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<title>three.js webgl - geometry - dynamic</title>
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - dynamic geometry<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/es-module-shims@1.3.6/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';
let camera, controls, scene, renderer, stats;
let mesh, geometry, material, clock;
const worldWidth = 128, worldDepth = 128;
init();
animate();
function init() {
camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 20000 );
camera.position.y = 200;
clock = new THREE.Clock();
scene = new THREE.Scene();
scene.background = new THREE.Color( 0xaaccff );
scene.fog = new THREE.FogExp2( 0xaaccff, 0.0007 );
geometry = new THREE.PlaneGeometry( 20000, 20000, worldWidth - 1, worldDepth - 1 );
geometry.rotateX( - Math.PI / 2 );
const position = geometry.attributes.position;
position.usage = THREE.DynamicDrawUsage;
for ( let i = 0; i < position.count; i ++ ) {
const y = 35 * Math.sin( i / 2 );
position.setY( i, y );
}
const texture = new THREE.TextureLoader().load( 'textures/water.jpg' );
texture.wrapS = texture.wrapT = THREE.RepeatWrapping;
texture.repeat.set( 5, 5 );
material = new THREE.MeshBasicMaterial( { color: 0x0044ff, map: texture } );
mesh = new THREE.Mesh( geometry, material );
scene.add( mesh );
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
controls = new FirstPersonControls( camera, renderer.domElement );
controls.movementSpeed = 500;
controls.lookSpeed = 0.1;
stats = new Stats();
document.body.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 animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
const delta = clock.getDelta();
const time = clock.getElapsedTime() * 10;
const position = geometry.attributes.position;
for ( let i = 0; i < position.count; i ++ ) {
const y = 35 * Math.sin( i / 5 + ( time + i ) / 7 );
position.setY( i, y );
}
position.needsUpdate = true;
controls.update( delta );
renderer.render( scene, camera );
}
</script>
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