async Task <bool> CalculateRoute()
{
buttonGrid.IsVisible = false;
map.Polylines.Clear();
RouteReset();
var line1 = new Xamarin.Forms.GoogleMaps.Polyline();
var line2 = new Xamarin.Forms.GoogleMaps.Polyline();
fastest = new Xamarin.Forms.GoogleMaps.Polyline();
cleanest = new Xamarin.Forms.GoogleMaps.Polyline();
fastest.StrokeColor = Color.Blue;
fastest.StrokeWidth = 7;
cleanest.StrokeColor = Color.FromHex("00e36f");
cleanest.StrokeWidth = 4;
line1.StrokeColor = Color.Blue;
line1.StrokeWidth = 7;
line2.StrokeColor = Color.FromHex("00e36f");
line2.StrokeWidth = 4;
string originParam = originPos.Latitude.ToString() + ',' + originPos.Longitude.ToString();
string destinationParam = destinationPos.Latitude.ToString() + ',' + destinationPos.Longitude.ToString();
line1.Positions.Clear();
line2.Positions.Clear();
fastest.Positions.Clear();
cleanest.Positions.Clear();
maxTime = 0;
fastestDistance = 0;
cleanestDistance = 0;
fastestPollution = 0;
cleanestTime = 0;
maxPollution = 0;
if (!string.IsNullOrEmpty(originParam) && !string.IsNullOrEmpty(destinationParam) && isHomeSet > 0 && isDestinationSet > 0)
{
Bounds bounds = new Bounds(originPos, destinationPos);
map.MoveToRegion(MapSpan.FromBounds(bounds));
blueDistanceLabel.Text = "";
magentaDistanceLabel.Text = "";
await GetHeatMap(bounds);
var mqResult = await rest.GetMQAlternativeDirection(originParam, destinationParam, mqModes[mode]);
List <Position> pollutionPoints = new List <Position>();
bool isRouteChosen = false;
if (mqResult != null)
{
if (mqResult.route != null)
{
if (mqResult.route.shape != null)
{
fastest.Positions.Clear();
cleanest.Positions.Clear();
if (!string.IsNullOrEmpty(mqResult.route.shape.shapePoints))
{
var points = DecodePolyline(mqResult.route.shape.shapePoints);
foreach (var point in points)
{
fastest.Positions.Add(point);
cleanest.Positions.Add(point);
pollutionPoints.Add(point);
}
maxPollution = await CalculatePollution(pollutionPoints, true);
fastestPollution = maxPollution;
maxTime = mqResult.route.time;
cleanestTime = mqResult.route.time;
fastestDistance = mqResult.route.distance;
cleanestDistance = mqResult.route.distance;
}
}
}
MQDirection fastestRoute = new MQDirection();
MQDirection cleanestRoute = new MQDirection();
if (mqResult.route.alternateRoutes != null)
{
if (mqResult.route.alternateRoutes.Count > 0)
{
bool duplicated = false;
map.Polylines.Clear();
fastestRoute = mqResult.route.alternateRoutes[0];
cleanestRoute = mqResult.route.alternateRoutes[0];
foreach (var item in mqResult.route.alternateRoutes)
{
line1.Positions.Clear();
line2.Positions.Clear();
pollutionPoints.Clear();
if (item.route.shape != null)
{
if (!string.IsNullOrEmpty(item.route.shape.shapePoints))
{
var points = DecodePolyline(item.route.shape.shapePoints);
foreach (var point in points)
{
line1.Positions.Add(point);
line2.Positions.Add(point);
pollutionPoints.Add(point);
if (point.Latitude.Equals(hotspot.Latitude) && point.Longitude.Equals(hotspot.Longitude))
{
duplicated = true;
break;
}
}
if (!duplicated)
{
float pollutionValue = await CalculatePollution(pollutionPoints, true);
if (item.route.time < maxTime)
{
fastest = line1;
fastestRoute = item;
maxTime = item.route.time;
fastestPollution = pollutionValue;
fastestDistance = item.route.distance;
isRouteChosen = true;
}
else if (pollutionValue < maxPollution)
{
cleanest = line2;
cleanestRoute = item;
maxPollution = pollutionValue;
cleanestTime = item.route.time;
cleanestDistance = item.route.distance;
isRouteChosen = true;
}
}
}
}
}
if (isRouteChosen && fastestPollution > maxPollution)
{
map.Polylines.Clear();
if (fastest.Positions.Count >= 2)
{
map.Polylines.Add(fastest);
}
if (cleanest.Positions.Count >= 2)
{
map.Polylines.Add(cleanest);
}
blueDistanceLabel.Text = $"{fastestDistance.ToString("F1")} miles {timeToMin(maxTime)} Pollution: {(int)fastestPollution}";
magentaDistanceLabel.Text = $"{cleanestDistance.ToString("F1")} miles {timeToMin(cleanestTime)} Pollution: {(int)maxPollution}";
buttonGrid.IsVisible = true;
drawHotspot();
return(true);
}
}
}
buttonGrid.IsVisible = false;
map.Polylines.Clear();
Device.StartTimer(TimeSpan.FromMilliseconds(3000), () =>
{
if (fastest.Positions.Count >= 2)
{
fastest.StrokeColor = Color.FromHex("00e36f");
map.Polylines.Add(fastest);
}
magentaDistanceLabel.Text = $"{mqResult.route.distance.ToString("F1")} miles {timeToMin(mqResult.route.time)} Pollution: {(int)fastestPollution}";
blueDistanceLabel.BackgroundColor = Color.Gray;
blueDistanceLabel.Text = "No faster route available.";
drawHotspot();
return(false);
});
}
}
else
{
await DisplayAlert("Warning", "Please fill all the fields", "OK");
}
return(false);
}
async Task <bool> CalculateRoute()
{
map.Polylines.Clear();
var line1 = new Xamarin.Forms.GoogleMaps.Polyline();
line1.StrokeColor = Color.Blue;
line1.StrokeWidth = 7;
var line2 = new Xamarin.Forms.GoogleMaps.Polyline();
line2.StrokeColor = Color.Magenta;
line2.StrokeWidth = 4;
string originParam = originPos.Latitude.ToString() + ',' + originPos.Longitude.ToString();
string destinationParam = destinationPos.Latitude.ToString() + ',' + destinationPos.Longitude.ToString();
if (isHomeSet == 1)
{
originParam = origin;
}
if (isDestinationSet == 1)
{
destinationParam = destination;
}
Bounds bounds = new Bounds(originPos, destinationPos);
map.MoveToRegion(MapSpan.FromBounds(bounds));
if (!string.IsNullOrEmpty(originParam) && !string.IsNullOrEmpty(destinationParam) && isHomeSet > 0 && isDestinationSet > 0)
{
//var distanceResult = await rest.GetDistance(originParam, destinationParam, modes[mode]);
//if (distanceResult != null)
//{
// if (distanceResult.rows[0].elements[0].distance != null)
// {
// string distance = distanceResult.rows[0].elements[0].distance.text;
// string duration = distanceResult.rows[0].elements[0].duration.text;
// distanceLabel.Text = $"Red Distance={distance}, Duration={duration}";
// }
//}
//var result = await rest.GetDirection(originParam, destinationParam, modes[mode]);
//if (result != null)
//{
// var line = new Xamarin.Forms.GoogleMaps.Polyline();
// line.StrokeColor = Color.Red;
// line.StrokeWidth = 10;
// foreach (var route in result.routes)
// {
// foreach (var leg in route.legs)
// {
// foreach (var step in leg.steps)
// {
// var points = DecodePolyline(step.polyline.points);
// foreach (var point in points)
// {
// line.Positions.Add(point);
// }
// }
// }
// }
// if (line.Positions.Count >= 2)
// map.Polylines.Add(line);
//}
var mqResult = await rest.GetMQAlternativeDirection(originParam, destinationParam, mqModes[mode]);
List <Position> pollutionPoints = new List <Position>();
if (mqResult != null)
{
if (mqResult.route != null)
{
if (mqResult.route.shape != null)
{
if (!string.IsNullOrEmpty(mqResult.route.shape.shapePoints))
{
var points = DecodePolyline(mqResult.route.shape.shapePoints);
foreach (var point in points)
{
line1.Positions.Add(point);
pollutionPoints.Add(point);
}
if (line1.Positions.Count >= 2)
{
map.Polylines.Add(line1);
}
maxPollution = await CalculatePollution(pollutionPoints, true);
drawHotspot();
}
}
}
if (mqResult.route.alternateRoutes != null)
{
bool duplicated = false;
foreach (var item in mqResult.route.alternateRoutes)
{
line2.Positions.Clear();
pollutionPoints.Clear();
if (item.route.shape != null)
{
if (!string.IsNullOrEmpty(item.route.shape.shapePoints))
{
var points = DecodePolyline(item.route.shape.shapePoints);
foreach (var point in points)
{
line2.Positions.Add(point);
pollutionPoints.Add(point);
if (point.Latitude.Equals(hotspot.Latitude) && point.Longitude.Equals(hotspot.Longitude))
{
duplicated = true;
break;
}
}
if (!duplicated)
{
float pollutionValue = await CalculatePollution(pollutionPoints, true);
if (pollutionValue > maxPollution)
{
continue;
}
else
{
if (line2.Positions.Count >= 2)
{
map.Polylines.Add(line2);
}
drawHotspot();
return(true);
}
}
}
}
}
}
}
}
else
{
await this.DisplayAlert("Warning", "Please fill all the fields", "OK");
}
return(false);
}