html - Javascript: making two circles follow cursor independently, without redundency -


i'm trying yellow , red circles in js fiddle below follow cursor independently, how can generalize code if add more circle divs don't have copy redundant code?

http://jsfiddle.net/fhmkf/218/

the code has lot of redudency:

// first circle variables var center = {     x: $(".container").width()/2 - 15,      y: $(".container").height()/2 - 15 }; var distancethreshold = $(".container").width()/2 - 15; var mousex = 0, mousey = 0;  // second circle variables var center2 = {     x2: $(".container2").width()/2 - 25,      y2: $(".container2").height()/2 - 25 }; var distancethreshold2 = $(".container2").width()/2 - 25; var mousex2 = 0, mousey2 = 0;   $(window).mousemove(function(e){     var d = {         x: e.pagex - center.x,         y: e.pagey - center.y    };    var distance = math.sqrt(d.x*d.x + d.y*d.y);    if (distance < distancethreshold) {      mousex = e.pagex;      mousey = e.pagey;    } else {      mousex = d.x / distance * distancethreshold + center.x;      mousey = d.y / distance * distancethreshold + center.y;    }     var d2 = {         x2: e.pagex - 200 - center2.x2,         y2: e.pagey - 200 - center2.y2    };    var distance2 = math.sqrt(d2.x2*d2.x2 + d2.y2*d2.y2);    if (distance2 < distancethreshold2) {      mousex2 = e.pagex - 200;      mousey2 = e.pagey - 200;    } else {      mousex2 = d2.x2 / distance2 * distancethreshold2 + center2.x2;      mousey2 = d2.y2 / distance2 * distancethreshold2 + center2.y2;    } });  // cache selector var follower = $("#follower"); var xp = 0, yp = 0; var loop = setinterval(function(){     // change 12 alter damping higher slower     xp += (mousex - xp) / 2;     yp += (mousey - yp) / 2;     follower.css({left:xp, top:yp});  }, 30);  // cache selector var follower2 = $("#follower2"); var xp2 = 0, yp2 = 0; var loop2 = setinterval(function(){     // change 12 alter damping higher slower     xp2 += (mousex2 - xp2) / 2;     yp2 += (mousey2 - yp2) / 2;     follower2.css({left:xp2, top:yp2});  }, 30);

just create class circles:

(jsfiddle)

var circle = function(container, follower, r){     var center = {         x: $(container).width()/2 - r,          y: $(container).height()/2 - r     };     var distancethreshold = $(container).width()/2 - r;     var mousex = 0, mousey = 0;      $(window).mousemove(function(e){          var d = {             x: e.pagex - center.x,             y: e.pagey - center.y         };         var distance = math.sqrt(d.x*d.x + d.y*d.y);         if (distance < distancethreshold) {             mousex = e.pagex;             mousey = e.pagey;         } else {             mousex = d.x / distance * distancethreshold + center.x;             mousey = d.y / distance * distancethreshold + center.y;         }     });      // cache selector     var follower = $(follower);     var xp = 0, yp = 0;     var loop = setinterval(function(){         // change 12 alter damping higher slower         xp += (mousex - xp) / 2;         yp += (mousey - yp) / 2;         follower.css({left:xp, top:yp});     }, 30); };  var c1 = new circle(".container", "#follower", 15); var c2 = new circle(".container2", "#follower2", 25);

if want control circles after circle object has been initialized, add public "methods" class: this.methodname = function(){ }


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