chromium/third_party/s2cellid/src/s2/s2coords.cc

// Copyright 2005 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.
//

// Author: [email protected] (Eric Veach)

#include "s2/s2coords.h"

#include "s2/util/bits/bits.h"

namespace S2 {

namespace internal {

// Define the "extern" constants in s2coords-internal.h.

static_assert …;

// kIJtoPos[orientation][ij] -> pos
int const kIJtoPos[4][4] = …;

// kPosToIJ[orientation][pos] -> ij
int const kPosToIJ[4][4] = …;

// kPosToOrientation[pos] -> orientation_modifier
int const kPosToOrientation[4] = …;

int const kFaceUVWFaces[6][3][2] = …;

double const kFaceUVWAxes[6][3][3] = …;

}  // namespace internal

S2Point FaceXYZtoUVW(int face, S2Point const& p) { … }

int XYZtoFaceSiTi(S2Point const& p,
                  int* face,
                  unsigned int* si,
                  unsigned int* ti) { … }

S2Point FaceSiTitoXYZ(int face, unsigned int si, unsigned int ti) { … }

}  // namespace S2