Hello I was trying to find a solution for a small script that can rotate objects around 1 center but it seems a bit too tricky for me.
I've found almost perfect solution and tried to modify it to suit my needs but there's a problem.
I'm trying to make 3 objects with text to rotate with same speed, same orbit but different start positions as if they were apexes(vertices) of equilateral triangle.
Here's my fiddle so far:
( function ( $ ) {
jQuery.fn.orbit = function(s, options){
var settings = {
orbits: 1 // Number of times to go round the orbit e.g. 0.5 = half an orbit
,period: 3000 // Number of milliseconds to complete one orbit.
,maxfps: 25 // Maximum number of frames per second. Too small gives "flicker", too large uses lots of CPU power
,clockwise: false // Direction of rotation.
};
$.extend(settings, options); // Merge the supplied options with the default settings.
return(this.each(function(){
var p = $(this);
/* First obtain the respective positions */
var p_top = p.css('top' ),
p_left = p.css('left'),
s_top = s.css('top' ),
s_left = s.css('left');
/* Then get the positions of the centres of the objects */
var p_x = parseInt(p_top ) + p.height()/2,
p_y = parseInt(p_left) + p.width ()/2,
s_x = parseInt(s_top ) + s.height()/2,
s_y = parseInt(s_left) + s.width ()/2;
/* Find the Adjacent and Opposite sides of the right-angled triangle */
var a = s_x - p_x,
o = s_y - p_y;
/* Calculate the hypotenuse (radius) and the angle separating the objects */
var r = Math.sqrt(a*a + o*o);
var theta = Math.acos(a / r);
/* Calculate the number of iterations to call setTimeout(), the delay and the "delta" angle to add/subtract */
var niters = Math.ceil(Math.min(4 * r, settings.period, 0.001 * settings.period * settings.maxfps));
var delta = 2*Math.PI / niters;
var delay = settings.period / niters;
if (! settings.clockwise) {delta = -delta;}
niters *= settings.orbits;
/* create the "timeout_loop function to do the work */
var timeout_loop = function(s, r, theta, delta, iter, niters, delay, settings){
setTimeout(function(){
/* Calculate the new position for the orbiting element */
var w = theta + iter * delta;
var a = r * Math.cos(w);
var o = r * Math.sin(w);
var x = parseInt(s.css('left')) + (s.height()/2) - a;
var y = parseInt(s.css('top' )) + (s.width ()/2) - o;
/* Set the CSS properties "top" and "left" to move the object to its new position */
p.css({top: (y - p.height()/2),
left: (x - p.width ()/2)});
/* Call the timeout_loop function if we have not yet done all the iterations */
if (iter < (niters - 1)) timeout_loop(s, r, theta, delta, iter+1, niters, delay, settings);
}, delay);
};
/* Call the timeout_loop function */
timeout_loop(s, r, theta, delta, 0, niters, delay, settings);
}));
}
}) (jQuery);
$('#object1' ).orbit($('#center' ), {orbits: 2, period: 8000});
$('#object2' ).orbit($('#center' ), {orbits: 4, period: 4000});
$('#object3' ).orbit($('#center' ), {orbits: 8, period: 2000});
HTML:
<h1> Example</h1>
<div id='rotation'>
<div id='center' >C</div>
<div id='object1' >Text1</div>
<div id='object2' >Text2</div>
<div id='object3' >Text3</div>
</div>
CSS:
#rotation {position: relative; width: 600px; height: 600px; background-color: #898989}
#center {position: absolute; width: 20px; height: 20px;
top: 300px; left: 300px; background-color: #ffffff;
-moz-border-radius: 40px; border-radius: 40px;
text-align: center; line-height: 15px;
}
#object1 {position: absolute; width: 36px; height: 36px;
top: 300px; left: 200px; background-color: #ff8f23;
-moz-border-radius: 18px; border-radius: 18px;
text-align: center; line-height: 30px;
}
#object2 {position: absolute; width: 36px; height: 36px;
top: 300px; left: 200px; background-color: #ff8f23;
-moz-border-radius: 18px; border-radius: 18px;
text-align: center; line-height: 30px;
}
#object3 {position: absolute; width: 36px; height: 36px;
top: 300px; left: 200px; background-color: #ff8f23;
-moz-border-radius: 18px; border-radius: 18px;
text-align: center; line-height: 30px;
}
I used different speed and revolutions for each object because I can't figure out how to set different start positions without messing up. If I touch x,y coordinates of any object in CSS then the orbiting messes up. It seems that object positions calculations are connected. And if I change coordinates then the calculation also changes. But I can't figure out how to fix this.