directional_light.h

/*****************************************************************************
 * VCLib                                                                     *
 * Visual Computing Library                                                  *
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 * Copyright(C) 2021-2025                                                    *
 * Visual Computing Lab                                                      *
 * ISTI - Italian National Research Council                                  *
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#ifndef VCL_RENDER_CONCEPTS_DIRECTIONAL_LIGHT_H
#define VCL_RENDER_CONCEPTS_DIRECTIONAL_LIGHT_H
 
#include <vclib/space/core.h>
 
namespace vcl {
 
template<typename T>
concept DirectionalLightConcept =
    requires (T&& obj, RemoveRef<T>::PointType p, vcl::Color c) {
        // types
        typename RemoveRef<T>::PointType;
 
        // constructors
        RemoveRef<T>();
        RemoveRef<T>(p, c);
 
        { obj.direction() } -> Point3Concept;
        { obj.color() } -> ColorConcept;
 
        // non const requirements
        requires IsConst<T> || requires {
            { obj.reset() } -> std::same_as<void>;
        };
    };
 
} // namespace vcl
 
#endif // VCL_RENDER_CONCEPTS_DIRECTIONAL_LIGHT_H