forked from mirrors/gotosocial
30 lines
1.3 KiB
Go
30 lines
1.3 KiB
Go
|
// 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 is a library for working with geometry in S² (spherical geometry).
|
|||
|
|
|
|||
|
|
Its related packages, parallel to this one, are s1 (operates on S¹), r1 (operates on ℝ¹),
|
|||
|
|
r2 (operates on ℝ²) and r3 (operates on ℝ³).
|
|||
|
|
|
|||
|
|
This package provides types and functions for the S2 cell hierarchy and coordinate systems.
|
|||
|
|
The S2 cell hierarchy is a hierarchical decomposition of the surface of a unit sphere (S²)
|
|||
|
|
into ``cells''; it is highly efficient, scales from continental size to under 1 cm²
|
|||
|
|
and preserves spatial locality (nearby cells have close IDs).
|
|||
|
|
|
|||
|
|
More information including an in-depth introduction to S2 can be found on the
|
|||
|
|
S2 website https://s2geometry.io/
|
|||
|
|
*/
|
|||
|
|
package s2
|