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.
298 lines
6.7 KiB
298 lines
6.7 KiB
3 years ago
|
<!DOCTYPE html>
|
||
|
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>three.js webgl - custom attributes [particles][billboards]</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="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - custom attributes example - particles - billboards</div>
|
||
|
|
<div id="container"></div>
|
||
|
|
|
||
|
|
<script type="x-shader/x-vertex" id="vertexshader">
|
||
|
|
|
||
|
|
attribute float size;
|
||
|
|
attribute vec3 ca;
|
||
|
|
|
||
|
|
varying vec3 vColor;
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
|
||
|
|
vColor = ca;
|
||
|
|
|
||
|
|
vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );
|
||
|
|
|
||
|
|
gl_PointSize = size * ( 300.0 / -mvPosition.z );
|
||
|
|
|
||
|
|
gl_Position = projectionMatrix * mvPosition;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<script type="x-shader/x-fragment" id="fragmentshader">
|
||
|
|
|
||
|
|
uniform vec3 color;
|
||
|
|
uniform sampler2D pointTexture;
|
||
|
|
|
||
|
|
varying vec3 vColor;
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
|
||
|
|
vec4 color = vec4( color * vColor, 1.0 ) * texture2D( pointTexture, gl_PointCoord );
|
||
|
|
|
||
|
|
gl_FragColor = color;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<!-- 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 * as BufferGeometryUtils from 'three/addons/utils/BufferGeometryUtils.js';
|
||
|
|
|
||
|
|
let renderer, scene, camera, stats;
|
||
|
|
let sphere, length1;
|
||
|
|
|
||
|
|
const WIDTH = window.innerWidth;
|
||
|
|
const HEIGHT = window.innerHeight;
|
||
|
|
|
||
|
|
init();
|
||
|
|
animate();
|
||
|
|
|
||
|
|
function init() {
|
||
|
|
|
||
|
|
camera = new THREE.PerspectiveCamera( 45, WIDTH / HEIGHT, 1, 10000 );
|
||
|
|
camera.position.z = 300;
|
||
|
|
|
||
|
|
scene = new THREE.Scene();
|
||
|
|
|
||
|
|
const radius = 100, segments = 68, rings = 38;
|
||
|
|
|
||
|
|
let sphereGeometry = new THREE.SphereGeometry( radius, segments, rings );
|
||
|
|
let boxGeometry = new THREE.BoxGeometry( 0.8 * radius, 0.8 * radius, 0.8 * radius, 10, 10, 10 );
|
||
|
|
|
||
|
|
// if normal and uv attributes are not removed, mergeVertices() can't consolidate identical vertices with different normal/uv data
|
||
|
|
|
||
|
|
sphereGeometry.deleteAttribute( 'normal' );
|
||
|
|
sphereGeometry.deleteAttribute( 'uv' );
|
||
|
|
|
||
|
|
boxGeometry.deleteAttribute( 'normal' );
|
||
|
|
boxGeometry.deleteAttribute( 'uv' );
|
||
|
|
|
||
|
|
sphereGeometry = BufferGeometryUtils.mergeVertices( sphereGeometry );
|
||
|
|
boxGeometry = BufferGeometryUtils.mergeVertices( boxGeometry );
|
||
|
|
|
||
|
|
const combinedGeometry = BufferGeometryUtils.mergeBufferGeometries( [ sphereGeometry, boxGeometry ] );
|
||
|
|
const positionAttribute = combinedGeometry.getAttribute( 'position' );
|
||
|
|
|
||
|
|
const colors = [];
|
||
|
|
const sizes = [];
|
||
|
|
|
||
|
|
const color = new THREE.Color();
|
||
|
|
const vertex = new THREE.Vector3();
|
||
|
|
|
||
|
|
length1 = sphereGeometry.getAttribute( 'position' ).count;
|
||
|
|
|
||
|
|
for ( let i = 0, l = positionAttribute.count; i < l; i ++ ) {
|
||
|
|
|
||
|
|
vertex.fromBufferAttribute( positionAttribute, i );
|
||
|
|
|
||
|
|
if ( i < length1 ) {
|
||
|
|
|
||
|
|
color.setHSL( 0.01 + 0.1 * ( i / length1 ), 0.99, ( vertex.y + radius ) / ( 4 * radius ) );
|
||
|
|
|
||
|
|
} else {
|
||
|
|
|
||
|
|
color.setHSL( 0.6, 0.75, 0.25 + vertex.y / ( 2 * radius ) );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
color.toArray( colors, i * 3 );
|
||
|
|
|
||
|
|
sizes[ i ] = i < length1 ? 10 : 40;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
const geometry = new THREE.BufferGeometry();
|
||
|
|
geometry.setAttribute( 'position', positionAttribute );
|
||
|
|
geometry.setAttribute( 'size', new THREE.Float32BufferAttribute( sizes, 1 ) );
|
||
|
|
geometry.setAttribute( 'ca', new THREE.Float32BufferAttribute( colors, 3 ) );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
const texture = new THREE.TextureLoader().load( 'textures/sprites/disc.png' );
|
||
|
|
texture.wrapS = THREE.RepeatWrapping;
|
||
|
|
texture.wrapT = THREE.RepeatWrapping;
|
||
|
|
|
||
|
|
const material = new THREE.ShaderMaterial( {
|
||
|
|
|
||
|
|
uniforms: {
|
||
|
|
color: { value: new THREE.Color( 0xffffff ) },
|
||
|
|
pointTexture: { value: texture }
|
||
|
|
},
|
||
|
|
vertexShader: document.getElementById( 'vertexshader' ).textContent,
|
||
|
|
fragmentShader: document.getElementById( 'fragmentshader' ).textContent,
|
||
|
|
transparent: true
|
||
|
|
|
||
|
|
} );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
sphere = new THREE.Points( geometry, material );
|
||
|
|
scene.add( sphere );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
renderer = new THREE.WebGLRenderer();
|
||
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
||
|
|
renderer.setSize( WIDTH, HEIGHT );
|
||
|
|
|
||
|
|
const container = document.getElementById( 'container' );
|
||
|
|
container.appendChild( renderer.domElement );
|
||
|
|
|
||
|
|
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 );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function sortPoints() {
|
||
|
|
|
||
|
|
const vector = new THREE.Vector3();
|
||
|
|
|
||
|
|
// Model View Projection matrix
|
||
|
|
|
||
|
|
const matrix = new THREE.Matrix4();
|
||
|
|
matrix.multiplyMatrices( camera.projectionMatrix, camera.matrixWorldInverse );
|
||
|
|
matrix.multiply( sphere.matrixWorld );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
const geometry = sphere.geometry;
|
||
|
|
|
||
|
|
let index = geometry.getIndex();
|
||
|
|
const positions = geometry.getAttribute( 'position' ).array;
|
||
|
|
const length = positions.length / 3;
|
||
|
|
|
||
|
|
if ( index === null ) {
|
||
|
|
|
||
|
|
const array = new Uint16Array( length );
|
||
|
|
|
||
|
|
for ( let i = 0; i < length; i ++ ) {
|
||
|
|
|
||
|
|
array[ i ] = i;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
index = new THREE.BufferAttribute( array, 1 );
|
||
|
|
|
||
|
|
geometry.setIndex( index );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
const sortArray = [];
|
||
|
|
|
||
|
|
for ( let i = 0; i < length; i ++ ) {
|
||
|
|
|
||
|
|
vector.fromArray( positions, i * 3 );
|
||
|
|
vector.applyMatrix4( matrix );
|
||
|
|
|
||
|
|
sortArray.push( [ vector.z, i ] );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function numericalSort( a, b ) {
|
||
|
|
|
||
|
|
return b[ 0 ] - a[ 0 ];
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
sortArray.sort( numericalSort );
|
||
|
|
|
||
|
|
const indices = index.array;
|
||
|
|
|
||
|
|
for ( let i = 0; i < length; i ++ ) {
|
||
|
|
|
||
|
|
indices[ i ] = sortArray[ i ][ 1 ];
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
geometry.index.needsUpdate = true;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function animate() {
|
||
|
|
|
||
|
|
requestAnimationFrame( animate );
|
||
|
|
|
||
|
|
render();
|
||
|
|
stats.update();
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function render() {
|
||
|
|
|
||
|
|
const time = Date.now() * 0.005;
|
||
|
|
|
||
|
|
sphere.rotation.y = 0.02 * time;
|
||
|
|
sphere.rotation.z = 0.02 * time;
|
||
|
|
|
||
|
|
const geometry = sphere.geometry;
|
||
|
|
const attributes = geometry.attributes;
|
||
|
|
|
||
|
|
for ( let i = 0; i < attributes.size.array.length; i ++ ) {
|
||
|
|
|
||
|
|
if ( i < length1 ) {
|
||
|
|
|
||
|
|
attributes.size.array[ i ] = 16 + 12 * Math.sin( 0.1 * i + time );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
attributes.size.needsUpdate = true;
|
||
|
|
|
||
|
|
sortPoints();
|
||
|
|
|
||
|
|
renderer.render( scene, camera );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
</script>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
|
||
|
|
</html>
|