$fn = 72;

case_width_top     = 317.5000;
case_width_bottom  = 320.0000;
case_length_top    = 150.0000;
case_length_bottom = 151.5000;

wall_width  =  2.5000;
wall_height = 17.2500;

accent_width    =  1.0000;
accent_height   = 0.5;
accent_y_stride = 19.0500;
accent_y_bottom = 12.0000;
/* last accent is 4mm from top of case */

fin_width     =  2.0000;
fin_length    =  2.0000;
fin_height    = 12.0000;
fin_gap_width =  2.0000;
fin_x_stride  =  2.0000;
fin_x_first   = 139.7500;
fin_count     = 32;

key_switch_width  = 19.0500;
key_switch_length = 19.0500;
keyboard_width    = key_switch_width  * 13.5;
keyboard_length   = key_switch_length *  5.0;
keyboard_x_offset = 12.2500;
keyboard_y_offset = 12.2500;

difference() {
    square([case_width_bottom, case_length_bottom], false);
    translate([keyboard_x_offset, keyboard_y_offset, 0])
    square([keyboard_width, keyboard_length], false);

    for (y = [accent_y_bottom: accent_y_stride: case_width_bottom]) {
        translate([0, y, 0])
        square([case_width_bottom, accent_width], false);
    }
}