GRASS GIS 8 Programmer's Manual 8.3.2(2024)-exported
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gv.c File Reference

OGSF library - loading and manipulating vector sets (lower level functions) More...

#include <stdio.h>
#include <stdlib.h>
#include <grass/ogsf.h>
#include "gsget.h"
Include dependency graph for gv.c:

Go to the source code of this file.

Macros

#define FIRST_VECT_ID   20656
 

Functions

geovect * gv_get_vect (int id)
 Get vector set.
 
geovect * gv_get_prev_vect (int id)
 Get previous vector set.
 
int gv_num_vects (void)
 Get number of loaded vector sets.
 
geovect * gv_get_last_vect (void)
 Get last loaded vector set.
 
geovect * gv_get_new_vect (void)
 Allocate memory for new vector set.
 
void gv_update_drapesurfs (void)
 Update drape surfaces.
 
int gv_set_defaults (geovect *gv)
 Set attributes of vector set to default values.
 
int gv_init_vect (geovect *gv)
 Initialize geovect struct.
 
void gv_delete_vect (int id)
 Delete vector set (unload)
 
int gv_free_vect (geovect *fv)
 Free allocated memory for geovect struct.
 
void gv_free_vectmem (geovect *fv)
 Free allocated memory.
 
void gv_set_drapesurfs (geovect *gv, int *hsurfs, int nsurfs)
 Set drape surfaces for vector set.
 

Detailed Description

OGSF library - loading and manipulating vector sets (lower level functions)

(C) 1999-2008, 2011 by the GRASS Development Team

This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details.

Author
Bill Brown USACERL (November 1993)
Doxygenized by Martin Landa (June 2008)

Definition in file gv.c.

Macro Definition Documentation

◆ FIRST_VECT_ID

#define FIRST_VECT_ID   20656

Definition at line 22 of file gv.c.

Function Documentation

◆ gv_delete_vect()

void gv_delete_vect ( int  id)

Delete vector set (unload)

Parameters
idvector set id

Definition at line 242 of file gv.c.

References G_debug(), gv_free_vect(), and gv_get_vect().

Referenced by GV_delete_vector().

◆ gv_free_vect()

int gv_free_vect ( geovect *  fv)

Free allocated memory for geovect struct.

Parameters
fvpointer to geovect struct
Returns
-1 on failure
1 on success

Definition at line 265 of file gv.c.

References G_debug(), G_free(), gv_free_vectmem(), and NULL.

Referenced by gv_delete_vect().

◆ gv_free_vectmem()

void gv_free_vectmem ( geovect *  fv)

Free allocated memory.

Parameters
fvpointer to geovect struct

Definition at line 313 of file gv.c.

References G_free(), NULL, and sub_Vectmem().

Referenced by gv_free_vect(), and GV_load_vector().

◆ gv_get_last_vect()

geovect * gv_get_last_vect ( void  )

Get last loaded vector set.

Returns
pointer to geovect struct
NULL on failure (no vector set available)

Definition at line 96 of file gv.c.

References G_debug(), and NULL.

Referenced by gv_get_new_vect().

◆ gv_get_new_vect()

geovect * gv_get_new_vect ( void  )

Allocate memory for new vector set.

Returns
pointer to geovect struct
NULL on failure

Definition at line 118 of file gv.c.

References FIRST_VECT_ID, G_debug(), G_zero(), gv_get_last_vect(), and NULL.

Referenced by GV_new_vector().

◆ gv_get_prev_vect()

geovect * gv_get_prev_vect ( int  id)

Get previous vector set.

Parameters
idvector set id
Returns
pointer to geovect struct
NULL on failure

Definition at line 57 of file gv.c.

References G_debug(), and NULL.

◆ gv_get_vect()

geovect * gv_get_vect ( int  id)

◆ gv_init_vect()

int gv_init_vect ( geovect *  gv)

Initialize geovect struct.

Parameters
gvpointer to geovect struct
Returns
-1 on failure
0 on success

Definition at line 226 of file gv.c.

References G_debug().

◆ gv_num_vects()

int gv_num_vects ( void  )

Get number of loaded vector sets.

Returns
number of vector sets

Definition at line 77 of file gv.c.

References G_debug().

Referenced by GV_num_vects().

◆ gv_set_defaults()

int gv_set_defaults ( geovect *  gv)

Set attributes of vector set to default values.

Parameters
gvpointer to geovect struct
Returns
-1 on error
0 on success

Definition at line 187 of file gv.c.

References G_debug(), and NULL.

Referenced by GV_new_vector().

◆ gv_set_drapesurfs()

void gv_set_drapesurfs ( geovect *  gv,
int *  hsurfs,
int  nsurfs 
)

Set drape surfaces for vector set.

Parameters
gvpointer to geovect struct
hsurfsarray of surfaces (id)
nsurfsnumber of surfaces

Definition at line 364 of file gv.c.

◆ gv_update_drapesurfs()

void gv_update_drapesurfs ( void  )

Update drape surfaces.

Call after surface is deleted

Definition at line 157 of file gv.c.

References gs_get_surf(), and NULL.

Referenced by GS_delete_surface().