OGSF library - loading surfaces (lower level functions) More...

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

Include dependency graph for gs3.c:

Go to the source code of this file.

Macros
#define	INIT_MINMAX(p, nm, size, min, max, found)
	Used in the function Gs_update_attrange() More...

#define	SET_MINMAX(p, nm, size, min, max)
	Used in the function Gs_update_attrange() More...

#define	NO_DATA_COL 0xffffff

Typedefs
typedef int	FILEDESC

Functions
double	Gs_distance (double from, double to)
	Calculates distance in METERS between two points in current projection (2D) More...

int	Gs_loadmap_as_float (struct Cell_head wind, const char map_name, float buff, struct BM nullmap, int *has_null)
	Load raster map as floating point map. More...

int	Gs_loadmap_as_int (struct Cell_head wind, const char map_name, int buff, struct BM nullmap, int *has_null)
	Load raster map as integer map. More...

int	Gs_numtype (const char filename, int negflag)
	Get map data type. More...

int	Gs_loadmap_as_short (struct Cell_head wind, const char map_name, short buff, struct BM nullmap, int *has_null)
	Load raster map as integer map. More...

int	Gs_loadmap_as_char (struct Cell_head wind, const char map_name, unsigned char buff, struct BM nullmap, int *has_null)
	Load raster map as integer map. More...

int	Gs_loadmap_as_bitmap (struct Cell_head wind, const char map_name, struct BM *buff)
	Load raster map as integer map. More...

int	Gs_build_256lookup (const char filename, int buff)
	Build color table (256) More...

void	Gs_pack_colors (const char filename, int buff, int rows, int cols)
	Pack color table. More...

void	Gs_pack_colors_float (const char filename, float fbuf, int *ibuf, int rows, int cols)
	Pack color table (floating-point map) More...

int	Gs_get_cat_label (const char filename, int drow, int dcol, char catstr)
	Get categories/labels. More...

int	Gs_save_3dview (const char vname, geoview gv, geodisplay gd, struct Cell_head w, geosurf *defsurf)
	Save 3dview. More...

int	Gs_load_3dview (const char vname, geoview gv, geodisplay gd, struct Cell_head w, geosurf *defsurf)
	Load 3dview. More...

int	Gs_update_attrange (geosurf *gs, int desc)
	Update no_zero ranges for attribute (actually no_null now) More...

Detailed Description

OGSF library - loading surfaces (lower level functions)

GRASS OpenGL gsurf OGSF Library

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 (January 1993); Doxygenized by Martin Landa <landa.martin gmail.com> (May 2008)

Definition in file gs3.c.

Macro Definition Documentation

◆ INIT_MINMAX

#define INIT_MINMAX	(	p,
		nm,
		size,
		min,
		max,
		found
	)

Value:

found = 0; \
        p+=(size-1); \
        while (size--) \
        { \
            if (!BM_GET_BYOFFSET(nm, size)) \
            { \
                min = max = *p; \
                found = 1; \
                break; \
            } \
            p--; \
        }

Used in the function Gs_update_attrange()

Definition at line 35 of file gs3.c.

Referenced by Gs_update_attrange().

◆ NO_DATA_COL

#define NO_DATA_COL 0xffffff

Definition at line 72 of file gs3.c.

◆ SET_MINMAX

#define SET_MINMAX	(	p,
		nm,
		size,
		min,
		max
	)

Value:

p+=(size-1); \
        while(size--) \
        { \
            if (!BM_GET_BYOFFSET(nm, size)) \
            { \
                if (*p < min) \
                { \
                    min = *p; \
                } \
                else if (*p > max) \
                { \
                    max = *p; \
                }  \
            } \
            p--; \
        }

Used in the function Gs_update_attrange()

Definition at line 52 of file gs3.c.

Referenced by Gs_update_attrange().

Typedef Documentation

◆ FILEDESC

typedef int FILEDESC

Definition at line 70 of file gs3.c.

Function Documentation

◆ Gs_build_256lookup()

int Gs_build_256lookup	(	const char *	filename,
		int *	buff
	)

Build color table (256)

Calling function must have already allocated space in buff for range of data (256 for now) - simply calls get_color for each cat in color range

Parameters

	filename	raster map name
[out]	buff	data buffer

Returns: 1 on success; 0 on failure

Definition at line 576 of file gs3.c.

◆ Gs_distance()

double Gs_distance	(	double *	from,
		double *	to
	)

Calculates distance in METERS between two points in current projection (2D)

Uses G_distance().

Parameters

from	'from' point (X, Y)
to	'to' point (X, Y)

Returns: distance

Definition at line 84 of file gs3.c.

Referenced by GS_geodistance().

◆ Gs_get_cat_label()

int Gs_get_cat_label	(	const char *	filename,
		int	drow,
		int	dcol,
		char *	catstr
	)

Get categories/labels.

Formats label as in d.what.rast -> (catval) catlabel

Parameters

filename	raster map name
drow
dcol
catstr	category string

Returns: 1 on success; 0 on failure

Definition at line 776 of file gs3.c.

Referenced by GS_get_cat_at_xy().

◆ Gs_load_3dview()

int Gs_load_3dview	(	const char *	vname,
		geoview *	gv,
		geodisplay *	gd,
		struct Cell_head *	w,
		geosurf *	defsurf
	)

Load 3dview.

Parameters

vname	view name
gv	pointer to geoview struct
gd	pointer to geodisplay struct
w	current window
defsurf	default geosurf struct

Returns: 1

Definition at line 951 of file gs3.c.

References _, lightdefs::ambient, G_3dview::ambient, lightdefs::color, G_3dview::colorgrid, G_3dview::display_type, DM_COL_WIRE, DM_GOURAUD, DM_POLY, DM_WIRE, DM_WIRE_POLY, Cell_head::ew_res, G_3dview::exag, G_3dview::fov, FROM, G_3dview::from_to, G_find_file2(), G_get_3dview(), G_warning(), GS_alldraw_wire(), GS_moveto_real(), GS_set_focus(), GS_set_fov(), GS_set_global_exag(), GS_set_twist(), GS_setall_drawmode(), GS_setall_drawres(), G_3dview::lightcol, G_3dview::lightpos, geoview::lights, G_3dview::lightson, G_3dview::mesh_freq, Cell_head::ns_res, NULL, G_3dview::pgm_id, G_3dview::poly_freq, lightdefs::position, G_3dview::shading, lightdefs::shine, G_3dview::shine, Cell_head::south, TO, G_3dview::twist, G_3dview::vwin, Cell_head::west, X, Y, and Z.

Referenced by GS_load_3dview().

◆ Gs_loadmap_as_bitmap()

int Gs_loadmap_as_bitmap	(	struct Cell_head *	wind,
		const char *	map_name,
		struct BM *	buff
	)

Load raster map as integer map.

Calling function must have already allocated space in buff for struct BM of wind->rows & wind->cols.

This routine simply loads the map into the bitmap by repetitve calls to get_map_row. Any value other than 0 in the map will set the bitmap. (may want to change later to allow specific value to set)

Changed to use null.

Parameters

	wind	current window
	map_name	raster map name
[out]	buff	data buffer

Returns: 1 on success; -1 on failure

Definition at line 517 of file gs3.c.

◆ Gs_loadmap_as_char()

int Gs_loadmap_as_char	(	struct Cell_head *	wind,
		const char *	map_name,
		unsigned char *	buff,
		struct BM *	nullmap,
		int *	has_null
	)

Load raster map as integer map.

Calling function must have already allocated space in buff for wind->rows * wind->cols unsigned chars.

This routine simply loads the map into a 2d array by repetitve calls to get_map_row.

Since signs of chars can be tricky, we only load positive chars between 0-255.

Todo:: fn body Gs_loadmap_as_float()

Parameters

	wind	current window
	map_name	raster map name
[out]	buff	data buffer
[out]	nullmap	null map buffer
[out]	has_null	indicates if raster map contains null-data

Returns: 1 on success; -1 on failure; -2 if read ok, but 1 or more values were too large (small) to fit into an unsigned char. (in which case the max (min) char is used)

Definition at line 417 of file gs3.c.

◆ Gs_loadmap_as_float()

int Gs_loadmap_as_float	(	struct Cell_head *	wind,
		const char *	map_name,
		float *	buff,
		struct BM *	nullmap,
		int *	has_null
	)

Load raster map as floating point map.

Calling function must have already allocated space in buff for wind->rows * wind->cols floats.

This routine simply loads the map into a 2d array by repetitve calls to get_f_raster_row.

Parameters

	wind	current window
	map_name	raster map name
[out]	buff	data buffer
[out]	nullmap	null map buffer
[out]	has_null	indicates if raster map contains null-data

Returns: 1 on success; 0 on failure

Definition at line 114 of file gs3.c.

◆ Gs_loadmap_as_int()

int Gs_loadmap_as_int	(	struct Cell_head *	wind,
		const char *	map_name,
		int *	buff,
		struct BM *	nullmap,
		int *	has_null
	)

Load raster map as integer map.

Calling function must have already allocated space in buff for wind->rows * wind->cols floats.

This routine simply loads the map into a 2d array by repetitve calls to get_f_raster_row.

Todo:: fn body of Gs_loadmap_as_float()

Parameters

	wind	current window
	map_name	raster map name
[out]	buff	data buffer
[out]	nullmap	null map buffer
[out]	has_null	indicates if raster map contains null-data

Returns: 1 on success; 0 on failure

Definition at line 178 of file gs3.c.

◆ Gs_loadmap_as_short()

int Gs_loadmap_as_short	(	struct Cell_head *	wind,
		const char *	map_name,
		short *	buff,
		struct BM *	nullmap,
		int *	has_null
	)

Load raster map as integer map.

Calling function must have already allocated space in buff for wind->rows * wind->cols shorts.

This routine simply loads the map into a 2d array by repetitve calls to get_map_row.

Parameters

	wind	current window
	map_name	raster map name
[out]	buff	data buffer
[out]	nullmap	null map buffer
[out]	has_null	indicates if raster map contains null-data

Returns: 1 on success; -1 on failure,; -2 if read ok, but 1 or more values were too large (small) to fit into a short (in which case the max (min) short is used)

Definition at line 312 of file gs3.c.

◆ Gs_numtype()

int Gs_numtype	(	const char *	filename,
		int *	negflag
	)

Get map data type.

Parameters

filename	raster map name
negflag

Returns: -1 if map is integer and Rast_read_range() fails; data type (ARRY_*)

Definition at line 230 of file gs3.c.

◆ Gs_pack_colors()

void Gs_pack_colors	(	const char *	filename,
		int *	buff,
		int	rows,
		int	cols
	)

Pack color table.

Passed an array of 32 bit ints that is converted from cell values to packed colors (0xbbggrr)

Parameters

filename	raster map name
buff
rows	number of rows
cols	number of cols

Definition at line 636 of file gs3.c.

◆ Gs_pack_colors_float()

void Gs_pack_colors_float	(	const char *	filename,
		float *	fbuf,
		int *	ibuf,
		int	rows,
		int	cols
	)

Pack color table (floating-point map)

Passed a array of floats that will be converted from cell values to packed colors (0xbbggrr) and float to int Floating point data not freed here, use: gsds_free_data_buff(id, ATTY_FLOAT)

Parameters

filename	raster map name
fbuf
ibuf
rows	number of rows
cols	number of cols

Definition at line 705 of file gs3.c.

◆ Gs_save_3dview()

int Gs_save_3dview	(	const char *	vname,
		geoview *	gv,
		geodisplay *	gd,
		struct Cell_head *	w,
		geosurf *	defsurf
	)

Save 3dview.

Parameters

vname	view name
gv	pointer to geoview struct
gd	pointer to geodisplay struct
w	current window
defsurf	default geosurf struct

Returns: -1 on error; ?

Definition at line 853 of file gs3.c.

References lightdefs::ambient, G_3dview::ambient, lightdefs::color, G_3dview::colorgrid, G_3dview::display_type, DM_COL_WIRE, DM_GOURAUD, DM_POLY, DM_WIRE, DM_WIRE_POLY, G_3dview::dozero, g_surf::draw_mode, G_3dview::exag, G_3dview::fov, geoview::fov, G_3dview::fringe, FROM, G_3dview::from_to, geoview::from_to, G_get_3dview_defaults(), G_mapset(), G_put_3dview(), GS_get_zrange(), GS_v3eq(), GS_v3mult(), gsd_model2real(), geoview::infocus, G_3dview::lightcol, G_3dview::lightpos, geoview::lights, G_3dview::lightson, G_3dview::mesh_freq, NULL, g_surf::nz_topo, G_3dview::pgm_id, G_3dview::poly_freq, lightdefs::position, geoview::real_to, geoview::scale, G_3dview::shading, lightdefs::shine, G_3dview::shine, G_3dview::surfonly, TO, G_3dview::twist, geoview::twist, geoview::vert_exag, W, X, g_surf::x_mod, g_surf::x_modw, Y, and Z.

Referenced by GS_save_3dview().

◆ Gs_update_attrange()

int Gs_update_attrange	(	geosurf *	gs,
		int	desc
	)

Update no_zero ranges for attribute (actually no_null now)

Parameters

gs	pointer to geosurf struct
desc	attribute id (descriptor)

Returns: -1 on error; 1 on success

Definition at line 1087 of file gs3.c.

References g_surf::att, ATT_TOPO, typbuff::cb, CF_COLOR_PACKED, g_surf::cols, CONST_ATT, gsurf_att::constant, typbuff::fb, G_debug(), gs_get_att_src(), gsds_get_changed(), gsds_get_typbuff(), gsurf_att::hdata, typbuff::ib, INIT_MINMAX, max, gsurf_att::max_nz, min, gsurf_att::min_nz, typbuff::nm, NULL, gsurf_att::range_nz, g_surf::rows, typbuff::sb, SET_MINMAX, g_surf::zmax, g_surf::zmax_nz, g_surf::zmin, g_surf::zmin_nz, g_surf::zminmasked, g_surf::zrange, and g_surf::zrange_nz.

Referenced by gs_set_att_const(), and GS_set_att_const().

Macros

Typedefs

Functions

Detailed Description

Macro Definition Documentation

◆ INIT_MINMAX

◆ NO_DATA_COL

◆ SET_MINMAX

Typedef Documentation

◆ FILEDESC

Function Documentation

◆ Gs_build_256lookup()

◆ Gs_distance()

◆ Gs_get_cat_label()

◆ Gs_load_3dview()

◆ Gs_loadmap_as_bitmap()

◆ Gs_loadmap_as_char()

◆ Gs_loadmap_as_float()

◆ Gs_loadmap_as_int()

◆ Gs_loadmap_as_short()

◆ Gs_numtype()

◆ Gs_pack_colors()

◆ Gs_pack_colors_float()

◆ Gs_save_3dview()

◆ Gs_update_attrange()