AnyShape.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 "AnyGenerator.hpp"
#include "Edge.hpp"
#include "ShapeVertex.hpp"
 
#include "CeresEngine/Foundation/SmartPtr.hpp"
 
namespace CeresEngine::MeshGenerator {
 
    class AnyShape {
    public:
        template<typename Shape> AnyShape(Shape shape) : mBase{new Derived<Shape>{std::move(shape)}} {}
 
        AnyShape(const AnyShape& that);
 
        AnyShape(AnyShape&&) = default;
 
        AnyShape& operator=(const AnyShape& that);
 
        AnyShape& operator=(AnyShape&&) = default;
 
        AnyGenerator<Edge> edges() const noexcept;
 
        AnyGenerator<ShapeVertex> vertices() const noexcept;
 
    private:
        class Base {
        public:
            virtual ~Base();
            virtual UPtr<Base> clone() const = 0;
            virtual AnyGenerator<Edge> edges() const = 0;
            virtual AnyGenerator<ShapeVertex> vertices() const = 0;
        };
 
        template<typename Shape> class Derived : public Base {
        public:
            Derived(Shape shape) : mShape(std::move(shape)) {}
 
            virtual UPtr<Base> clone() const override { return UPtr<Base>{new Derived{mShape}}; }
 
            virtual AnyGenerator<Edge> edges() const override { return mShape.edges(); }
 
            virtual AnyGenerator<ShapeVertex> vertices() const override { return mShape.vertices(); }
 
            Shape mShape;
        };
 
        UPtr<Base> mBase;
    };
 
} // namespace CeresEngine::MeshGenerator