

    /* Upper right rounded corner */
    corner([pcb_width, pcb_height, 0], [90, 90, 90]);

    /* Lower right rounded corner */
    corner([pcb_width, 0, 0], [180, 90, 90]);

    /* Top edge */
    edge(pcb_width, [0, pcb_height, 0], [0, 90, 0]);

    /* Right edge */
    edge(pcb_height, [pcb_width, 0, 0], [270, 0, 0]);

    /* Bottom edge */
    edge(pcb_width, [0, 0, 0], [90, 180, 90]);

    /* Left edge */
    edge(pcb_height, [0, 0, 0], [270, 90, 0]);

    linear_extrude(corner_radius*2);
    square([pcb_width, pcb_height], false);
}

keyboard_base_plate(pcb_width, pcb_height);