/**
* returns the amount of asteroids in the game
*
* @return the amount of asteroids in the game
*/
public int getAsteroidCount() {
int i = 0;
for (SpaceObject object : this.objects) {
if (object.getClass() == Asteroid.class) i++;
}
return i;
}
/**
* returns the points which can be earned if all asteroids were shot down
*
* @return the points which can be earned if all asteroids were shot down
*/
public int getTotalPoints() {
int totalPoints = 0;
for (SpaceObject object : this.objects) {
totalPoints += object.getPoints();
}
return totalPoints;
}
/**
* Generates the printable vision of each object in the game
*
* @return each object in the game as printable in an arraylist
*/
public ArrayList<Printable> getPrintables() {
ArrayList<Printable> list = new ArrayList<Printable>();
for (SpaceObject object : this.objects) {
list.add(object.getPrintable());
}
list.add(player.getPrintable());
return list;
}
/**
* handles objects, so deletes them if they should be deleted, all changes are made recursively
*
* @param objects the objects which should be handled
* @return the rest of the objects which shouldn't be deleted
*/
public ArrayList<SpaceObject> handleObjects(ArrayList<SpaceObject> objects) {
if (objects.size() <= 0) return objects;
SpaceObject thisObject = objects.get(0);
ArrayList<SpaceObject> remainingObjects = getRestOfList(objects);
ArrayList<SpaceObject> thisOverlappingObjects = thisObject.overlapingObjects(objects);
if (thisObject.shouldBeDeletedIfOverlaps(thisOverlappingObjects)) {
for (SpaceObject overlappingObject :
thisObject.shouldBeBothDeletedIfOverlaps(thisOverlappingObjects)) {
this.score += overlappingObject.getPoints();
remainingObjects.remove(overlappingObject);
}
this.score += thisObject.getPoints();
return handleObjects(remainingObjects);
} else if (thisObject.shouldBeDeletedAsItCrashsWithWall(this.resolution)) {
return handleObjects(remainingObjects);
} else {
remainingObjects = handleObjects(remainingObjects);
remainingObjects.add(thisObject);
return remainingObjects;
}
}
/* -------------------------------------------------------------*/
private void gravityEffect(ArrayList movingObjects) {
// find effect of gravity on this objects from all other objects
for (int i = 0; i < movingObjects.size(); i++) {
// reset variables
double add_vx = 0.0;
double add_vy = 0.0;
SpaceObject object = (SpaceObject) movingObjects.get(i);
if (object.getObjCount() != objectNum
&& // ignore yourself (distance = 0!)
!object.isBullet()
&& // ignore bullets
!object.isSpaceShip()) // ignore spaceships
{
// find distance vector between planet and ball
int x = pos_x - object.getXPos();
int y = pos_y - object.getYPos();
double distance = Math.sqrt(x * x + y * y);
// find effect of planet on velocity
double add_vec = (SpaceObject.G * k * object.getMass() * ballMass) / (distance * distance);
add_vx = -(x / distance) * add_vec;
add_vy = -(y / distance) * add_vec;
// add objects speeds onto spaceship speed (clip speed if too large)
x_speed += add_vx;
y_speed += add_vy;
}
}
}
/* -------------------------------------------------------------*/
private void objectCollision(ArrayList movingObjects) {
for (int i = 0; i < movingObjects.size(); i++) {
// make sure not testing if collided with yourself :P
if (((SpaceObject) movingObjects.get(i)).getObjCount() != objectNum) {
SpaceObject object = (SpaceObject) movingObjects.get(i);
// find distance vector between two objects
int x = pos_x - object.getXPos();
int y = pos_y - object.getYPos();
double distance = Math.sqrt(x * x + y * y);
// has it collided with the object?
if (distance < (radius + object.getRadius())) {
// has it collided with a BULLET (or MISSILE)?
if (object.isBullet()) {
// do nothing
}
// is it another SPACESHIP? (INSTANT DEATH)
else if (object.isSpaceShip()) {
// do nothing
}
// collided with anything else (e.g PLANET): (INSTANT DEATH)
else {
collision.play();
kill(movingObjects); // object has died
}
}
}
} // end for loop
}
@Override
public void setPos(int x, int y) {
super.setPos(x, y);
img.setLocation(x, y);
}