regioncover_example.go

package main

import (
	"fmt"
	"github.com/golang/geo/s2"
)

func main() {
	
	// Definition of LatLng slice
	latlngs := []s2.LatLng{s2.LatLngFromDegrees(-33.0, 143.0),
						   s2.LatLngFromDegrees(-33.0, 151.0),
						   s2.LatLngFromDegrees(-27.0, 147.0)}
	
	// Polyline
	pline := s2.PolylineFromLatLngs(latlngs)

	rc := &s2.RegionCoverer{MaxLevel: 5, MaxCells: 4}
	cells := rc.CellUnion(pline)
	fmt.Println("Cells:", cells)


	// Loop
	points := []s2.Point{s2.PointFromLatLng(latlngs[0]), s2.PointFromLatLng(latlngs[1]), s2.PointFromLatLng(latlngs[2])}
	loop := s2.LoopFromPoints(points)

	rc = &s2.RegionCoverer{MaxLevel: 5, MaxCells: 4}
	cells = rc.CellUnion(loop)
	fmt.Println("Cells:", cells)
}