Banjo API: physics_particle.c File Reference

Banjo API 1.0.0-rc.2

Low-level C99 game development API

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#include <banjo/app.h>
#include <banjo/main.h>
#include <banjo/assert.h>
#include <banjo/bitmap.h>
#include <banjo/draw.h>
#include <banjo/event.h>
#include <banjo/log.h>
#include <banjo/mat.h>
#include <banjo/physics.h>
#include <banjo/physics_2d.h>
#include <banjo/pixel.h>
#include <banjo/system.h>
#include <banjo/time.h>
#include <banjo/vec.h>
#include <banjo/window.h>
#include <stdlib.h>

Include dependency graph for physics_particle.c:

Go to the source code of this file.

Data Structures
struct	planet_t

Macros
#define	SCREEN_WIDTH 800
#define	SCREEN_HEIGHT 600
#define	CANVAS_WIDTH SCREEN_WIDTH
#define	CANVAS_HEIGHT SCREEN_HEIGHT
#define	FB_PIXEL_MODE BJ_PIXEL_MODE_XRGB8888
#define	G_SUN BJ_F(120.0)
#define	SOFTENING BJ_F(6.0)
#define	M_SUN BJ_F(1000.0)
#define	M_MERCURY BJ_F(0.055)
#define	M_VENUS BJ_F(0.815)
#define	M_EARTH BJ_F(1.0)
#define	M_MARS BJ_F(0.107)
#define	M_JUPITER BJ_F(317.8)
#define	N_PLANETS 5
#define	N_ASTEROIDS 800

Functions
static void	on_draw (struct bj_window , struct bj_render_target , const struct bj_rect , void )
static void	update_projection ()
static bj_real	orbital_speed_soft (bj_real G, bj_real M, bj_real r, bj_real eps)
static void	init_sun ()
static void	init_planet (planet_t *p, bj_real r, bj_real mass, uint32_t color, bj_real draw_r, bj_real phase)
static void	init_asteroids ()
static void	initialize ()
static void	physics (bj_real dt)
static void	draw (bj_bitmap *framebuffer)
static void *	setup (struct bj_app app, void init_data)
static void	fixed_step (struct bj_app app, struct bj_tick_info tick, void user_data)
static void	step (struct bj_app app, struct bj_tick_info tick, void user_data)
static void	teardown (struct bj_app app, void user_data)
int	main (int argc, char *argv[])

Variables
bj_window *	window = 0
bj_mat3x3	projection
planet_t	planets [5]
bj_particle_2d	sun = {0}
bj_particle_2d	asteroids [800]
uint32_t	asteroid_color

Data Structure Documentation

◆ planet_t

struct planet_t

Examples: physics_particle.c.

Definition at line 66 of file physics_particle.c.

Collaboration diagram for planet_t:

Data Fields
bj_particle_2d	body
uint32_t	color
bj_real	radius

Macro Definition Documentation

◆ CANVAS_HEIGHT

#define CANVAS_HEIGHT SCREEN_HEIGHT

Examples: physics_particle.c.

Definition at line 40 of file physics_particle.c.

Referenced by update_projection().

◆ CANVAS_WIDTH

#define CANVAS_WIDTH SCREEN_WIDTH

Examples: physics_particle.c.

Definition at line 39 of file physics_particle.c.

Referenced by update_projection().

◆ FB_PIXEL_MODE

#define FB_PIXEL_MODE BJ_PIXEL_MODE_XRGB8888

Definition at line 42 of file physics_particle.c.

◆ G_SUN

#define G_SUN BJ_F(120.0)

Examples: physics_particle.c.

Definition at line 54 of file physics_particle.c.

Referenced by init_asteroids(), init_planet(), and physics().

◆ M_EARTH

#define M_EARTH BJ_F(1.0)

Examples: physics_particle.c.

Definition at line 59 of file physics_particle.c.

Referenced by initialize().

◆ M_JUPITER

#define M_JUPITER BJ_F(317.8)

Examples: physics_particle.c.

Definition at line 61 of file physics_particle.c.

Referenced by initialize().

◆ M_MARS

#define M_MARS BJ_F(0.107)

Examples: physics_particle.c.

Definition at line 60 of file physics_particle.c.

Referenced by initialize().

◆ M_MERCURY

#define M_MERCURY BJ_F(0.055)

Examples: physics_particle.c.

Definition at line 57 of file physics_particle.c.

Referenced by initialize().

◆ M_SUN

#define M_SUN BJ_F(1000.0)

Examples: physics_particle.c.

Definition at line 56 of file physics_particle.c.

Referenced by init_asteroids(), init_planet(), and init_sun().

◆ M_VENUS

#define M_VENUS BJ_F(0.815)

Examples: physics_particle.c.

Definition at line 58 of file physics_particle.c.

Referenced by initialize().

◆ N_ASTEROIDS

#define N_ASTEROIDS 800

Examples: physics_particle.c.

Definition at line 76 of file physics_particle.c.

Referenced by draw(), init_asteroids(), and physics().

◆ N_PLANETS

#define N_PLANETS 5

Examples: physics_particle.c.

Definition at line 72 of file physics_particle.c.

Referenced by draw(), and physics().

◆ SCREEN_HEIGHT

#define SCREEN_HEIGHT 600

Definition at line 38 of file physics_particle.c.

◆ SCREEN_WIDTH

#define SCREEN_WIDTH 800

Definition at line 37 of file physics_particle.c.

◆ SOFTENING

#define SOFTENING BJ_F(6.0)

Examples: physics_particle.c.

Definition at line 55 of file physics_particle.c.

Referenced by init_asteroids(), init_planet(), and physics().

Function Documentation

◆ draw()

void draw ( bj_bitmap * framebuffer )

static

Definition at line 194 of file physics_particle.c.

◆ fixed_step()

void fixed_step	(	struct bj_app *	app,
		struct bj_tick_info	tick,
		void *	user_data )

static

Definition at line 257 of file physics_particle.c.

◆ init_asteroids()

void init_asteroids ( )

static

Examples: physics_particle.c.

Definition at line 125 of file physics_particle.c.

Referenced by initialize().

◆ init_planet()

void init_planet	(	planet_t *	p,
		bj_real	r,
		bj_real	mass,
		uint32_t	color,
		bj_real	draw_r,
		bj_real	phase )

static

Examples: physics_particle.c.

Definition at line 108 of file physics_particle.c.

Referenced by initialize().

◆ init_sun()

void init_sun ( )

static

Examples: physics_particle.c.

Definition at line 97 of file physics_particle.c.

Referenced by initialize().

◆ initialize()

void initialize ( )

static

Examples: physics_particle.c.

Definition at line 147 of file physics_particle.c.

Referenced by setup().

◆ main()

int main	(	int	argc,
		char *	argv[] )

Definition at line 278 of file physics_particle.c.

◆ on_draw()

void on_draw	(	struct bj_window *	w,
		struct bj_render_target *	target,
		const struct bj_rect *	dirty,
		void *	user_data )

static

Definition at line 238 of file physics_particle.c.

◆ orbital_speed_soft()

bj_real orbital_speed_soft	(	bj_real	G,
		bj_real	M,
		bj_real	r,
		bj_real	eps )

static

Examples: physics_particle.c.

Definition at line 91 of file physics_particle.c.

Referenced by init_asteroids(), and init_planet().

◆ physics()

void physics ( bj_real dt )

static

Examples: physics_particle.c.

Definition at line 183 of file physics_particle.c.

Referenced by fixed_step().

◆ setup()

void * setup	(	struct bj_app *	app,
		void *	init_data )

static

Definition at line 216 of file physics_particle.c.

◆ step()

void step	(	struct bj_app *	app,
		struct bj_tick_info	tick,
		void *	user_data )

static

Definition at line 262 of file physics_particle.c.

◆ teardown()

void teardown	(	struct bj_app *	app,
		void *	user_data )

static

Definition at line 272 of file physics_particle.c.

◆ update_projection()

void update_projection ( )

static

Examples: physics_particle.c.

Definition at line 80 of file physics_particle.c.

Referenced by setup().

Variable Documentation

◆ asteroid_color

uint32_t asteroid_color

Examples: physics_particle.c.

Definition at line 78 of file physics_particle.c.

Referenced by draw(), and init_asteroids().

◆ asteroids

bj_particle_2d asteroids[800]

Examples: physics_particle.c.

Definition at line 77 of file physics_particle.c.

Referenced by draw(), init_asteroids(), and physics().

◆ planets

planet_t planets[5]

Examples: physics_particle.c.

Definition at line 73 of file physics_particle.c.

Referenced by draw(), initialize(), and physics().

◆ projection

bj_mat3x3 projection

Examples: physics_particle.c.

Definition at line 45 of file physics_particle.c.

Referenced by draw(), and update_projection().

◆ sun

bj_particle_2d sun = {0}

Examples: physics_particle.c.

Definition at line 74 of file physics_particle.c.

Referenced by draw(), init_sun(), and physics().

◆ window

bj_window* window = 0

Definition at line 44 of file physics_particle.c.

examples
physics_particle.c
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