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#include "bullet.h"
#include "components.h"
#include "error.h"
#include "platform.h"
#include "sprite.h"
#include "standard.h"
#include "world.h"
Entity new_player_bullet(
World* world,
int x,
int y,
int vx,
int vy,
int life
) {
Entity e;
CBullet* bullet;
CPosition* pos;
CSprite* sprite;
CCollider* col;
Sprite_ID sprid;
e = new_entity(world);
add_components(
world,
e,
ctype_sprite |
ctype_position |
ctype_bullet |
ctype_player_bullet |
ctype_collider
);
pos = &world->positions[e];
sprite = &world->sprites[e];
bullet = &world->bullets[e];
col = &world->colliders[e];
pos->x = x;
pos->y = y;
bullet->vx = vx;
bullet->vy = vy;
bullet->life = life;
col->x = 0;
col->y = 0;
if (vx < 0) {
sprid = sprite_player_bullet_left;
col->w = 9 << fbits;
col->h = 14 << fbits;
} else if (vx > 0) {
sprid = sprite_player_bullet_right;
col->w = 9 << fbits;
col->h = 14 << fbits;
} else if (vy < 0) {
sprid = sprite_player_bullet_up;
col->w = 9 << fbits;
col->h = 14 << fbits;
} else if (vy > 0) {
sprid = sprite_player_bullet_down;
col->w = 9 << fbits;
col->h = 14 << fbits;
} else {
destroy_entity(world, e);
return -1;
}
init_csprite(sprite, sprid);
return e;
}
int new_enemy_bullet(
struct World* world,
int x,
int y,
int vx,
int vy
) {
Entity e;
CBullet* bullet;
CPosition* pos;
CSprite* sprite;
CCollider* col;
e = new_entity(world);
add_components(
world,
e,
ctype_sprite |
ctype_position |
ctype_bullet |
ctype_enemy_bullet |
ctype_collider
);
pos = &world->positions[e];
sprite = &world->sprites[e];
bullet = &world->bullets[e];
col = &world->colliders[e];
pos->x = x;
pos->y = y;
bullet->vx = vx;
bullet->vy = vy;
bullet->life = 500;
col->x = 1 << fbits;
col->y = 1 << fbits;
col->w = 3 << fbits;
col->h = 3 << fbits;
init_csprite(sprite, sprite_enemy_bullet);
return e;
}
void bullet_system(World* world) {
int i;
unsigned bits;
CPosition* pos;
CBullet* bullet;
for (i = 0; i < world->entity_count; i++) {
bits = world->bitmask[i];
if ((bits & ctype_position) && (bits & ctype_bullet)) {
pos = &world->positions[i];
bullet = &world->bullets[i];
pos->x += bullet->vx;
pos->y += bullet->vy;
bullet->life--;
if (bullet->life <= 0) {
destroy_entity(world, i);
}
}
}
}
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