gpd.c File Reference

OGSF library - loading and manipulating point sets (lower level) More...

#include <stdlib.h>
#include <math.h>
#include <grass/ogsf.h>
#include "rowcol.h"

Include dependency graph for gpd.c:

Go to the source code of this file.

Macros
#define	CHK_FREQ   50
#define	v_border   50

Functions
int	gs_point_in_region (geosurf *gs, float *pt, float *region)
	Check if point is in region. More...
void	gpd_obj (geosurf *gs, gvstyle *style, Point3 pt)
	Draw point representing object. More...
int	gpd_2dsite (geosite *gp, geosurf *gs, int do_fast UNUSED)
	Draw 2D point set. More...
int	gpd_3dsite (geosite *gp, float xo, float yo, int do_fast UNUSED)
	Draw 3D point set. More...

Detailed Description

OGSF library - loading and manipulating point sets (lower level)

(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, GMSL/University of Illinois (December 1993)

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

Definition in file gpd.c.

Macro Definition Documentation

CHK_FREQ

#define CHK_FREQ   50

Definition at line 22 of file gpd.c.

v_border

#define v_border   50

Definition at line 25 of file gpd.c.

Function Documentation

gpd_2dsite()

int gpd_2dsite	(	geosite *	gp,
		geosurf *	gs,
		int do_fast	UNUSED
	)

Draw 2D point set.

Need to think about translations - If user translates surface, sites should automatically go with it, but translating sites should translate it relative to surface on which it's displayed

Handling mask checking here

Todo:

prevent scaling by 0

Parameters

gp	site (geosite)
gs	surface (geosurf)
do_fast	(unused)

Returns

0 on failure

1 on success

Definition at line 215 of file gpd.c.

gpd_3dsite()

int gpd_3dsite	(	geosite *	gp,
		float	xo,
		float	yo,
		int do_fast	UNUSED
	)

Draw 3D point set.

Parameters

gp	site (geosite)
xo,yo
do_fast	(unused)

Returns

0 on success

1 on failure

Definition at line 312 of file gpd.c.

gpd_obj()

void gpd_obj	(	geosurf *	gs,
		gvstyle *	style,
		Point3	pt
	)

Draw point representing object.

Do normal transforms before calling

Note gs: NULL if 3d obj or const elev surface

Parameters

gs	surface (geosurf)
style	object displaying style (highlighted or not)
pt	3d point (Point3)

Definition at line 70 of file gpd.c.

References CM_COLOR, CM_DIFFUSE, g_vect_style::color, GS_global_exag(), GS_v3eq(), gsd_box(), gsd_color_func(), gsd_colormode(), gsd_cube(), gsd_diamond(), gsd_draw_asterisk(), gsd_draw_box(), gsd_draw_gyro(), gsd_popmatrix(), gsd_pushmatrix(), gsd_scale(), gsd_sphere(), gsd_x(), g_vect_style::size, ST_ASTER, ST_BOX, ST_CUBE, ST_DIAMOND, ST_GYRO, ST_HISTOGRAM, ST_SPHERE, ST_X, g_vect_style::symbol, and Z.

gs_point_in_region()

int gs_point_in_region	(	geosurf *	gs,
		float *	pt,
		float *	region
	)

Check if point is in region.

Check for cancel every CHK_FREQ points

Parameters

gs	surface (geosurf)
pt	point (array(X,Y,Z))
region	region settings (array (top,bottom,left,right))

Returns

0 point outside of region

1 point inside region

Definition at line 39 of file gpd.c.