func HaversinesF64(
aLatitudes, aLongitudes, bLatitudes, bLongitudes, results []float64,
)Each latitude slice matches its longitude slice, and results holds len(aLatitudes) * len(bLatitudes) entries.
The Go package also exposes Haversine and Vincenty helpers, from every point of one set to every point of another. Inputs are in radians. Outputs are written into caller-owned slices, one row of distances per point of the first set.
package main
import (
"fmt"
nk "github.com/ashvardanian/NumKong/golang"
)
func main() {
// Statue of Liberty (40.6892°N, 74.0445°W) → Big Ben (51.5007°N, 0.1246°W)
libertyLatitudes := []float64{0.7101605100}
libertyLongitudes := []float64{-1.2923203180}
bigBenLatitudes := []float64{0.8988567821}
bigBenLongitudes := []float64{-0.0021746802}
distances := make([]float64, 1)
nk.VincentysF64(libertyLatitudes, libertyLongitudes, bigBenLatitudes, bigBenLongitudes, distances) // ≈ 5,589,857 m on WGS-84
nk.HaversinesF64(libertyLatitudes, libertyLongitudes, bigBenLatitudes, bigBenLongitudes, distances) // ≈ 5,574,848 m on the mean sphere
fmt.Println(distances[0])
}The output slice is caller-owned. That keeps allocation behavior explicit and predictable.
API
Functions
HaversinesF64HaversinesF64 writes the great-circle distance in meters from each a point to each b point, with float64 coordinates in radians, into results, row-major with len(bLatitudes) columns.
VincentysF64VincentysF64 writes the ellipsoidal geodesic distance in meters from each a point to each b point, with float64 coordinates in radians, into results, row-major with len(bLatitudes) columns.
func VincentysF64(
aLatitudes, aLongitudes, bLatitudes, bLongitudes, results []float64,
)Each latitude slice matches its longitude slice, and results holds len(aLatitudes) * len(bLatitudes) entries.