vector/vedit/select.c File Reference

Vedit library - select primitives by query. More...

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

Include dependency graph for vector/vedit/select.c:

Go to the source code of this file.

Functions
int	Vedit_select_by_query (struct Map_info *Map, int type, int layer, double thresh, int query, struct ilist *List)
	Select primitives by query (based on geometry properties) More...

Detailed Description

Vedit library - select primitives by query.

(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 vector/vedit/select.c.

Function Documentation

int Vedit_select_by_query	(	struct Map_info *	Map,
		int	type,
		int	layer,
		double	thresh,
		int	query,
		struct ilist *	List
	)

Select primitives by query (based on geometry properties)

Currently supported:

• QUERY_LENGTH, select all lines longer than threshold (or shorter if threshold is < 0)
• QUERY_DANGLE, select all dangles longer than threshold (or shorter if threshold is < 0)

Perform global query if List is empty otherwise query only selected vector objects.

Parameters

	Map	pointer to Map_info
	type	feature type
	layer	layer number
	thresh	threshold value (< 0 for 'shorter', > 0 for 'longer')
	query	query (length, dangle, ...)
[in,out]	List	list of selected features

Returns

number of selected primitives

Definition at line 43 of file vector/vedit/select.c.

References G_debug(), num, Vect_destroy_cats_struct(), Vect_destroy_line_struct(), Vect_destroy_list(), Vect_get_num_lines(), Vect_list_append(), Vect_new_cats_struct(), Vect_new_line_struct(), Vect_new_list(), Vect_select_dangles(), and Vect_val_in_list().

Referenced by wxdigit.IVDigit::SelectLinesByQuery().