buffer.c File Reference

#include <stdlib.h>
#include <math.h>
#include "Vect.h"
#include "gis.h"

Include dependency graph for buffer.c:

Go to the source code of this file.

Defines
#define	LENGTH(DX, DY)   ( sqrt( (DX*DX)+(DY*DY) ) )
#define	PI   3.141592653589793116
Functions
int	find_cross (struct line_pnts *Points, int s1, int s2, int s3, int s4, int *s5, int *s6)
int	point_in_buf (struct line_pnts *Points, double px, double py, double d)
void	clean_parallel (struct line_pnts *Points, struct line_pnts *oPoints, double d, int rm_end)
void	parallel_line (struct line_pnts *Points, double d, double tol, struct line_pnts *nPoints)
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. Buffer is closed counter clockwise polygon. Warning: output line may contain loops!

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Define Documentation

#define LENGTH	(	DX,
		DY		)	( sqrt( (DX*DX)+(DY*DY) ) )

Definition at line 12 of file buffer.c.

#define PI   3.141592653589793116

Definition at line 13 of file buffer.c.

Referenced by parallel_line(), and Vect_line_buffer().

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Function Documentation

void clean_parallel	(	struct line_pnts *	Points,
		struct line_pnts *	oPoints,
		double	d,
		int	rm_end
	)

Definition at line 113 of file buffer.c.

References find_cross(), point_in_buf(), Vect_append_point(), Vect_find_poly_centroid(), Vect_new_line_struct(), and Vect_reset_line().

Referenced by Vect_line_parallel().

int find_cross	(	struct line_pnts *	Points,
		int	s1,
		int	s2,
		int	s3,
		int	s4,
		int *	s5,
		int *	s6
	)

Definition at line 38 of file buffer.c.

Referenced by clean_parallel().

void parallel_line	(	struct line_pnts *	Points,
		double	d,
		double	tol,
		struct line_pnts *	nPoints
	)

Definition at line 232 of file buffer.c.

References PI, Vect_append_point(), Vect_copy_xyz_to_pnts(), Vect_line_prune(), and Vect_reset_line().

Referenced by Vect_line_parallel().

int point_in_buf	(	struct line_pnts *	Points,
		double	px,
		double	py,
		double	d
	)

Definition at line 82 of file buffer.c.

Referenced by clean_parallel().

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!

Parameters:

	InPoints	input line
	distance
	tolerance	maximum distance between theoretical arc and polygon segments
	OutPoints	output line

Definition at line 336 of file buffer.c.

References 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.

Parameters:

	InPoints	input line
	distance
	tolerance	maximum distance between theoretical arc and polygon segments
	rm_end	remove end points falling into distance
	OutPoints	output line

Definition at line 313 of file buffer.c.

References clean_parallel(), and parallel_line().

Referenced by Vect_line_buffer().

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