GRASS GIS 8 Programmer's Manual 8.4.1(2025)-45ca3179ab
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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.
 
void gpd_obj (geosurf *gs, gvstyle *style, Point3 pt)
 Draw point representing object.
 
int gpd_2dsite (geosite *gp, geosurf *gs, int do_fast UNUSED)
 Draw 2D point set.
 
int gpd_3dsite (geosite *gp, float xo, float yo, int do_fast UNUSED)
 Draw 3D point set.
 

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.

Referenced by gpd_2dsite(), gpd_3dsite(), and gvd_vect().

◆ 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
gpsite (geosite)
gssurface (geosurf)
do_fast(unused)
Returns
0 on failure
1 on success

Definition at line 215 of file gpd.c.

References CHK_FREQ, gpd_obj(), GS_check_cancel(), gs_get_att_src(), gs_get_att_typbuff(), gs_point_in_region(), gs_point_is_masked(), gs_update_curmask(), gsd_checkpoint(), gsd_do_scale(), gsd_getwindow(), gsd_linewidth(), gsd_popmatrix(), gsd_pushmatrix(), gsd_translate(), NULL, viewcell_tri_interp(), X, and Y.

Referenced by GP_draw_site().

◆ gpd_3dsite()

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

Draw 3D point set.

Parameters
gpsite (geosite)
xo,yo
do_fast(unused)
Returns
0 on success
1 on failure

Definition at line 312 of file gpd.c.

References CHK_FREQ, gpd_obj(), GS_check_cancel(), GS_global_exag(), gsd_checkpoint(), gsd_do_scale(), gsd_getwindow(), gsd_linewidth(), gsd_popmatrix(), gsd_pushmatrix(), NULL, X, and Y.

Referenced by GP_draw_site().

◆ 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
gssurface (geosurf)
styleobject displaying style (highlighted or not)
pt3d point (Point3)

Definition at line 70 of file gpd.c.

References 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(), and gsd_x().

Referenced by gpd_2dsite(), gpd_3dsite(), and GS_draw_X().

◆ 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
gssurface (geosurf)
ptpoint (array(X,Y,Z))
regionregion settings (array (top,bottom,left,right))
Returns
0 point outside of region
1 point inside region

Definition at line 39 of file gpd.c.

References VCOL2X, VCOLS, VROW2Y, VROWS, X, and Y.

Referenced by gpd_2dsite().