-
Notifications
You must be signed in to change notification settings - Fork 0
/
love.html
170 lines (159 loc) · 5.28 KB
/
love.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
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>💗</title>
<style>
canvas {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
background-color: rgba(0, 0, 0, 0.2);
}
</style>
</head>
<body>
<audio id="music" src="./Love Story-ALisa.mp3" loop="loop" controls="controls" autoplay="autoplay"></audio>
<canvas id="heart" width="1920" height="947"></canvas>
<script>
window.requestAnimationFrame =
window.__requestAnimationFrame ||
window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
(function () {
return function (callback, element) {
var lastTime = element.__lastTime;
if (lastTime === undefined) {
lastTime = 0;
}
var currTime = Date.now();
var timeToCall = Math.max(1, 33 - (currTime - lastTime));
window.setTimeout(callback, timeToCall);
element.__lastTime = currTime + timeToCall;
};
})();
window.isDevice = /android|webos|iphone|ipad|ipod|blackberry|iemobile|opera mini/i.test((navigator.userAgent || navigator.vendor || window.opera).toLowerCase());
var loaded = false;
var init = function () {
if (loaded) return;
loaded = true;
var mobile = window.isDevice;
var koef = mobile ? 0.5 : 1;
var canvas = document.getElementById('heart');
var ctx = canvas.getContext('2d');
var width = (canvas.width = koef * innerWidth);
var height = (canvas.height = koef * innerHeight);
var rand = Math.random;
ctx.fillStyle = 'rgba(0,0,0,1)';
ctx.fillRect(0, 0, width, height);
var heartPosition = function (rad) {
//return [Math.sin(rad), Math.cos(rad)];
return [Math.pow(Math.sin(rad), 3), -(15 * Math.cos(rad) - 5 * Math.cos(2 * rad) - 2 * Math.cos(3 * rad) - Math.cos(4 * rad))];
};
var scaleAndTranslate = function (pos, sx, sy, dx, dy) {
return [dx + pos[0] * sx, dy + pos[1] * sy];
};
window.addEventListener('resize', function () {
width = canvas.width = koef * innerWidth;
height = canvas.height = koef * innerHeight;
ctx.fillStyle = 'rgba(0,0,0,1)';
ctx.fillRect(0, 0, width, height);
});
var traceCount = mobile ? 20 : 50;
var pointsOrigin = [];
var i;
var dr = mobile ? 0.3 : 0.1;
for (i = 0; i < Math.PI * 2; i += dr) pointsOrigin.push(scaleAndTranslate(heartPosition(i), 210, 13, 0, 0));
for (i = 0; i < Math.PI * 2; i += dr) pointsOrigin.push(scaleAndTranslate(heartPosition(i), 150, 9, 0, 0));
for (i = 0; i < Math.PI * 2; i += dr) pointsOrigin.push(scaleAndTranslate(heartPosition(i), 90, 5, 0, 0));
var heartPointsCount = pointsOrigin.length;
var targetPoints = [];
var pulse = function (kx, ky) {
for (i = 0; i < pointsOrigin.length; i++) {
targetPoints[i] = [];
targetPoints[i][0] = kx * pointsOrigin[i][0] + width / 2;
targetPoints[i][1] = ky * pointsOrigin[i][1] + height / 2;
}
};
var e = [];
for (i = 0; i < heartPointsCount; i++) {
var x = rand() * width;
var y = rand() * height;
e[i] = {
vx: 0,
vy: 0,
R: 2,
speed: rand() + 5,
q: ~~(rand() * heartPointsCount),
D: 2 * (i % 2) - 1,
force: 0.2 * rand() + 0.7,
f: 'hsla(0,' + ~~(40 * rand() + 60) + '%,' + ~~(60 * rand() + 20) + '%,.3)',
trace: [],
};
for (var k = 0; k < traceCount; k++) e[i].trace[k] = { x: x, y: y };
}
var config = {
traceK: 0.4,
timeDelta: 0.01,
};
var time = 0;
var loop = function () {
var n = -Math.cos(time);
pulse((1 + n) * 0.5, (1 + n) * 0.5);
time += (Math.sin(time) < 0 ? 9 : n > 0.8 ? 0.2 : 1) * config.timeDelta;
ctx.fillStyle = 'rgba(0,0,0,.1)';
ctx.fillRect(0, 0, width, height);
for (i = e.length; i--; ) {
var u = e[i];
var q = targetPoints[u.q];
var dx = u.trace[0].x - q[0];
var dy = u.trace[0].y - q[1];
var length = Math.sqrt(dx * dx + dy * dy);
if (10 > length) {
if (0.95 < rand()) {
u.q = ~~(rand() * heartPointsCount);
} else {
if (0.99 < rand()) {
u.D *= -1;
}
u.q += u.D;
u.q %= heartPointsCount;
if (0 > u.q) {
u.q += heartPointsCount;
}
}
}
u.vx += (-dx / length) * u.speed;
u.vy += (-dy / length) * u.speed;
u.trace[0].x += u.vx;
u.trace[0].y += u.vy;
u.vx *= u.force;
u.vy *= u.force;
for (k = 0; k < u.trace.length - 1; ) {
var T = u.trace[k];
var N = u.trace[++k];
N.x -= config.traceK * (N.x - T.x);
N.y -= config.traceK * (N.y - T.y);
}
ctx.fillStyle = u.f;
for (k = 0; k < u.trace.length; k++) {
ctx.fillRect(u.trace[k].x, u.trace[k].y, 1, 1);
}
}
ctx.fillStyle = 'rgba(255,255,255,1)';
for (i = u.trace.length + 13; i--; ) ctx.fillRect(targetPoints[i][0], targetPoints[i][1], 2, 2);
window.requestAnimationFrame(loop, canvas);
};
loop();
};
var s = document.readyState;
if (s === 'complete' || s === 'loaded' || s === 'interactive') init();
else document.addEventListener('DOMContentLoaded', init, false);
</script>
</body>
</html>