forked from mrdoob/three.js
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathwebgl_lod.html
174 lines (116 loc) · 3.76 KB
/
webgl_lod.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
162
163
164
165
166
167
168
169
170
171
172
173
174
<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - level-of-details</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body {
background:#000;
color:#fff;
padding:0;
margin:0;
font-weight: bold;
overflow:hidden;
}
#info {
position: absolute;
top: 0px; width: 100%;
color: #ffffff;
padding: 5px;
font-family: Monospace;
font-size: 13px;
text-align: center;
z-index:100;
}
a { color:red }
</style>
</head>
<body>
<div id="info">
<a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> - level-of-details WebGL example
</div>
<script src="../build/three.js"></script>
<script src="js/controls/FlyControls.js"></script>
<script src="js/WebGL.js"></script>
<script src="js/libs/stats.min.js"></script>
<script>
if ( WEBGL.isWebGLAvailable() === false ) {
document.body.appendChild( WEBGL.getWebGLErrorMessage() );
}
var container;
var camera, scene, renderer;
var controls, clock = new THREE.Clock();
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 15000 );
camera.position.z = 1000;
controls = new THREE.FlyControls( camera );
controls.movementSpeed = 1000;
controls.rollSpeed = Math.PI / 10;
scene = new THREE.Scene();
scene.fog = new THREE.Fog( 0x000000, 1, 15000 );
scene.autoUpdate = false;
var light = new THREE.PointLight( 0xff2200 );
light.position.set( 0, 0, 0 );
scene.add( light );
var light = new THREE.DirectionalLight( 0xffffff );
light.position.set( 0, 0, 1 ).normalize();
scene.add( light );
var geometry = [
[ new THREE.IcosahedronBufferGeometry( 100, 4 ), 50 ],
[ new THREE.IcosahedronBufferGeometry( 100, 3 ), 300 ],
[ new THREE.IcosahedronBufferGeometry( 100, 2 ), 1000 ],
[ new THREE.IcosahedronBufferGeometry( 100, 1 ), 2000 ],
[ new THREE.IcosahedronBufferGeometry( 100, 0 ), 8000 ]
];
var material = new THREE.MeshLambertMaterial( { color: 0xffffff, wireframe: true } );
var i, j, mesh, lod;
for ( j = 0; j < 1000; j ++ ) {
lod = new THREE.LOD();
for ( i = 0; i < geometry.length; i ++ ) {
mesh = new THREE.Mesh( geometry[ i ][ 0 ], material );
mesh.scale.set( 1.5, 1.5, 1.5 );
mesh.updateMatrix();
mesh.matrixAutoUpdate = false;
lod.addLevel( mesh, geometry[ i ][ 1 ] );
}
lod.position.x = 10000 * ( 0.5 - Math.random() );
lod.position.y = 7500 * ( 0.5 - Math.random() );
lod.position.z = 10000 * ( 0.5 - Math.random() );
lod.updateMatrix();
lod.matrixAutoUpdate = false;
scene.add( lod );
}
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
//
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function animate() {
requestAnimationFrame( animate );
render();
}
function render() {
controls.update( clock.getDelta() );
scene.updateMatrixWorld();
scene.traverse( function ( object ) {
if ( object instanceof THREE.LOD ) {
object.update( camera );
}
} );
renderer.render( scene, camera );
}
</script>
</body>
</html>