/usr/lib/grass74/include/grass/interpf.h is in grass-dev 7.4.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* modified by Brown in June 1999 - added elatt & smatt
* modified by Mitasova Nov. 9, 1999 - added parameter for dtens to output2d
*/
#include <grass/config.h>
#include <stdio.h>
#include <grass/gis.h>
#include <grass/raster.h>
#include <grass/vector.h>
#include <grass/bitmap.h>
#include <grass/dataquad.h>
#include <grass/qtree.h>
#include <grass/dbmi.h>
/* for resample program */
struct fcell_triple
{
double x;
double y;
FCELL z;
double smooth;
};
#ifdef POINT2D_C
struct line_pnts *Pnts;
struct line_cats *Cats2;
dbDriver *driver2;
dbString sql2;
struct Map_info Map2;
struct field_info *ff;
int count;
#else
extern struct line_pnts *Pnts;
extern struct line_cats *Cats2;
extern dbDriver *driver2;
extern dbString sql2;
extern struct Map_info Map2;
extern struct field_info *ff;
extern int count;
#endif
struct interp_params;
typedef int grid_calc_fn(
struct interp_params *, struct quaddata *, struct BM *,
double, double, double *, double *, double *, double *,
double *, double *, double *, double *, double *,
double *, off_t, double);
typedef int matrix_create_fn(
struct interp_params *, struct triple *, int, double **, int *);
typedef int check_points_fn(
struct interp_params *, struct quaddata *, double *,
double *, double, double, struct triple);
typedef int secpar_fn(
struct interp_params *, int, int, int, struct BM *,
double *, double *, double *, double *, double *,
double *, int, int);
typedef double interp_fn(double, double);
typedef int interpder_fn(double, double, double *, double *);
typedef int wr_temp_fn(struct interp_params *, int, int, off_t);
struct interp_params
{
double zmult; /**< multiplier for z-values */
FILE *fdinp; /**< input stream */
int elatt; /**< which floating point attr to use? first = 1, second = 2, etc */
int smatt; /**< which floating point attr to use for smoothing? first = 1, second = 2, etc */
int kmin; /**< min number of points per segment for interpolation */
int kmax; /**< max number of points per segment */
char *maskmap; /**< name of mask */
int nsizr, nsizc; /**< number of rows and columns */
DCELL *az, *adx, *ady,
*adxx, *adyy, *adxy; /**< array for interpolated values */
double fi; /**< tension */
int KMAX2; /**< max num. of points for interp. */
int scik1, scik2, scik3; /**< multipliers for interp. values */
double rsm; /**< smoothing */
char *elev, *slope, *aspect,
*pcurv, *tcurv, *mcurv; /**< output files */
double dmin; /**< min distance between points */
double x_orig, y_orig; /**< origin */
int deriv, cv; /**< 1 if compute partial derivs */
double theta; /**< anisotropy angle, 0=East,counter-clockwise */
double scalex; /**< anisotropy scaling factor */
struct TimeStamp *ts; /**< timestamp for raster files */
FILE *Tmp_fd_z, *Tmp_fd_dx,
*Tmp_fd_dy, *Tmp_fd_xx,
*Tmp_fd_yy, *Tmp_fd_xy; /**< temp files for writing interp. values */
FILE *fddevi; /**< pointer to deviations file */
grid_calc_fn *grid_calc; /**< calculates grid for given segm */
matrix_create_fn *matrix_create; /**< creates matrix for a given segm */
check_points_fn *check_points; /**< checks interp. func. at points */
secpar_fn *secpar; /**< calculates aspect,slope,curv. */
interp_fn *interp; /**< radial based interp. function */
interpder_fn *interpder; /**< interp. func. for derivatives */
wr_temp_fn *wr_temp; /**< writes temp files */
const char *wheresql; /**< SQL statement to select input points */
};
/* distance.c */
double IL_dist_square(double *, double *, int);
/* func2d.c */
double IL_crst(double, double);
int IL_crstg(double, double, double *, double *);
/* init2d.c */
void IL_init_params_2d(struct interp_params *, FILE *, int, int, double,
int, int, char *, int, int,
DCELL *, DCELL *, DCELL *, DCELL *, DCELL *, DCELL *,
double, int, int, int, int, double,
char *, char *, char *, char *, char *, char *,
double, double, double, int, double, double,
FILE *, FILE *, FILE *, FILE *, FILE *, FILE *, FILE *,
struct TimeStamp *, int, const char *);
void IL_init_func_2d(struct interp_params *, grid_calc_fn *,
matrix_create_fn *, check_points_fn *, secpar_fn *,
interp_fn *, interpder_fn *, wr_temp_fn *);
/* input2d.c */
int IL_input_data_2d(struct interp_params *, struct tree_info *, double *,
double *, double *, double *, double *, double *, int *);
struct BM *IL_create_bitmask(struct interp_params *);
int translate_quad(struct multtree *, double, double, double, int);
/* interp2d.c */
int IL_grid_calc_2d(struct interp_params *, struct quaddata *, struct BM *,
double, double, double *, double *, double *, double *,
double *, double *, double *, double *, double *,
double *, off_t, double);
/* matrix.c */
int IL_matrix_create(struct interp_params *, struct triple *, int, double **,
int *);
int IL_matrix_create_alloc(struct interp_params *, struct triple *, int, double **,
int *, double *);
/* minmax.c */
int min1(int, int);
int max1(int, int);
double amax1(double, double);
double amin1(double, double);
/* newsegm2d.c */
int IL_interp_segments_new_2d(struct interp_params *, struct tree_info *,
struct multtree *, struct BM *, double, double,
double *, double *, double *, double *,
double *, double *, double *, double *,
double *, int, int, double);
/* output2d.c */
int IL_output_2d(struct interp_params *, struct Cell_head *, double, double,
double, double, double, double, double, double, double,
double, double, char *, double, int, int, int);
/* point2d.c */
int IL_check_at_points_2d(struct interp_params *, struct quaddata *, double *,
double *, double, double, struct triple);
/* resout2d.c */
/* resout2dmod.c */
int IL_resample_output_2d(struct interp_params *, double, double, double,
double, double, double, double, double, double,
double, double, char *, double *,
struct Cell_head *, struct Cell_head *, char *,
int);
/* ressegm2d.c */
int IL_resample_interp_segments_2d(struct interp_params *, struct BM *,
double, double, double *, double *,
double *, double *, double *, double *,
double *, double *, double *, off_t,
double *, int, int, int, int, int, double,
double, double, double, int);
/* secpar2d.c */
int IL_secpar_loop_2d(struct interp_params *, int, int, int, struct BM *,
double *, double *, double *, double *, double *,
double *, int, int);
/* segmen2d.c */
double smallest_segment(struct multtree *, int);
int IL_interp_segments_2d(struct interp_params *, struct tree_info *,
struct multtree *, struct BM *, double, double,
double *, double *, double *, double *, double *,
double *, double *, double *, double *, int, off_t,
double);
/* segmen2d_parallel.c */
int IL_interp_segments_2d_parallel(struct interp_params *, struct tree_info *,
struct multtree *, struct BM *, double, double,
double *, double *, double *, double *, double *,
double *, double *, double *, double *, int, off_t,
double, int);
/* vinput2d.c */
int IL_vector_input_data_2d(struct interp_params *, struct Map_info *, int,
char *, char *, struct tree_info *, double *,
double *, double *, double *, double *, double *,
int *, double *);
int process_point(double, double, double, double, struct tree_info *, double,
double *, double *, double *, double *, double *, double *,
int *, int *, int *);
/* write2d.c */
int IL_write_temp_2d(struct interp_params *, int, int, off_t);
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