gv3.c File Reference

OGSF library - loading vector sets (lower level functions) More...

#include <stdlib.h>
#include <grass/gis.h>
#include <grass/colors.h>
#include <grass/raster.h>
#include <grass/vector.h>
#include <grass/dbmi.h>
#include <grass/glocale.h>
#include <grass/ogsf.h>

Include dependency graph for gv3.c:

Go to the source code of this file.

Functions
geoline *	Gv_load_vect (const char *grassname, int *nlines)
	Load vector map to memory.
void	sub_Vectmem (int minus)
	Tracking memory.
int	Gv_load_vect_thematic (geovect *gv, struct Colors *colors)
	Load styles for geolines based on thematic mapping.

Detailed Description

OGSF library - loading vector sets (lower level functions)

GRASS OpenGL gsurf OGSF Library

(C) 1999-2008, 2011 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.

Author

Bill Brown USACERL (December 1993)

Updated by Martin Landa <landa.martin gmail.com> (doxygenized in May 2008, thematic mapping in August 2011)

Definition in file gv3.c.

Function Documentation

Gv_load_vect()

geoline * Gv_load_vect	(	const char *	grassname,
		int *	nlines
	)

Load vector map to memory.

The other alternative may be to load to a tmp file

Parameters

	grassname	vector map name
[out]	nlines	number of loaded features

Returns

pointer to geoline struct

NULL on failure

Definition at line 47 of file gv3.c.

References _, Cell_head::east, G_calloc, G_debug(), G_find_vector2(), G_free(), G_fully_qualified_name(), G_get_set_window(), G_malloc, G_message(), G_warning(), GS_v3cross(), GV_FACE, GV_LINES, line_pnts::n_points, g_line::next, Cell_head::north, NULL, OGSF_LINE, OGSF_POLYGON, PORT_DOUBLE_MAX, Cell_head::south, Cell_head::top, Vect_close(), Vect_get_area_points(), Vect_get_num_areas(), Vect_is_3d(), Vect_new_cats_struct(), Vect_new_line_struct(), Vect_open_old(), Vect_read_next_line(), Vect_reset_cats(), Vect_set_constraint_region(), Vect_set_open_level(), Cell_head::west, X, line_pnts::x, Y, line_pnts::y, Z, and line_pnts::z.

Referenced by GV_load_vector().

Gv_load_vect_thematic()

int Gv_load_vect_thematic	(	geovect *	gv,
		struct Colors *	colors
	)

Load styles for geolines based on thematic mapping.

Parameters

gv	pointer to geovect structure
colors	pointer to Colors structure or NULL

Returns

number of features defined by thematic mapping

-1 on error

Definition at line 319 of file gv3.c.

References _, BLU_MASK, db_get_value_int(), db_get_value_string(), db_select_value(), db_start_driver_open_database(), field_info::driver, G_fatal_error(), G_find_vector2(), G_fully_qualified_name(), G_malloc, G_message(), G_str_to_color(), G_warning(), G_zero(), GRN_MASK, Rast_get_c_color(), RED_MASK, Vect_cat_get(), Vect_get_field(), Vect_open_old(), and Vect_set_open_level().

Referenced by GV_set_style_thematic().

sub_Vectmem()

void sub_Vectmem

(

int

minus

)

Tracking memory.

Parameters

minus

mimus number

Definition at line 298 of file gv3.c.

References G_debug().

Referenced by gv_free_vectmem().