forked from mrdoob/three.js
-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathwebgl_materials_blending_custom.html
257 lines (178 loc) · 6.81 KB
/
webgl_materials_blending_custom.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
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - materials - custom blending</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>
<!-- 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 { GUI } from 'three/addons/libs/lil-gui.module.min.js';
let camera, scene, renderer;
let mapBg;
const materials = [];
const params = {
blendEquation: THREE.AddEquation
};
const equations = { Add: THREE.AddEquation, Subtract: THREE.SubtractEquation, ReverseSubtract: THREE.ReverseSubtractEquation, Min: THREE.MinEquation, Max: THREE.MaxEquation };
init();
animate();
function init() {
// CAMERA
camera = new THREE.PerspectiveCamera( 80, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.z = 700;
// SCENE
scene = new THREE.Scene();
// BACKGROUND
const canvas = document.createElement( 'canvas' );
const ctx = canvas.getContext( '2d' );
canvas.width = canvas.height = 128;
ctx.fillStyle = '#ddd';
ctx.fillRect( 0, 0, 128, 128 );
ctx.fillStyle = '#555';
ctx.fillRect( 0, 0, 64, 64 );
ctx.fillStyle = '#999';
ctx.fillRect( 32, 32, 32, 32 );
ctx.fillStyle = '#555';
ctx.fillRect( 64, 64, 64, 64 );
ctx.fillStyle = '#777';
ctx.fillRect( 96, 96, 32, 32 );
mapBg = new THREE.CanvasTexture( canvas );
mapBg.wrapS = mapBg.wrapT = THREE.RepeatWrapping;
mapBg.repeat.set( 64, 32 );
scene.background = mapBg;
// FOREGROUND OBJECTS
const src = [
{ name: 'Zero', constant: THREE.ZeroFactor },
{ name: 'One', constant: THREE.OneFactor },
{ name: 'SrcColor', constant: THREE.SrcColorFactor },
{ name: 'OneMinusSrcColor', constant: THREE.OneMinusSrcColorFactor },
{ name: 'SrcAlpha', constant: THREE.SrcAlphaFactor },
{ name: 'OneMinusSrcAlpha', constant: THREE.OneMinusSrcAlphaFactor },
{ name: 'DstAlpha', constant: THREE.DstAlphaFactor },
{ name: 'OneMinusDstAlpha', constant: THREE.OneMinusDstAlphaFactor },
{ name: 'DstColor', constant: THREE.DstColorFactor },
{ name: 'OneMinusDstColor', constant: THREE.OneMinusDstColorFactor },
{ name: 'SrcAlphaSaturate', constant: THREE.SrcAlphaSaturateFactor }
];
const dst = [
{ name: 'Zero', constant: THREE.ZeroFactor },
{ name: 'One', constant: THREE.OneFactor },
{ name: 'SrcColor', constant: THREE.SrcColorFactor },
{ name: 'OneMinusSrcColor', constant: THREE.OneMinusSrcColorFactor },
{ name: 'SrcAlpha', constant: THREE.SrcAlphaFactor },
{ name: 'OneMinusSrcAlpha', constant: THREE.OneMinusSrcAlphaFactor },
{ name: 'DstAlpha', constant: THREE.DstAlphaFactor },
{ name: 'OneMinusDstAlpha', constant: THREE.OneMinusDstAlphaFactor },
{ name: 'DstColor', constant: THREE.DstColorFactor },
{ name: 'OneMinusDstColor', constant: THREE.OneMinusDstColorFactor }
];
const geo1 = new THREE.PlaneGeometry( 100, 100 );
const geo2 = new THREE.PlaneGeometry( 100, 25 );
const texture = new THREE.TextureLoader().load( 'textures/lensflare/lensflare0_alpha.png' );
for ( let i = 0; i < dst.length; i ++ ) {
const blendDst = dst[ i ];
for ( let j = 0; j < src.length; j ++ ) {
const blendSrc = src[ j ];
const material = new THREE.MeshBasicMaterial( { map: texture } );
material.transparent = true;
material.blending = THREE.CustomBlending;
material.blendSrc = blendSrc.constant;
material.blendDst = blendDst.constant;
material.blendEquation = THREE.AddEquation;
const x = ( j - src.length / 2 ) * 110;
const z = 0;
const y = ( i - dst.length / 2 ) * 110 + 50;
const mesh = new THREE.Mesh( geo1, material );
mesh.position.set( x, - y, z );
mesh.matrixAutoUpdate = false;
mesh.updateMatrix();
scene.add( mesh );
materials.push( material );
}
}
for ( let j = 0; j < src.length; j ++ ) {
const blendSrc = src[ j ];
const x = ( j - src.length / 2 ) * 110;
const z = 0;
const y = ( 0 - dst.length / 2 ) * 110 + 50;
const mesh = new THREE.Mesh( geo2, generateLabelMaterial( blendSrc.name, 'rgba( 0, 150, 0, 1 )' ) );
mesh.position.set( x, - ( y - 70 ), z );
mesh.matrixAutoUpdate = false;
mesh.updateMatrix();
scene.add( mesh );
}
for ( let i = 0; i < dst.length; i ++ ) {
const blendDst = dst[ i ];
const x = ( 0 - src.length / 2 ) * 110 - 125;
const z = 0;
const y = ( i - dst.length / 2 ) * 110 + 165;
const mesh = new THREE.Mesh( geo2, generateLabelMaterial( blendDst.name, 'rgba( 150, 0, 0, 1 )' ) );
mesh.position.set( x, - ( y - 120 ), z );
mesh.matrixAutoUpdate = false;
mesh.updateMatrix();
scene.add( mesh );
}
// RENDERER
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
// EVENTS
window.addEventListener( 'resize', onWindowResize );
// GUI
//
const gui = new GUI( { width: 300 } );
gui.add( params, 'blendEquation', equations ).onChange( updateBlendEquation );
gui.open();
}
//
function onWindowResize() {
renderer.setSize( window.innerWidth, window.innerHeight );
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
}
//
function generateLabelMaterial( text, bg ) {
const canvas = document.createElement( 'canvas' );
const ctx = canvas.getContext( '2d' );
canvas.width = 128;
canvas.height = 32;
ctx.fillStyle = bg;
ctx.fillRect( 0, 0, 128, 32 );
ctx.fillStyle = 'white';
ctx.font = 'bold 11pt arial';
ctx.fillText( text, 8, 22 );
const map = new THREE.CanvasTexture( canvas );
const material = new THREE.MeshBasicMaterial( { map: map, transparent: true } );
return material;
}
function updateBlendEquation( value ) {
for ( const material of materials ) {
material.blendEquation = value;
}
}
function animate() {
requestAnimationFrame( animate );
const time = Date.now() * 0.00025;
const ox = ( time * - 0.01 * mapBg.repeat.x ) % 1;
const oy = ( time * - 0.01 * mapBg.repeat.y ) % 1;
mapBg.offset.set( ox, oy );
renderer.render( scene, camera );
}
</script>
</body>
</html>