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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Voxel Sandbox Mobile</title>
<style>
body { margin:0; overflow:hidden; background:black; }
#ui {
  position: fixed;
  bottom: 10px;
  width: 100%;
  text-align: center;
  color: white;
  font-family: sans-serif;
}
#crosshair {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 20px;
  color: white;
}
</style>
</head>
<body>

<div id="crosshair">+</div>
<div id="ui">Block: <span id="block">Grass</span></div>

<script src="https://cdn.jsdelivr.net/npm/three@0.158/build/three.min.js"></script>

<script>
// ===== SETUP =====
const scene = new THREE.Scene();
scene.background = new THREE.Color(0x87CEEB);

const camera = new THREE.PerspectiveCamera(75, innerWidth/innerHeight, 0.1, 1000);
const renderer = new THREE.WebGLRenderer();
renderer.setSize(innerWidth, innerHeight);
document.body.appendChild(renderer.domElement);

// LIGHT
const light = new THREE.DirectionalLight(0xffffff, 1);
light.position.set(50,100,50);
scene.add(light);

// ===== BLOCK TYPES =====
const BLOCK = {
  GRASS: 0,
  DIRT: 1,
  STONE: 2
};

const materials = [
  new THREE.MeshLambertMaterial({color: 0x00aa00}),
  new THREE.MeshLambertMaterial({color: 0x8B4513}),
  new THREE.MeshLambertMaterial({color: 0x888888})
];

// ===== WORLD =====
const world = {};
const size = 32;
const height = 16;

function noise(x,z){
  return Math.floor((Math.sin(x*0.2)+Math.cos(z*0.2))*2 + 6);
}

// generate terrain
for(let x=0;x<size;x++){
  for(let z=0;z<size;z++){
    let h = noise(x,z);
    for(let y=0;y<h;y++){
      let type = BLOCK.STONE;
      if(y > h-2) type = BLOCK.GRASS;
      else if(y > h-4) type = BLOCK.DIRT;
      world[`${x},${y},${z}`] = type;
    }
  }
}

// ===== MESH =====
const meshes = {};

function createBlock(x,y,z,type){
  const geo = new THREE.BoxGeometry(1,1,1);
  const mesh = new THREE.Mesh(geo, materials[type]);
  mesh.position.set(x,y,z);
  scene.add(mesh);
  meshes[`${x},${y},${z}`] = mesh;
}

// render visible blocks only
for(let key in world){
  let [x,y,z] = key.split(',').map(Number);
  let neighbors = [
    `${x+1},${y},${z}`,
    `${x-1},${y},${z}`,
    `${x},${y+1},${z}`,
    `${x},${y-1},${z}`,
    `${x},${y},${z+1}`,
    `${x},${y},${z-1}`
  ];
  let visible = neighbors.some(n => !world[n]);
  if(visible){
    createBlock(x,y,z,world[key]);
  }
}

// ===== PLAYER =====
camera.position.set(10,10,10);

let velocity = new THREE.Vector3();
let keys = {};

window.addEventListener('keydown', e => keys[e.key]=true);
window.addEventListener('keyup', e => keys[e.key]=false);

// TOUCH LOOK
let touchX=0, touchY=0;
window.addEventListener('touchmove', e=>{
  let t = e.touches[0];
  touchX = (t.clientX/window.innerWidth - 0.5)*2;
  touchY = (t.clientY/window.innerHeight - 0.5)*2;
});

// ===== RAYCAST =====
const raycaster = new THREE.Raycaster();

function interact(place=false){
  raycaster.setFromCamera({x:0,y:0}, camera);
  const intersects = raycaster.intersectObjects(Object.values(meshes));
  if(intersects.length > 0){
    const obj = intersects[0].object;
    const pos = obj.position;

    if(place){
      let nx = Math.round(pos.x + intersects[0].face.normal.x);
      let ny = Math.round(pos.y + intersects[0].face.normal.y);
      let nz = Math.round(pos.z + intersects[0].face.normal.z);

      if(!world[`${nx},${ny},${nz}`]){
        world[`${nx},${ny},${nz}`] = selectedBlock;
        createBlock(nx,ny,nz,selectedBlock);
      }
    } else {
      scene.remove(obj);
      delete meshes[`${pos.x},${pos.y},${pos.z}`];
      delete world[`${pos.x},${pos.y},${pos.z}`];
    }
  }
}

// tap = break, double tap = place
let lastTap = 0;
window.addEventListener('touchstart', ()=>{
  let now = Date.now();
  if(now - lastTap < 300){
    interact(true);
  } else {
    interact(false);
  }
  lastTap = now;
});

// ===== HOTBAR =====
let selectedBlock = 0;
const names = ["Grass","Dirt","Stone"];

window.addEventListener('wheel', e=>{
  selectedBlock = (selectedBlock + (e.deltaY>0?1:-1) + 3)%3;
  document.getElementById("block").innerText = names[selectedBlock];
});

// ===== LOOP =====
function animate(){
  requestAnimationFrame(animate);

  // movement
  let speed = 0.1;
  if(keys['w']) camera.position.z -= speed;
  if(keys['s']) camera.position.z += speed;
  if(keys['a']) camera.position.x -= speed;
  if(keys['d']) camera.position.x += speed;

  // look
  camera.rotation.y = -touchX;
  camera.rotation.x = -touchY;

  renderer.render(scene, camera);
}
animate();

</script>
</body>
</html>

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641KB

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1,789.0ms

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