OGSF library - manipulating views (lower level functions) More...

#include <grass/config.h>
#include <grass/gstypes.h>
#include "math.h"

Include dependency graph for gsd_views.c:

Functions
int	gsd_get_los (float(*vect)[3], short sx, short sy)
	ADD. More...

void	gsd_set_view (geoview gv, geodisplay gd)
	Set view. More...

void	gsd_check_focus (geoview *gv)
	Check focus. More...

void	gsd_get_zup (geoview gv, double up)
	Get z-up vector (z-direction) More...

int	gsd_zup_twist (geoview *gv)
	ADD. More...

void	gsd_do_scale (int doexag)
	Set current scale. More...

void	gsd_real2model (Point3 point)
	Convert real to model coordinates. More...

void	gsd_model2real (Point3 point)
	Convert model to real coordinates. More...

void	gsd_model2surf (geosurf *gs, Point3 point)
	Convert model to surface coordinates. More...

void	gsd_surf2model (Point3 point)
	Convert surface to model coordinates. More...

void	gsd_surf2real (geosurf *gs, Point3 point)
	Convert surface to real coordinates. More...

void	gsd_real2surf (geosurf *gs, Point3 point)
	Convert real to surface coordinates. More...

Detailed Description

OGSF library - manipulating views (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 (January 1993); Doxygenized by Martin Landa <landa.martin gmail.com> (May 2008)

Definition in file gsd_views.c.

Function Documentation

void gsd_check_focus ( geoview * gv )

Check focus.

Parameters

gv	view (geoview)

Definition at line 215 of file gsd_views.c.

References FROM, GS_get_zrange(), GS_v3eq(), GS_v3mult(), and GS_v3normalize().

Referenced by gsd_set_view().

void gsd_do_scale ( int doexag )

Set current scale.

Parameters

doexag use z-exaggeration

Definition at line 355 of file gsd_views.c.

References GS_get_scale(), GS_get_zrange(), gsd_scale(), gsd_translate(), max, and min.

Referenced by gpd_2dsite(), gpd_3dsite(), GS_draw_lighting_model1(), GS_draw_line_onsurf(), GS_draw_nline_onsurf(), GS_draw_X(), GS_set_Narrow(), gsd_coarse_surf_map(), gsd_draw_cplane(), gsd_fringe_horiz_line(), gsd_fringe_horiz_line2(), gsd_fringe_horiz_poly(), gsd_fringe_vert_line(), gsd_fringe_vert_poly(), gsd_get_los(), gsd_getwindow(), gsd_norm_arrows(), gsd_north_arrow(), gsd_ortho_wall(), gsd_scalebar(), gsd_scalebar_v2(), gsd_surf_const(), gsd_surf_map(), gsd_surf_map_old(), gsd_triangulated_wall(), gsd_wire_arrows(), gsd_wire_surf_const(), gsd_wire_surf_map(), gvd_vect(), gvld_isosurf(), gvld_slices(), gvld_wind3_box(), and gvld_wire_slices().

int gsd_get_los	(	float(*)	vect[3],
		short	sx,
		short	sy
	)

ADD.

Parameters

vect
sx,sy	screen coordinates

Returns: 1

Definition at line 40 of file gsd_views.c.

References FROM, GS_ready_draw(), gsd_color_func(), gsd_do_scale(), gsd_linewidth(), X, and Y.

Referenced by GS_get_selected_point_on_surface(), GS_look_here(), and Nviz_set_cplane_here().

void gsd_get_zup	(	geoview *	gv,
		double *	up
	)

Get z-up vector (z-direction)

Parameters

gv	view (geoview)
up	up vector

Definition at line 239 of file gsd_views.c.

References FROM, GS_v3dir(), X, and Y.

Referenced by gsd_set_view().

void gsd_model2real ( Point3 point )

Convert model to real coordinates.

Parameters

point[in,out] 3d point (x,y,z)

Definition at line 393 of file gsd_views.c.

References GS_get_region(), GS_get_scale(), GS_get_zrange(), max, min, n, dialogs::s, dialogs::w, X, and Y.

Referenced by GS_get_from_real(), and Gs_save_3dview().

void gsd_model2surf	(	geosurf *	gs,
		Point3	point
	)

Convert model to surface coordinates.

Parameters

gs	surface (geosurf)
point	3d point (Point3)

Definition at line 414 of file gsd_views.c.

References GS_get_scale(), GS_get_zrange(), max, min, X, and Y.

void gsd_real2model ( Point3 point )

Convert real to model coordinates.

Parameters

point[in,out] 3d point (Point3)

Definition at line 373 of file gsd_views.c.

References GS_get_region(), GS_get_scale(), GS_get_zrange(), max, min, n, dialogs::s, dialogs::w, X, and Y.

Referenced by GS_moveto_real().

void gsd_real2surf	(	geosurf *	gs,
		Point3	point
	)

Convert real to surface coordinates.

Parameters

	gs	surface (geosurf)
[in,out]	point	3d point (Point3)

Definition at line 480 of file gsd_views.c.

References X, and Y.

Referenced by GS_get_cat_at_xy(), GS_get_distance_alongsurf(), GS_get_norm_at_xy(), and GS_get_val_at_xy().

void gsd_set_view	(	geoview *	gv,
		geodisplay *	gd
	)

Set view.

Establishes viewing & projection matrices

Parameters

gv	view (geoview)
dp	display (geodisplay)

Definition at line 146 of file gsd_views.c.

References FROM, GS_get_aspect(), gs_get_datacenter(), gsd_check_focus(), gsd_get_zup(), gsd_surf2model(), gsd_update_cplanes(), tools::pos, X, and Y.

Referenced by GS_ready_draw(), GS_set_focus(), GS_set_focus_real(), and GS_set_viewdir().

void gsd_surf2model ( Point3 point )

Convert surface to model coordinates.

Parameters

point 3d point (Point3)

Definition at line 441 of file gsd_views.c.

References GS_get_scale(), GS_get_zrange(), max, min, X, and Y.

Referenced by gsd_set_view().

void gsd_surf2real	(	geosurf *	gs,
		Point3	point
	)

Convert surface to real coordinates.

Parameters

	gs	surface (geosurf)
[in,out]	point	3d point (Point3)

Definition at line 464 of file gsd_views.c.

References X, and Y.

Referenced by GS_draw_nline_onsurf(), and GS_get_selected_point_on_surface().

int gsd_zup_twist ( geoview * gv )

ADD.

Parameters

gv	view (geoview)

Returns: ?

Definition at line 274 of file gsd_views.c.

References FROM, GS_distance(), GS_v3eq(), X, and Y.

Functions

Detailed Description

Function Documentation