/usr/include/osgEarth/TileKey is in libosgearth-dev 2.9.0+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 | /* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2016 Pelican Mapping
* http://osgearth.org
*
* osgEarth is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#ifndef OSGEARTH_TILE_KEY_H
#define OSGEARTH_TILE_KEY_H 1
#include <osgEarth/Common>
#include <osgEarth/Profile>
#include <osg/ref_ptr>
#include <osg/Version>
#include <string>
namespace osgEarth
{
/**
* Uniquely identifies a single tile on the map, relative to a Profile.
* Profiles have an origin of 0,0 at the top left.
*/
class OSGEARTH_EXPORT TileKey
{
public:
/**
* Constructs an invalid TileKey.
*/
TileKey() : _lod(0), _x(0), _y(0) { }
/**
* Creates a new TileKey with the given tile xy at the specified level of detail
*
* @param lod
* The level of detail (subdivision recursion level) of the tile
* @param tile_x
* The x index of the tile
* @param tile_y
* The y index of the tile
* @param profile
* The profile for the tile
*/
TileKey(
unsigned int lod,
unsigned int tile_x,
unsigned int tile_y,
const Profile* profile );
/** Copy constructor. */
TileKey( const TileKey& rhs );
/** dtor */
virtual ~TileKey() { }
/** Compare two tilekeys for equality. */
bool operator == (const TileKey& rhs) const {
return
valid() && rhs.valid() &&
_lod==rhs._lod && _x==rhs._x && _y==rhs._y &&
_profile->isHorizEquivalentTo(rhs._profile.get());
}
/** Compare two tilekeys for inequality */
bool operator != (const TileKey& rhs) const {
return !(*this == rhs);
}
/** Sorts tilekeys, ignoring profiles */
bool operator < (const TileKey& rhs) const {
if (_lod < rhs._lod) return true;
if (_lod > rhs._lod) return false;
if (_x < rhs._x) return true;
if (_x > rhs._x) return false;
return _y < rhs._y;
}
/**
* Canonical invalid tile key.
*/
static TileKey INVALID;
/**
* Gets the string representation of the key, formatted like:
* "lod_x_y"
*/
const std::string& str() const { return _key; }
/**
* Gets the profile within which this key is interpreted.
*/
const osgEarth::Profile* getProfile() const;
/**
* Whether this is a valid key.
*/
bool valid() const { return _profile.valid(); }
/**
* Get the quadrant relative to this key's parent.
*/
unsigned getQuadrant() const;
public:
/**
* Gets a reference to the child key of this key in the specified
* quadrant (0, 1, 2, or 3).
*/
TileKey createChildKey( unsigned int quadrant ) const;
/**
* Creates and returns a key that represents the parent tile of this key.
*/
TileKey createParentKey() const;
/**
* Creates and returns a key that represents an ancestor tile corresponding to
* the specified LOD.
*/
TileKey createAncestorKey( int ancestorLod ) const;
/**
* Creates a key that represents this tile's neighbor at the same LOD. Wraps
* around in X and Y automatically. For example, xoffset=-1 yoffset=1 will
* give you the key for the tile SW of this tile.
*/
TileKey createNeighborKey( int xoffset, int yoffset ) const;
/**
* Gets the level of detail of the tile represented by this key.
*/
unsigned getLevelOfDetail() const { return _lod; }
unsigned getLOD() const { return _lod; }
/**
* Gets the geospatial extents of the tile represented by this key.
*/
const GeoExtent& getExtent() const {
return _extent; }
/**
* Gets the extents of this key's tile, in pixels
*/
void getPixelExtents(
unsigned int& out_minx,
unsigned int& out_miny,
unsigned int& out_maxx,
unsigned int& out_maxy,
const unsigned int& tile_size) const;
/**
* Gets the X and Y indexes of this tile at its level of detail.
*/
void getTileXY(
unsigned int& out_tile_x,
unsigned int& out_tile_y) const;
unsigned int getTileX() const { return _x; }
unsigned int getTileY() const { return _y; }
/**
* Maps this tile key to another tile key in order to account in
* a resolution difference. For example: we are requesting data for
* a TileKey at LOD 4, at a tile size of 32. The source data's tile
* size if 256. That means the source data at LOD 1 will contain the
* data necessary to build the tile.
*
* usage: TileKey tk = mapResolution(31, 256);
*
* We want a 31x31 tile. The source data is 256x256. This will return
* a TileKey that access the appropriate source data, which we will then
* need to crop to populate our tile.
*
* You can set "minimumLOD" if you don't want a key below a certain LOD.
*/
TileKey mapResolution(
unsigned targetSize,
unsigned sourceDataSize,
unsigned minimumLOD =0) const;
protected:
std::string _key;
unsigned int _lod;
unsigned int _x;
unsigned int _y;
osg::ref_ptr<const Profile> _profile;
GeoExtent _extent;
};
}
#endif // OSGEARTH_TILE_KEY_H
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