ParametricMesh.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 "MeshVertex.hpp"
#include "Triangle.hpp"
 
#include "CeresEngine/Foundation/Function.hpp"
 
namespace CeresEngine::MeshGenerator {
 
    class ParametricMesh {
    public:
        class Triangles {
        public:
            [[nodiscard]] Triangle generate() const;
            [[nodiscard]] bool done() const noexcept;
            void next();
 
        private:
            Triangles(const ParametricMesh& mesh);
 
            const ParametricMesh* mMesh;
            Vector2i i_;
            bool even_;
 
            friend class ParametricMesh;
        };
 
        class Vertices {
        public:
            [[nodiscard]] MeshVertex generate() const;
            [[nodiscard]] bool done() const noexcept;
            void next();
 
        private:
            Vertices(const ParametricMesh& mesh);
 
            const ParametricMesh* mMesh;
 
            Vector2i i_;
 
            friend class ParametricMesh;
        };
 
        explicit ParametricMesh(Function<MeshVertex(const Vector2& t) const> eval, const Vector2i& segments = {16, 16}) noexcept;
 
        [[nodiscard]] Triangles triangles() const noexcept;
 
        [[nodiscard]] Vertices vertices() const noexcept;
 
    private:
        Function<MeshVertex(const Vector2& t) const> mEval;
 
        Vector2i mSegments;
 
        Vector2 mDelta;
    };
 
} // namespace CeresEngine::MeshGenerator