Provided by: libncarg-dev_6.3.0-6build1_amd64
c_nngetslopes - retrieve the slope at a specified coordinate.
void c_nngetslopes(int, int, float *, int *);
c_nngetslopes (row, column, slope, ier);
row A subscript indexing the first dimensioned variable in the 2D grid array returned from the most recent call to c_natgrids. column A subscript indexing the second dimensioned variable in the 2D grid array returned from the most recent call to c_natgrids. slope *slope is the slope at the grid point z[i,j], where z is the output grid in the most recent call to c_natgrids. ier An error value. If *ier is 0, then no errors were detected. If *ier is non- zero, then refer to the man page for natgrid_errors for details.
This routine allows you to retrieve the current value of Natgrid parameters. For a complete list of parameters available in this utility, see the natgrid_params man page.
To use c_nngetslopes, load the NCAR Graphics library ngmath.
natgrid, natgrid_params, c_nngetaspects. Complete documentation for Natgrid is available at URL http://ngwww.ucar.edu/ngdoc/ng/ngmath/natgrid/nnhome.html
Copyright (C) 2000 University Corporation for Atmospheric Research The use of this Software is governed by a License Agreement.