metaforce/DataSpec/DNACommon/AROTBuilder.hpp

#pragma once

#include "DNACommon.hpp"
#include "DeafBabe.hpp"
#include "zeus/CAABox.hpp"
#include "CMDL.hpp"
#include <set>

namespace DataSpec
{
namespace DNAMP1
{
struct PATH;
}

struct AROTBuilder
{
    using ColMesh = hecl::blender::ColMesh;

    struct BitmapPool
    {
        std::vector<std::set<int>> m_pool;
        size_t addIndices(const std::set<int>& indices);
    } bmpPool;

    struct Node
    {
        std::vector<Node> childNodes;
        std::set<int> childIndices;
        size_t poolIdx = 0;
        uint16_t flags = 0;
        uint16_t compSubdivs = 0;

        size_t nodeOff = 0;
        size_t nodeSz = 4;

        void addChild(int level, int minChildren, const std::vector<zeus::CAABox>& triBoxes,
                      const zeus::CAABox& curAABB, BspNodeType& typeOut);
        void mergeSets(int a, int b);
        bool compareSets(int a, int b) const;
        void nodeCount(size_t& sz, size_t& idxRefs, BitmapPool& bmpPool, size_t& curOff);
        void writeIndirectionTable(athena::io::MemoryWriter& w);
        void writeNodes(athena::io::MemoryWriter& w, int nodeIdx);
        void advanceIndex(int& nodeIdx);

        void colSize(size_t& totalSz);
        void writeColNodes(uint8_t*& ptr, const zeus::CAABox& curAABB);

        void pathCountNodesAndLookups(size_t& nodeCount, size_t& lookupCount);
        void pathWrite(DNAMP1::PATH& path, const zeus::CAABox& curAABB);
    } rootNode;

    void build(std::vector<std::vector<uint8_t>>& secs, const zeus::CAABox& fullAabb,
               const std::vector<zeus::CAABox>& meshAabbs, const std::vector<DNACMDL::Mesh>& meshes);
    std::pair<std::unique_ptr<uint8_t[]>, uint32_t> buildCol(const ColMesh& mesh, BspNodeType& rootOut);
    void buildPath(DNAMP1::PATH& path);
};

}