// This file adds a new circle overlay to GMaps2
// it is really a many-pointed polygon, but look smooth enough to be a circle.
var CircleOverlay = function(latLng, radius, strokeColor, strokeWidth, strokeOpacity, fillColor, fillOpacity) {
	this.latLng = latLng;	
	this.radius = radius;	
	this.strokeColor = strokeColor;	
	this.strokeWidth = strokeWidth;	
	this.strokeOpacity = strokeOpacity;	
	this.fillColor = fillColor;	
	this.fillOpacity = fillOpacity;
	}
	// Implements GOverlay interface
	CircleOverlay.prototype = GOverlay;CircleOverlay.prototype.initialize = function(map) {	
	this.map = map;
	}
	CircleOverlay.prototype.clear = function() {	if(this.polygon != null && this.map != null) {		this.map.removeOverlay(this.polygon);	}}
	// Calculate all the points and draw them
	CircleOverlay.prototype.redraw = function(force) {	
	var d2r = Math.PI / 180;	
	circleLatLngs = new Array();	
	var circleLat = this.radius * 0.014483;  
	// Convert statute miles into degrees latitude	
	var circleLng = circleLat / Math.cos(this.latLng.lat() * d2r);	
	var numPoints = 40;		// 2PI = 360 degrees, +1 so that the end points meet	
	for (var i = 0; i < numPoints + 1; i++) { 		
	var theta = Math.PI * (i / (numPoints / 2)); 		
	var vertexLat = this.latLng.lat() + (circleLat * Math.sin(theta)); 		
	var vertexLng = this.latLng.lng() + (circleLng * Math.cos(theta));		
	var vertextLatLng = new GLatLng(vertexLat, vertexLng);		
	circleLatLngs.push(vertextLatLng); 	
	}		
	this.clear();	
	this.polygon = new GPolygon(circleLatLngs, this.strokeColor, this.strokeWidth, this.strokeOpacity, this.fillColor, this.fillOpacity);
	this.map.addOverlay(this.polygon);}
	CircleOverlay.prototype.remove = function() {	
	this.clear();}
	CircleOverlay.prototype.containsLatLng = function(latLng) {	// Polygon Point in poly 	
	if(this.polygon.containsLatLng) {		return this.polygon.containsLatLng(latLng);	}}
	CircleOverlay.prototype.setRadius = function(radius) {	this.radius = radius;}
	CircleOverlay.prototype.setLatLng = function(latLng) {	this.latLng = latLng;}