ConvexPolygonMesh.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/Math/Math.hpp"
 
#include "CeresEngine/Foundation/Container/Vector.hpp"
 
namespace CeresEngine::MeshGenerator {
 
    class ConvexPolygonMesh {
    private:
        class Triangles {
        public:
            [[nodiscard]] bool done() const noexcept;
            [[nodiscard]] Triangle generate() const;
            void next();
 
        private:
            const ConvexPolygonMesh* mMesh;
            bool mOdd;
            int mSegmentIndex;
            int mSideIndex;
            int mRingIndex;
 
            explicit Triangles(const ConvexPolygonMesh&) noexcept;
 
            friend class ConvexPolygonMesh;
        };
 
        class Vertices {
        public:
            [[nodiscard]] bool done() const noexcept;
            [[nodiscard]] MeshVertex generate() const;
            void next();
 
        private:
            const ConvexPolygonMesh* mMesh;
            bool mCenterDone;
            int mSegmentIndex;
            int mSideIndex;
            int mRingIndex;
 
            explicit Vertices(const ConvexPolygonMesh&) noexcept;
 
            friend class ConvexPolygonMesh;
        };
 
        Vector<Vector3> mVertices;
        int mSegments;
        int mRings;
        Vector3 mCenter;
        Vector3 mNormal;
        Vector3 mTangent;
        Vector3 mBitangent;
        Vector2 mTexDelta;
 
    public:
        explicit ConvexPolygonMesh(double radius = 1.0, int sides = 5, int segments = 4, int rings = 4) noexcept;
 
        explicit ConvexPolygonMesh(const Vector<Vector2>& vertices, int segments = 1, int rings = 1) noexcept;
 
        explicit ConvexPolygonMesh(Vector<Vector3> vertices, int segments = 1, int rings = 1) noexcept;
 
        [[nodiscard]] Triangles triangles() const noexcept;
        [[nodiscard]] Vertices vertices() const noexcept;
    };
 
} // namespace CeresEngine::MeshGenerator