nebula.c File Reference

Handles rendering and generating the nebula. More...

#include "nebula.h"
#include "camera.h"
#include "conf.h"
#include "gui.h"
#include "log.h"
#include "menu.h"
#include "opengl.h"
#include "player.h"
#include "rng.h"
#include "spfx.h"
#include "vec2.h"

Go to the source code of this file.

Data Structures
struct	NebulaPuff
	Represents a nebula puff. More...

Macros
#define	NEBULA_PUFF_BUFFER   300

Functions
static void	nebu_renderPuffs (int below_player)
	Renders the puffs.
static void	nebu_renderBackground (const double dt)
	Renders the nebula using the multitexture approach.
static void	nebu_blitFBO (void)
	If we're drawing the nebula buffered, copy to the screen.
int	nebu_init (void)
	Initializes the nebula.
int	nebu_resize (void)
	Handles a screen s.
double	nebu_getSightRadius (void)
	Gets the nebula view radius.
void	nebu_exit (void)
	Cleans up the nebu subsystem.
void	nebu_render (const double dt)
	Renders the nebula.
void	nebu_update (double dt)
	Updates visibility and stuff.
void	nebu_renderOverlay (const double dt)
	Renders the nebula overlay (hides what player can't see).
void	nebu_prep (double density, double volatility, double hue)
	Prepares the nebualae to be rendered.

Variables
static double	nebu_hue = 0.
static double	nebu_density = 0.
static double	nebu_dx = 0.
static double	nebu_view = 0.
static double	nebu_dt = 0.
static double	nebu_time = 0.
static double	nebu_scale = 4.
static int	nebu_dofbo = 0
static GLuint	nebu_fbo = GL_INVALID_VALUE
static GLuint	nebu_tex = GL_INVALID_VALUE
static GLfloat	nebu_render_w = 0.
static GLfloat	nebu_render_h = 0.
static mat4	nebu_render_P
static NebulaPuff *	nebu_puffs = NULL
static int	nebu_npuffs = 0
static double	puff_x = 0.
static double	puff_y = 0.

Detailed Description

Handles rendering and generating the nebula.

Definition in file nebula.c.

Macro Definition Documentation

NEBULA_PUFF_BUFFER

#define NEBULA_PUFF_BUFFER   300

Nebula buffer

Definition at line 26 of file nebula.c.

Function Documentation

nebu_blitFBO()

static void nebu_blitFBO ( void )

static

If we're drawing the nebula buffered, copy to the screen.

Definition at line 191 of file nebula.c.

nebu_exit()

void nebu_exit

(

void

)

Cleans up the nebu subsystem.

Definition at line 134 of file nebula.c.

nebu_getSightRadius()

double nebu_getSightRadius

(

void

)

Gets the nebula view radius.

Returns

The nebula view radius.

Definition at line 126 of file nebula.c.

nebu_init()

int nebu_init

(

void

)

Initializes the nebula.

Returns

0 on success.

Definition at line 76 of file nebula.c.

nebu_prep()

void nebu_prep	(	double	density,
		double	volatility,
		double	hue )

Prepares the nebualae to be rendered.

Parameters

density	Density of the nebula (0-1000).
volatility	Volatility of the nebula.
hue	Hue of the nebula (0-1).

Definition at line 379 of file nebula.c.

nebu_render()

void nebu_render

(

const double

dt

)

Renders the nebula.

Parameters

dt	Current delta tick.

Definition at line 147 of file nebula.c.

nebu_renderBackground()

static void nebu_renderBackground ( const double dt )

static

Renders the nebula using the multitexture approach.

Parameters

dt	Current delta tick.

Definition at line 158 of file nebula.c.

nebu_renderOverlay()

void nebu_renderOverlay

(

const double

dt

)

Renders the nebula overlay (hides what player can't see).

Parameters

dt	Current delta tick.

Definition at line 271 of file nebula.c.

nebu_renderPuffs()

static void nebu_renderPuffs ( int below_player )

static

Renders the puffs.

Parameters

below_player

Render the puffs below player or above player?

Definition at line 325 of file nebula.c.

nebu_resize()

int nebu_resize

(

void

)

Handles a screen s.

Returns

0 on success.

Definition at line 87 of file nebula.c.

nebu_update()

void nebu_update

(

double

dt

)

Updates visibility and stuff.

Definition at line 224 of file nebula.c.

Variable Documentation

nebu_density

double nebu_density = 0.

static

The density.

Definition at line 30 of file nebula.c.

nebu_dofbo

int nebu_dofbo = 0

static

Definition at line 38 of file nebula.c.

nebu_dt

double nebu_dt = 0.

static

How fast nebula changes.

Definition at line 33 of file nebula.c.

nebu_dx

double nebu_dx = 0.

static

Length scale (space coords) for turbulence/eddies we draw.

Definition at line 31 of file nebula.c.

nebu_fbo

GLuint nebu_fbo = GL_INVALID_VALUE

static

Definition at line 39 of file nebula.c.

nebu_hue

double nebu_hue = 0.

static

The hue.

Definition at line 29 of file nebula.c.

nebu_npuffs

int nebu_npuffs = 0

static

Number of puffs.

Definition at line 58 of file nebula.c.

nebu_puffs

NebulaPuff* nebu_puffs = NULL

static

Stack of puffs.

Definition at line 57 of file nebula.c.

nebu_render_h

GLfloat nebu_render_h = 0.

static

Definition at line 42 of file nebula.c.

nebu_render_P

mat4 nebu_render_P

static

Definition at line 43 of file nebula.c.

nebu_render_w

GLfloat nebu_render_w = 0.

static

Definition at line 41 of file nebula.c.

nebu_scale

double nebu_scale = 4.

static

How much to scale nebula.

Definition at line 37 of file nebula.c.

nebu_tex

GLuint nebu_tex = GL_INVALID_VALUE

static

Definition at line 40 of file nebula.c.

nebu_time

double nebu_time = 0.

static

Elapsed time since entering system.

Definition at line 34 of file nebula.c.

nebu_view

double nebu_view = 0.

static

How far player can see.

Definition at line 32 of file nebula.c.

puff_x

double puff_x = 0.

static

Definition at line 59 of file nebula.c.

puff_y

double puff_y = 0.

static

Definition at line 60 of file nebula.c.