[1, 1, 1],

  [-1, 1, 1],

  [1, -1, 1],

  [-1, -1, 1],

  [1, 1, -1],

  [-1, 1, -1],

  [1, -1, -1],

  [-1, -1, -1],

];

​

const edges = [

  [0, 1],

  [0, 2],

  [0, 4],

  [2, 3],

  [1, 3],

  [2, 6],

  [4, 5],

  [4, 6],

  [1, 5],

  [6, 7],

  [5, 7],

  [3, 7],

];

​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(20);

  let camera_pos = createVector(2, 3, 5);

  let cx = camera_pos.x;

  let cy = camera_pos.y;

  let cz = camera_pos.z;

  let focal_distance = 1;

  stroke(255);

  // translate(0, height*0.9);

  scale(width);

  translate(0, 1);

  scale(1, -1);

  strokeWeight(0.005);

  for(let edge of edges) {

    const [p1, p2] = edge;

    line(

      (vertices[p1][0] - cx)*focal_distance/(vertices[p1][2]-cz),

      (vertices[p1][1] - cy)*focal_distance/(vertices[p1][2]-cz),

      (vertices[p2][0] - cx)*focal_distance/(vertices[p2][2]-cz),

      (vertices[p2][1] - cy)*focal_distance/(vertices[p2][2]-cz)

    );

  }

}