Utility.hpp

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//
//  CeresEngine - A game development framework
//
//  Created by Rogiel Sulzbach.
//  Copyright (c) 2018-2022 Rogiel Sulzbach. All rights reserved.
//
 
#pragma once
 
#include <utility>
 
namespace CeresEngine::MeshGenerator {
 
    template<typename Generator> class GeneratedType {
    public:
        using Type = decltype(std::declval<const Generator*>()->generate());
    };
 
    template<typename Primitive> class EdgeGeneratorType {
    public:
        using Type = decltype(std::declval<const Primitive*>()->edges());
    };
 
    template<typename Primitive> class TriangleGeneratorType {
    public:
        using Type = decltype(std::declval<const Primitive*>()->triangles());
    };
 
    template<typename Primitive> class VertexGeneratorType {
    public:
        using Type = decltype(std::declval<const Primitive*>()->vertices());
    };
 
    template<typename Generator> int count(const Generator& generator) noexcept {
        Generator temp{generator};
        int c = 0;
        while(!temp.done()) {
            ++c;
            temp.next();
        }
        return c;
    }
 
} // namespace CeresEngine::MeshGenerator