86 lines
2.1 KiB
Plaintext
86 lines
2.1 KiB
Plaintext
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/* -*-c++-*- */
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/* osgEarth - Geospatial SDK for OpenSceneGraph
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* Copyright 2020 Pelican Mapping
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* http://osgearth.org
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*
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* osgEarth is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#ifndef OSGEARTH_GEOCOMMON_H
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#define OSGEARTH_GEOCOMMON_H 1
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// For FLT_MAX
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#include <limits.h>
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#include <cfloat>
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#undef NO_DATA_VALUE
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#define NO_DATA_VALUE -FLT_MAX
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namespace osgEarth
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{
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// constexpr float NO_DATA_VALUE = -FLT_MAX;
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/**
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* Types of interpolation between two geodetic locations.
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*/
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enum GeoInterpolation
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{
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GEOINTERP_GREAT_CIRCLE,
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GEOINTERP_RHUMB_LINE
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};
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/**
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* Elevation/Image grid interpolation methods.
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*/
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enum RasterInterpolation
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{
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INTERP_AVERAGE,
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INTERP_NEAREST,
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INTERP_BILINEAR,
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INTERP_TRIANGULATE,
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INTERP_CUBIC,
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INTERP_CUBICSPLINE
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};
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/**
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* Elevation stack sampling policy
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*/
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enum ElevationSamplePolicy
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{
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SAMPLE_FIRST_VALID,
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SAMPLE_HIGHEST,
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SAMPLE_LOWEST,
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SAMPLE_AVERAGE
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};
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/**
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* Elevation NO_DATA treatment policy
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*/
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enum ElevationNoDataPolicy
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{
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NODATA_INTERPOLATE, // interpolate across NO_DATA samples
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NODATA_MSL // rewrite NO_DATA samples as MSL
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};
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/**
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* Indicates how to interpret a Z coordinate.
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*/
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enum AltitudeMode
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{
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ALTMODE_ABSOLUTE, // Z value is the absolute height above MSL/HAE.
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ALTMODE_RELATIVE // Z value is the height above the terrain elevation.
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};
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}
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#endif // OSGEARTH_GEODATA_H
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