fixed dependencies

vendor/github.com/paulmach/orb/planar/distance.go

@@ -0,0 +1,21 @@
+package planar
+
+import (
+	"math"
+
+	"github.com/paulmach/orb"
+)
+
+// Distance returns the distance between two points in 2d euclidean geometry.
+func Distance(p1, p2 orb.Point) float64 {
+	d0 := (p1[0] - p2[0])
+	d1 := (p1[1] - p2[1])
+	return math.Sqrt(d0*d0 + d1*d1)
+}
+
+// DistanceSquared returns the square of the distance between two points in 2d euclidean geometry.
+func DistanceSquared(p1, p2 orb.Point) float64 {
+	d0 := (p1[0] - p2[0])
+	d1 := (p1[1] - p2[1])
+	return d0*d0 + d1*d1
+}