Transvoxel.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 "CeresEngine/Mesh/Forward.hpp"
 
#include "CeresEngine/DataTypes.hpp"
 
#include "CeresEngine/Foundation/Container/Array.hpp"
#include "CeresEngine/Foundation/Container/Vector.hpp"
 
#include "CeresEngine/Math/Vector.hpp"
 
namespace CeresEngine {
 
    class Transvoxel {
    private:
    public:
        static MeshPtr voxelize(Int32 x, Int32 y, Int32 z);
 
    private:
        struct RegularCellData {
            UInt8 geometryCounts; // High nibble is vertex count, low nibble is triangle count.
            UInt8 vertexIndex[15]; // Groups of 3 indexes giving the triangulation.
 
            [[nodiscard]] long getVertexCount(void) const { return (geometryCounts >> 4); }
            [[nodiscard]] long getTriangleCount(void) const { return (geometryCounts & 0x0F); }
        };
 
        struct TransitionCellData {
            UInt64 geometryCounts; // High nibble is vertex count, low nibble is triangle count.
            UInt8 vertexIndex[36]; // Groups of 3 indexes giving the triangulation.
 
            [[nodiscard]] UInt32 getVertexCount(void) const { return UInt32(geometryCounts >> 4); }
            [[nodiscard]] UInt32 getTriangleCount(void) const { return UInt32(geometryCounts & 0x0F); }
        };
 
        static const UInt8 regularCellClass[256];
 
        static const RegularCellData regularCellData[16];
 
        static const Array<UInt16, 12> regularVertexData[256];
 
        static const UInt8 transitionCellClass [[maybe_unused]][512];
 
        static const TransitionCellData transitionCellData [[maybe_unused]][56];
 
        static const UInt8 transitionCornerData [[maybe_unused]][13];
 
        static const UInt16 transitionVertexData [[maybe_unused]][512][12];
    };
 
} // namespace CeresEngine