// Game initialization function
// ==========================================================
void init(void) {
// init random seed
unsigned int seed = time(NULL);
srand(seed);
// Init asteroid object array
asteroids = (object *)malloc(sizeof(object)*MAXASTEROIDS);
int i;
for(i=0;i<MAXASTEROIDS;i++) {
// Create an asteroid at a random location on screen
vector p = makeVec(10.0-(float)(rand()%25), 10.0-(float)(rand()%25));
initAsteroid(asteroids+i, &p, 3.0);
// If asteroid spawns too close to ship, make it somewhere else
while(lengthVec(&(asteroids[i].pos)) < 5.0) {
p = makeVec(10.0-(float)(rand()%25), 10.0-(float)(rand()%25));
initAsteroid(asteroids+i, &p, 3.0);
}
// Activate 4 big asteroids at the beginning
if (i%4!=0) asteroids[i].state &= !ASTEROID_ACTIVE;
else asteroids[i].state |= ASTEROID_BIG;
}
// Init asteroid gibs (inactive)
asteroidGibs = (object**)malloc(sizeof(object*)*MAXASTEROIDS);
int ab;
for (ab=0; ab<MAXASTEROIDS; ab++) {
asteroidGibs[ab] = (object*)malloc(sizeof(object)*asteroids[ab].size);
initGib(asteroidGibs[ab], asteroids+ab, 0);
}
// init ship
ships = malloc(sizeof(object)*MAXSHIPS);
for (i = 0; i < MAXSHIPS; i++) {
initShip(ships+i);
}
myship = ships;
myship->state = 0;
// init ship stuff
//initMissile();
// init ship gibs (inactive)
shipGibs = (object*)malloc(sizeof(object)*ships[0].size*MAXSHIPS);
for (i=0; i < MAXSHIPS; i++) {
initGib(shipGibs+i*ships[0].size, ships, 0);
}
// init stars
stars = (object*)malloc(sizeof(object)*MAXSTARS);
int si; for(si=0;si<MAXSTARS; si++) {
vector v = makeVec((float)(rand()%50)-25.0, (float)(rand()%50)-25.0);
initStar(stars+si, &v);
}
}
void destroy_asteroid(celestial_object aste_destroy, list *asteroid_list, SDL_Surface **surfaces)
{
celestial_object aste;
int i, num;
if (aste_destroy.sprite_size == BIG) {
score += 10;
}
else if (aste_destroy.sprite_size == MEDIUM) {
score += 20;
}
else {
score += 30;
}
if (aste_destroy.sprite_size != SMALL) {
for (i = 0; i < 3; i++) {
if (aste_destroy.sprite_size == BIG)
initAsteroid(&aste, MEDIUM, surfaces);
if (aste_destroy.sprite_size == MEDIUM)
initAsteroid(&aste, SMALL, surfaces);
num = rand() % 3;
if (num == 0) {
aste.position.x = aste_destroy.position.x + 10;
}
else if (num == 1) {
aste.position.x = aste_destroy.position.x - 10;
}
else {
aste.position.x = aste_destroy.position.x;
}
num = rand() % 3;
if (num == 0) {
aste.position.y = aste_destroy.position.y + 10;
}
else if (num == 1) {
aste.position.y = aste_destroy.position.y - 10;
}
else {
aste.position.y = aste_destroy.position.y;
}
*asteroid_list = push(aste, *asteroid_list);
}
}
}
// Destroys an asteroid
void killAsteroid(object *o) {
// If a big asteroid, create 2 medium asteroids
if (o->state & ASTEROID_BIG) {
initAsteroid(o, &(o->pos), 2.0);
initAsteroid(o+2, &(o->pos), 2.0);
o->state &= !ASTEROID_BIG;
o->state |= ASTEROID_MEDIUM | ASTEROID_ACTIVE;
(o+2)->state &= !ASTEROID_BIG;
(o+2)->state |= ASTEROID_MEDIUM | ASTEROID_ACTIVE;
// If a medium asteroid, create 2 small asteroids
} else if (o->state & ASTEROID_MEDIUM) {
initAsteroid(o, &(o->pos), 1.0);
initAsteroid(o+1, &(o->pos), 1.0);
o->state &= !ASTEROID_MEDIUM;
o->state |= ASTEROID_SMALL | ASTEROID_ACTIVE;
(o+1)->state &= !ASTEROID_MEDIUM;
(o+1)->state |= ASTEROID_SMALL | ASTEROID_ACTIVE;
// If a small asteroid, deactivate it
} else if (o->state & ASTEROID_SMALL) {
o->state &= !ASTEROID_ACTIVE;
}
}
