jquery - Simulate as3.0 hitTestobject in javascript -


im trying write function similar as3.0's hit test in javascript. place circles on screen defined in div tags, go through of circle see if positions overlap.

the contents in html file:

<div class="balls">   <script>     (i=0;i<10;i++){       document.write("<div id='ball"+i+"' class='ball'></div>");     }   </script> </div>

placing them using jquery:

var amount = 10; var height = 270; var width = 450;   function setballs(){     (i=0;i<amount;i++){       $("#ball"+i).css('top',parseint(math.random()*height)+'px');       $("#ball"+i).css('left',parseint(math.random()*width)+'px');       (j=0;j<i;j++){         hittest($("#ball"+i),$("#ball"+j));       }     } }

the hittest function called above:

function hittest(object1,object2){   var left1 = parseint(object1.css('left'));   var left2 = parseint(object2.css('left'));   var top1 = parseint(object1.css('top'));   var top2 = parseint(object2.css('top'));   var width1 = parseint(object1.width());   var width2 = parseint(object2.width());   var height1 = parseint(object1.height());   var height2 = parseint(object2.height());   var hortest = false;   var vertest = false;   if (((left1 >= left2)&&(left1 <= left2 + width2))||((left2 >= left1)&&(left2 <= left1 + width1))){     hortest = true;   }   if (((top1 >= top2)&&(top1 <= top2 + height2))||((top2 >= top1)&&(top2 <= top1 + height1))){     vertest = true;   }   if(hortest&&vertest){     console.log("hit");     object1.css('top',parseint(math.random()*height)+'px');     object1.css('left',parseint(math.random()*width)+'px');     hittest(object1,object2);   }  }

the stylesheet info:

.ball{   width:50px;   height:50px;   background:green;   border-radius:100%;   position:absolute; } .balls{   width:500px;   height:320px;   background:red;   position:absolute;   left:10px;   top:80px; }

can please shed light on why acting way?

thanks in advance

update: there mistake in algorithm. tried 20 "balls" , breaks each time

i have found mistake. in hittest, after have re positioned element, test against second element, , not against elements again. new function, works 100% follows:

placing balls:

function setballs(){   (i=0;i<amount;i++){     $("#ball"+i).css('top',parseint(math.random()*height)+'px');     $("#ball"+i).css('left',parseint(math.random()*width)+'px');  (j=0;j<i;j++){       hittest($("#ball"+i),$("#ball"+j),j);     }  } }

the hittest function:

function hittest(object1,object2,prevballs){   var left1 = parseint(object1.css('left'));   var left2 = parseint(object2.css('left'));   var top1 = parseint(object1.css('top'));   var top2 = parseint(object2.css('top'));   var width1 = parseint(object1.width());   var width2 = parseint(object2.width());   var height1 = parseint(object1.height());   var height2 = parseint(object2.height());   var hortest = false;   var vertest = false;   if (((left1 >= left2)&&(left1 <= left2 + width2))||((left2 >= left1)&&(left2 <= left1 + width1))){     hortest = true;   }   if (((top1 >= top2)&&(top1 <= top2 + height2))||((top2 >= top1)&&(top2 <= top1 + height1))){     vertest = true;   }   if(hortest&&vertest){     console.log("hit");     object1.css('top',parseint(math.random()*height)+'px');     object1.css('left',parseint(math.random()*width)+'px');     (j=0;j<prevballs;j++){       hittest(object1,$("#ball"+j),j);     }     hittest(object1,object2);   }  }

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