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include <parameters.scad>
use <side.scad>
function as(x, d) = (x-d)/x;
function inflow_outline(i, k=0.1) = (i > 0)
? concat(
[[i, (1 - exp(-i))/(1 - exp(-1))/2]],
inflow_outline(i-k),
[[i, (1 - exp(-i))/(1 - exp(-1))/-2]]
)
: [[0, 0]];
module inflow(W, R) {
rotate([90, 0, 0])
rotate([0, 90, 0])
linear_extrude(height = W, center=true)
scale(R)
polygon(inflow_outline(1));
}
module inflow_grid(W, H, RW, RH, offset) {
for (i = [1:num_hdd_y-1])
translate([0, 0, i*(hrail_height + hdd_height) + hdd_height/2 + offset])
difference() {
inflow(W, RW);
translate([0, 2.1, 0])
inflow(W, RW-2);
}
for (i = [-1,1])
translate([i*W/2, 0, H/2])
scale([RH/RW, 1, 1])
rotate([0, 90, 0])
difference() {
inflow(H, RW);
translate([0, 2.1, 0])
inflow(H-2, RW-2);
}
}
module entry(capped_bottom=true) {
W = hdd_length - hdd_standout;
O = capped_bottom ? 4 : hrail_height;
H = num_hdd_y * (hrail_height + hdd_height) + O;
D = vrail_width * 5 / 8;
S = 10;
R = hdd_height;
offset = 4;
difference() {
union() {
side_frame(W, D, H, S, capped_bottom, reinforce=false);
intersection() {
translate([0, -R + D/2, 0])
inflow_grid(W, H, R, (support_bar_width + front_depth/4)*2 + 2, offset);
ccube([W, large, large]);
}
}
ccube([2*W, large, 2*(hrail_height + hdd_height) + offset]);
// add joins ... a second time as they got lost somewhere on
// the way :-(
translate([0,D/20,0])
scale([1, 1.2, 1])
# joins(W, D);
}
}
rotate([-90, 0, 0])
entry();
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