stack3.h

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#pragma once

#include "GeomExport.h"
#include "maxheap.h"
#include "matrix3.h"

#define STACK_DEPTH     32      // default stack depth

class Matrix3Stack: public MaxHeapOperators {
public:
    GEOMEXPORT Matrix3Stack();
    GEOMEXPORT Matrix3Stack(int depth);
    GEOMEXPORT ~Matrix3Stack();

    BOOL        replace(const Matrix3 &m)
                    { stk[index] = m; return TRUE; }
    BOOL        push(const Matrix3 &m)
                    { stk[index++] = m; return index < maxDepth; }
    BOOL        dup(void)
                    { stk[index+1] = stk[index]; return ++index < maxDepth; }
    BOOL        concat(const Matrix3 &m)
                    { stk[index] = m * stk[index]; return TRUE; }
    Matrix3 &   get(void)
                    { return stk[index]; }
    Matrix3 &   pop(void)
                    { return stk[index--]; }
    BOOL        remove(void)
                    { return --index >= 0; }
    BOOL        reset(void)
                    { index = 0; stk[0].IdentityMatrix(); return TRUE; }

private:
    int         maxDepth;
    int         index;
    Matrix3 *   stk;
};