You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
170 lines
3.9 KiB
170 lines
3.9 KiB
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<title>three.js webgl - instancing - raycast</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">
|
|
</head>
|
|
<body>
|
|
<!-- 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 { GUI } from 'three/addons/libs/lil-gui.module.min.js';
|
|
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
|
|
|
|
let camera, scene, renderer, controls, stats;
|
|
|
|
let mesh;
|
|
const amount = parseInt( window.location.search.slice( 1 ) ) || 10;
|
|
const count = Math.pow( amount, 3 );
|
|
|
|
const raycaster = new THREE.Raycaster();
|
|
const mouse = new THREE.Vector2( 1, 1 );
|
|
|
|
const color = new THREE.Color();
|
|
const white = new THREE.Color().setHex( 0xffffff );
|
|
|
|
init();
|
|
animate();
|
|
|
|
function init() {
|
|
|
|
camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.1, 100 );
|
|
camera.position.set( amount, amount, amount );
|
|
camera.lookAt( 0, 0, 0 );
|
|
|
|
scene = new THREE.Scene();
|
|
|
|
const light = new THREE.HemisphereLight( 0xffffff, 0x888888 );
|
|
light.position.set( 0, 1, 0 );
|
|
scene.add( light );
|
|
|
|
const geometry = new THREE.IcosahedronGeometry( 0.5, 3 );
|
|
const material = new THREE.MeshPhongMaterial( { color: 0xffffff } );
|
|
|
|
mesh = new THREE.InstancedMesh( geometry, material, count );
|
|
|
|
let i = 0;
|
|
const offset = ( amount - 1 ) / 2;
|
|
|
|
const matrix = new THREE.Matrix4();
|
|
|
|
for ( let x = 0; x < amount; x ++ ) {
|
|
|
|
for ( let y = 0; y < amount; y ++ ) {
|
|
|
|
for ( let z = 0; z < amount; z ++ ) {
|
|
|
|
matrix.setPosition( offset - x, offset - y, offset - z );
|
|
|
|
mesh.setMatrixAt( i, matrix );
|
|
mesh.setColorAt( i, color );
|
|
|
|
i ++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
scene.add( mesh );
|
|
|
|
//
|
|
|
|
const gui = new GUI();
|
|
gui.add( mesh, 'count', 0, count );
|
|
|
|
renderer = new THREE.WebGLRenderer( { antialias: true } );
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
document.body.appendChild( renderer.domElement );
|
|
|
|
controls = new OrbitControls( camera, renderer.domElement );
|
|
controls.enableDamping = true;
|
|
controls.enableZoom = false;
|
|
controls.enablePan = false;
|
|
|
|
stats = new Stats();
|
|
document.body.appendChild( stats.dom );
|
|
|
|
window.addEventListener( 'resize', onWindowResize );
|
|
document.addEventListener( 'mousemove', onMouseMove );
|
|
|
|
}
|
|
|
|
function onWindowResize() {
|
|
|
|
camera.aspect = window.innerWidth / window.innerHeight;
|
|
camera.updateProjectionMatrix();
|
|
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
|
|
}
|
|
|
|
function onMouseMove( event ) {
|
|
|
|
event.preventDefault();
|
|
|
|
mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
|
|
mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
|
|
|
|
}
|
|
|
|
function animate() {
|
|
|
|
requestAnimationFrame( animate );
|
|
|
|
controls.update();
|
|
|
|
raycaster.setFromCamera( mouse, camera );
|
|
|
|
const intersection = raycaster.intersectObject( mesh );
|
|
|
|
if ( intersection.length > 0 ) {
|
|
|
|
const instanceId = intersection[ 0 ].instanceId;
|
|
|
|
mesh.getColorAt( instanceId, color );
|
|
|
|
if ( color.equals( white ) ) {
|
|
|
|
mesh.setColorAt( instanceId, color.setHex( Math.random() * 0xffffff ) );
|
|
|
|
mesh.instanceColor.needsUpdate = true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
render();
|
|
|
|
stats.update();
|
|
|
|
}
|
|
|
|
function render() {
|
|
|
|
renderer.render( scene, camera );
|
|
|
|
}
|
|
|
|
</script>
|
|
</body>
|
|
</html>
|
|
|