GoogleMap中扩展图形的画法

最近在帮一个朋友在GoogleMap上画扇形,GoogleMap本身不提供这种画法,所以需要自己去实现,无赖原来学过的数学也忘记的差不多了,只能求助网络。

国外有一个高手写了一个扩展,地址是:http://econym.org.uk/gmap/eshapes.htm

但里面没有扇形的画法,在此基础上自己增加了扇形的画法:

GPolyline扩展方法:

1 GPolyline.Sector = function(point, radius, sDegree, eDegree, colour, weight, opacity,opts) {
2 var points = [];
3 var step = ((eDegree - sDegree) / 10) || 10;
4
5 points.push(point);
6 for(var i=sDegree;i<eDegree + 0.001;i+=step){
7 points.push(EOffsetBearing(point,radius,i));
8 }
9 points.push(point);
10
11 return new GPolyline(points, colour, weight, opacity, opts);
12 }

GPolygon扩展方法:

1 GPolygon.Sector = function(point, radius, sDegree, eDegree, strokeColour, strokeWeight,Strokepacity, fillColour, fillOpacity, opts) {
2 var points = [];
3 var step = ((eDegree - sDegree) / 10) || 10;
4
5 points.push(point);
6 for(var i=sDegree;i<eDegree + 0.001;i+=step){
7 points.push(EOffsetBearing(point,radius,i));
8 }
9 points.push(point);
10
11 return new GPolygon(points, strokeColour, strokeWeight,Strokepacity, fillColour, fillOpacity, opts);
12 }

使用方法见Demo,下载地址是:http://files.cnblogs.com/liongis/eshapes.rar

posted @ 2011-02-19 23:04  liongis  阅读(2614)  评论(7编辑  收藏  举报