OGSF library - loading and manipulating vector sets (higher level functions) More...

#include <stdlib.h>
#include <string.h>
#include <grass/gis.h>
#include <grass/ogsf.h>
#include "gsget.h"

Include dependency graph for gv2.c:

Functions
int	GV_vect_exists (int id)
	Check if vector set exists. More...

int	GV_new_vector (void)
	Register new vector set. More...

int	GV_num_vects (void)
	Get number of available vector sets. More...

int *	GV_get_vect_list (int *numvects)
	Get list of vector sets. More...

int	GV_delete_vector (int id)
	Delete vector set from list. More...

int	GV_load_vector (int id, const char *filename)
	Load vector set. More...

int	GV_get_vectname (int id, char **filename)
	Get vector map name. More...

int	GV_set_style (int id, int mem, int color, int width, int use_z)
	Set vector style. More...

int	GV_get_style (int id, int mem, int color, int width, int use_z)
	Get vector style. More...

int	GV_set_style_thematic (int id, int layer, const char color, const char width, struct Colors *color_rules)
	Set vector set style for thematic mapping. More...

int	GV_unset_style_thematic (int id)
	Make style for thematic mapping inactive. More...

void	GV_set_trans (int id, float xtrans, float ytrans, float ztrans)
	Set trans ? More...

int	GV_get_trans (int id, float xtrans, float ytrans, float *ztrans)
	Get trans ? More...

int	GV_select_surf (int hv, int hs)
	Select surface identified by hs to have vector identified by hv draped over it. More...

int	GV_unselect_surf (int hv, int hs)
	Unselect surface. More...

int	GV_surf_is_selected (int hv, int hs)
	Check if surface is selected. More...

void	GV_draw_vect (int vid)
	Draw vector set. More...

void	GV_alldraw_vect (void)
	Draw all loaded vector sets. More...

void	GV_draw_fastvect (int vid)
	Draw vector set (fast mode) More...

void	GV_alldraw_fastvect (void)
	Draw all loaded vector sets (fast mode) More...

int	GV_Set_ClientData (int id, void *clientd)
	Set client data. More...

void *	GV_Get_ClientData (int id)
	Get client data. More...

Detailed Description

OGSF library - loading and manipulating vector sets (higher level functions)

This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details.

Author: Bill Brown USACERL, GMSL/University of Illinois; Updated by Martin landa <landa.martin gmail.com> (doxygenized in May 2008, thematic mapping in June 2011)

Definition in file gv2.c.

Function Documentation

◆ GV_alldraw_fastvect()

void GV_alldraw_fastvect ( void )

Draw all loaded vector sets (fast mode)

Definition at line 548 of file gv2.c.

◆ GV_alldraw_vect()

void GV_alldraw_vect ( void )

Draw all loaded vector sets.

Definition at line 506 of file gv2.c.

Referenced by Nviz_draw_all_vect().

◆ GV_delete_vector()

int GV_delete_vector ( int id )

Delete vector set from list.

Parameters

id	vector set id

Returns: 1 on success; -1 on error

Definition at line 128 of file gv2.c.

References G_debug(), gv_delete_vect(), and GV_vect_exists().

◆ GV_draw_fastvect()

void GV_draw_fastvect ( int vid )

Draw vector set (fast mode)

Todo:: Seems to be broken, nothing is drawn

Parameters

vid	vector set id

Definition at line 524 of file gv2.c.

References g_vect::drape_surf_id, gs_get_surf(), gv_get_vect(), gvd_vect(), and g_vect::n_surfs.

◆ GV_draw_vect()

void GV_draw_vect ( int vid )

Draw vector set.

Parameters

vid	vector set id

Definition at line 482 of file gv2.c.

References g_vect::drape_surf_id, gs_get_surf(), gv_get_vect(), gvd_vect(), and g_vect::n_surfs.

◆ GV_Get_ClientData()

void* GV_Get_ClientData ( int id )

Get client data.

Parameters

id	vector set id

Returns: pointer to client data; NULL on error

Definition at line 590 of file gv2.c.

References g_vect::clientdata, gv_get_vect(), and NULL.

◆ GV_get_style()

int GV_get_style	(	int	id,
		int *	mem,
		int *	color,
		int *	width,
		int *	use_z
	)

Get vector style.

Parameters

	id	vector set id
[out]	mem	non-zero for use memory
[out]	color	color value
[out]	width	line width
[out]	use_z	non-zero for 3d mode

Returns: -1 on error (invalid vector set id); 1 on success

Definition at line 257 of file gv2.c.

◆ GV_get_trans()

int GV_get_trans	(	int	id,
		float *	xtrans,
		float *	ytrans,
		float *	ztrans
	)

Get trans ?

Parameters

	id	vector set id
[out]	xtrans,ytrans,ztrans	x/y/z trans values

Definition at line 366 of file gv2.c.

References gv_get_vect(), g_vect::x_trans, g_vect::y_trans, and g_vect::z_trans.

◆ GV_get_vect_list()

int* GV_get_vect_list ( int * numvects )

Get list of vector sets.

Must free when no longer needed!

Parameters

numvects number of vector sets

Returns: pointer to list of point sets; NULL on error

Definition at line 98 of file gv2.c.

◆ GV_get_vectname()

int GV_get_vectname	(	int	id,
		char **	filename
	)

Get vector map name.

Note: char array is allocated by G_store()

Parameters

id	vector set id
filename	&filename

Returns: -1 on error (invalid vector set id); 1 on success

Definition at line 203 of file gv2.c.

◆ GV_load_vector()

int GV_load_vector	(	int	id,
		const char *	filename
	)

Load vector set.

Check to see if handle already loaded, if so - free before loading new for now, always load to memory

Todo:: Load file handle & ready for reading instead of using memory

Parameters

id	vector set id
filename	filename

Returns: -1 on error (invalid vector set id); 1 on success

Definition at line 171 of file gv2.c.

◆ GV_new_vector()

int GV_new_vector ( void )

Register new vector set.

Returns: vector set id; -1 on error

Definition at line 60 of file gv2.c.

◆ GV_num_vects()

int GV_num_vects ( void )

Get number of available vector sets.

Returns: number of vector sets

Definition at line 83 of file gv2.c.

References gv_num_vects().

◆ GV_select_surf()

int GV_select_surf	(	int	hv,
		int	hs
	)

Select surface identified by hs to have vector identified by hv draped over it.

Parameters

hv	vector set id
hs	surface id

Returns: 1 on success; -1 on error

Definition at line 393 of file gv2.c.

References g_vect::drape_surf_id, GS_surf_exists(), gv_get_vect(), GV_surf_is_selected(), and g_vect::n_surfs.

◆ GV_Set_ClientData()

int GV_Set_ClientData	(	int	id,
		void *	clientd
	)

Set client data.

Parameters

id	vector set id
clientd	pointer to client data

Returns: 1 on success; -1 on error

Definition at line 568 of file gv2.c.

References g_vect::clientdata, and gv_get_vect().

◆ GV_set_style()

int GV_set_style	(	int	id,
		int	mem,
		int	color,
		int	width,
		int	use_z
	)

Set vector style.

Parameters

id	vector set id
mem	non-zero for use memory
color	color value
width	line width
use_z	non-zero for 3d mode

Returns: -1 on error (invalid vector set id); 1 on success

Definition at line 228 of file gv2.c.

◆ GV_set_style_thematic()

int GV_set_style_thematic	(	int	id,
		int	layer,
		const char *	color,
		const char *	width,
		struct Colors *	color_rules
	)

Set vector set style for thematic mapping.

Updates also style for each geoline.

Parameters

id	vector set id
layer	layer number for thematic mapping
color	color column name
width	width column name
colors	pointer to Colors structure or NULL

Returns: 1 on success; -1 on error (point set not found)

Definition at line 287 of file gv2.c.

◆ GV_set_trans()

void GV_set_trans	(	int	id,
		float	xtrans,
		float	ytrans,
		float	ztrans
	)

Set trans ?

Parameters

id	vector set id
xtrans,ytrans,ztrans	x/y/z trans values

Definition at line 343 of file gv2.c.

References G_debug(), gv_get_vect(), g_vect::x_trans, g_vect::y_trans, and g_vect::z_trans.

◆ GV_surf_is_selected()

int GV_surf_is_selected	(	int	hv,
		int	hs
	)

Check if surface is selected.

Parameters

hv	vector set id
hs	surface id

Returns: 1 selected; 0 not selected

Definition at line 459 of file gv2.c.

References g_vect::drape_surf_id, gv_get_vect(), and g_vect::n_surfs.

Referenced by GV_select_surf(), and GV_unselect_surf().

◆ GV_unselect_surf()

int GV_unselect_surf	(	int	hv,
		int	hs
	)

Unselect surface.

Parameters

hv	vector set id
hs	surface id

Returns: 1 on success; -1 on error

Definition at line 422 of file gv2.c.

References g_vect::drape_surf_id, gv_get_vect(), GV_surf_is_selected(), and g_vect::n_surfs.

◆ GV_unset_style_thematic()

int GV_unset_style_thematic ( int id )

Make style for thematic mapping inactive.

Parameters

id	vector set id

Returns: 1 on success; -1 on error (point set not found)

Definition at line 320 of file gv2.c.

References g_vect_style_thematic::active, G_debug(), gv_get_vect(), NULL, and g_vect::tstyle.

◆ GV_vect_exists()

int GV_vect_exists ( int id )

Check if vector set exists.

Parameters

id	vector set id

Returns: 0 not found; 1 found

Definition at line 35 of file gv2.c.

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

Referenced by GV_delete_vector().

Functions

Detailed Description

Function Documentation

◆ GV_alldraw_fastvect()

◆ GV_alldraw_vect()

◆ GV_delete_vector()

◆ GV_draw_fastvect()

◆ GV_draw_vect()

◆ GV_Get_ClientData()

◆ GV_get_style()

◆ GV_get_trans()

◆ GV_get_vect_list()

◆ GV_get_vectname()

◆ GV_load_vector()

◆ GV_new_vector()

◆ GV_num_vects()

◆ GV_select_surf()

◆ GV_Set_ClientData()

◆ GV_set_style()

◆ GV_set_style_thematic()

◆ GV_set_trans()

◆ GV_surf_is_selected()

◆ GV_unselect_surf()

◆ GV_unset_style_thematic()

◆ GV_vect_exists()