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
| <!DOCTYPE html>
<html lang="fr">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Horloge fluide</title>
<meta name="Author" content="NoSmoking">
<meta name="DVP-discussion" content="d2090203">
<meta name="description" content="Affichage d'une horloge avec déplacement des aiguilles fluide.">
<style>
html, body {
margin: 0;
padding: 0;
font: 1em/1.5 Verdana,sans-serif;
}
h1, h2, h3 {
margin: .25em 0;
color: #069;
}
time {
float: right;
margin: .5em;
font-size: 0.9em;
color: #888;
}
main {
display: block;
margin: auto;
max-width: 60em;
}
#clock {
position: relative;
width: 60vh;
height: 60vh;
margin: auto;
background-image: url(_fond-clock.png);
background-position: center;
background-repeat: no-repeat;
background-size: 100% 100%;
}
#clock div {
box-shadow: 0 0 .5em transparent; /* anti crénelage ! */
will-change: transform;
}
#heures {
position: absolute;
top: 25%;
left: calc( 50% - 1.1vh);
width: 2.2vh;
height: 50%;
border-radius: 1.1vh;
background: linear-gradient(rgba(100,150,200,.7) 0%, rgba(50,100,150,.7) 50%, transparent 50%);
}
#minutes {
position: absolute;
top: 10%;
left: calc( 50% - .8vh);
width: 1.6vh;
height: 80%;
border-radius: .8vh;
background: linear-gradient(rgba(150,200,250,.8) 0%, rgba(50,100,150,.8) 50%, transparent 50%);
}
#secondes {
position: absolute;
top: 0%;
left: calc( 50% - .4vh);
width: .8vh;
height: 100%;
border-radius: .4vh;
background: linear-gradient(rgba(100,150,200,.9) 0%, rgba(0,50,150,.9) 60%, transparent 60%);
}
#center {
position: absolute;
top: 50%;
left: 50%;
width: 1.6vh;
height: 1.6vh;
border: .5vh solid #069;
border-radius: 50%;
background-color: #CCC;
transform: translate(-50%, -50%);
}
#info {
position: absolute;
bottom: 30%;
width: 100%;
text-align: center;
font-size: 5vh;
color: #069;
}
</style>
</head>
<body>
<main>
<header>
<time datetime="2020-09-09">Sept. 2020</time>
<h1>Horloge avec déplacement fluide</h1>
</header>
<div id="clock">
<div id="heures"></div>
<div id="minutes"></div>
<div id="secondes"></div>
<div id="center"></div>
<div id="info"></div>
</div>
<p><b>Nota</b> : La fluidité sur le déplacement des aiguilles des heures et des minutes n'est pas forcément perceptible.</p>
<footer>
<p>Voir la <a href="https://www.developpez.net/forums/showthread.php?t=2090203">discussion sur Developpez.com</a>
</footer>
</main>
<script>
"use strict";
const HEURE_ALPHA_MS = 360 / 43200000; // pas de 0.000008333333333333334
const MINUTE_ALPHA_MS = 360 / 3600000; // pas de 0.0001
const SECONDE_ALPHA_MS = 360 / 60000; // pas de 0.006
const elHeures = document.getElementById("heures");
const elMinutes = document.getElementById("minutes");
const elSecondes = document.getElementById("secondes");
const elInfo = document.getElementById("info");
function digitaleClock(date) {
const sDate = date.toLocaleString().split(" ").pop();
elInfo.textContent = sDate;
}
function analogiqueClock(date) {
const h = date.getHours();
const m = date.getMinutes();
const s = date.getSeconds();
const ms = date.getMilliseconds();
let angle;
// convert en millisecondes
const sToMs = (s * 1000) + ms;
const mToMs = ((m * 60) * 1000) + sToMs;
const hToMs = ((h * 3600) * 1000) + mToMs;
// draw Secondes
angle = (sToMs * SECONDE_ALPHA_MS) % 360;
elSecondes.style.transform = "rotate(" + angle + "deg)";
// draw Minutes
angle = (mToMs * MINUTE_ALPHA_MS) % 360;
elMinutes.style.transform = "rotate(" + angle + "deg)";
// draw Heures
angle = (hToMs * HEURE_ALPHA_MS) % 360;
elHeures.style.transform = "rotate(" + angle + "deg)";
}
function updateClock() {
const d = new Date();
analogiqueClock(d);
digitaleClock(d);
requestAnimationFrame(updateClock);
}
updateClock();
</script>
</body>
</html> |
