nviz/draw.c File Reference

Nviz library – Draw map objects to GLX context. More...

#include <grass/nviz.h>

Include dependency graph for nviz/draw.c:

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. More...
int	Nviz_draw_all_vect (void)
	Draw all loaded vector sets (lines) More...
int	Nviz_draw_all_site (void)
	Draw all loaded vector point sets. More...
int	Nviz_draw_all_vol (void)
	Draw all loaded volume sets. More...
int	Nviz_draw_all (nv_data *data)
	Draw all map objects (in full resolution) and decorations. More...
int	Nviz_draw_quick (nv_data *data, int draw_mode)
	Draw all surfaces in wireframe (quick mode) More...
int	Nviz_load_image (GLubyte *image_data, int width, int height, int alpha)
	Load image into texture. More...
void	Nviz_set_2D (int width, int height)
	Set ortho view for drawing images. More...
void	Nviz_draw_image (int x, int y, int width, int height, int texture_id)
	Draw image as texture. More...
void	Nviz_del_texture (int texture_id)
	Delete texture. More...
void	Nviz_get_max_texture (int *size)
	Get maximum texture size. More...

Detailed Description

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.

Author

Updated/modified by Martin Landa <landa.martin gmail.com> (Google SoC 2008/2010)

Textures by Anna Kratochvilova

Definition in file nviz/draw.c.

Macro Definition Documentation

GL_CLAMP_TO_EDGE

#define GL_CLAMP_TO_EDGE   0x812F

Definition at line 20 of file nviz/draw.c.

Function Documentation

Nviz_del_texture()

void Nviz_del_texture

(

int

texture_id

)

Delete texture.

Parameters

texture_id

texture id

Definition at line 408 of file nviz/draw.c.

References t.

Nviz_draw_all()

int Nviz_draw_all

(

nv_data *

data

)

Draw all map objects (in full resolution) and decorations.

Parameters

data

nviz data

Definition at line 204 of file nviz/draw.c.

Nviz_draw_all_site()

int Nviz_draw_all_site

(

void

)

Draw all loaded vector point sets.

Returns

1

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.

Nviz_draw_all_surf()

int Nviz_draw_all_surf

(

nv_data *

dc

)

Draw all loaded surfaces.

Parameters

dc

nviz data

Returns

1

Definition at line 32 of file nviz/draw.c.

References GS_get_surf_list(), nv_data::light, MAX_SURFS, x, light_data::x, light_data::y, and light_data::z.

Nviz_draw_all_vect()

int Nviz_draw_all_vect

(

void

)

Draw all loaded vector sets (lines)

Returns

1

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().

Nviz_draw_all_vol()

int Nviz_draw_all_vol

(

void

)

Draw all loaded volume sets.

Returns

1

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().

Nviz_draw_image()

void Nviz_draw_image	(	int	x,
		int	y,
		int	width,
		int	height,
		int	texture_id
	)

Draw image as texture.

Parameters

x,y	image coordinates
width,height	image size
texture_id	texture id

Definition at line 379 of file nviz/draw.c.

Nviz_draw_quick()

int Nviz_draw_quick	(	nv_data *	data,
		int	draw_mode
	)

Draw all surfaces in wireframe (quick mode)

Draw modes:

• DRAW_QUICK_SURFACE
• DRAW_QUICK_VLINES
• DRAW_QUICK_VPOINTS
• DRAW_QUICK_VOLUME

Parameters

data	nviz data
draw_mode	draw mode

Returns

1

Definition at line 279 of file nviz/draw.c.

Nviz_get_max_texture()

void Nviz_get_max_texture

(

int *

size

)

Get maximum texture size.

Definition at line 420 of file nviz/draw.c.

Nviz_load_image()

int Nviz_load_image	(	GLubyte *	image_data,
		int	width,
		int	height,
		int	alpha
	)

Load image into texture.

Parameters

image_data	image data
width,height	image screen size
alpha	has alpha channel

Definition at line 316 of file nviz/draw.c.

Nviz_set_2D()

void Nviz_set_2D	(	int	width,
		int	height
	)

Set ortho view for drawing images.

Parameters

width,height

image screen size

Definition at line 355 of file nviz/draw.c.