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GRASS 8 Programmer's Manual 8.6.0dev(2026)-f6f2c534ea
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Nviz library – Draw map objects to GLX context. More...
#include <grass/nviz.h>
Go to the source code of this file.
Macros | |
| #define | GL_CLAMP_TO_EDGE 0x812F |
Functions | |
| int | Nviz_draw_all_surf (nv_data *dc) |
| Draw all loaded surfaces. | |
| int | Nviz_draw_all_vect (void) |
| Draw all loaded vector sets (lines) | |
| int | Nviz_draw_all_site (void) |
| Draw all loaded vector point sets. | |
| int | Nviz_draw_all_vol (void) |
| Draw all loaded volume sets. | |
| int | Nviz_draw_all (nv_data *data) |
| Draw all map objects (in full resolution) and decorations. | |
| int | Nviz_draw_quick (nv_data *data, int draw_mode) |
| Draw all surfaces in wireframe (quick mode) | |
| int | Nviz_load_image (GLubyte *image_data, int width, int height, int alpha) |
| Load image into texture. | |
| void | Nviz_set_2D (int width, int height) |
| Set ortho view for drawing images. | |
| void | Nviz_draw_image (int x, int y, int width, int height, int texture_id) |
| Draw image as texture. | |
| void | Nviz_del_texture (int texture_id) |
| Delete texture. | |
| void | Nviz_get_max_texture (int *size) |
| Get maximum texture size. | |
Nviz library – Draw map objects to GLX context.
Based on visualization/nviz/src/draw.c and visualization/nviz/src/togl_flythrough.c
(C) 2008, 2010-2011 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.
Definition in file nviz/draw.c.
| #define GL_CLAMP_TO_EDGE 0x812F |
Definition at line 20 of file nviz/draw.c.
Delete texture.
| texture_id | texture id |
Definition at line 408 of file nviz/draw.c.
References t.
Draw all map objects (in full resolution) and decorations.
| data | nviz data |
Definition at line 204 of file nviz/draw.c.
References nv_data::arrow, nv_data::bgcolor, fringe_data::color, scalebar_data::color, nv_data::draw_arrow, fringe_data::elev, nv_data::fringe, GS_clear(), GS_done_draw(), GS_draw_fringe(), GS_ready_draw(), GS_set_draw(), GSD_BACK, gsd_north_arrow(), gsd_scalebar_v2(), fringe_data::id, nv_data::num_fringes, nv_data::num_scalebars, Nviz_draw_all_site(), Nviz_draw_all_surf(), Nviz_draw_all_vect(), Nviz_draw_all_vol(), nv_data::scalebar, scalebar_data::size, scalebar_data::where, and fringe_data::where.
Draw all loaded vector point sets.
Definition at line 146 of file nviz/draw.c.
References G_free(), GP_draw_site(), GP_get_site_list(), GS_done_draw(), GS_ready_draw(), GS_set_draw(), GSD_BACK, and GSD_BOTH.
Referenced by Nviz_draw_all().
Draw all loaded surfaces.
| dc | nviz data |
Definition at line 32 of file nviz/draw.c.
References G_free(), GS_draw_cplane_fence(), GS_draw_surf(), GS_get_surf_list(), GS_setlight_position(), MAX_CPLANES, MAX_SURFS, and x.
Referenced by Nviz_draw_all().
Draw all loaded vector sets (lines)
Definition at line 121 of file nviz/draw.c.
References GS_done_draw(), GS_ready_draw(), GS_set_draw(), GSD_BACK, GSD_BOTH, and GV_alldraw_vect().
Referenced by Nviz_draw_all().
Draw all loaded volume sets.
Definition at line 175 of file nviz/draw.c.
References G_free(), GS_done_draw(), GS_ready_draw(), GS_set_draw(), GSD_BACK, GSD_BOTH, GVL_draw_vol(), and GVL_get_vol_list().
Referenced by Nviz_draw_all().
Draw image as texture.
| x,y | image coordinates |
| width,height | image size |
| texture_id | texture id |
Definition at line 379 of file nviz/draw.c.
References GS_done_draw(), GS_set_draw(), GSD_FRONT, and x.
Draw all surfaces in wireframe (quick mode)
Draw modes:
| data | nviz data |
| draw_mode | draw mode |
Definition at line 281 of file nviz/draw.c.
References nv_data::bgcolor, DRAW_QUICK_SURFACE, DRAW_QUICK_VLINES, DRAW_QUICK_VOLUME, DRAW_QUICK_VPOINTS, GP_alldraw_site(), GS_alldraw_wire(), GS_clear(), GS_done_draw(), GS_ready_draw(), GS_set_draw(), GSD_BACK, GV_alldraw_vect(), and GVL_alldraw_wire().
Get maximum texture size.
Definition at line 420 of file nviz/draw.c.
References scalebar_data::size.
Load image into texture.
| image_data | image data |
| width,height | image screen size |
| alpha | has alpha channel |
Definition at line 318 of file nviz/draw.c.
References GL_CLAMP_TO_EDGE.
Set ortho view for drawing images.
| width,height | image screen size |
Definition at line 355 of file nviz/draw.c.