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/// ARRAY SIZE
// size of the array
num_hdd_x = 4;
num_hdd_y = 4;
/// 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 = 20;
rail_height = rail_width;
rail_thickness = 2;
/// HDD SIZE (from spec)
// dimensions of HDDs; not model-specific
hdd_width = 101.6;
hdd_height = 25.4;
hdd_length = 146;
/// 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 = 0.1;
/// COMPUTED VARIABLES
// dimension of a single hdd tray (hdd + space around)
tray_height = hdd_height + max(cooling_height, 2 * bar_thickness + 10 * pla_epsilon);
tray_width = hdd_width + bar_thickness;
tray_length = hdd_length - hdd_standout;
/// OPENSCAD HACKS
// 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;
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