javascript - Calculate map polygon Width and Height -

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let's have map:

<map name="diffmap1" id="diffmap1" class="mymap"> <area shape="poly" coords="152,347,253,292,264,307,167,358" class="diff diff1"> <area shape="poly" coords="93,244,164,215,171,233,97,264" class="diff diff2"> </map>

and jquery:

$('.diff').click(function(e){ //code here });

how can calculate maximum height , width of each polygon?

here html code:

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script> <img src="planets.gif" width="145" height="126" alt="planets" usemap="#diffmap1"> <map name="diffmap1" id="diffmap1" class="mymap"> <area id="area1" shape="poly" coords="152,347,253,292,264,307,167,358" class="diff diff1"> <area id="area2" shape="poly" coords="93,244,164,215,171,233,97,264" class="diff diff2"> </map>

and js code:

function getdistance(p1,p2){     return math.sqrt((p2.y - p1.y)*(p2.y - p1.y) + (p2.x - p1.x)*(p2.x - p1.x)); } $(document).ready(function(){     var area_distances_min_max = new object();     $.each($('area'), function(){         var arr_coords = $(this).attr('coords').split(',');         var = 0;         var k = 0;         var arr_real_coords = new array();         while(i<arr_coords.length){             var obj = new object();             obj.x = arr_coords[i];             obj.y = arr_coords[++i];             arr_real_coords.push(obj);             i++;             k++;         }          var arr_distances = new array();         $.each(arr_real_coords, function(){             var current_coord = this;             $.each(arr_real_coords, function(){                 if(getdistance(current_coord,this)>0)arr_distances.push(getdistance(current_coord,this))             })         })          var obj = new object();          obj.max = math.max.apply(math,arr_distances);          obj.min = math.min.apply(math,arr_distances);           var id = $(this).attr('id')         area_distances_min_max[id] = obj;     })     console.log(area_distances_min_max); })

in array area_distances_min_max stored min , max distances between points, can check result in console here: http://jsfiddle.net/aaa_borza/eer8k/18/.

best regards!


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