gsd_surf.c File Reference

OGSF library - loading and manipulating surfaces. More...

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

Include dependency graph for gsd_surf.c:

Go to the source code of this file.

Macros
#define	DEBUG_ARROW   (0)
#define	SET_SCOLOR(sf)
	MACROS for use in gsd_ortho_wall ONLY !!! More...

Functions
int	gsd_surf (geosurf *surf)
	ADD. More...
int	gsd_surf_map_old (geosurf *surf)
	ADD. More...
int	gsd_surf_const (geosurf *surf, float k)
	Using tmesh - not confident with qstrips portability. More...
int	gsd_surf_func (geosurf *gs, int(*user_func)())
	Define user function. More...
int	gsd_triangulated_wall (int npts1, int npts2, geosurf *surf1, geosurf *surf2, Point3 *points1, Point3 *points2, float *norm)
	ADD. More...
void	gsd_setfc (int mode)
	ADD. More...
int	gsd_getfc (void)
	ADD. More...
int	gsd_ortho_wall (int np, int ns, geosurf **gsurfs, Point3 **points, float *norm)
	ADD. More...
int	gsd_wall (float *bgn, float *end, float *norm)
	ADD. More...
int	gsd_norm_arrows (geosurf *surf)
	ADD. More...
int	gsd_surf_map (geosurf *surf)
	Draw surface using triangle fan instead of strip. More...

Detailed Description

OGSF library - loading and manipulating surfaces.

GRASS OpenGL gsurf OGSF Library

(C) 1999-2008 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 (October 1993)

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

Definition in file gsd_surf.c.

Macro Definition Documentation

DEBUG_ARROW

#define DEBUG_ARROW   (0)

Definition at line 41 of file gsd_surf.c.

SET_SCOLOR

#define SET_SCOLOR

(

sf

)

Value:

if(check_color[sf]) \
            { \
                tx = points[sf][i][X] - gsurfs[sf]->x_trans; \
                ty = points[sf][i][Y] - gsurfs[sf]->y_trans; \
                offset = XY2OFF(gsurfs[sf], tx, ty); \
                colors[sf] = gs_mapcolor(cobuf[sf], coloratt[sf], offset); \
            }

MACROS for use in gsd_ortho_wall ONLY !!!

Definition at line 46 of file gsd_surf.c.

Function Documentation

gsd_getfc()

int gsd_getfc

(

void

)

ADD.

Returns

Definition at line 1220 of file gsd_surf.c.

Referenced by GS_get_fencecolor(), and GS_transp_is_set().

gsd_norm_arrows()

int gsd_norm_arrows

(

geosurf *

surf

)

ADD.

Need to do Zexag scale of normal for arrow direction, drawing routine unexags z for arrow

Parameters

surf	surface (geosurf)

Returns

Definition at line 1810 of file gsd_surf.c.

Referenced by gsd_surf().

gsd_ortho_wall()

int gsd_ortho_wall	(	int	np,
		int	ns,
		geosurf **	gsurfs,
		Point3 **	points,
		float *	norm
	)

ADD.

Parameters

np
ns
gsurfs
points
norm

Returns

Definition at line 1327 of file gsd_surf.c.

gsd_setfc()

void gsd_setfc

(

int

mode

)

ADD.

Parameters

mode

Definition at line 1208 of file gsd_surf.c.

gsd_surf()

int gsd_surf

(

geosurf *

surf

)

ADD.

Parameters

surf	surface (geosurf)

Returns

-1 on error

Definition at line 81 of file gsd_surf.c.

References g_surf::att, ATT_TOPO, CONST_ATT, gsurf_att::constant, FUNC_ATT, G_debug(), gs_calc_normals(), gs_get_att_src(), gsd_norm_arrows(), gsd_surf_const(), gsd_surf_func(), gsd_surf_map(), g_surf::gsurf_id, MAP_ATT, NOTSET_ATT, and gsurf_att::user_func.

Referenced by GS_draw_surf().

gsd_surf_const()

int gsd_surf_const	(	geosurf *	surf,
		float	k
	)

Using tmesh - not confident with qstrips portability.

Todo:

FIX: do_diff won't work right - needs normals - maybe calculate on the fly

Parameters

surf	surface (geosurf)
k

Returns

Definition at line 729 of file gsd_surf.c.

Referenced by gsd_surf().

gsd_surf_func()

int gsd_surf_func	(	geosurf *	gs,
		int(*)()	user_func
	)

Define user function.

Not yet supported

Parameters

gs	surface (geosurf)
user_func	user function

Returns

1

Definition at line 1092 of file gsd_surf.c.

Referenced by gsd_surf().

gsd_surf_map()

int gsd_surf_map

(

geosurf *

surf

)

Draw surface using triangle fan instead of strip.

Optimized by getting rid of BM_get mask check - GET_MAPPATT does same and returns zero if masked

Only do in window check on Fan center(v0) to further optimize – this runs the risk of trimming points in view !!

Parameters

surf	surface (geosurf)

Returns

Definition at line 2062 of file gsd_surf.c.

Referenced by gsd_surf().

gsd_surf_map_old()

int gsd_surf_map_old

(

geosurf *

surf

)

ADD.

Using tmesh - not confident with qstrips portability

Parameters

surf	surface (geosurf)

Returns

Definition at line 140 of file gsd_surf.c.

gsd_triangulated_wall()

int gsd_triangulated_wall	(	int	npts1,
		int	npts2,
		geosurf *	surf1,
		geosurf *	surf2,
		Point3 *	points1,
		Point3 *	points2,
		float *	norm
	)

ADD.

Parameters

npts1
npts2
surf1	first surface (geosurf)
surf2	second surface (geosurf)
points1
points2
norm

Returns

1

Definition at line 1111 of file gsd_surf.c.

gsd_wall()

int gsd_wall	(	float *	bgn,
		float *	end,
		float *	norm
	)

ADD.

bgn,end should already be in world modeling coords, but have to be reverse-translated to apply to each surface

Parameters

bgn,end	2d line for cutting plane
norm	indicates which way wall faces

Returns

Definition at line 1715 of file gsd_surf.c.