Function cvPtr3D

deps/opencv/modules/core/src/array.cpp:1838–1869

Returns pointer to specified element of 3d array

// Returns pointer to specified element of 3d array
CV_IMPL  uchar*
cvPtr3D( const CvArr* arr, int z, int y, int x, int* _type )
{
    uchar* ptr = 0;
    if( CV_IS_MATND( arr ))
    {
        CvMatND* mat = (CvMatND*)arr;

        if( mat->dims != 3 ||
            (unsigned)z >= (unsigned)(mat->dim[0].size) ||
            (unsigned)y >= (unsigned)(mat->dim[1].size) ||
            (unsigned)x >= (unsigned)(mat->dim[2].size) )
            CV_Error( CV_StsOutOfRange, "index is out of range" );

        ptr = mat->data.ptr + (size_t)z*mat->dim[0].step +
              (size_t)y*mat->dim[1].step + x*mat->dim[2].step;

        if( _type )
            *_type = CV_MAT_TYPE(mat->type);
    }
    else if( CV_IS_SPARSE_MAT( arr ))
    {
        int idx[] = { z, y, x };
        ptr = icvGetNodePtr( (CvSparseMat*)arr, idx, _type, 1, 0 );
    }
    else
    {
        CV_Error( CV_StsBadArg, "unrecognized or unsupported array type" );
    }

    return ptr;
}


// Returns pointer to specified element of n-d array