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101 lines
3.8 KiB
C++
101 lines
3.8 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2016 *
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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 __GEOMETRY_H__
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#define __GEOMETRY_H__
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#include <ghoul/opengl/ghoul_gl.h>
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#include <ghoul/logging/logmanager.h>
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#include <glm/glm.hpp>
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#include <vector>
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namespace openspace {
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/// Class to hold vertex data and handling OpenGL interfacing and rendering. A Geometry
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/// has all data needed such as position buffer and normal buffer but all data is not
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/// necessarily needed for all purpouses so the Geometry can disable use of normals for
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/// example.
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// TODO : Possibly render triangle strips in this class instead of triangles since
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// that is faster
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class Geometry
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{
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public:
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enum class Positions { Yes, No };
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enum class TextureCoordinates { Yes, No };
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enum class Normals { Yes, No };
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Geometry(
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std::vector<unsigned int> elements, // At least elements are required
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Positions usePositions = Positions::No,
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TextureCoordinates useTextures = TextureCoordinates::No,
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Normals useNormals = Normals::No);
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~Geometry();
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// Setters
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void setVertexPositions(std::vector<glm::vec4> positions);
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void setVertexTextureCoordinates(std::vector<glm::vec2> textures);
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void setVertexNormals(std::vector<glm::vec3> normals);
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void setElements(std::vector<unsigned int> elements);
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void drawUsingActiveProgram();
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protected:
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// Determines what attribute data is in use
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bool _useVertexPositions;
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bool _useTextureCoordinates;
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bool _useVertexNormals;
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typedef struct {
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public:
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GLfloat position[4];
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GLfloat texture[2];
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GLfloat normal[3];
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private:
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GLubyte padding[28]; // Pads the struct out to 64 bytes for performance increase
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} Vertex;
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// Vertex data
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std::vector<Vertex> _vertexData;
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std::vector<GLuint> _elementData;
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private:
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bool updateDataInGPU();
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// GL handles
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GLuint _vaoID;
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GLuint _vertexBufferID;
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GLuint _elementBufferID;
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bool _gpuDataNeedUpdate;
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};
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} // namespace openspace
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#endif // __GEOMETRY_H__
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