1 files changed, 50 insertions, 0 deletions
diff --git a/vendor/github.com/golang/geo/s2/region.go b/vendor/github.com/golang/geo/s2/region.go
new file mode 100644
index 0000000..f1e127e
--- /dev/null
+++ b/vendor/github.com/golang/geo/s2/region.go
@@ -0,0 +1,50 @@
+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package s2
+
+// A Region represents a two-dimensional region on the unit sphere.
+//
+// The purpose of this interface is to allow complex regions to be
+// approximated as simpler regions. The interface is restricted to methods
+// that are useful for computing approximations.
+type Region interface {
+	// CapBound returns a bounding spherical cap. This is not guaranteed to be exact.
+	CapBound() Cap
+
+	// RectBound returns a bounding latitude-longitude rectangle that contains
+	// the region. The bounds are not guaranteed to be tight.
+	RectBound() Rect
+
+	// ContainsCell reports whether the region completely contains the given region.
+	// It returns false if containment could not be determined.
+	ContainsCell(c Cell) bool
+
+	// IntersectsCell reports whether the region intersects the given cell or
+	// if intersection could not be determined. It returns false if the region
+	// does not intersect.
+	IntersectsCell(c Cell) bool
+}
+
+// Enforce interface satisfaction.
+var (
+	_ Region = Cap{}
+	_ Region = Cell{}
+	_ Region = (*CellUnion)(nil)
+	//_ Region = (*Polygon)(nil)
+	_ Region = Polyline{}
+	_ Region = Rect{}
+)