我在codepen上发现了这个片段,它是一个以随机速度向上漂浮的气泡动画,给人一种逼真的感觉,仿佛它是在啤酒或苏打玻璃杯中。
基本上我想用它作为我正在进行的项目的背景。我需要加快速度,但是当其他人移动速度相对较慢时,不要让其中一些移动得非常快。
该脚本使用math.random来生成速度,因为显然所有都需要不同速度才能获得逼真的效果,但我不能让它们以相当快的速度相互协作。这是代码:
var $bubbles = $('.bubbles');
function bubbles() {
// Settings
var min_bubble_count = 20, // Minimum number of bubbles
max_bubble_count = 40, // Maximum number of bubbles
min_bubble_size = 3, // Smallest possible bubble diameter (px)
max_bubble_size = 8; // Largest possible bubble diameter (px)
// Calculate a random number of bubbles based on our min/max
var bubbleCount = min_bubble_count + Math.floor(Math.random() * (max_bubble_count + 1));
// Create the bubbles
for (var i = 0; i < bubbleCount; i++) {
$bubbles.append('<div class="bubble-container"><div class="bubble"></div></div>');
}
// Now randomise the various bubble elements
$bubbles.find('.bubble-container').each(function(){
// Randomise the bubble positions (0 - 100%)
var pos_rand = Math.floor(Math.random() * 101);
// Randomise their size
var size_rand = min_bubble_size + Math.floor(Math.random() * (max_bubble_size + 1));
// Randomise the time they start rising (0-15s)
var delay_rand = Math.floor(Math.random() * 15);
// Randomise their speed (3-8s)
var speed_rand = 3 + Math.floor(Math.random() * 3);
// Cache the this selector
var $this = $(this);
// Apply the new styles
$this.css({
'left' : pos_rand + '%',
'-webkit-animation-duration' : speed_rand + 's',
'-moz-animation-duration' : speed_rand + 's',
'-ms-animation-duration' : speed_rand + 's',
'animation-duration' : speed_rand + 's',
'-webkit-animation-delay' : delay_rand + 's',
'-moz-animation-delay' : delay_rand + 's',
'-ms-animation-delay' : delay_rand + 's',
'animation-delay' : delay_rand + 's'
});
$this.children('.bubble').css({
'width' : size_rand + 'px',
'height' : size_rand + 'px'
});
});
}
// In case users value their laptop battery life
// Allow them to turn the bubbles off
$('.bubble-toggle').click(function(){
if($bubbles.is(':empty')) {
bubbles();
$bubbles.show();
$(this).text('Bubbles Off');
} else {
$bubbles.fadeOut(function(){
$(this).empty();
});
$(this).text('Bubbles On');
}
return false;
});
bubbles();
这是CSS:
// Sass Mixins
// Animation Mixin
@mixin animate($animation, $duration, $repeat, $easing) {
-webkit-animation: $animation $duration $repeat $easing;
-moz-animation: $animation $duration $repeat $easing;
-ms-animation: $animation $duration $repeat $easing;
animation: $animation $duration $repeat $easing;
}
// Keyframes Mixin
// https://gist.github.com/ericam/1607696
@mixin keyframes($name) {
@-webkit-keyframes #{$name} {
@content;
}
@-moz-keyframes #{$name} {
@content;
}
@-ms-keyframes #{$name} {
@content;
}
@keyframes #{$name} {
@content;
}
}
// Main Styles
html,
body {
height: 100%;
}
body {
background: #09f;
@include background-image(linear-gradient(bottom, #09f, #45d1ff));
}
// Bubble Styles
.bubbles {
position: relative;
overflow: hidden;
width: 100%;
height: 100%;
margin: 0 auto;
}
.bubble-container {
position: absolute;
bottom: 0;
@include animate(bubblerise, 4s, infinite, ease-in);
@include opacity(0);
}
.bubble {
width: 6px;
height: 6px;
margin: 0 auto;
border: 1px solid rgba(255,255,255,0.5);
background: rgba(255,255,255,0.25);
@include border-radius(10px);
@include animate(bubblewobble, 0.4s, infinite, linear);
}
// Keyframe Animations
@include keyframes(bubblerise) {
0% {
bottom: 0;
@include opacity(0);
}
5% {
bottom: 0;
@include opacity(1);
}
99% {
@include opacity(1);
}
100% {
bottom: 100%;
@include opacity(0);
}
}
@include keyframes(bubblewobble) {
0% {
margin-left: 0;
}
50% {
margin-left: 2px;
}
}
所以基本上我试着编辑这一部分:
// Randomise their speed (3-8s)
var speed_rand = 3 + Math.floor(Math.random() * 3);
到此:
// Randomise their speed (3-8s)
var speed_rand = 2 + Math.floor(Math.random() * 0.5);
它会加速气泡,但是它们会从页面底部开始同时移动,这使得它看起来不切实际,有些也比其他更快。
答案 0 :(得分:1)
通过更改3 - &gt; 0.5,你降低了速度,但也减少了变化(实际上,使所有速度都相同,因为Math.floor(Math.random() * 0.5)
总是为零)。您可能希望改为增加第一个值:
var speed_rand = 0.5 + Math.random() * 2;
^ ^
min time: 0.5 sec variability: add between 0 and 2 sec