light-probe.hpp

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/*
 * Copyright (C) 2023  Christopher J. Howard
 *
 * This file is part of Antkeeper source code.
 *
 * Antkeeper source code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Antkeeper source code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Antkeeper source code.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef ANTKEEPER_SCENE_LIGHT_PROBE_HPP
#define ANTKEEPER_SCENE_LIGHT_PROBE_HPP
 
#include <engine/scene/object.hpp>
#include <engine/gl/texture.hpp>
#include <engine/gl/framebuffer.hpp>
#include <engine/math/matrix.hpp>
#include <memory>
#include <span>
#include <vector>
 
namespace scene {
 
class light_probe: public object<light_probe>
{
public:
    light_probe();
    
    void update_illuminance_matrices();
    
    void set_luminance_texture(std::shared_ptr<gl::texture_cube> texture);
    
    void set_luminance_outdated(bool outdated);
    
    void set_illuminance_outdated(bool outdated);
    
    [[nodiscard]] inline const std::shared_ptr<gl::texture_cube>& get_luminance_texture() const noexcept
    {
        return m_luminance_texture;
    }
    
    [[nodiscard]] inline const std::vector<std::shared_ptr<gl::framebuffer>>& get_luminance_framebuffers() const noexcept
    {
        return m_luminance_framebuffers;
    }
    
    [[nodiscard]] inline const std::shared_ptr<gl::texture_1d>& get_illuminance_texture() const noexcept
    {
        return m_illuminance_texture;
    }
    
    [[nodiscard]] inline const std::shared_ptr<gl::framebuffer>& get_illuminance_framebuffer() const noexcept
    {
        return m_illuminance_framebuffer;
    }
    
    [[nodiscard]] inline std::span<const math::fmat4, 3> get_illuminance_matrices() const noexcept
    {
        return m_illuminance_matrices;
    }
    
    [[nodiscard]] inline bool is_luminance_outdated() const noexcept
    {
        return m_luminance_outdated;
    }
    
    [[nodiscard]] inline bool is_illuminance_outdated() const noexcept
    {
        return m_illuminance_outdated;
    }
    
    [[nodiscard]] inline const aabb_type& get_bounds() const noexcept override
    {
        return m_bounds;
    }
    
private:
    void transformed() override;
    aabb_type m_bounds{};
    std::shared_ptr<gl::texture_cube> m_luminance_texture;
    std::vector<std::shared_ptr<gl::framebuffer>> m_luminance_framebuffers;
    std::shared_ptr<gl::texture_1d> m_illuminance_texture;
    std::shared_ptr<gl::framebuffer> m_illuminance_framebuffer;
    math::fmat4 m_illuminance_matrices[3];
    bool m_luminance_outdated{};
    bool m_illuminance_outdated{};
};
 
} // namespace scene
 
#endif // ANTKEEPER_SCENE_LIGHT_PROBE_HPP