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/*!
\file lib/vector/vedit/move.c
\brief Vedit library - move primitives
(C) 2007-2008 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 Martin Landa <landa.martin gmail.com>
\author Jachym Cepicky <jachym.cepicky gmail.com>
*/
#include <grass/vedit.h>
/*!
\brief Move selected primitives
\param Map pointer to Map_info
\param BgMap, nbgmaps list of background vector maps used for snapping
\param List list of primitives to be moved
\param move_x,move_y,move_z direction (move_z used only if map is 3D)
\param snap enable snapping (see globals.h)
\return number of modified primitives
\return -1 on error
*/
int Vedit_move_lines(struct Map_info *Map, struct Map_info **BgMap,
int nbgmaps, struct ilist *List, double move_x,
double move_y, double move_z, int snap, double thresh)
{
struct line_pnts *Points;
struct line_cats *Cats;
int i, j;
int type, newline, line;
int nlines_moved;
double *x, *y, *z;
nlines_moved = 0;
Points = Vect_new_line_struct();
Cats = Vect_new_cats_struct();
for (i = 0; i < List->n_values; i++) {
line = List->value[i];
if (!Vect_line_alive(Map, line))
continue;
type = Vect_read_line(Map, Points, Cats, line);
G_debug(3, "Vedit_move_lines(): type=%d, line=%d", type, line);
x = Points->x;
y = Points->y;
z = Points->z;
/* move */
for (j = 0; j < Points->n_points; j++) {
x[j] += move_x;
y[j] += move_y;
if (Vect_is_3d(Map))
z[j] += move_z;
if (snap != NO_SNAP) {
if (Vedit_snap_point(Map, line, &x[j], &y[j], &z[j], thresh,
(snap == SNAPVERTEX) ? 1 : 0) == 0) {
/* check also background maps */
int bgi;
for (bgi = 0; bgi < nbgmaps; bgi++) {
if (Vedit_snap_point
(BgMap[bgi], line, &x[j], &y[j], &z[j], thresh,
(snap == SNAPVERTEX) ? 1 : 0))
break; /* snapped, don't continue */
}
}
}
} /* for each point at line */
newline = Vect_rewrite_line(Map, line, type, Points, Cats);
if (newline < 0) {
return -1;
}
nlines_moved++;
}
Vect_destroy_line_struct(Points);
Vect_destroy_cats_struct(Cats);
return nlines_moved;
}
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