private void timer1_Tick(object sender, EventArgs e)
{
using (BleDBContext db = new BleDBContext())
{
Bitmap bitmap = drawBaseImage();
Graphics g = Graphics.FromImage(bitmap);
foreach (BleBeacon beacon in db.BleBeacons)
{
List <BleLastLocation> locations = db.LastLocations.Where(l => l.BleBeaconsId == beacon.BleBeaconsId).ToList();
BleLastLocation location = locations.OrderByDescending(l => l.Date).FirstOrDefault();
if (location != null)
{
drawCircle(g, Pens.Black, Brushes.Black, (float)coordinateWithOffset(location.X), (float)coordinateWithOffset(location.Y), 3);
//g.DrawEllipse(Pens.Black, (float)((location.X * 100 + 24) - 3), (float)((location.Y * 100 + 24) - 3), 3 + 3, 3 + 3);
//g.FillEllipse(Brushes.Black, (float)((location.X * 100 + 24) - 3), (float)((location.Y * 100 + 24) - 3), 3 + 3, 3 + 3);
g.DrawString(beacon.Name, DefaultFont, Brushes.Black, (float)(location.X * metersToPixels + (extraBorder + 9)), (float)(location.Y * metersToPixels + (extraBorder - 11)));
}
}
pictureBox1.Image = bitmap;
}
}
private void locationCalculation()
{
while (!shouldStop)
{
Dictionary <string, Dictionary <BleNode, double> > copyOfDistances = CopyOfDistances;
foreach (string mac in copyOfDistances.Keys)
{
List <BleNode> nodeList = new List <BleNode>();
List <double> distList = new List <double>();
/*
* PointF a = new PointF();
* PointF b = new PointF();
* PointF c = new PointF();
*
* float dA = 0;
* float dB = 0;
* float dC = 0;
*/
lock (distances[mac])
{
int i = 0;
foreach (BleNode node in distances[mac].Keys)
{
if (i++ > 2)
{
break;
}
nodeList.Add(node);
distList.Add(distances[mac][node]);
}
}
if (nodeList.Count == 3 && distList.Count == 3)
{
/*
* a = new PointF((float)nodeList[0].X, (float)nodeList[0].Y);
* b = new PointF((float)nodeList[1].X, (float)nodeList[1].Y);
* c = new PointF((float)nodeList[2].X, (float)nodeList[2].Y);
*
* dA = (float)distList[0];
* dB = (float)distList[1];
* dC = (float)distList[2];
*/
//Vector2 vector = GetLocation(nodeList, distList);
Vector2 vector = trilaterate2DLinear(nodeList, distList);
//PointF point = GetLocationWithCenterOfGravity(a, b, c, dA, dB, dC);
Location location = new Location();
location.X = vector.X;
location.Y = vector.Y;
//location.X = point.X;
//location.Y = point.Y;
location.Date = DateTime.Now;
BleBeacon beacon = beacons.Find(bea => bea.MacAddress == mac);
if (beacon != null)
{
location.BleBeaconsId = beacon.BleBeaconsId;
/*
* using (BleBeaconServerContext db = new BleBeaconServerContext())
* {
* foreach (BleNode node in nodeList)
* {
* bool foundDistance = false;
* foreach (BleDistance distance in db.Distances)
* {
* if (distance.BleBeaconsId == beacon.BleBeaconsId && distance.BleNodesId == node.BleNodesId)
* {
* distance.Distance = distList[nodeList.IndexOf(node)];
* foundDistance = true;
* break;
* }
* }
*
* if (!foundDistance)
* {
* BleDistance distance = new BleDistance();
* distance.BleBeaconsId = beacon.BleBeaconsId;
* distance.BleNodesId = node.BleNodesId;
* distance.Distance = distList[nodeList.IndexOf(node)];
* db.Distances.Add(distance);
* }
* }
*
* db.SaveChanges();
* }*/
using (BleBeaconServerContext db = new BleBeaconServerContext())
{
bool lastLocationFound = false;
foreach (BleLastLocation bleLastLocation in db.LastLocations)
{
if (bleLastLocation.BleBeaconsId == beacon.BleBeaconsId)
{
bleLastLocation.Date = location.Date;
bleLastLocation.X = location.X;
bleLastLocation.Y = location.Y;
lastLocationFound = true;
break;
}
}
if (!lastLocationFound)
{
BleLastLocation lastLocation = new BleLastLocation();
lastLocation.BleBeaconsId = beacon.BleBeaconsId;
lastLocation.Date = location.Date;
lastLocation.X = location.X;
lastLocation.Y = location.Y;
db.LastLocations.Add(lastLocation);
}
//Saving location history data to database
if (!lastLocations.ContainsKey(beacon) || lastLocations[beacon] <= DateTime.Now.AddHours(-1))
{
if (!lastLocations.ContainsKey(beacon))
{
lastLocations.Add(beacon, location.Date);
}
else
{
lastLocations[beacon] = location.Date;
}
db.Locations.Add(location);
}
db.SaveChanges();
}
lock (locations)
{
if (locations.ContainsKey(mac))
{
locations[mac] = location;
}
else
{
locations.Add(mac, location);
}
}
}
}
}
Thread.Sleep(1000);
}
}