vmatrix.h

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#ifndef _VMATRIX_H_
#define _VMATRIX_H_
 
#define MAT2(mat, dx, dy) \
    int dx_##mat = dx;    \
    int dy_##mat = dy
 
#define RAT2(mat, x, y) \
    &VAT2(mat, x, y)
 
#define VAT2(mat, x, y) \
    mat[(y - 1) * dx_##mat + (x - 1)]
 
 
 
#define MAT3(mat, dx, dy, dz) \
    int dx_##mat = dx;        \
    int dy_##mat = dy;        \
    int dz_##mat = dz
 
#define RAT3(mat, x, y, z) \
    &VAT3(mat, x, y, z)
 
#define VAT3(mat, x, y, z) \
    mat[(z - 1) * dy_##mat * dx_##mat + \
        (y - 1) * dx_##mat + \
        (x - 1)]
 
#endif /* _VMATRIX_H_ */