Vlib/snap.c File Reference

#include <math.h>
#include <grass/gis.h>
#include <grass/Vect.h>
#include <grass/glocale.h>

Include dependency graph for Vlib/snap.c:

Go to the source code of this file.

Data Structures
struct	XPNT
struct	NEW
Functions
int	add_item (int id, struct ilist *list)
void	Vect_snap_lines_list (struct Map_info *Map, struct ilist *List_lines, double thresh, struct Map_info *Err)
	Snap selected lines to existing vertex in threshold.
void	Vect_snap_lines (struct Map_info *Map, int type, double thresh, struct Map_info *Err)
	Snap lines in vector map to existing vertex in threshold.

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Function Documentation

int add_item	(	int	id,
		struct ilist *	list
	)

Definition at line 44 of file Vlib/snap.c.

References dig_list_add().

Referenced by Vect_snap_lines_list().

void Vect_snap_lines	(	struct Map_info *	Map,
		int	type,
		double	thresh,
		struct Map_info *	Err
	)

Snap lines in vector map to existing vertex in threshold.

For details see Vect_snap_lines_list()

Parameters:

[in]	Map	input map where vertices will be snapped
[in]	type	type of lines to snap
[in]	thresh	threshold in which snap vertices
[out]	Err	vector map where lines representing snap are written or NULL

Returns:

void

Definition at line 417 of file Vlib/snap.c.

References Vect_destroy_list(), Vect_get_num_lines(), Vect_line_alive(), Vect_list_append(), Vect_new_list(), Vect_read_line(), and Vect_snap_lines_list().

void Vect_snap_lines_list	(	struct Map_info *	Map,
		struct ilist *	List_lines,
		double	thresh,
		struct Map_info *	Err
	)

Snap selected lines to existing vertex in threshold.

Snap selected lines to existing vertices.

Warning:

Lines are not necessarily snapped to nearest vertex, but to vertex in threshold!

Lines showing how vertices were snapped may be optionally written to error map. Input map must be opened on level 2 for update at least on GV_BUILD_BASE.

Parameters:

[in]	Map	input map where vertices will be snapped
[in]	List_lines	list of lines to snap
[in]	thresh	threshold in which snap vertices
[out]	Err	vector map where lines representing snap are written or NULL

Returns:

void

Definition at line 80 of file Vlib/snap.c.

References add_item(), NEW::along, NEW::anchor, XPNT::anchor, Rect::boundary, dig_distance2_point_to_line(), RTreeDestroyNode(), RTreeInsertRect(), RTreeNewIndex(), RTreeSearch(), Vect_append_point(), Vect_delete_line(), Vect_destroy_cats_struct(), Vect_destroy_line_struct(), Vect_line_alive(), Vect_line_prune(), Vect_new_cats_struct(), Vect_new_line_struct(), Vect_new_list(), Vect_read_line(), Vect_reset_line(), Vect_reset_list(), Vect_rewrite_line(), Vect_write_line(), XPNT::x, and XPNT::y.

Referenced by Vect_snap_lines().