SphericalTriangleMesh.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"
 
namespace CeresEngine::MeshGenerator {
 
    class SphericalTriangleMesh {
    public:
        class Triangles {
        public:
            [[nodiscard]] bool done() const noexcept;
 
            [[nodiscard]] Triangle generate() const;
 
            void next();
 
        private:
            const SphericalTriangleMesh* mMesh;
            int row_;
            int col_;
            int i_;
 
            Triangles(const SphericalTriangleMesh& mesh);
 
            friend class SphericalTriangleMesh;
        };
 
        class Vertices {
        public:
            [[nodiscard]] bool done() const noexcept;
 
            [[nodiscard]] MeshVertex generate() const;
 
            void next();
 
        private:
            const SphericalTriangleMesh* mMesh;
            int row_;
            int col_;
 
            Vertices(const SphericalTriangleMesh& mesh);
 
            friend class SphericalTriangleMesh;
        };
 
        SphericalTriangleMesh(double radius = 1.0, int segments = 4);
 
        SphericalTriangleMesh(const Vector3& v0, const Vector3& v1, const Vector3& v2, int segments = 4);
 
        [[nodiscard]] Triangles triangles() const noexcept;
 
        [[nodiscard]] Vertices vertices() const noexcept;
 
    private:
        Vector3 v0_, v1_, v2_;
 
        Vector3 normal_;
 
        int mSegments;
    };
 
} // namespace CeresEngine::MeshGenerator