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webgl_geometry_minecraft.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - geometry - minecraft</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link type="text/css" rel="stylesheet" href="main.css">
<style>
body {
background-color: #bfd1e5;
color: #61443e;
}
a {
color: #a06851;
}
</style>
</head>
<body>
<div id="container"></div>
<div id="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - <a href="http://www.minecraft.net/" target="_blank" rel="noopener">minecraft</a> demo. featuring <a href="http://painterlypack.net/" target="_blank" rel="noopener">painterly pack</a><br />(left click: forward, right click: backward)</div>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>
<script type="importmap">
{
"imports": {
"three": "../build/three.module.js",
"three/addons/": "./jsm/"
}
}
</script>
<script type="module">
import * as THREE from 'three';
import Stats from 'three/addons/libs/stats.module.js';
import { FirstPersonControls } from 'three/addons/controls/FirstPersonControls.js';
import { ImprovedNoise } from 'three/addons/math/ImprovedNoise.js';
import * as BufferGeometryUtils from 'three/addons/utils/BufferGeometryUtils.js';
let container, stats;
let camera, controls, scene, renderer;
const worldWidth = 128, worldDepth = 128;
const worldHalfWidth = worldWidth / 2;
const worldHalfDepth = worldDepth / 2;
const data = generateHeight( worldWidth, worldDepth );
const clock = new THREE.Clock();
init();
animate();
function init() {
container = document.getElementById( 'container' );
camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 20000 );
camera.position.y = getY( worldHalfWidth, worldHalfDepth ) * 100 + 100;
scene = new THREE.Scene();
scene.background = new THREE.Color( 0xbfd1e5 );
// sides
const matrix = new THREE.Matrix4();
const pxGeometry = new THREE.PlaneGeometry( 100, 100 );
pxGeometry.attributes.uv.array[ 1 ] = 0.5;
pxGeometry.attributes.uv.array[ 3 ] = 0.5;
pxGeometry.rotateY( Math.PI / 2 );
pxGeometry.translate( 50, 0, 0 );
const nxGeometry = new THREE.PlaneGeometry( 100, 100 );
nxGeometry.attributes.uv.array[ 1 ] = 0.5;
nxGeometry.attributes.uv.array[ 3 ] = 0.5;
nxGeometry.rotateY( - Math.PI / 2 );
nxGeometry.translate( - 50, 0, 0 );
const pyGeometry = new THREE.PlaneGeometry( 100, 100 );
pyGeometry.attributes.uv.array[ 5 ] = 0.5;
pyGeometry.attributes.uv.array[ 7 ] = 0.5;
pyGeometry.rotateX( - Math.PI / 2 );
pyGeometry.translate( 0, 50, 0 );
const pzGeometry = new THREE.PlaneGeometry( 100, 100 );
pzGeometry.attributes.uv.array[ 1 ] = 0.5;
pzGeometry.attributes.uv.array[ 3 ] = 0.5;
pzGeometry.translate( 0, 0, 50 );
const nzGeometry = new THREE.PlaneGeometry( 100, 100 );
nzGeometry.attributes.uv.array[ 1 ] = 0.5;
nzGeometry.attributes.uv.array[ 3 ] = 0.5;
nzGeometry.rotateY( Math.PI );
nzGeometry.translate( 0, 0, - 50 );
//
const geometries = [];
for ( let z = 0; z < worldDepth; z ++ ) {
for ( let x = 0; x < worldWidth; x ++ ) {
const h = getY( x, z );
matrix.makeTranslation(
x * 100 - worldHalfWidth * 100,
h * 100,
z * 100 - worldHalfDepth * 100
);
const px = getY( x + 1, z );
const nx = getY( x - 1, z );
const pz = getY( x, z + 1 );
const nz = getY( x, z - 1 );
geometries.push( pyGeometry.clone().applyMatrix4( matrix ) );
if ( ( px !== h && px !== h + 1 ) || x === 0 ) {
geometries.push( pxGeometry.clone().applyMatrix4( matrix ) );
}
if ( ( nx !== h && nx !== h + 1 ) || x === worldWidth - 1 ) {
geometries.push( nxGeometry.clone().applyMatrix4( matrix ) );
}
if ( ( pz !== h && pz !== h + 1 ) || z === worldDepth - 1 ) {
geometries.push( pzGeometry.clone().applyMatrix4( matrix ) );
}
if ( ( nz !== h && nz !== h + 1 ) || z === 0 ) {
geometries.push( nzGeometry.clone().applyMatrix4( matrix ) );
}
}
}
const geometry = BufferGeometryUtils.mergeBufferGeometries( geometries );
geometry.computeBoundingSphere();
const texture = new THREE.TextureLoader().load( 'textures/minecraft/atlas.png' );
texture.magFilter = THREE.NearestFilter;
const mesh = new THREE.Mesh( geometry, new THREE.MeshLambertMaterial( { map: texture, side: THREE.DoubleSide } ) );
scene.add( mesh );
const ambientLight = new THREE.AmbientLight( 0xcccccc );
scene.add( ambientLight );
const directionalLight = new THREE.DirectionalLight( 0xffffff, 2 );
directionalLight.position.set( 1, 1, 0.5 ).normalize();
scene.add( directionalLight );
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
controls = new FirstPersonControls( camera, renderer.domElement );
controls.movementSpeed = 1000;
controls.lookSpeed = 0.125;
controls.lookVertical = true;
stats = new Stats();
container.appendChild( stats.dom );
//
window.addEventListener( 'resize', onWindowResize );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
controls.handleResize();
}
function generateHeight( width, height ) {
const data = [], perlin = new ImprovedNoise(),
size = width * height, z = Math.random() * 100;
let quality = 2;
for ( let j = 0; j < 4; j ++ ) {
if ( j === 0 ) for ( let i = 0; i < size; i ++ ) data[ i ] = 0;
for ( let i = 0; i < size; i ++ ) {
const x = i % width, y = ( i / width ) | 0;
data[ i ] += perlin.noise( x / quality, y / quality, z ) * quality;
}
quality *= 4;
}
return data;
}
function getY( x, z ) {
return ( data[ x + z * worldWidth ] * 0.15 ) | 0;
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
controls.update( clock.getDelta() );
renderer.render( scene, camera );
}
</script>
</body>
</html>