constants.h

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/*
 * Copyright 2016-2017 Uber Technologies, Inc.
 *
 * 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.
 */
#ifndef CONSTANTS_H
#define CONSTANTS_H

#ifndef M_PI

#define M_PI 3.14159265358979323846
#endif

#ifndef M_PI_2

#define M_PI_2 1.5707963267948966
#endif

#define M_2PI 6.28318530717958647692528676655900576839433

#define M_PI_180 0.0174532925199432957692369076848861271111

#define M_180_PI 57.29577951308232087679815481410517033240547

#define EPSILON 0.0000000000000001

#define M_SQRT3_2 0.8660254037844386467637231707529361834714

#define M_SIN60 M_SQRT3_2

#define M_AP7_ROT_RADS 0.333473172251832115336090755351601070065900389

#define M_SIN_AP7_ROT 0.3273268353539885718950318

#define M_COS_AP7_ROT 0.9449111825230680680167902

#define EARTH_RADIUS_KM 6371.007180918475

#define RES0_U_GNOMONIC 0.38196601125010500003

#define MAX_H3_RES 15

#define NUM_ICOSA_FACES 20

#define NUM_BASE_CELLS 122

#define NUM_HEX_VERTS 6

#define NUM_PENT_VERTS 5

#define NUM_PENTAGONS 12

#define H3_HEXAGON_MODE 1
#define H3_UNIEDGE_MODE 2
#define H3_EDGE_MODE 3
#define H3_VERTEX_MODE 4

#endif