forked from mrdoob/three.js
-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathwebgl_points_billboards.html
161 lines (102 loc) · 3.69 KB
/
webgl_points_billboards.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - 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> - webgl particle billboards example
</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';
let camera, scene, renderer, stats, material;
let mouseX = 0, mouseY = 0;
let windowHalfX = window.innerWidth / 2;
let windowHalfY = window.innerHeight / 2;
init();
animate();
function init() {
camera = new THREE.PerspectiveCamera( 55, window.innerWidth / window.innerHeight, 2, 2000 );
camera.position.z = 1000;
scene = new THREE.Scene();
scene.fog = new THREE.FogExp2( 0x000000, 0.001 );
const geometry = new THREE.BufferGeometry();
const vertices = [];
const sprite = new THREE.TextureLoader().load( 'textures/sprites/disc.png' );
for ( let i = 0; i < 10000; i ++ ) {
const x = 2000 * Math.random() - 1000;
const y = 2000 * Math.random() - 1000;
const z = 2000 * Math.random() - 1000;
vertices.push( x, y, z );
}
geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
material = new THREE.PointsMaterial( { size: 35, sizeAttenuation: true, map: sprite, alphaTest: 0.5, transparent: true } );
material.color.setHSL( 1.0, 0.3, 0.7 );
const particles = new THREE.Points( geometry, material );
scene.add( particles );
//
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
//
stats = new Stats();
document.body.appendChild( stats.dom );
//
const gui = new GUI();
gui.add( material, 'sizeAttenuation' ).onChange( function () {
material.needsUpdate = true;
} );
gui.open();
//
document.body.style.touchAction = 'none';
document.body.addEventListener( 'pointermove', onPointerMove );
//
window.addEventListener( 'resize', onWindowResize );
}
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
windowHalfY = window.innerHeight / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function onPointerMove( event ) {
if ( event.isPrimary === false ) return;
mouseX = event.clientX - windowHalfX;
mouseY = event.clientY - windowHalfY;
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
const time = Date.now() * 0.00005;
camera.position.x += ( mouseX - camera.position.x ) * 0.05;
camera.position.y += ( - mouseY - camera.position.y ) * 0.05;
camera.lookAt( scene.position );
const h = ( 360 * ( 1.0 + time ) % 360 ) / 360;
material.color.setHSL( h, 0.5, 0.5 );
renderer.render( scene, camera );
}
</script>
</body>
</html>