// CyberDeck case — TYPEWRITER
// Angled-riser aesthetic: keyboard sits low and forward, display is
// propped up and back at a fixed 35 degree typing angle on two side
// pylons (classic "cyberdeck" convention borrowed from portable
// typewriter proportions). Pi + LoRa board live in the riser base under
// the display, ahead of the keyboard well.
// 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: 0.2mm layer height, 30% infill (the display pylons carry
// load and want more infill than the base tray), supports ON under the
// overhanging display shelf. PLA is fine; this design has no exposed hinge.
//
// Compile: openscad -o typewriter.stl typewriter.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;
tilt = 35;                 // display angle, degrees off horizontal
pylon_h = 70;               // pylon height at the back
base_w = max_(kb_w, disp_w) + 2*(wall+gap);
base_d = kb_d + pi_d + lora_d + 4*(wall+gap);
base_h = pi_h + wall + 6;

function max_(a,b) = a > b ? a : b;

module base_tray() {
  difference(){
    cube([base_w, base_d, base_h]);
    translate([wall, wall, wall])
      cube([base_w-2*wall, base_d-2*wall, base_h]);
    // keyboard well, front
    translate([(base_w-kb_w)/2, wall+gap, wall])
      cube([kb_w, kb_d, kb_h+2]);
  }
  // Pi standoffs behind the keyboard well
  py = wall+gap+kb_d+gap;
  for (p=[[wall+8,py+8],[wall+8+58,py+8],[wall+8,py+8+49],[wall+8+58,py+8+49]])
    translate([p[0], p[1], wall])
      cylinder(r=2.5, h=6, $fn=24);
  // LoRa mount ledge, rear strip
  translate([wall+6, base_d-wall-lora_d-6, wall])
    cube([lora_w, lora_d, 4]);
  // front lip badge (embossed) — visible to the typist
  translate([base_w/2, wall+1, base_h])
    linear_extrude(height=0.6)
      text("PWP CYBERDECK", size=5, halign="center", valign="center",
           font="Liberation Sans:style=Bold");
}

module pylon(mirror_x=false) {
  // right-triangle side wall that carries the display shelf at `tilt`
  x = mirror_x ? -1 : 1;
  points = [[0,0],[0,pylon_h],[pylon_h/tan(90-tilt),0]];
  linear_extrude(height=wall)
    polygon(points=[[0,0],[0,pylon_h], [pylon_h*cos(tilt)/sin(tilt),0]]);
}

module display_shelf() {
  // angled shelf the display sits on, between the two pylons
  shelf_w = disp_w + 2*gap;
  translate([0,0,0])
    rotate([tilt-90,0,0])
      difference(){
        cube([shelf_w, disp_d+2*wall, wall]);
        translate([wall, wall, -1]) cube([shelf_w-2*wall, disp_d, wall+2]);
      }
}

// assemble: base, then pylons + shelf offset behind it in the layout
translate([0,0,0]) base_tray();

translate([base_w+20, 0, 0]) {
  pylon();
  translate([0, base_d-wall, 0]) mirror([1,0,0]) translate([-wall,0,0]) pylon();
}
translate([base_w+20, base_d/2 - (disp_d+2*wall)/2, pylon_h*0.9])
  display_shelf();

// wordmark engraved into the display shelf underside — visible when the
// deck is folded flat for transport
translate([base_w+20+ (disp_w+2*gap)/2, base_d/2, 0.5])
  rotate([tilt-90,0,0])
    linear_extrude(height=0.5)
      text("PERFECT WORLD PROJECT", size=4, halign="center", valign="center",
           font="Liberation Sans:style=Bold");