CWE-ou-minkata/Sources/Tools/MaxConvert/plDistTree.h

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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it under the terms of the GNU General Public License as published by
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combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
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*==LICENSE==*/

#ifndef plDistTree_inc
#define plDistTree_inc

class plDistNode
{
public:
    enum {
        kIsLeaf = 0x1
    };
    uint32_t      fFlags;

    int32_t       fChildren[8];
    Box3        fBox;
    Box3        fFade;

    union
    {
        void*       fPData;
        uint32_t      fIData;
    };

    const Box3& GetBox() const { return fBox; }

    BOOL        IsLeaf() const { return 0 != (fFlags & kIsLeaf); }
    void        SetIsLeaf(BOOL on) { if(on)fFlags |= kIsLeaf; else fFlags &= ~kIsLeaf; }
};

class plDistTree
{
protected:
    
    int32_t                           fRoot;

    hsLargeArray<plDistNode>        fNodes;

    int32_t   IAddNodeRecur(int32_t iNode, const Box3& box, const Box3& fade, uint32_t iData);

    int32_t   IMergeNodes(int32_t iNode, const Box3& box, const Box3& fade, uint32_t iData);
    int32_t   INextNode(const Box3& box, const Box3& fade, uint32_t iData);

    int32_t   IGetChild(const Box3& parent, const Box3& child) const;

    inline BOOL IBoxesClear(const Box3& box0, const Box3& box1) const;
    inline BOOL IFadesClear(const Box3& fade0, const Box3& fade1) const;

    BOOL    IBox0ContainsBox1(const Box3& box0, const Box3& box1, const Box3& fade0, const Box3& fade1) const;

    BOOL    IBoxClearRecur(int32_t iNode, const Box3& box, const Box3& fade) const;
    BOOL    IPointClearRecur(int32_t iNode, const Point3& pt, const Box3& fade) const;

    void    IHarvestBoxRecur(int32_t iNode, const Box3& box, Tab<int32_t>& out) const;

public:
    plDistTree();
    virtual ~plDistTree();

    void Reset();

    void AddBoxPData(const Box3& box, const Box3& fade, void* pData=nil) { AddBoxIData(box, fade, uint32_t(pData)); }
    void AddBoxIData(const Box3& box, const Box3& fade, uint32_t iData=0);
    void AddBox(const Box3& box, const Box3& fade=NonFade()) { AddBoxIData(box, fade, 0); }

    BOOL BoxClear(const Box3& box, const Box3& fade) const;
    BOOL PointClear(const Point3& pt, const Box3& fade) const;

    BOOL IsEmpty() const { return fRoot < 0; }

    static Box3 NonFade() { return Box3(Point3(0,0,0), Point3(0,0,0)); }

    void HarvestBox(const Box3& box, Tab<int32_t>& out) const;

    const plDistNode& GetBox(int32_t i) const { return fNodes[i]; }
};

#endif // plDistTree_inc