github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/pkg/geo/geogfn/geographiclib.go (about)

     1  // Copyright 2020 The Cockroach Authors.
     2  //
     3  // Use of this software is governed by the Business Source License
     4  // included in the file licenses/BSL.txt.
     5  //
     6  // As of the Change Date specified in that file, in accordance with
     7  // the Business Source License, use of this software will be governed
     8  // by the Apache License, Version 2.0, included in the file
     9  // licenses/APL.txt.
    10  
    11  package geogfn
    12  
    13  import (
    14  	"github.com/cockroachdb/cockroach/pkg/geo/geographiclib"
    15  	"github.com/golang/geo/s2"
    16  )
    17  
    18  // spheroidDistance returns the s12 (meter) component of spheroid.Inverse from s2 Points.
    19  func spheroidDistance(s geographiclib.Spheroid, a s2.Point, b s2.Point) float64 {
    20  	inv, _, _ := s.Inverse(s2.LatLngFromPoint(a), s2.LatLngFromPoint(b))
    21  	return inv
    22  }