GRASS Programmer's Manual
6.4.2(2012)
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Vector library - nearest, adjust, parallel lines. More...
#include <stdlib.h>
#include <math.h>
#include <grass/Vect.h>
#include <grass/gis.h>
Go to the source code of this file.
Defines | |
#define | LENGTH(DX, DY) ( sqrt( (DX*DX)+(DY*DY) ) ) |
#define | PI M_PI |
Functions | |
void | Vect_line_parallel (struct line_pnts *InPoints, double distance, double tolerance, int rm_end, struct line_pnts *OutPoints) |
Create parrallel line. | |
void | Vect_line_buffer (struct line_pnts *InPoints, double distance, double tolerance, struct line_pnts *OutPoints) |
Create buffer around the line line. |
Vector library - nearest, adjust, parallel lines.
Higher level functions for reading/writing/manipulating vectors.
(C) 2001-2008 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.
Definition in file buffer.c.
#define PI M_PI |
Definition at line 26 of file buffer.c.
Referenced by Vect_line_buffer().
void Vect_line_buffer | ( | struct line_pnts * | InPoints, |
double | distance, | ||
double | tolerance, | ||
struct line_pnts * | OutPoints | ||
) |
Create buffer around the line line.
Buffer is closed counter clockwise polygon. Warning: output line may contain loops!
InPoints | input line | |
distance | create buffer in distance | |
tolerance | maximum distance between theoretical arc and polygon segments | |
[out] | OutPoints | output line |
Definition at line 380 of file buffer.c.
References NULL, PI, Vect_append_point(), Vect_append_points(), Vect_line_parallel(), Vect_line_prune(), Vect_new_line_struct(), and Vect_reset_line().
void Vect_line_parallel | ( | struct line_pnts * | InPoints, |
double | distance, | ||
double | tolerance, | ||
int | rm_end, | ||
struct line_pnts * | OutPoints | ||
) |
Create parrallel line.
InPoints | input line | |
distance | create parrallel line in distance | |
tolerance | maximum distance between theoretical arc and polygon segments | |
rm_end | remove end points falling into distance | |
[out] | OutPoints | output line |
Definition at line 354 of file buffer.c.
References G_debug().
Referenced by Vect_line_buffer().