background_actor *background_actor_init(background_actor *bg)
{
actor_init(&bg->a, background_render_handler, NULL);
sprite_init(
&bg->background_sprite,
800,
600,
&eng.sand_decal);
bg->background_sprite.r[0] = 400;
bg->background_sprite.r[1] = 300;
return bg;
}
/*
* Place a swarm at start with a number of leaders that all have
* the same initial velocity.
*/
Swarm *swarm_create(Point *start, Vector *initVel, Module *shape,
int numLeaders, int numActorsPerLeader, float spread){
int i, j, id = 0, verbose = 1;
float genX, genY, genZ;
if(verbose) printf("creating swarm\n");
Swarm *s = malloc(sizeof(Swarm));
s->leaders = malloc(sizeof(Leader)*numLeaders);
s->actors = malloc(sizeof(Actor)*numActorsPerLeader*numLeaders);
s->numActors = numActorsPerLeader*numLeaders;
s->numLeaders = numLeaders;
for(i=0; i<numLeaders; i++){
genX = spread - ((double)rand() / RAND_MAX) * 2.0 * spread;
genY = spread - ((double)rand() / RAND_MAX) * 2.0 * spread;
genZ = spread - ((double)rand() / RAND_MAX) * 2.0 * spread;
leader_init(&(s->leaders[i]), shape);
leader_setLocation(&(s->leaders[i]),
start->val[0] + genX,
start->val[1] + genY,
start->val[2] + genZ);
leader_setVelocity(&(s->leaders[i]), initVel);
for(j=0; j<numActorsPerLeader; j++){
genX = spread - ((double)rand() / RAND_MAX) * 2.0 * spread;
genY = spread - ((double)rand() / RAND_MAX) * 2.0 * spread;
genZ = spread - ((double)rand() / RAND_MAX) * 2.0 * spread;
actor_init(&(s->actors[j+(i*numActorsPerLeader)]), &(s->leaders[i]), shape);
actor_setLocation(&(s->actors[j+(i*numActorsPerLeader)]),
start->val[0] + genX,
start->val[1] + genY,
start->val[2] + genZ);
actor_setID(&(s->actors[j+(i*numActorsPerLeader)]), id++);
}
}
return s;
}