Handles displaying backgrounds. More...

#include "background.h"
#include "array.h"
#include "camera.h"
#include "conf.h"
#include "gui.h"
#include "log.h"
#include "ndata.h"
#include "nlua.h"
#include "nlua_bkg.h"
#include "nlua_camera.h"
#include "nlua_colour.h"
#include "nlua_gfx.h"
#include "nlua_tex.h"
#include "ntracing.h"
#include "opengl.h"
#include "pause.h"
#include "player.h"
#include "rng.h"

Include dependency graph for background.c:

Go to the source code of this file.

Data Structures
struct	background_image_t
	Represents a background image like say a Nebula. More...

Macros
#define	STAR_BUF 250

Functions
static void	background_renderImages (background_image_t *bkg_arr)
	Renders the background images.
static nlua_env	background_create (const char *name)
	Creates a background Lua state from a script.
static void	background_clearCurrent (void)
	Destroys the current running background script.
static void	background_clearImgArr (background_image_t **arr)
	Clears a background image array.
static int	bkg_compare (const void p1, const void p2)
	Compares two different backgrounds and sorts them.
static void	bkg_sort (background_image_t *arr)
	Sorts the backgrounds by movement.
void	background_initDust (int n)
	Initializes background dust.
void	background_moveDust (double x, double y)
	Displaces the dust, useful with camera.
void	background_renderDust (const double dt)
	Renders the dustry background.
void	background_render (double dt)
	Render the background.
void	background_renderOverlay (double dt)
	Renders the background overlay.
unsigned int	background_addImage (const glTexture image, double x, double y, double move, double scale, double angle, const glColour col, int foreground, const glColour *radiosity)
	Adds a new background image.
int	background_init (void)
	Initializes the background system.
int	background_load (const char *name)
	Loads a background script by name.
void	background_clear (void)
	Cleans up the background stuff.
void	background_free (void)
	Cleans up and frees memory after the backgrounds.
glTexture **	background_getStarTextures (void)
	Returns an array (array.h) of star background images in the system background.
glTexture *	background_getAmbientTexture (void)
	Returns an overall background image (nebula, for instance), or NULL if none exists.

Variables
static background_image_t *	bkg_image_arr_bk
static background_image_t *	bkg_image_arr_ft
static unsigned int	bkg_idgen = 0
static nlua_env	bkg_cur_env = LUA_NOREF
	Backgrounds.
static nlua_env	bkg_def_env = LUA_NOREF
static int	bkg_L_renderbg = LUA_NOREF
static int	bkg_L_rendermg = LUA_NOREF
static int	bkg_L_renderfg = LUA_NOREF
static int	bkg_L_renderov = LUA_NOREF
static gl_vbo *	dust_vertexVBO = NULL
static unsigned int	ndust = 0
static GLfloat	dust_x = 0.
static GLfloat	dust_y = 0.

Detailed Description

Handles displaying backgrounds.

Definition in file background.c.

Macro Definition Documentation

◆ STAR_BUF

#define STAR_BUF 250

Area to leave around screen for dust, more = less repetition

Definition at line 74 of file background.c.

Function Documentation

◆ background_addImage()

unsigned int background_addImage	(	const glTexture *	image,
		double	x,
		double	y,
		double	move,
		double	scale,
		double	angle,
		const glColour *	col,
		int	foreground,
		const glColour *	radiosity )

Adds a new background image.

Definition at line 328 of file background.c.

◆ background_clear()

void background_clear ( void )

Cleans up the background stuff.

Definition at line 570 of file background.c.

◆ background_clearCurrent()

void background_clearCurrent ( void )

static

Destroys the current running background script.

Definition at line 551 of file background.c.

◆ background_clearImgArr()

void background_clearImgArr ( background_image_t ** arr )

static

Clears a background image array.

Parameters

arr	Array to clear.

Definition at line 588 of file background.c.

◆ background_create()

nlua_env background_create ( const char * path )

static

Creates a background Lua state from a script.

Definition at line 447 of file background.c.

◆ background_free()

void background_free ( void )

Cleans up and frees memory after the backgrounds.

Definition at line 602 of file background.c.

◆ background_getAmbientTexture()

glTexture * background_getAmbientTexture ( void )

Returns an overall background image (nebula, for instance), or NULL if none exists.

Todo: With current background scripts, this only does anything on the border (1 jump from nebula)!

Definition at line 644 of file background.c.

◆ background_getStarTextures()

glTexture ** background_getStarTextures ( void )

Returns an array (array.h) of star background images in the system background.

Definition at line 629 of file background.c.

◆ background_init()

int background_init ( void )

Initializes the background system.

Definition at line 492 of file background.c.

◆ background_initDust()

void background_initDust ( int n )

Initializes background dust.

Parameters

n	Number of dust to add (dust per 800x640 screen).

Definition at line 97 of file background.c.

◆ background_load()

int background_load ( const char * name )

Loads a background script by name.

Definition at line 502 of file background.c.

◆ background_moveDust()

void background_moveDust	(	double	x,
		double	y )

Displaces the dust, useful with camera.

Definition at line 145 of file background.c.

◆ background_render()

void background_render ( double dt )

Render the background.

Parameters

dt	Real delta ticks elapsed.

Definition at line 245 of file background.c.

◆ background_renderDust()

void background_renderDust ( const double dt )

Renders the dustry background.

Parameters

dt	Current delta tick.

Definition at line 156 of file background.c.

◆ background_renderImages()

void background_renderImages ( background_image_t * bkg_arr )

static

Renders the background images.

Definition at line 392 of file background.c.

◆ background_renderOverlay()

void background_renderOverlay ( double dt )

Renders the background overlay.

Definition at line 290 of file background.c.

◆ bkg_compare()

int bkg_compare	(	const void *	p1,
		const void *	p2 )

static

Compares two different backgrounds and sorts them.

Definition at line 310 of file background.c.

◆ bkg_sort()

void bkg_sort ( background_image_t * arr )

static

Sorts the backgrounds by movement.

Definition at line 320 of file background.c.

Variable Documentation

◆ bkg_cur_env

nlua_env bkg_cur_env = LUA_NOREF

static

Backgrounds.

Current Lua state.

Definition at line 64 of file background.c.

◆ bkg_def_env

nlua_env bkg_def_env = LUA_NOREF

static

Default Lua state.

Definition at line 65 of file background.c.

◆ bkg_idgen

unsigned int bkg_idgen = 0

static

ID generator for backgrounds.

Definition at line 59 of file background.c.

◆ bkg_image_arr_bk

background_image_t* bkg_image_arr_bk

static

Initial value:

=

NULL

Background image array to display (behind dust). Assumed to be a debris layer.

Definition at line 52 of file background.c.

◆ bkg_image_arr_ft

background_image_t* bkg_image_arr_ft

static

Initial value:

=

NULL

Background image array to display (in front of dust). Assumed to be a star layer.

Definition at line 55 of file background.c.

◆ bkg_L_renderbg

int bkg_L_renderbg = LUA_NOREF

static

Background rendering function.

Definition at line 66 of file background.c.

◆ bkg_L_renderfg

int bkg_L_renderfg = LUA_NOREF

static

Foreground rendering function.

Definition at line 68 of file background.c.

◆ bkg_L_rendermg

int bkg_L_rendermg = LUA_NOREF

static

Middleground rendering function.

Definition at line 67 of file background.c.

◆ bkg_L_renderov

int bkg_L_renderov = LUA_NOREF

static

Overlay rendering function.

Definition at line 69 of file background.c.

◆ dust_vertexVBO

gl_vbo* dust_vertexVBO = NULL

static

Star Vertex VBO.

Definition at line 76 of file background.c.

◆ dust_x

GLfloat dust_x = 0.

static

Star X movement.

Definition at line 78 of file background.c.

◆ dust_y

GLfloat dust_y = 0.

static

Star Y movement.

Definition at line 79 of file background.c.

◆ ndust

unsigned int ndust = 0

static

Total dust.

Definition at line 77 of file background.c.

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ STAR_BUF

Function Documentation

◆ background_addImage()

◆ background_clear()

◆ background_clearCurrent()

◆ background_clearImgArr()

◆ background_create()

◆ background_free()

◆ background_getAmbientTexture()

◆ background_getStarTextures()

◆ background_init()

◆ background_initDust()

◆ background_load()

◆ background_moveDust()

◆ background_render()

◆ background_renderDust()

◆ background_renderImages()

◆ background_renderOverlay()

◆ bkg_compare()

◆ bkg_sort()

Variable Documentation

◆ bkg_cur_env

◆ bkg_def_env

◆ bkg_idgen

◆ bkg_image_arr_bk

◆ bkg_image_arr_ft

◆ bkg_L_renderbg

◆ bkg_L_renderfg

◆ bkg_L_rendermg

◆ bkg_L_renderov

◆ dust_vertexVBO

◆ dust_x

◆ dust_y

◆ ndust