Farenin etrafında dönen lastik kutular...

<img src="bullet.gif" height=11 width=11>

</div>

<div id="dot1" style="position: absolute; height: 11; width: 11;">

<img src="bullet.gif" height=11 width=11>

</div>

<div id="dot2" style="position: absolute; height: 11; width: 11;">

<img src="bullet.gif" height=11 width=11>

</div>

<div id="dot3" style="position: absolute; height: 11; width: 11;">

<img src="bullet.gif" height=11 width=11>

</div>

<div id="dot4" style="position: absolute; height: 11; width: 11;">

<img src="bullet.gif" height=11 width=11>

</div>

<div id="dot5" style="position: absolute; height: 11; width: 11;">

<img src="bullet.gif" height=11 width=11>

</div>

<div id="dot6" style="position: absolute; height: 11; width: 11;">

<img src="bullet.gif" height=11 width=11>

</div>



<script LANGUAGE="JavaScript">

<!-- hide code



var nDots = 7;



var Xpos = 0;

var Ypos = 0;



// fixed time step, no relation to real time

var DELTAT = .01;

// size of one spring in pixels

var SEGLEN = 10;

// spring constant, stiffness of springs

var SPRINGK = 10;

// all the physics is bogus, just picked stuff to

// make it look okay

var MASS = 1;

// Positive XGRAVITY pulls right, negative pulls left

// Positive YGRAVITY pulls down, negative up

var XGRAVITY = 0;

var YGRAVITY = 50;

// RESISTANCE determines a slowing force proportional to velocity

var RESISTANCE = 10;

// stopping criterea to prevent endless jittering

// doesn't work when sitting on bottom since floor

// doesn't push back so acceleration always as big

// as gravity

var STOPVEL = 0.1;

var STOPACC = 0.1;

var DOTSIZE = 11;

// BOUNCE is percent of velocity retained when

// bouncing off a wall

var BOUNCE = 0.75;



var isNetscape = navigator.appName=="Netscape";



// always on for now, could be played with to

// let dots fall to botton, get thrown, etc.

var followmouse = true;



var dots = new Array();

init();



function init()

{

var i = 0;

for (i = 0; i < nDots; i++) {

dots = new dot(i);

}



if (!isNetscape) {

// I only know how to read the locations of the

// <LI> items in IE

//skip this for now

// setInitPositions(dots)

}



// set their positions

for (i = 0; i < nDots; i++) {

dots.obj.left = dots.X;

dots.obj.top = dots.Y;

}





if (isNetscape) {

// start right away since they are positioned

// at 0, 0

startanimate();

} else {

// let dots sit there for a few seconds

// since they're hiding on the real bullets

setTimeout("startanimate()", 1000);

}

}







function dot(i)

{

this.X = Xpos;

this.Y = Ypos;

this.dx = 0;

this.dy = 0;

if (isNetscape) {

this.obj = eval("document.dot" + i);

} else {

this.obj = eval("dot" + i + ".style");

}

}





function startanimate() {

setInterval("animate()", 20);

}





// This is to line up the bullets with actual LI tags on the page

// Had to add -DOTSIZE to X and 2*DOTSIZE to Y for IE 5, not sure why

// Still doesn't work great

function setInitPositions(dots)

{

// initialize dot positions to be on top

// of the bullets in the <ul>

var startloc = document.all.tags("LI");

var i = 0;

for (i = 0; i < startloc.length && i < (nDots - 1); i++) {

dots[i+1].X = startloc.offsetLeft

startloc.offsetParent.offsetLeft - DOTSIZE;

dots[i+1].Y = startloc.offsetTop +

startloc.offsetParent.offsetTop + 2*DOTSIZE;

}

// put 0th dot above 1st (it is hidden)

dots[0].X = dots[1].X;

dots[0].Y = dots[1].Y - SEGLEN;

}



// just save mouse position for animate() to use

function MoveHandler(e)

{

Xpos = e.pageX;

Ypos = e.pageY;

return true;

}



// just save mouse position for animate() to use

function MoveHandlerIE() {

Xpos = window.event.x + document.body.scrollLeft;

Ypos = window.event.y + document.body.scrollTop;

}



if (isNetscape) {

document.captureEvents(Event.MOUSEMOVE);

document.onMouseMove = MoveHandler;

} else {

document.onmousemove = MoveHandlerIE;

}





function vec(X, Y)

{

this.X = X;

this.Y = Y;

}



// adds force in X and Y to spring for dot on dot[j]

function springForce(i, j, spring)

{

var dx = (dots.X - dots[j].X);

var dy = (dots.Y - dots[j].Y);

var len = Math.sqrt(dx*dx + dy*dy);

if (len > SEGLEN) {

var springF = SPRINGK * (len - SEGLEN);

spring.X += (dx / len) * springF;

spring.Y += (dy / len) * springF;

}

}





function animate() {

// dots[0] follows the mouse,

// though no dot is drawn there

var start = 0;

if (followmouse) {

dots[0].X = Xpos;

dots[0].Y = Ypos;

start = 1;

}



for (i = start ; i < nDots; i++ ) {



var spring = new vec(0, 0);

if (i > 0) {

springForce(i-1, i, spring);

}

if (i < (nDots - 1)) {

springForce(i+1, i, spring);

}



// air resisitance/friction

var resist = new vec(-dots.dx * RESISTANCE,

-dots.dy * RESISTANCE);



// compute new accel, including gravity

var accel = new vec((spring.X + resist.X)/MASS + XGRAVITY,

(spring.Y + resist.Y)/ MASS + YGRAVITY);



// compute new velocity

dots.dx += (DELTAT * accel.X);

dots.dy += (DELTAT * accel.Y);



// stop dead so it doesn't jitter when nearly still

if (Math.abs(dots.dx) < STOPVEL &&

Math.abs(dots.dy) < STOPVEL &&

Math.abs(accel.X) < STOPACC &&

Math.abs(accel.Y) < STOPACC) {

dots.dx = 0;

dots.dy = 0;

}



// move to new position

dots.X += dots.dx;

dots.Y += dots.dy;



// get size of window

var height, width;

if (isNetscape) {

height = window.innerHeight + window.pageYOffset;

width = window.innerWidth + window.pageXOffset;

} else {

height = document.body.clientHeight + document.body.scrollTop;

width = document.body.clientWidth + document.body.scrollLeft;

}



// bounce off 3 walls (leave ceiling open)

if (dots.Y >= height - DOTSIZE - 1) {

if (dots.dy > 0) {

dots.dy = BOUNCE * -dots.dy;

}

dots.Y = height - DOTSIZE - 1;

}

if (dots.X >= width - DOTSIZE) {

if (dots.dx > 0) {

dots.dx = BOUNCE * -dots.dx;

}

dots.X = width - DOTSIZE - 1;

}

if (dots.X < 0) {

if (dots.dx < 0) {

dots.dx = BOUNCE * -dots.dx;

}

dots.X = 0;

}



// move img to new position

dots.obj.left = dots.X;

dots.obj.top = dots.Y;

}

}



// end code hiding -->

</script>