sliced-hex-gapped-six.js

function main() {
  var shapes = [];

  for (var i = 0; i < 7; i++) {
    for (var j = 0; j < 7; j++) {
      if (Math.random() > 0.25)
        shapes.push(hex(1 + 5 * cos(20 * (3 - i)) * cos(20 * (3 - j)), i, j));
    }
  }

  return union(shapes);
}

var pit = Math.PI / 3;
var dv = Math.sin(pit);
var dh = 1;

function hex(h, x, y) {
  var dx, dy;
  if (x % 2 == 0) {
    dx = x * 1.5 * dh;
    dy = y * 2 * dv;
  } else {
    dx = x * 1.5 * dh;
    dy = y * dv * 2 + dv;
  }
  return translate(
    [dx, dy, 0],
    difference(
      linear_extrude(
        { height: h },
        polygon([
          [1, 0],
          [Math.cos(pit), Math.sin(pit)],
          [-Math.cos(pit), Math.sin(pit)],
          [-1, 0],
          [-Math.cos(pit), -Math.sin(pit)],
          [Math.cos(pit), -Math.sin(pit)]
        ])
      ),
      slice(h)
    )
  );
}

function slice(h) {
  return Math.random() > 0.5
    ? translate(
        [1, 0, h + 1],
        rotate([0, 22.5, 0], cube({ size: [4, 4, 4], center: true }))
      )
    : translate(
        [0, -1, h + 1],
        rotate([22.5, 0, 0], cube({ size: [4, 4, 4], center: true }))
      );
}