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6dc738e54e
* Make GlobeRotation and GlobeTranslation work for non-globes and move them to the base module * Move ellipsoid and geodetic classes into the core * Allow more things to take scene graph nodes instead of RenderableGlobes * Move goToGeo and related Lua functions into the core * Move more functions from the pathnavigation namespace into the navigation namespace --------- Co-authored-by: Emma Broman <emma.broman@liu.se>
120 lines
5.1 KiB
C++
120 lines
5.1 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2025 *
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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_CORE___ELLIPSOID___H__
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#define __OPENSPACE_CORE___ELLIPSOID___H__
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#include <ghoul/glm.h>
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#include <vector>
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namespace openspace {
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struct Geodetic2;
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struct Geodetic3;
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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 based
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* 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 z-axis
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* points towards the north pole. For other globes than earth of course the radii can
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* differ.
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*/
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class Ellipsoid {
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public:
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/**
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* Shadow configuration structure.
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*/
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struct ShadowConfiguration {
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std::pair<std::string, double> source;
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std::pair<std::string, double> caster;
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};
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/**
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* \param radii defines three radii for the Ellipsoid
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*/
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explicit Ellipsoid(glm::dvec3 radii = glm::dvec3(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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*
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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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*
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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(
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const glm::dvec3& p) const;
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glm::dvec3 geodeticSurfaceNormal(const Geodetic2& geodetic2) const;
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const glm::dvec3& radii() const;
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double minimumRadius() const;
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double maximumRadius() 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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void setShadowConfigurationArray(
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std::vector<Ellipsoid::ShadowConfiguration> shadowConfArray
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);
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const std::vector<Ellipsoid::ShadowConfiguration>& shadowConfigurationArray() const;
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private:
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struct EllipsoidCache {
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glm::dvec3 radiiSquared = glm::dvec3(0.0);
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glm::dvec3 oneOverRadiiSquared = glm::dvec3(0.0);
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glm::dvec3 radiiToTheFourth = glm::dvec3(0.0);
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double minimumRadius = 0.0;
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double maximumRadius = 0.0;
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} _cached;
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void updateInternalCache();
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glm::dvec3 _radii = glm::dvec3(0.0);
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// Eclipse shadows conf
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std::vector<Ellipsoid::ShadowConfiguration> _shadowConfArray;
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};
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} // namespace openspace
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#endif // __OPENSPACE_CORE___ELLIPSOID___H__
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