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Filter out far away positions on the node map

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This commit is contained in:
Garth Vander Houwen 2024-03-24 11:45:49 -07:00
parent 03a210e415
commit e9e886e5bc
1 changed files with 23 additions and 3 deletions
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26
Meshtastic/Extensions/CoreData/PositionEntityExtension.swift
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@ -14,13 +14,33 @@ extension PositionEntity {
static func allPositionsFetchRequest() -> NSFetchRequest<PositionEntity> {
let request: NSFetchRequest<PositionEntity> = PositionEntity.fetchRequest()
request.fetchLimit = 50
request.fetchLimit = 200
//request.fetchBatchSize = 1
//request.returnsObjectsAsFaults = true
request.returnsObjectsAsFaults = false
//request.includesSubentities = false
request.returnsDistinctResults = true
request.sortDescriptors = [NSSortDescriptor(key: "time", ascending: false)]
request.predicate = NSPredicate(format: "nodePosition != nil && latest == true && time >= %@", Calendar.current.date(byAdding: .day, value: -2, to: Date())! as NSDate)
let positionPredicate = NSPredicate(format: "nodePosition != nil && latest == true && time >= %@", Calendar.current.date(byAdding: .day, value: -2, to: Date())! as NSDate)
let pointOfInterest = LocationHelper.currentLocation
if pointOfInterest.latitude != LocationHelper.DefaultLocation.latitude && pointOfInterest.longitude != LocationHelper.DefaultLocation.longitude {
/// Lets just get nodes within about 500 miles
let D: Double = 800000 * 1.1
let R: Double = 6371009
let meanLatitidue = pointOfInterest.latitude * .pi / 180
let deltaLatitude = D / R * 180 / .pi
let deltaLongitude = D / (R * cos(meanLatitidue)) * 180 / .pi
let minLatitude: Double = pointOfInterest.latitude - deltaLatitude
let maxLatitude: Double = pointOfInterest.latitude + deltaLatitude
let minLongitude: Double = pointOfInterest.longitude - deltaLongitude
let maxLongitude: Double = pointOfInterest.longitude + deltaLongitude
let distancePredicate = NSPredicate(format: "(%lf <= (longitudeI / 1e7)) AND ((longitudeI / 1e7) <= %lf) AND (%lf <= (latitudeI / 1e7)) AND ((latitudeI / 1e7) <= %lf)", minLongitude, maxLongitude,minLatitude, maxLatitude)
request.predicate = NSCompoundPredicate(type: .and, subpredicates: [distancePredicate, positionPredicate])
} else {
request.predicate = positionPredicate
}
return request
}