-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathindex.html
173 lines (153 loc) · 5.86 KB
/
index.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
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Colouro Mandelbrot</title>
<!-- Search Engine -->
<meta name="description" content="Mandelbrot and Julia set fractals visualizations made with WebGL and love">
<meta name="image" content="https://colouroapp.com/toys/mandelbrot/img/colouro-mandelbrot.png">
<!-- Schema.org for Google -->
<meta itemprop="name" content="Colouro Mandelbrot">
<meta itemprop="description" content="Mandelbrot and Julia set fractals visualizations made with WebGL and love">
<meta itemprop="image" content="https://colouroapp.com/toys/mandelbrot/img/colouro-mandelbrot.png">
<!-- Twitter -->
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="Colouro Mandelbrot">
<meta name="twitter:description" content="Mandelbrot and Julia set fractals visualizations made with WebGL and love">
<meta name="twitter:site" content="@PilsFuLab">
<meta name="twitter:creator" content="@PilsFuLab">
<meta name="twitter:image:src" content="https://colouroapp.com/toys/mandelbrot/img/colouro-mandelbrot-1024x512.png">
<!-- Open Graph general (Facebook, Pinterest & Google+) -->
<meta name="og:title" content="Colouro Mandelbrot">
<meta name="og:description" content="Mandelbrot and Julia set fractals visualizations made with WebGL and love">
<meta name="og:image" content="https://colouroapp.com/toys/mandelbrot/img/colouro-mandelbrot-1200x630.png">
<meta name="og:url" content="https://colouroapp.com/toys/mandelbrot">
<meta name="og:site_name" content="Colouro Mandelbrot">
<meta name="og:locale" content="en_US">
<meta name="og:type" content="website">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<link href="https://fonts.googleapis.com/css?family=Exo+2:400,400i" rel="stylesheet">
<link href="css/main.css" rel="stylesheet">
</head>
<body>
<canvas id="main-canvas"></canvas>
<div id="scheme">
<button id="clr-btn" onclick="document.getElementById('clr-box').classList.toggle('hidden');"></button>
<span id="clr-box" class="hidden">
<label for="clr-host"><a href="//colouroapp.com">Colouro</a> Host</label>
<input id="clr-host" type="text" placeholder="192.168.0.42:8080" onkeypress="return connectInputKeyPress(event);">
<button onclick="connectClicked();">Connect</button>
</span>
<span id="scheme-colors">
<input type="color" onchange="kit.context.scheme.setColorHex(0, this.value)">
<input type="color" onchange="kit.context.scheme.setColorHex(1, this.value)">
<input type="color" onchange="kit.context.scheme.setColorHex(2, this.value)">
<input type="color" onchange="kit.context.scheme.setColorHex(3, this.value)">
<input type="color" onchange="kit.context.scheme.setColorHex(4, this.value)">
</span>
</div>
<div id="mode-selector">
<select onchange="modeChanged(this.value);">
<option value="0" selected>Mandelbrot</option>
<option value="1">Julia 1</option>
<option value="2">Julia 2</option>
</select>
</div>
<button id="zen-btn" onclick="toggleZenMode();">Zen</button>
<script src="deps/twgl-full.min.js"></script>
<script src="deps/colouro-reskin.js"></script>
<script src="src/webglkit.js"></script>
<script type="x-shader/x-vertex" id="vs">
attribute vec4 position;
void main() {
gl_Position = position;
}
</script>
<script type="x-shader/x-fragment" id="fs">
precision highp float;
uniform vec2 resolution;
uniform vec2 zoomCenter;
uniform float phi;
uniform float zoomSize;
uniform int maxIterations;
uniform int mode;
uniform vec3 color0;
uniform vec3 color1;
uniform vec3 color2;
uniform vec3 color3;
uniform vec3 color4;
vec2 f(vec2 z, vec2 c) {
return mat2(z, -z.y, z.x) * z + c;
}
vec3 palette(float f) {
f = 5.0 * pow(f, .8);
vec3 a,b;
float r;
if (f < 1.0) {
r = f;
a = color0;
b = color1;
} else if (f < 2.0) {
r = f - 1.0;
a = color1;
b = color2;
} else if (f < 3.0) {
r = f - 2.0;
a = color2;
b = color3;
} else if (f < 4.0) {
r = f - 3.0;
a = color3;
b = color4;
} else {
r = f - 4.0;
a = color4;
b = color0;
}
return mix(a,b,r);
}
float fractLoop(vec2 c, vec2 z, float stopLenSq) {
int iterations;
for (int i = 0; i < 10000; i++) {
if (i > maxIterations) {
return -1.0;
}
iterations = i;
z = f(z, c);
if (dot(z,z) > stopLenSq) {
break;
}
}
return float(iterations) / float(maxIterations);
}
float fractMandelbrot(vec2 p) {
return fractLoop(p, vec2(0,0), 4.0);
}
float fractJulia1(vec2 p) {
// golden ratio
float phi = 1.6180339887498948482;
return fractLoop(vec2(phi - 2.0, phi - 1.0), p, 4.0);
}
float fractJulia2(vec2 p) {
return fractLoop(vec2(.285, .01), p, 4.0);
}
void main() {
vec2 uv = gl_FragCoord.xy / resolution;
float cs = cos(phi);
float sn = sin(phi);
mat2 rot = mat2(cs, -sn, sn, cs);
vec2 scale = vec2(zoomSize, zoomSize * resolution.y / resolution.x);
vec2 c = zoomCenter + rot * ((uv * 4.0 - vec2(2.0)) * (scale / 4.0));
float iterFactor
= (mode == 1)
? fractJulia1(c)
: (mode == 2)
? fractJulia2(c)
: fractMandelbrot(c)
;
gl_FragColor = (iterFactor < 0.0) ? vec4(vec3(0.0), 1.0) : vec4(palette(iterFactor), 1.0);
}
</script>
<script src="src/main.js"></script>
</body>
</html>