int aliens_move() {
animation_next(invaders->small_alien);
animation_next(invaders->medium_alien);
animation_next(invaders->large_alien);
if(invaders->head == NULL)
return -1;
alien* iterator = invaders->head;
if ((direction == -1
&& invaders->leftmost->x + direction * ALIEN_X_DELTA
< PLACEHOLDER_LEFT_BORDER)
|| (direction == 1
&& invaders->rightmost->x + invaders->rightmost->width
+ ALIEN_X_DELTA > PLACEHOLDER_RIGHT_BORDER)) {
if (invaders->last->y + invaders->last->height + ALIEN_Y_DELTA
> PLACEHOLDER_SHIELD_LINE) {
return -1;
}
do {
alien_move(iterator, 0, ALIEN_Y_DELTA);
iterator = iterator->next;
} while (iterator != NULL);
direction = (-1) * direction;
} else
do {
alien_move(iterator, direction * ALIEN_X_DELTA, 0);
iterator = iterator->next;
} while (iterator != NULL);
return 0;
}
JNIEXPORT jint JNICALL Java_org_geuz_onelab_Gmsh_animationNext
(JNIEnv *, jobject)
{
return animation_next();
}
