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Convenience initializer for TerrainNode #64

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Convenience initializer for TerrainNode #64

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16 changes: 16 additions & 0 deletions MapboxSceneKit/TerrainNode.swift
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Expand Up @@ -79,6 +79,22 @@ open class TerrainNode: SCNNode {
self.init(southWestCorner: CLLocation(latitude: minLat, longitude: minLon),
northEastCorner: CLLocation(latitude: maxLat, longitude: maxLon))
}

@objc public convenience init(lat: CLLocationDegrees, lon: CLLocationDegrees, distanceInKm: Double ) {
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@hyerra hyerra Oct 12, 2018

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Would it be better to maybe have the center coordinate as a CLLocation rather than having it as latitude and longitude?


// https://coderwall.com/p/otkscg/geographic-searches-within-a-certain-distances
// Generates approximately accurate bounding box around a center latitude longitude point.
let earthRadius: Double = 6371

let maxLat: Double = lat + Math.radiansToDegrees(distanceInKm / earthRadius)
let minLat: Double = lat - Math.radiansToDegrees(distanceInKm / earthRadius)

let maxLon: Double = lon + Math.radiansToDegrees(distanceInKm / earthRadius / cos(Math.degreesToRadians(lat)))
let minLon: Double = lon - Math.radiansToDegrees(distanceInKm / earthRadius / cos(Math.degreesToRadians(lat)))

self.init(southWestCorner: CLLocation(latitude: minLat, longitude: minLon),
northEastCorner: CLLocation(latitude: maxLat, longitude: maxLon))
}

deinit {
for task in pendingFetches {
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