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webgl_decals.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - decal splatter</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>
<div id="container"></div>
<div id="info">
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - decal splatter<br/>
click to shoot
</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 { GUI } from 'three/addons/libs/lil-gui.module.min.js';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
import { DecalGeometry } from 'three/addons/geometries/DecalGeometry.js';
const container = document.getElementById( 'container' );
let renderer, scene, camera, stats;
let mesh;
let raycaster;
let line;
const intersection = {
intersects: false,
point: new THREE.Vector3(),
normal: new THREE.Vector3()
};
const mouse = new THREE.Vector2();
const intersects = [];
const textureLoader = new THREE.TextureLoader();
const decalDiffuse = textureLoader.load( 'textures/decal/decal-diffuse.png' );
const decalNormal = textureLoader.load( 'textures/decal/decal-normal.jpg' );
const decalMaterial = new THREE.MeshPhongMaterial( {
specular: 0x444444,
map: decalDiffuse,
normalMap: decalNormal,
normalScale: new THREE.Vector2( 1, 1 ),
shininess: 30,
transparent: true,
depthTest: true,
depthWrite: false,
polygonOffset: true,
polygonOffsetFactor: - 4,
wireframe: false
} );
const decals = [];
let mouseHelper;
const position = new THREE.Vector3();
const orientation = new THREE.Euler();
const size = new THREE.Vector3( 10, 10, 10 );
const params = {
minScale: 10,
maxScale: 20,
rotate: true,
clear: function () {
removeDecals();
}
};
init();
animate();
function init() {
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
stats = new Stats();
container.appendChild( stats.dom );
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.z = 120;
const controls = new OrbitControls( camera, renderer.domElement );
controls.minDistance = 50;
controls.maxDistance = 200;
scene.add( new THREE.AmbientLight( 0x443333 ) );
const dirLight1 = new THREE.DirectionalLight( 0xffddcc, 1 );
dirLight1.position.set( 1, 0.75, 0.5 );
scene.add( dirLight1 );
const dirLight2 = new THREE.DirectionalLight( 0xccccff, 1 );
dirLight2.position.set( - 1, 0.75, - 0.5 );
scene.add( dirLight2 );
const geometry = new THREE.BufferGeometry();
geometry.setFromPoints( [ new THREE.Vector3(), new THREE.Vector3() ] );
line = new THREE.Line( geometry, new THREE.LineBasicMaterial() );
scene.add( line );
loadLeePerrySmith();
raycaster = new THREE.Raycaster();
mouseHelper = new THREE.Mesh( new THREE.BoxGeometry( 1, 1, 10 ), new THREE.MeshNormalMaterial() );
mouseHelper.visible = false;
scene.add( mouseHelper );
window.addEventListener( 'resize', onWindowResize );
let moved = false;
controls.addEventListener( 'change', function () {
moved = true;
} );
window.addEventListener( 'pointerdown', function () {
moved = false;
} );
window.addEventListener( 'pointerup', function ( event ) {
if ( moved === false ) {
checkIntersection( event.clientX, event.clientY );
if ( intersection.intersects ) shoot();
}
} );
window.addEventListener( 'pointermove', onPointerMove );
function onPointerMove( event ) {
if ( event.isPrimary ) {
checkIntersection( event.clientX, event.clientY );
}
}
function checkIntersection( x, y ) {
if ( mesh === undefined ) return;
mouse.x = ( x / window.innerWidth ) * 2 - 1;
mouse.y = - ( y / window.innerHeight ) * 2 + 1;
raycaster.setFromCamera( mouse, camera );
raycaster.intersectObject( mesh, false, intersects );
if ( intersects.length > 0 ) {
const p = intersects[ 0 ].point;
mouseHelper.position.copy( p );
intersection.point.copy( p );
const n = intersects[ 0 ].face.normal.clone();
n.transformDirection( mesh.matrixWorld );
n.multiplyScalar( 10 );
n.add( intersects[ 0 ].point );
intersection.normal.copy( intersects[ 0 ].face.normal );
mouseHelper.lookAt( n );
const positions = line.geometry.attributes.position;
positions.setXYZ( 0, p.x, p.y, p.z );
positions.setXYZ( 1, n.x, n.y, n.z );
positions.needsUpdate = true;
intersection.intersects = true;
intersects.length = 0;
} else {
intersection.intersects = false;
}
}
const gui = new GUI();
gui.add( params, 'minScale', 1, 30 );
gui.add( params, 'maxScale', 1, 30 );
gui.add( params, 'rotate' );
gui.add( params, 'clear' );
gui.open();
}
function loadLeePerrySmith() {
const loader = new GLTFLoader();
loader.load( 'models/gltf/LeePerrySmith/LeePerrySmith.glb', function ( gltf ) {
mesh = gltf.scene.children[ 0 ];
mesh.material = new THREE.MeshPhongMaterial( {
specular: 0x111111,
map: textureLoader.load( 'models/gltf/LeePerrySmith/Map-COL.jpg' ),
specularMap: textureLoader.load( 'models/gltf/LeePerrySmith/Map-SPEC.jpg' ),
normalMap: textureLoader.load( 'models/gltf/LeePerrySmith/Infinite-Level_02_Tangent_SmoothUV.jpg' ),
shininess: 25
} );
scene.add( mesh );
mesh.scale.set( 10, 10, 10 );
} );
}
function shoot() {
position.copy( intersection.point );
orientation.copy( mouseHelper.rotation );
if ( params.rotate ) orientation.z = Math.random() * 2 * Math.PI;
const scale = params.minScale + Math.random() * ( params.maxScale - params.minScale );
size.set( scale, scale, scale );
const material = decalMaterial.clone();
material.color.setHex( Math.random() * 0xffffff );
const m = new THREE.Mesh( new DecalGeometry( mesh, position, orientation, size ), material );
decals.push( m );
scene.add( m );
}
function removeDecals() {
decals.forEach( function ( d ) {
scene.remove( d );
} );
decals.length = 0;
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function animate() {
requestAnimationFrame( animate );
renderer.render( scene, camera );
stats.update();
}
</script>
</body>
</html>