spot-light.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_SPOT_LIGHT_HPP
#define ANTKEEPER_SCENE_SPOT_LIGHT_HPP
 
#include <engine/scene/light.hpp>
#include <engine/math/numbers.hpp>
#include <engine/math/vector.hpp>
 
namespace scene {
 
class spot_light: public light
{
public:
    [[nodiscard]] inline light_type get_light_type() const noexcept override
    {
        return light_type::spot;
    }
    
    inline void set_luminous_flux(const math::fvec3& luminous_flux) noexcept
    {
        m_luminous_flux = luminous_flux;
    }
    
    [[nodiscard]] inline const math::fvec3& get_luminous_flux() const noexcept
    {
        return m_luminous_flux;
    }
    
    void set_cutoff(const math::fvec2& cutoff);
    
    [[nodiscard]] inline const math::fvec3& get_direction() const noexcept
    {
        return m_direction;
    }
    
    [[nodiscard]] inline const math::fvec2& get_cutoff() const noexcept
    {
        return m_cutoff;
    }
    
    [[nodiscard]] inline const math::fvec2& get_cosine_cutoff() const noexcept
    {
        return m_cosine_cutoff;
    }
 
private:
    void transformed() override;
    
    math::fvec3 m_luminous_flux{0.0f, 0.0f, 0.0f};
    math::fvec3 m_direction{0.0f, 0.0f, -1.0f};
    math::fvec2 m_cutoff{math::pi<float>, math::pi<float>};
    math::fvec2 m_cosine_cutoff{-1.0f, -1.0f};
};
 
} // namespace scene
 
#endif // ANTKEEPER_SCENE_SPOT_LIGHT_HPP