forked from mrdoob/three.js
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathwebgl_buffergeometry_constructed_from_geometry.html
193 lines (139 loc) · 5.41 KB
/
webgl_buffergeometry_constructed_from_geometry.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
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - buffer geometry constructed from geometry</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">
<style>
a {
color: #08f;
}
</style>
</head>
<body>
<div id="info">
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - buffergeometry constructed from geometry<br/>
by <a target="_blank" href="http://callum.com">Callum Prentice</a>
</div>
<script type="module">
import * as THREE from '../build/three.module.js';
import Stats from './jsm/libs/stats.module.js';
import { TrackballControls } from './jsm/controls/TrackballControls.js';
var camera, scene, renderer, controls, stats;
init();
animate();
function init() {
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera( 45.0, window.innerWidth / window.innerHeight, 100, 1500.0 );
camera.position.z = 480.0;
scene.add( camera );
controls = new TrackballControls( camera, renderer.domElement );
controls.minDistance = 100.0;
controls.maxDistance = 800.0;
controls.dynamicDampingFactor = 0.1;
scene.add( new THREE.AmbientLight( 0xffffff, 0.2 ) );
var light = new THREE.PointLight( 0xffffff, 0.7 );
camera.add( light );
createScene();
stats = new Stats();
document.body.appendChild( stats.dom );
window.addEventListener( 'resize', onWindowResize, false );
}
function createGeometry() {
var heartShape = new THREE.Shape(); // From http://blog.burlock.org/html5/130-paths
var x = 0, y = 0;
heartShape.moveTo( x + 25, y + 25 );
heartShape.bezierCurveTo( x + 25, y + 25, x + 20, y, x, y );
heartShape.bezierCurveTo( x - 30, y, x - 30, y + 35, x - 30, y + 35 );
heartShape.bezierCurveTo( x - 30, y + 55, x - 10, y + 77, x + 25, y + 95 );
heartShape.bezierCurveTo( x + 60, y + 77, x + 80, y + 55, x + 80, y + 35 );
heartShape.bezierCurveTo( x + 80, y + 35, x + 80, y, x + 50, y );
heartShape.bezierCurveTo( x + 35, y, x + 25, y + 25, x + 25, y + 25 );
var extrudeSettings = {
depth: 16,
bevelEnabled: true,
bevelSegments: 1,
steps: 2,
bevelSize: 1,
bevelThickness: 1
};
var geometry = new THREE.ExtrudeGeometry( heartShape, extrudeSettings );
geometry.rotateX( Math.PI );
geometry.scale( 0.4, 0.4, 0.4 );
return geometry;
}
function createScene() {
var bufferGeometry = new THREE.BufferGeometry();
var radius = 125;
var count = 80;
var positions = [];
var normals = [];
var colors = [];
var vector = new THREE.Vector3();
var color = new THREE.Color( 0xffffff );
var heartGeometry = createGeometry();
var geometry = new THREE.Geometry();
for ( var i = 1, l = count; i <= l; i ++ ) {
var phi = Math.acos( - 1 + ( 2 * i ) / l );
var theta = Math.sqrt( l * Math.PI ) * phi;
vector.setFromSphericalCoords( radius, phi, theta );
geometry.copy( heartGeometry );
geometry.lookAt( vector );
geometry.translate( vector.x, vector.y, vector.z );
color.setHSL( ( i / l ), 1.0, 0.7 );
geometry.faces.forEach( function ( face ) {
positions.push( geometry.vertices[ face.a ].x );
positions.push( geometry.vertices[ face.a ].y );
positions.push( geometry.vertices[ face.a ].z );
positions.push( geometry.vertices[ face.b ].x );
positions.push( geometry.vertices[ face.b ].y );
positions.push( geometry.vertices[ face.b ].z );
positions.push( geometry.vertices[ face.c ].x );
positions.push( geometry.vertices[ face.c ].y );
positions.push( geometry.vertices[ face.c ].z );
normals.push( face.normal.x );
normals.push( face.normal.y );
normals.push( face.normal.z );
normals.push( face.normal.x );
normals.push( face.normal.y );
normals.push( face.normal.z );
normals.push( face.normal.x );
normals.push( face.normal.y );
normals.push( face.normal.z );
colors.push( color.r );
colors.push( color.g );
colors.push( color.b );
colors.push( color.r );
colors.push( color.g );
colors.push( color.b );
colors.push( color.r );
colors.push( color.g );
colors.push( color.b );
} );
}
bufferGeometry.setAttribute( 'position', new THREE.Float32BufferAttribute( positions, 3 ) );
bufferGeometry.setAttribute( 'normal', new THREE.Float32BufferAttribute( normals, 3 ) );
bufferGeometry.setAttribute( 'color', new THREE.Float32BufferAttribute( colors, 3 ) );
var material = new THREE.MeshPhongMaterial( { shininess: 80, vertexColors: true } );
var mesh = new THREE.Mesh( bufferGeometry, material );
scene.add( mesh );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function animate() {
requestAnimationFrame( animate );
controls.update();
stats.update();
renderer.render( scene, camera );
}
</script>
</body>
</html>