OpenSpace/modules/base/rendering/pointcloud/renderablepolygoncloud.h

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 * OpenSpace                                                                             *
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#ifndef __OPENSPACE_MODULE_BASE___RENDERABLEPOLYGONCLOUD___H__
#define __OPENSPACE_MODULE_BASE___RENDERABLEPOLYGONCLOUD___H__

#include <modules/base/rendering/pointcloud/renderablepointcloud.h>

#include <ghoul/opengl/ghoul_gl.h>

namespace ghoul::opengl { class Texture; }

namespace openspace {

namespace documentation { struct Documentation; }

/**
 * A billboarded point cloud, but with dynamically created uniform polygon shapes instead
 * of a custom texture. Overwrites the sprite set in parent class, RenderablePointCloud
 */
class RenderablePolygonCloud : public RenderablePointCloud {
public:
    explicit RenderablePolygonCloud(const ghoul::Dictionary& dictionary);
    ~RenderablePolygonCloud() override = default;

    void initializeGL() override;
    void deinitializeGL() override;

    static documentation::Documentation Documentation();

private:
    void createPolygonTexture();
    void renderToTexture(GLuint textureToRenderTo, GLuint textureWidth,
        GLuint textureHeight);
    void renderPolygonGeometry(GLuint vao);

    void bindTextureForRendering() const override;

    int _nPolygonSides = 3;

    GLuint _pTexture = 0;

    GLuint _polygonVao = 0;
    GLuint _polygonVbo = 0;
};

} // namespace openspace

#endif // __OPENSPACE_MODULE_BASE___RENDERABLEPOLYGONCLOUD___H__