Worldbox - OpenProcessing

mySketch
xxxxxxxxxx
 
const boxSize = 8;
const worldSize = 50;
const seaLevel = 30;
​
const trees = new Set();
const treeCount = 10;
​
function setup() {
  createCanvas(windowWidth, windowHeight, WEBGL);
  background(100, 160, 140);
  frameRate(15);
  smooth();
​
  for (let i = 0; i < treeCount; i++) {
    trees.add(round(random(worldSize)) + worldSize * round(random(worldSize)));
  }
}
​
function draw() {
  push();
  rotateX(-PI / 6);
  rotateY(PI / 3);
  translate(
    (-boxSize * worldSize) / 2,
    (boxSize * worldSize) / 2,
    (-boxSize * worldSize) / 2
  );
​
  const i = frameCount;
  for (let z = 0; z < worldSize; z++) {
    // checkBoundaryAndDraw(i / worldSize, i % worldSize, z)
    for (let y = 0; y < worldSize; y++) {
      checkBoundaryAndDraw(i, y, z);
    }
  }
​
  pop();
}
​
function checkBoundaryAndDraw(x, y, z) {
  const check =
    0 <= x &&
    x < worldSize &&
    0 <= y &&
    y < worldSize &&
    0 <= z &&
    z < worldSize;
  if (check) {
    drawBlock(worldSize - x, y, z, calcColor(worldSize - x, y, z));
  }
}
​
function getHeight(x, z) {
  return map(noise(x / 20, z / 20), 0, 1, worldSize / 4, worldSize);
}
​
function calcColor(x, y, z) {
  const h = getHeight(x, z);
  if (h <= y) {
    if (y < seaLevel) {
      trees.delete(x + worldSize * z);
      return color(0, 20, 100 + y * 4, 170); // water
    } else if (trees.has(x + worldSize * z)) {
      if (y < h + 3) {
        return color(150, 130, 50); //tree
      }
      if (y < h + 5) {
        return color(0, 100, 0);
      }
      return null;
    } else {
      return null; // air
    }
  }
  if (h - 10 > y) {
    // underground
    if (noise(x / 5 + 2314, z / 5 + 0123, y / 5 + 1483) > 0.6) {
      return 50; // granite
    }
    if (noise(x / 10 + 31053, z / 10 + 41534, y / 10 + 13532) > 0.7) {
      return color(180 + y * 4, 0, 0); // lava
    }
    if (y < 8 && random() > 0.999) {
      return color(100, 200, 255); // diamond
    }
  }
  if (y < noise(x + 300, z + 300) * 5 + 1) {
    return 20; // bedrock
  }
  if (h - 1 < y) {
    if (y < seaLevel) {
      return color(200, 200, 0); //sand
    } else {
      return color(20, 100 + y * 3, 20); // grass
    }
  }
  if (h - noise(x - 320, z - 300) * 5 - 5 < y) {
    return color(150, 130, 50); // dirt
  }
  return 100; // stone
}
​
function drawBlock(x, y, z, c) {
  if (c === null) return;
  push();
  translate(x * boxSize, -y * boxSize, z * boxSize);
  strokeWeight(0.1);
  fill(c);
  box(boxSize);
  pop();
}
​