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Example code of JS keyword spherical rotation effect

Source: Internet
Author: User
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Sometimes it is quite good to check the information on the Internet and see the keyword rotation on others' blogs. So I searched for its implementation on the Internet. Okay, write it on your own.

HTML:
Copy codeThe Code is as follows:
<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312"/>
<Title> </title>
<Link rel = "stylesheet" href = "css/style.css"/>
<Script type = "text/javascript" src = "js/lsn. js"> </script>
</Head>
<Body>
<! -- Code start -->
<Div id = "div1">
<A> Asp.net webform </a>
<A> Asp.net mvc </a>
<A> EF </a>
<A> Castle </a>
<A> Spring.net </a>
<A> nhib.pdf </a>
<A> WCF </a>
<A> WPF </a>
<A> AOP </a>
<A> IoC </a>
<A> SQL </a>
<A> Javascript </a>
<A> Jquery </a>
<A> KendoUI </a>
</Div>
</Body>
</Html>

CSS:
Copy codeThe Code is as follows:
# Div1 {height: 400px; width: pixel PX; position: relative; margin: 10px auto ;}
# Div1 a {position: absolute; top: 0px; left: 0px; font-weight: bold; padding: 3px 6px; color: black; text-decoration: none ;}
# Div1 a: hover {border: 1px solid # eee; background: # ccc; border-radius: 5px ;}

Since it is a keyword, I think it is cool to add different colors to them. Initialize an array to store color values, and then randomly assign them to tags.
Copy codeThe Code is as follows:
Var colors = ["# FF60AF", "# 9F35FF", "# FF2D2D", "# 6C6C6C", "#003D79", "#00 AEAE ", "#019858"];
Var rand = Math. ceil (Math. random () * 6 );
AA [I]. style. color = colors [rand];

JS:
Copy codeThe Code is as follows:
Var radius = 100;
Var dtr = Math. PI/180;
Var d = 300;

Var mcList = [];
Var active = false;
Var lasta = 1;
Var lastb = 1;
Var distr = true;
Var tspeed = 2;
Var size = 250;

Var mouseX = 0;
Var mouseY = 0;

Var howElliptical = 1;

Var aA = null;
Var oDiv = null;

Window. onload = function ()
{
Var I = 0;
Var oTag = null;

ODiv = document. getElementById ('div1 ');

AA = oDiv. getElementsByTagName ('A ');

For (I = 0; I <aA. length; I ++)
{

Var colors = ["# FF60AF", "# 9F35FF", "# FF2D2D", "# 6C6C6C", "#003D79", "#00 AEAE ", "#019858"];
Var rand = Math. ceil (Math. random () * 6 );
AA [I]. style. color = colors [rand];

OTag = {};

OTag. offsetWidth = aA [I]. offsetWidth;
OTag. offsetHeight = aA [I]. offsetHeight;

McList. push (oTag );
}

SineCosine (0, 0 );

PositionAll ();

ODiv. onmouseover = function ()
{
Active = true;
};

ODiv. onmouseout = function ()
{
Active = false;
};

ODiv. onmousemove = function (ev)
{
Var oEvent = window. event | ev;

MouseX = oEvent. clientX-(oDiv. offsetLeft + oDiv. offsetWidth/2 );
MouseY = oEvent. clientY-(oDiv. offsetTop + oDiv. offsetHeight/2 );

MouseX/= 5;
MouseY/= 5;
};

SetInterval (update, 10 );
};

Function update ()
{
Var;
Var B;

If (active)
{
A = (-Math. min (Math. max (-mouseY,-size), size)/radius) * tspeed;
B = (Math. min (Math. max (-mouseX,-size), size)/radius) * tspeed;
}
Else
{
A = lasta * 0.98;
B = lastb * 0.98;
}

Lasta =;
Lastb = B;

If (Math. abs (a) <= 0.01 & Math. abs (B) <= 0.01)
{
Return;
}

Var c = 0;
SineCosine (a, B, c );
For (var j = 0; j <mcList. length; j ++)
{
Var rx1 = mcList [j]. cx;
Var ry1 = mcList [j]. cy * ca + mcList [j]. cz * (-sa );
Var rz1 = mcList [j]. cy * sa + mcList [j]. cz * ca;

Var rx2 = rx1 * cb + rz1 * sb;
Var ry2 = ry1;
Var rz2 = rx1 * (-sb) + rz1 * cb;

Var rx3 = rx2 * cc + ry2 * (-SC );
Var ry3 = rx2 * SC + ry2 * cc;
Var rz3 = rz2;

McList [j]. cx = rx3;
McList [j]. cy = ry3;
McList [j]. cz = rz3;

Per = d/(d + rz3 );

McList [j]. x = (howElliptical * rx3 * per)-(howElliptical * 2 );
McList [j]. y = ry3 * per;
McList [j]. scale = per;
McList [j]. alpha = per;

McList [j]. alpha = (mcList [j]. alpha-0.6) * (10/6 );
}

DoPosition ();
DepthSort ();
}

Function depthSort ()
{
Var I = 0;
Var aTmp = [];

For (I = 0; I <aA. length; I ++)
{
ATmp. push (aA [I]);
}

ATmp. sort
(
Function (vItem1, vItem2)
{
If (vItem1.cz> vItem2.cz)
{
Return-1;
}
Else if (vItem1.cz <vItem2.cz)
{
Return 1;
}
Else
{
Return 0;
}
}
);

For (I = 0; I <aTmp. length; I ++)
{
ATmp [I]. style. zIndex = I;
}
}

Function positionAll ()
{
Var phi = 0;
Var theta = 0;
Var max = mcList. length;
Var I = 0;

Var aTmp = [];
Var oFragment = document. createDocumentFragment ();

// Random sorting
For (I = 0; I <aA. length; I ++)
{
ATmp. push (aA [I]);
}

ATmp. sort
(
Function ()
{
Return Math. random () <0.5? 1:-1;
}
);

For (I = 0; I <aTmp. length; I ++)
{
OFragment. appendChild (aTmp [I]);
}

ODiv. appendChild (oFragment );

For (var I = 1; I <max + 1; I ++ ){
If (distr)
{
Phi = Math. acos (-1 + (2 * i-1)/max );
Theta = Math. sqrt (max * Math. PI) * phi;
}
Else
{
Phi = Math. random () * (Math. PI );
Theta = Math. random () * (2 * Math. PI );
}
// Coordinate Transformation
McList [I-1]. cx = radius * Math. cos (theta) * Math. sin (phi );
McList [I-1]. cy = radius * Math. sin (theta) * Math. sin (phi );
McList [I-1]. cz = radius * Math. cos (phi );

AA [I-1]. style. left = mcList [I-1]. cx + oDiv. offsetWidth/2-mcList [I-1]. offsetWidth/2 + 'px ';
AA [I-1]. style. top = mcList [I-1]. cy + oDiv. offsetHeight/2-mcList [I-1]. offsetHeight/2 + 'px ';
}
}

Function doPosition ()
{
Var l = oDiv. offsetWidth/2;
Var t = oDiv. offsetHeight/2;
For (var I = 0; I <mcList. length; I ++)
{
AA [I]. style. left = mcList [I]. cx + l-mcList [I]. offsetWidth/2 + 'px ';
AA [I]. style. top = mcList [I]. cy + t-mcList [I]. offsetHeight/2 + 'px ';

AA [I]. style. fontSize = Math. ceil (12 * mcList [I]. scale/2) + 8 + 'px ';

AA [I]. style. filter = "alpha (opacity =" + 100 * mcList [I]. alpha + ")";
AA [I]. style. opacity = mcList [I]. alpha;
}
}

Function sineCosine (a, B, c)
{
Sa = Math. sin (a * dtr );
Ca = Math. cos (a * dtr );
Sb = Math. sin (B * dtr );
Cb = Math. cos (B * dtr );
SC = Math. sin (c * dtr );
Cc = Math. cos (c * dtr );
}

The final result is as follows:

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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