GRASS Programmer's Manual
6.4.3(2013)-r
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flip.c
Go to the documentation of this file.
1
14
#include <grass/vedit.h>
15
25
int
Vedit_flip_lines
(
struct
Map_info *
Map
,
struct
ilist *List)
26
{
27
struct
line_cats *Cats;
28
struct
line_pnts *Points;
29
int
i, line,
type
;
30
int
nlines_flipped;
31
32
nlines_flipped = 0;
33
34
Points =
Vect_new_line_struct
();
35
Cats =
Vect_new_cats_struct
();
36
37
for
(i = 0; i < List->n_values; i++) {
38
line = List->value[i];
39
40
if
(!
Vect_line_alive
(Map, line))
41
continue
;
42
43
type =
Vect_read_line
(Map, Points, Cats, line);
44
45
if
(!(type &
GV_LINES
))
46
continue
;
47
48
Vect_line_reverse
(Points);
49
50
if
(
Vect_rewrite_line
(Map, line, type, Points, Cats) < 0) {
51
return
-1;
52
}
53
54
G_debug
(3,
"Vedit_flip_lines(): line=%d"
, line);
55
56
nlines_flipped++;
57
}
58
59
/* destroy structures */
60
Vect_destroy_line_struct
(Points);
61
Vect_destroy_cats_struct
(Cats);
62
63
return
nlines_flipped;
64
}
lib
vector
vedit
flip.c
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