GU/GU_TrimCells.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * Produced by:
 *      Jeff Lait
 *      Side Effects
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        GU library (C++)
 *
 * COMMENTS:    Tracks state of cells of trimmed patches .
 *
 */

#ifndef __GU_TrimCells_h__
#define __GU_TrimCells_h__

#include "GU_API.h"

class GU_API GU_TrimCells
{
public:
    GU_TrimCells(int udiv, int vdiv);
    ~GU_TrimCells();

    void        addCurve(int i, int j) 
                          { if (i >= 0 && i < myVDiv && j >= 0 && j < myUDiv)
                                myCellStates[i*myUDiv + j] = 1; }
    char        &operator()(int i, int j)
                          { return myCellStates[i*myUDiv + j]; }
    char        operator()(int i, int j) const 
                          { return myCellStates[i*myUDiv + j]; }
    char        *operator()(int i) const
                          { return &myCellStates[i*myUDiv]; }

    // Returns runlength of cell at i,j.
    int         runLength(int i, int j) const;

    // Do 4 directional fill from i/j replacing with state state. 
    // 0 elements are considered empty.
    void        fill(int i, int j, char state);

private:
    int          myUDiv, myVDiv;
    char        *myCellStates;
};

#endif

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