/// ARRAY SIZE

// size of the array
num_hdd_x = 4;
num_hdd_y = 5;


/// PRINTER SPECIFICATION

// assumed space deviation of the resulting form; used to leave space
// in holes so that screws and rods do not stuck
pla_epsilon = 0.05;


/// PRIMARY DIMENSIONS

// width of vertical and horizontal bars
vrail_width = 15;
hrail_height = 15;

// depth of front and back
front_depth = 15;
back_depth = 6;

// length hdd is standing out to be grabbed
hdd_standout = 15;

// dimensions of the L-shaped rail between front and back
rail_width = 21;
rail_height = rail_width;
rail_thickness = 2;

// width and height of the horizontal support bar (U-shaped metal)
support_bar_width = 10 + pla_epsilon;

// width of the SATA power cable (including some extra space for
// navigation)
spc_width=3;


/// HDD SIZE (from spec)

// dimensions of HDDs; not model-specific
hdd_width = 101.6 + pla_epsilon;
hdd_height = 25.4 + pla_epsilon;
hdd_length = 146;


/// OPENSCAD HACKS

$fn = 180;

// a length larger than any constructed feature; use to simulate
// infinitely long structures (for difference operations)
large = 1000;

// A small quantity that does not change the print results. Use to
// displace surfaces of CSG operations to prevent them from overlapping.
epsilon = 0.0001;


/// COMPUTED DIMENSIONS

tray_width = hdd_width + vrail_width/2;
tray_height = hdd_height + hrail_height;

connector_width = vrail_width - 2*(1 + rail_thickness);


/// COMMON FUNCTIONS
// they do not belong here but are not enough to warrant a seperate
// file. sorry

module ccube(x) cube(x, center=true);