gsd_views.c File Reference

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

#include <grass/config.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <grass/ogsf.h>
#include "math.h"

Include dependency graph for gsd_views.c:

Go to the source code of this file.

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

(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 (January 1993)

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

Definition in file gsd_views.c.

Function Documentation

gsd_check_focus()

void gsd_check_focus

(

geoview *

gv

)

Check focus.

Parameters

gv	view (geoview)

Definition at line 216 of file gsd_views.c.

References FROM, geoview::from_to, GS_get_zrange(), GS_v3eq(), GS_v3mult(), GS_v3normalize(), geoview::infocus, geoview::real_to, geoview::scale, TO, geoview::vert_exag, and Z.

Referenced by gsd_set_view().

gsd_do_scale()

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 GS_draw_X(), GS_set_Narrow(), gsd_fringe_horiz_line(), gsd_fringe_horiz_line2(), gsd_fringe_horiz_poly(), gsd_fringe_vert_line(), gsd_fringe_vert_poly(), gsd_north_arrow(), gsd_scalebar(), gsd_scalebar_v2(), gsd_wire_arrows(), gsd_wire_surf_const(), gsd_wire_surf_map(), gvd_vect(), and gvld_wind3_box().

gsd_get_los()

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.

Referenced by GS_look_here().

gsd_get_zup()

void gsd_get_zup	(	geoview *	gv,
		double *	up
	)

Get z-up vector (z-direction)

Parameters

gv	view (geoview)
up	up vector

Definition at line 240 of file gsd_views.c.

References FROM, geoview::from_to, GS_v3dir(), TO, X, Y, and Z.

Referenced by gsd_set_view().

gsd_model2real()

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 max, and min.

Referenced by Gs_save_3dview().

gsd_model2surf()

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, Y, and Z.

gsd_real2model()

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 max, and min.

Referenced by GS_moveto_real().

gsd_real2surf()

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 481 of file gsd_views.c.

References g_surf::ox, g_surf::oy, X, and Y.

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

gsd_set_view()

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 geodisplay::aspect, georot::do_rot, geodisplay::farclip, geoview::fov, FROM, geoview::from_to, GS_get_aspect(), gs_get_datacenter(), gsd_check_focus(), gsd_get_zup(), gsd_surf2model(), gsd_update_cplanes(), geodisplay::nearclip, georot::rot_angle, georot::rot_axes, geoview::rotate, georot::rotMatrix, TO, geoview::twist, X, Y, and Z.

Referenced by GS_ready_draw().

gsd_surf2model()

void gsd_surf2model

(

Point3

point

)

Convert surface to model coordinates.

Parameters

point

3d point (Point3)

Definition at line 442 of file gsd_views.c.

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

Referenced by gsd_set_view().

gsd_surf2real()

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 465 of file gsd_views.c.

References g_surf::ox, g_surf::oy, X, and Y.

gsd_zup_twist()

int gsd_zup_twist

(

geoview *

gv

)

ADD.

Parameters

gv	view (geoview)

Returns

?

Definition at line 274 of file gsd_views.c.

References FROM, geoview::from_to, GS_distance(), GS_v3eq(), TO, geoview::twist, X, Y, and Z.