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0d03177d43
* Initial restructuring of the Globebrowsing branch * Update Ghoul repository Fix include guards * More cleanup * Split texttileprovider subclasses into separate files * Move TileProviders into namespace * Convert static class methods into free functions * Splitting tile subclasses into their own files Remove `using namespace` from header file * Split TileDataSet subclass into separate file Update SGCT reference * Move shader preprocessing data into internal class * More Globebrowsing cleanup * More cleanup Remove unused Convexhull class
106 lines
4.8 KiB
C++
106 lines
4.8 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2017 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#ifndef __OPENSPACE_MODULE_GLOBEBROWSING___ELLIPSOID___H__
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#define __OPENSPACE_MODULE_GLOBEBROWSING___ELLIPSOID___H__
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#include <modules/globebrowsing/geometry/geodetic2.h>
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#include <modules/globebrowsing/geometry/geodetic3.h>
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#include <ghoul/glm.h>
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namespace openspace {
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namespace globebrowsing {
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/**
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* This class is based largely on the Ellipsoid class defined in the book
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* "3D Engine Design for Virtual Globes". Most planets or planetary objects are better
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* described using ellipsoids than spheres. All inputs and outputs to this class is
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* based on the WGS84 standard coordinate system where the x-axis points towards geographic
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* (lat = 0, lon = 0), the y-axis points towards (lat = 0, lon = 90deg) and the
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* z-axis points towards the north pole. For other globes than earth of course the radii
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* can differ.
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*/
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class Ellipsoid {
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public:
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/**
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* \param radii defines three radii for the Ellipsoid
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*/
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Ellipsoid(glm::dvec3 radii = glm::dvec3(1.0, 1.0, 1.0));
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/**
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* Scales a point along the geocentric normal and places it on the surface of the
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* Ellipsoid.
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* \param p is a point in the cartesian coordinate system to be placed on the surface
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* of the Ellipsoid
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*/
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glm::dvec3 geocentricSurfaceProjection(const glm::dvec3& p) const;
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/**
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* Scales a point along the geodetic normal and places it on the surface of the
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* Ellipsoid.
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* \param p is a point in the cartesian coordinate system to be placed on the surface
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* of the Ellipsoid
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*/
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glm::dvec3 geodeticSurfaceProjection(const glm::dvec3& p) const;
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glm::dvec3 geodeticSurfaceNormalForGeocentricallyProjectedPoint(const glm::dvec3& p) const;
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glm::dvec3 geodeticSurfaceNormal(Geodetic2 geodetic2) const;
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const glm::dvec3& radii() const;
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const glm::dvec3& radiiSquared() const;
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const glm::dvec3& oneOverRadiiSquared() const;
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const glm::dvec3& radiiToTheFourth() const;
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double minimumRadius() const;
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double maximumRadius() const;
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double averageRadius() const;
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double longitudalDistance(double lat, double lon1, double lon2) const;
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double greatCircleDistance(const Geodetic2& p1, const Geodetic2& p2) const;
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Geodetic2 cartesianToGeodetic2(const glm::dvec3& p) const;
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glm::dvec3 cartesianSurfacePosition(const Geodetic2& geodetic2) const;
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glm::dvec3 cartesianPosition(const Geodetic3& geodetic3) const;
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private:
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struct EllipsoidCache {
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glm::dvec3 _radiiSquared;
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glm::dvec3 _oneOverRadiiSquared;
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glm::dvec3 _radiiToTheFourth;
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double _minimumRadius;
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double _maximumRadius;
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double _medianRadius;
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} _cached;
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void updateInternalCache();
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glm::dvec3 _radii;
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};
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} // namespace globebrowsing
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} // namespace openspace
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#endif // __OPENSPACE_MODULE_GLOBEBROWSING___ELLIPSOID___H__
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