Pelajaran 12 : Buat objek berpusing

Bertemu kembali kita dalam ruang pelajaran. Sebelum ini kita sudah belajar cara nak buat salji dan hujan bunga merah,kali ini saya akan tunjukkan cara nak hasilkan objek berpusing sekeliling cursor.


Ikuti tutorial di bawah.

1. Dari dashboard > design > add a gadget > HTML/javascript.

2. Copy dan paste kod di bawah ke dalam ruangan HTML/javascript yang anda buka.
(tidak faham.?)

<script language="JavaScript" type="text/javascript">

var xCol = "#FF0000";
var yCol = "#FFFF00";
var zCol = "#0000FF";

var n = 6; //number of dots per trail.
var t = 40; //setTimeout speed.
var s = 0.2; //effect speed.

var r,h,w;
var d = document;
var my = 10;
var mx = 10;
var stp = 0;
var evn = 360/3;
var vx = new Array();
var vy = new Array();
var vz = new Array();
var dy = new Array();
var dx = new Array();

var pix = "px";

var strictmod = ((document.compatMode) &&
document.compatMode.indexOf("CSS") != -1);

var domWw = (typeof window.innerWidth == "number");
var domSy = (typeof window.pageYOffset == "number");
var idx = d.getElementsByTagName('div').length;

for (i = 0; i < n; i++)
{
var dims = (i+1)/2;
d.write('<div id="x'+(idx+i)+'" style="position:absolute;'
+'top:0px;left:0px;width:'+dims+'px;height:'+dims+'px;'
+'background-color:'+xCol+';font-size:'+dims+'px"><\/div>'
+'<div id="y'+(idx+i)+'" style="position:absolute;top:0px;'
+'left:0px;width:'+dims+'px;height:'+dims+'px;'
+'background-color:'+yCol+';font-size:'+dims+'px"><\/div>'
+'<div id="z'+(idx+i)+'" style="position:absolute;top:0px;'
+'left:0px;width:'+dims+'px;height:'+dims+'px;'
+'background-color:'+zCol+';font-size:'+dims+'px"><\/div>');
}

if (domWw) r = window;
else
{
if (d.documentElement &&
typeof d.documentElement.clientWidth == "number" &&
d.documentElement.clientWidth != 0)
r = d.documentElement;
else
{
if (d.body && typeof d.body.clientWidth == "number")
r = d.body;
}
}

function winsize()
{
var oh,sy,ow,sx,rh,rw;
if (domWw)
{
if (d.documentElement && d.defaultView &&
typeof d.defaultView.scrollMaxY == "number")
{
oh = d.documentElement.offsetHeight;
sy = d.defaultView.scrollMaxY;
ow = d.documentElement.offsetWidth;
sx = d.defaultView.scrollMaxX;
rh = oh-sy;
rw = ow-sx;
}
else
{
rh = r.innerHeight;
rw = r.innerWidth;
}
h = rh;
w = rw;
}
else
{
h = r.clientHeight;
w = r.clientWidth;
}
}

function scrl(yx)
{
var y,x;
if (domSy)
{
y = r.pageYOffset;
x = r.pageXOffset;
}
else
{
y = r.scrollTop;
x = r.scrollLeft;
}
return (yx == 0)?y:x;
}

function mouse(e)
{
var msy = (domSy)?window.pageYOffset:0;
if (!e) e = window.event;
if (typeof e.pageY == 'number')
{
my = e.pageY - msy + 16;
mx = e.pageX + 6;
}
else
{
my = e.clientY - msy + 16;
mx = e.clientX + 6;
}
if (my > h-65) my = h-65;
if (mx > w-50) mx = w-50;
}

function assgn()
{
for (j = 0; j < 3; j++)
{
dy[j] = my + 50 * Math.cos(stp+j*evn*Math.PI/180) *

Math.sin((stp+j*25)/2) + scrl(0) + pix;
dx[j] = mx + 50 * Math.sin(stp+j*evn*Math.PI/180) *

Math.sin((stp+j*25)/2) * Math.sin(stp/4) + pix;
}
stp+=s;

for (i = 0; i < n; i++)
{
if (i < n-1)
{
vx[i].top = vx[i+1].top; vx[i].left = vx[i+1].left;
vy[i].top = vy[i+1].top; vy[i].left = vy[i+1].left;
vz[i].top = vz[i+1].top; vz[i].left = vz[i+1].left;
}
else
{
vx[i].top = dy[0]; vx[i].left = dx[0];
vy[i].top = dy[1]; vy[i].left = dx[1];
vz[i].top = dy[2]; vz[i].left = dx[2];
}
}
setTimeout(assgn,t);
}

function init()
{
for (i = 0; i < n; i++)
{
vx[i] = document.getElementById("x"+(idx+i)).style;
vy[i] = document.getElementById("y"+(idx+i)).style;
vz[i] = document.getElementById("z"+(idx+i)).style;
}
winsize();
assgn();
}

if (window.addEventListener)
{
window.addEventListener("resize",winsize,false);
window.addEventListener("load",init,false);
document.addEventListener("mousemove",mouse,false);
}
else
if (window.attachEvent)
{
window.attachEvent("onload",init);
document.attachEvent("onmousemove",mouse);
window.attachEvent("onresize",winsize);
}
</script>

3. Save dan lihat hasilnya.

TAMBAHAN.

i) Bagi sesiapa yang tukar warna objek tersebut, boleh tukar pada kod ini.
(mencari kod warna.?)

var xCol = "#FF0000";
var yCol = "#FFFF00";
var zCol = "#0000FF";

ii) Kod ini memerlukan anda menggunakan layout template.

sekian