// CyberDeck case — SLAB (tablet-style)
// Single flat rectangular slab: display front-facing, keyboard recessed
// below it on the same plane (Sinclair QL / Cyberdeck "slab" aesthetic),
// Pi + LoRa board sandwiched in a rear cavity behind a removable back plate.
// Fits: Raspberry Pi 4/5, Meshtastic-class LoRa board, 5-7" DSI/HDMI display,
// BB Q10/Q20-class keyboard. See ../bom.json for source hardware.
//
// Print settings: 0.24mm layer height, 20% infill, no supports needed
// (fully flat geometry, print face-down). ABS or PETG for outdoor UV
// tolerance if this deck lives on a desk near a window.
//
// Compile: openscad -o slab.stl slab.scad

pi_w = 85;  pi_d = 56;  pi_h = 17;
lora_w = 51; lora_d = 26; lora_h = 14;
disp_w = 194; disp_d = 110; disp_h = 20;
kb_w = 116; kb_d = 43; kb_h = 10;

wall = 3;
gap  = 3;
rear_h = pi_h + lora_h + wall*2 + 4;   // rear cavity depth, stacked

slab_w = disp_w + 2*(wall+gap);
slab_d = disp_d + kb_d + 3*(wall+gap);
slab_front_h = 8;   // thin front bezel thickness

module rounded_rect(w,d,r=2) {
  hull() for (x=[r,w-r]) for (y=[r,d-r])
    translate([x,y]) circle(r=r,$fn=32);
}

module front_face() {
  linear_extrude(height=slab_front_h) {
    difference(){
      rounded_rect(slab_w, slab_d, 3);
      // display cutout, top
      translate([wall+gap, wall+gap]) square([disp_w, disp_d]);
      // keyboard cutout, bottom
      translate([wall+gap, disp_d + 2*(wall+gap)]) square([kb_w, kb_d]);
    }
  }
  // wordmark engraved along the bottom edge, front face
  translate([slab_w/2, slab_d-6, slab_front_h])
    linear_extrude(height=0.5)
      text("PERFECT WORLD PROJECT — CYBERDECK", size=3.6, halign="center",
           valign="center", font="Liberation Mono:style=Bold");
}

module rear_tray() {
  difference() {
    union(){
      linear_extrude(height=wall)
        rounded_rect(slab_w, slab_d, 3);
      // walls
      translate([0,0,wall])
        linear_extrude(height=rear_h)
          difference(){
            rounded_rect(slab_w, slab_d, 3);
            translate([wall, wall]) rounded_rect(slab_w-2*wall, slab_d-2*wall, 2);
          }
    }
    // cable pass-through slot between display bay and Pi bay
    translate([slab_w/2-10, wall+gap+disp_d-2, wall+2])
      cube([20, 8, rear_h]);
  }
  // component standoff posts for the Pi (4-hole pattern, approx spacing)
  for (p=[[wall+8,wall+8],[wall+8+58,wall+8],[wall+8,wall+8+49],[wall+8+58,wall+8+49]])
    translate([p[0], p[1], wall])
      cylinder(r=2.5, h=6, $fn=24);
  // LoRa board mount ledge
  translate([wall+6, slab_d-wall-lora_d-6, wall])
    cube([lora_w, lora_d, 4]);
}

module back_plate() {
  linear_extrude(height=wall) rounded_rect(slab_w-1, slab_d-1, 3);
  // large embossed badge on the outside face — this is the panel a builder
  // sees when the slab is face-down on a table
  translate([slab_w/2, slab_d/2, wall])
    linear_extrude(height=0.8) {
      text("PERFECT WORLD", size=9, halign="center", valign="baseline",
           font="Liberation Sans:style=Bold");
      translate([0,-11]) text("PROJECT · CYBERDECK", size=5, halign="center",
           valign="baseline", font="Liberation Sans:style=Bold");
    }
}

translate([0,0,0]) front_face();
translate([slab_w+15, 0, 0]) rear_tray();
translate([2*(slab_w+15), 0, 0]) back_plate();