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;
}

// Implementa a interface
CircleOverlay.prototype = new 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);
    }
}

CircleOverlay.prototype.getBounds = function() {
    return this.polygon.getBounds();
}

// Calcula todos os pontos e , apos isso, desenha o criculo
CircleOverlay.prototype.redraw = function(force) {
    var d2r = Math.PI / 180;
    circleLatLngs = new Array();
    var circleLat = this.radius * 0.00001;
    var circleLng = circleLat / Math.cos(this.latLng.lat() * d2r);
    var numPoints = 40;
   
    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) {
    if(this.polygon.containsLatLng) {
        return this.polygon.containsLatLng(latLng);
    }
}

CircleOverlay.prototype.setRadius = function(radius) {
    this.radius = radius;
}

CircleOverlay.prototype.getRadius = function() {
    return this.radius;
}


CircleOverlay.prototype.setLatLng = function(latLng) {
    this.latLng = latLng;
}