$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 */

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;

fin_width        =  2.0000;
fin_gap_width    =  2.0000;
fin_gap_length   =  2.0000;
fin_gap_height   = 12.0000;
fin_gap_count    = 33;
fin_gap_x_first  = keyboard_x_offset + keyboard_width - fin_gap_count * (fin_width + fin_gap_width);
fin_gap_y_offset = case_length_bottom - fin_gap_length;

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);
    }
    
    for (i = [0:fin_gap_count]) {
        x = fin_gap_x_first + (i * (fin_width + fin_gap_width));
        
        translate([x, fin_gap_y_offset, 0])
        square([fin_gap_width, fin_gap_length], false);
    }
}