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

Include dependency graph for vector/Vlib/area.c:

Functions
int	Vect_get_area_points (struct Map_info Map, int area, struct line_pnts BPoints)
	Returns the polygon array of points in BPoints. More...

int	Vect_get_isle_points (struct Map_info Map, int isle, struct line_pnts BPoints)
	Returns the polygon array of points in BPoints. More...

int	Vect_get_area_centroid (struct Map_info *Map, int area)
	Returns centroid number of area. More...

int	Vect_get_area_boundaries (struct Map_info Map, int area, struct ilist List)
	Creates list of boundaries for area. More...

int	Vect_get_isle_boundaries (struct Map_info Map, int isle, struct ilist List)
	Creates list of boundaries for isle. More...

int	Vect_get_area_num_isles (struct Map_info *Map, int area)
	Returns number of isles for area. More...

int	Vect_get_area_isle (struct Map_info *Map, int area, int isle)
	Returns isle for area. More...

int	Vect_get_isle_area (struct Map_info *Map, int isle)
	Returns area for isle. More...

double	Vect_area_perimeter (struct line_pnts *Points)
	Calculate area perimeter. More...

int	Vect_point_in_area (struct Map_info *Map, int area, double x, double y)
	Returns 1 if point is in area. More...

double	Vect_get_area_area (struct Map_info *Map, int area)
	Returns area of area without areas of isles. More...

int	Vect_get_area_cats (struct Map_info Map, int area, struct line_cats Cats)
	Get area categories. More...

int	Vect_get_area_cat (struct Map_info *Map, int area, int field)
	Find FIRST category of given field and area. More...

Function Documentation

double Vect_area_perimeter ( struct line_pnts * Points )

Calculate area perimeter.

Parameters

Points list of points defining area boundary

Returns: area perimeter

Definition at line 328 of file vector/Vlib/area.c.

References Vect_line_length().

Referenced by wxdigit.IVDigit::GetAreaPerimeter().

double Vect_get_area_area	(	struct Map_info *	Map,
		int	area
	)

Returns area of area without areas of isles.

Parameters

Map	vector map
area	area id

Returns: area of area without areas of isles

Definition at line 379 of file vector/Vlib/area.c.

References G_area_of_polygon(), G_begin_polygon_area_calculations(), G_debug(), tools::size, Vect_destroy_line_struct(), Vect_get_area_points(), Vect_get_isle_points(), and Vect_new_line_struct().

Referenced by wxdigit.IVDigit::GetAreaSize(), and Vect_remove_small_areas().

int Vect_get_area_boundaries	(	struct Map_info *	Map,
		int	area,
		struct ilist *	List
	)

Creates list of boundaries for area.

Parameters

Map	vector map
area	area id
List	pointer to list of boundaries

Returns: number of boundaries

Definition at line 179 of file vector/Vlib/area.c.

References G_debug(), G_fatal_error(), NULL, Vect_list_append(), and Vect_reset_list().

Referenced by Vect_remove_small_areas().

int Vect_get_area_cat	(	struct Map_info *	Map,
		int	area,
		int	field
	)

Find FIRST category of given field and area.

Parameters

Map	vector map
area	area id
field	layer number

Returns: first found category of given field; -1 no centroid or no category found

Definition at line 453 of file vector/Vlib/area.c.

References NULL, Vect_get_area_cats(), Vect_new_cats_struct(), and Vect_reset_cats().

int Vect_get_area_cats	(	struct Map_info *	Map,
		int	area,
		struct line_cats *	Cats
	)

Get area categories.

Parameters

	Map	vector map
	area	area id
[out]	Cats	list of categories

Returns: 0 OK centroid found (but may be without categories); 1 no centroid found

Definition at line 425 of file vector/Vlib/area.c.

References NULL, Vect_get_area_centroid(), Vect_read_line(), and Vect_reset_cats().

Referenced by Vect_get_area_cat().

int Vect_get_area_centroid	(	struct Map_info *	Map,
		int	area
	)

Returns centroid number of area.

Parameters

Map	vector map
area	area id

Returns: centroid number of area; 0 if no centroid found

Definition at line 153 of file vector/Vlib/area.c.

References G_debug(), G_fatal_error(), and NULL.

Referenced by wxdigit.IVDigit::InitCats(), Vect_build_partial(), Vect_get_area_cats(), Vect_overlay_and(), Vect_remove_small_areas(), Vect_set_varray_from_cat_list(), and Vect_set_varray_from_db().

int Vect_get_area_isle	(	struct Map_info *	Map,
		int	area,
		int	isle
	)

Returns isle for area.

Parameters

Map	vector map
area	area id
isle	isle id

Returns: isles for area; 0 if no isle found

Definition at line 275 of file vector/Vlib/area.c.

References G_debug(), G_fatal_error(), and NULL.

Referenced by Vect_area_buffer2(), Vect_get_point_in_area(), and Vect_read_area_geos().

int Vect_get_area_num_isles	(	struct Map_info *	Map,
		int	area
	)

Returns number of isles for area.

Parameters

Map	vector map
area	area id

Returns: number of isles for area; 0 if area not found

Definition at line 246 of file vector/Vlib/area.c.

References G_debug(), G_fatal_error(), and NULL.

Referenced by Vect_area_buffer2(), Vect_get_point_in_area(), and Vect_read_area_geos().

int Vect_get_area_points	(	struct Map_info *	Map,
		int	area,
		struct line_pnts *	BPoints
	)

Returns the polygon array of points in BPoints.

Parameters

	Map	vector map
	area	area id
[out]	BPoints	points array

Returns: number of points; -1 on error

Definition at line 37 of file vector/Vlib/area.c.

References G_debug(), G_fatal_error(), G_warning(), NULL, Vect_append_points(), Vect_new_line_struct(), and Vect_read_line().

Referenced by wxdigit.IVDigit::GetAreaPerimeter(), Gv_load_vect(), Vect_area_buffer2(), Vect_get_area_area(), Vect_get_point_in_area(), Vect_isle_find_area(), and Vect_tin_get_z().

int Vect_get_isle_area	(	struct Map_info *	Map,
		int	isle
	)

Returns area for isle.

Parameters

Map	vector
isle	island number

Returns: area id; 0 area not found

Definition at line 302 of file vector/Vlib/area.c.

References G_debug(), G_fatal_error(), and NULL.

Referenced by Vect_select_areas_by_polygon().

int Vect_get_isle_boundaries	(	struct Map_info *	Map,
		int	isle,
		struct ilist *	List
	)

Creates list of boundaries for isle.

Parameters

Map	vector map
isle	island number
List	pointer to list where boundaries are stored

Returns: number of boundaries

Definition at line 213 of file vector/Vlib/area.c.

References G_debug(), G_fatal_error(), NULL, Vect_list_append(), and Vect_reset_list().

int Vect_get_isle_points	(	struct Map_info *	Map,
		int	isle,
		struct line_pnts *	BPoints
	)

Returns the polygon array of points in BPoints.

Parameters

	Map	vector map
	isle	island id
[out]	BPoints	points array

Returns: number of points or -1 on error

Definition at line 98 of file vector/Vlib/area.c.

References G_debug(), G_fatal_error(), NULL, Vect_append_points(), Vect_new_line_struct(), and Vect_read_line().

Referenced by Vect_area_buffer2(), Vect_find_island(), Vect_get_area_area(), and Vect_get_point_in_area().

int Vect_point_in_area	(	struct Map_info *	Map,
		int	area,
		double	x,
		double	y
	)

Returns 1 if point is in area.

Parameters

Map	vector map
area	area id
x,y	point coordinates

Returns: 1 if point is in area; 0 if not

Definition at line 344 of file vector/Vlib/area.c.

References NULL, Vect_point_in_area_outer_ring(), and Vect_point_in_island().

Referenced by Vect_find_area().

Functions

Function Documentation