break.c File Reference

Vedit library - split, break, connect lines. More...

#include <math.h>
#include <grass/vedit.h>

Include dependency graph for break.c:

Go to the source code of this file.

Functions
int	Vedit_split_lines (struct Map_info *Map, struct ilist *List, struct line_pnts *coord, double thresh, struct ilist *List_updated)
	Split selected lines on given position.
int	Vedit_connect_lines (struct Map_info *Map, struct ilist *List, double thresh)
	Connect lines in given threshold.

Detailed Description

Vedit library - split, break, connect lines.

(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>

Definition in file break.c.

Function Documentation

Vedit_connect_lines()

int Vedit_connect_lines	(	struct Map_info *	Map,
		struct ilist *	List,
		double	thresh
	)

Connect lines in given threshold.

\                 \
id1   \           ->       \
\
id2 ---------           -----+---

If two lines are selected and thresh is -1, no limit is applied.

Parameters

Map	pointer to Map_info
List	list of selected lines
thresh	threshold value

Returns

number of modified lines

-1 on error

Definition at line 158 of file break.c.

References G_debug(), GV_LINES, GV_POINTS, Vect_destroy_list(), Vect_find_line_list(), Vect_get_line_nodes(), Vect_get_line_type(), Vect_get_node_coor(), Vect_line_alive(), Vect_list_append(), Vect_new_list(), Vect_reset_list(), WITHOUT_Z, and x.

Vedit_split_lines()

int Vedit_split_lines	(	struct Map_info *	Map,
		struct ilist *	List,
		struct line_pnts *	coord,
		double	thresh,
		struct ilist *	List_updated
	)

Split selected lines on given position.

Parameters

	Map	pointer to Map_info
	List	list of selected lines
	coord	points location
	thresh	threshold
[out]	List_updated	list of rewritten features (or NULL)

Returns

number of modified lines

-1 on error

Definition at line 32 of file break.c.

References G_debug(), GV_LINES, l, line_pnts::n_points, NULL, Vect_append_point(), Vect_destroy_cats_struct(), Vect_destroy_line_struct(), Vect_line_alive(), Vect_line_distance(), Vect_line_length(), Vect_list_append(), Vect_new_cats_struct(), Vect_new_line_struct(), Vect_read_line(), Vect_reset_line(), Vect_rewrite_line(), Vect_write_line(), WITHOUT_Z, line_pnts::x, x, line_pnts::y, and line_pnts::z.