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Home Backend Development PHP Tutorial 怎么PHP算法怎么写

怎么PHP算法怎么写

Jun 23, 2016 pm 01:58 PM
php algorithm


.we
{
 border-radius: 62px; /* 所有角都使用半径为5px的圆角,此属性为CSS3标准属性 */
    -moz-border-radius:62px; /* Mozilla浏览器的私有属性 */
    -webkit-border-radius: 62px; /* Webkit浏览器的私有属性 */
    background:#000;
    width:62px; height:62px;
    border-radius: 62px 62px 62px 62px; /* 四个半径值分别是左上角、右上角、右下角和左下角 */
    margin-left: 15px; margin-top:15px; float: left; color: #FFF;
    color: #FFF;
}


回复讨论(解决方案)

想要干嘛没说清楚啊

html5?

如果纯粹想要实现这个效果
用html5 canvas好实现

表示看不懂。。。默默流泪

想要干嘛没说清楚啊


.we{ border-radius: 62px; /* 所有角都使用半径为5px的圆角,此属性为CSS3标准属性 */    -moz-border-radius:62px; /* Mozilla浏览器的私有属性 */    -webkit-border-radius: 62px; /* Webkit浏览器的私有属性 */    background:#000;    width:62px; height:62px;    border-radius: 62px 62px 62px 62px; /* 四个半径值分别是左上角、右上角、右下角和左下角 */    margin-left: 15px; margin-top:15px; float: left; color: #FFF;    color: #FFF;}<div class="we"></div>
Copy after login
Copy after login

想要干嘛没说清楚啊


.we{ border-radius: 62px; /* 所有角都使用半径为5px的圆角,此属性为CSS3标准属性 */    -moz-border-radius:62px; /* Mozilla浏览器的私有属性 */    -webkit-border-radius: 62px; /* Webkit浏览器的私有属性 */    background:#000;    width:62px; height:62px;    border-radius: 62px 62px 62px 62px; /* 四个半径值分别是左上角、右上角、右下角和左下角 */    margin-left: 15px; margin-top:15px; float: left; color: #FFF;    color: #FFF;}<div class="we"></div>
Copy after login
Copy after login


我现在不是画了个圆了啊 我要做成效果图那样。。。 用算法 画上去。。怎么画。。。1个个画 到时候维护太麻烦了

求出各圆点在图中的位置

$a = rand(0, 2 * M_PI); //极角$r = rand(0, $R); //极距$x = $ox + $r * cos($a);$y = $oy + $r * sin($a);
Copy after login
Copy after login

若要保证各圆点不相交,还需另行计算两点间距离:
sqrt(pow($x1-$x2),2) + pow($y1-$y2),2)) / 2 <= 圆点半径

圆的大小和位置这些数据是怎么来的?这是关键点。

求出各圆点在图中的位置

$a = rand(0, 2 * M_PI); //极角$r = rand(0, $R); //极距$x = $ox + $r * cos($a);$y = $oy + $r * sin($a);
Copy after login
Copy after login

若要保证各圆点不相交,还需另行计算两点间距离:
sqrt(pow($x1-$x2),2) + pow($y1-$y2),2)) / 2 

看不懂。。能帮我写下么 写成我的效果
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