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MRVertex.h

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/*
    File:       MRVertex.h

    Function:   

    Author:     Andrew Willmott, originally from code by Michael Garland,
                but a lot's changed since then =).

    Copyright:  (c) 1997-2000, Andrew Willmott
*/

#ifndef __MRVertex__
#define __MRVertex__

#include "gcl/Geometry.h"
#include "gcl/Colour.h"
#include "cl/Flags.h"
#include "cl/NArray.h"

class MRModel;
class MRVertex;
class MRCodes;

struct FaceIdx
{
    Int     v[3];
};

typedef NArray<FaceIdx> FaceIdxArray;
typedef NArray<MRVertex> MRVertexes;
typedef NArray<MRCodes> MRCodesList;
typedef NArray<UInt32> TreeCodes;
typedef NArray<Flags8> MRFlagsList;

enum MRV_Flags
{
    MRV_Active      = 0x0001,   
    MRV_Inside      = 0x0002,   
    MRV_FaceActive  = 0x0004,   
    MRV_End
};

class MRVertex
{
public:
    MRVertex();

    Bool        IsLeaf()    { return(child[0] < 0); }
    Bool        IsRoot()    { return(parent < 0); }

    Void        SetContraction(
                    MRVertexes      &vertices,
                    Int             iv,
                    MRFlagsList     &flags,
                    Int             child0, 
                    Int             child1,
                    Int             face0,
                    Int             face1,
                    GCLReal         err
                );

    Bool        CanContract(Int iv, MRFlagsList &flags);
    Bool        CanExpand(Int iv, MRFlagsList &flags);

    Void        Contract(Int iv, MRFlagsList &flags);
    Void        Expand(Int iv, MRFlagsList &flags);

    Void        PrintID();

    Void        PullProps(MRVertexes &vertices);
                // pull face properties up the vertex tree.
    
    // fields
    
    Int         parent;         
    Int         child[2];       
    Int         face[2];        

    Byte        level;          
    Vector      areaNormal;     
};

class MRCodes
{
public:
    MRCodes();

    Void        AdjustVertices(MRVertexes &vertices, MRFlagsList &flags,
                    Int faceIndexes[3], Int leafIndexes[3]);

                // set properties of face.

    // fields
    UInt32      treeCode[3];
};


Void MRSetupHierarchy(
        MRVertexes      &vertices, 
        Int             iv,
        TreeCodes       &treeCodes,
        Int             &height,
        Int             level,
        Int             treeCode
    );

#endif

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