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
|
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Animation</title>
<script src="../dist/zrender.js"></script>
<!-- <script src="https://cdn.jsdelivr.net/npm/zrender@4.2.0/dist/zrender.js"></script> -->
<meta name="viewport" content="width=device-width, initial-scale=1" />
</head>
<body>
<h2>Move mouse. It is expected that animation start immediately without lag.</h2>
<div>
Circles: <input id="count" value="5000" />
Throttle Rate: <input id="throttle-rate" value="50" />
<button id="ok">OK</button>
</div>
<div id="main" style="width:800px;height:600px;"></div>
<script type="text/javascript">
refresh();
var zr;
var throttleRate;
var count;
function refresh() {
count = +document.getElementById('count').value;
throttleRate = +document.getElementById('throttle-rate').value;
zr && zr.dispose();
init();
}
function init() {
zr = zrender.init(document.getElementById('main'));
var lastTrigger = +new Date();
var timer;
var record = window.record = [];
var recordLimit = 300;
var lastTick = 0;
// zr.animation.on('frame', function () {
// if (record.length > recordLimit) {
// record.length = 0;
// }
// var now = +new Date();
// var gap = now - lastTick;
// record.push(gap < 30 ? '-' : gap);
// lastTick = now;
// }, this);
var gradient = new zrender.LinearGradient();
gradient.addColorStop(0, 'red');
gradient.addColorStop(1, 'black');
var viewWidth = zr.getWidth();
var viewHeight = zr.getHeight();
var center = [viewWidth / 2, viewHeight / 2];
var baseRadius = Math.min(viewWidth, viewHeight) * 0.3;
var els = [];
for (var i = 0; i < count; i++) {
var theta = Math.random() * Math.PI * 2;
var circle = new zrender.Circle({
position: [
center[0] + (baseRadius + Math.random() * 60) * Math.cos(theta),
center[1] + (baseRadius + Math.random() * 60) * Math.sin(theta)
],
shape: {
cx: 0,
cy: 0,
r: 3
},
style: {
fill: 'red',
opacity: 0.2
},
onclick: (function (i) {
return function () {
alert(i);
}
})(i)
});
circle.___ii = i;
els.push(circle);
zr.add(circle);
}
var update = throttle(function (point) {
console.time('animation');
for (var i = 0; i < els.length; i++) {
var el = els[i];
var dist = Math.pow(
Math.pow(point[0] - el.position[0], 2)
+ Math.pow(point[1] - el.position[1], 2),
0.5
);
if (dist < 0.1) {
return;
}
var ratio = (baseRadius + Math.random() * 60) / dist;
var targetPostion = [
point[0] + (el.position[0] - point[0]) * ratio,
point[1] + (el.position[1] - point[1]) * ratio
];
// el.animateTo({
// position: targetPostion
// }, { duration: 3000, easing: 'elasticOut' });
// el.stopAnimation().animate('')
// .all(3000, {
// position: targetPostion
// })
// .start('elasticOut');
el.stopAnimation().animate('')
.when(3000, {
position: targetPostion
})
.start('elasticOut');
}
console.timeEnd('animation');
}, throttleRate);
zr.on('mousemove', function (e) {
update([e.offsetX, e.offsetY]);
});
}
function throttle(fn, delay, debounce) {
var currCall;
var lastCall = 0;
var lastExec = 0;
var timer = null;
var diff;
var scope;
var args;
var debounceNextCall;
delay = delay || 0;
function exec() {
lastExec = (new Date()).getTime();
timer = null;
fn.apply(scope, args || []);
}
var cb = function () {
currCall = (new Date()).getTime();
scope = this;
args = arguments;
var thisDelay = debounceNextCall || delay;
var thisDebounce = debounceNextCall || debounce;
debounceNextCall = null;
diff = currCall - (thisDebounce ? lastCall : lastExec) - thisDelay;
clearTimeout(timer);
if (thisDebounce) {
timer = setTimeout(exec, thisDelay);
}
else {
if (diff >= 0) {
exec();
}
else {
timer = setTimeout(exec, -diff);
}
}
lastCall = currCall;
};
return cb;
}
</script>
</body>
</html>
|
