Vedit library - extend lines (adopted from break.c) More...
Include dependency graph for extend.c:
Go to the source code of this file.
Macros | |
| #define | TOL 1e-9 |
Functions | |
| int | Vedit_extend_lines (struct Map_info *Map, struct ilist *List, int nodes, int parallel, double thresh) |
| Extend lines in given threshold. More... | |
| int | extend_lines (struct Map_info *Map, int first, int line_from, int line_to, int parallel, double thresh, struct ilist *List UNUSED) |
Detailed Description
Vedit library - extend lines (adopted from break.c)
(C) 2017 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.
Definition in file extend.c.
Macro Definition Documentation
◆ TOL
Function Documentation
◆ extend_lines()
◆ Vedit_extend_lines()
| int Vedit_extend_lines | ( | struct Map_info * | Map, |
| struct ilist * | List, | ||
| int | nodes, | ||
| int | parallel, | ||
| double | thresh | ||
| ) |
Extend lines in given threshold.
1. Extend first line only
\ \
id1 \ -> \
\
id2 ---------- -----+----
2. Extend both lines
\ \
id1 \ -> \
\
id2 --- +----
3. Extend first line when both are on the same line
id1 --- --- id2 -> -----+----
4. Connect two parallel lines (parallel=1)
id1 ------ -------
-> /
id2 ------ +-----
5. Don't connect two parallel lines (parallel=0)
id1 ------ ------
->
id2 ------ ------
- Parameters
-
Map pointer to Map_info List list of selected lines nodes 1 for start node, 2 for end node, other for both parallel connect parallel lines thresh threshold value
- Returns
- number of modified lines
Definition at line 68 of file extend.c.
References ilist::n_values, and Vect_new_list().
