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102 lines
4.6 KiB
C++
102 lines
4.6 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___GRIDGEOMETRY___H__
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#define __OPENSPACE_MODULE_GLOBEBROWSING___GRIDGEOMETRY___H__
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#include <modules/globebrowsing/meshes/trianglesoup.h>
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#include <ghoul/glm.h>
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#include <memory>
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#include <vector>
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namespace openspace::globebrowsing {
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/**
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* Abstract class defining an interface used for geometries with grid structures.
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* The class <code>Grid</code> should be extended for use of geometries with a 2D
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* structure where the number of segments in x and y direction represents the number
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* of vertices + 1 in each direction.
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*/
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class Grid {
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public:
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Grid(int xSegments, int ySegments);
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virtual ~Grid() = default;
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TriangleSoup& geometry();
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/**
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* Returns the number of grid cells in the x direction. Hence the number of vertices
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* in the x direction is xResolution + 1.
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*/
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virtual int xSegments() const = 0;
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/**
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* Returns the number of grid cells in the y direction. Hence the number of vertices
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* in the y direction is xResolution + 1.
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*/
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virtual int ySegments() const = 0;
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protected:
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/**
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* Should return the indices of vertices for a grid with size <code>xSegments</code> *
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* <code>ySegments</code>. Where the number of vertices in each direction is the number
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* of segments + 1.
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*/
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virtual std::vector<GLuint> createElements(int xSegments, int ySegments) = 0;
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/**
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* Should return the positions of vertices for a grid with size <code>xSegments</code>
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* * <code>ySegments</code>. Where the number of vertices in each direction is the
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* number of segments + 1.
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*/
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virtual std::vector<glm::vec4> createPositions(int xSegments, int ySegments) = 0;
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/**
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* Should return the texture coordinates of vertices for a grid with size
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* <code>xSegments</code> * <code>ySegments</code>. Where the number of vertices in
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* each direction is the number of segments + 1.
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*/
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virtual std::vector<glm::vec2>
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createTextureCoordinates(int xSegments, int ySegments) = 0;
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/**
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* Should return the normals of vertices for a grid with size <code>xSegments</code> *
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* <code>ySegments</code>. Where the number of vertices in each direction is the number
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* of segments + 1.
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*/
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virtual std::vector<glm::vec3> createNormals(int xSegments, int ySegments) = 0;
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std::unique_ptr<TriangleSoup> _geometry;
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const int _xSegments;
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const int _ySegments;
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};
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} // namespace openspace::globebrowsing
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#endif // __OPENSPACE_MODULE_GLOBEBROWSING___GRIDGEOMETRY___H__
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