/**
* Returns true if a grid point of the map is free (with no car)
*
* @param p
* @return
*/
private boolean isFree(GridPoint p) {
int count = 0;
Iterable<TrafficElement> elements = map.getObjectsAt(p.getX(), p.getY());
for (TrafficElement elem : elements) {
count++;
}
return count == 0;
}
/**
* @param x
* @param y
* @return
*/
private int getNumElements(int x, int y) {
Iterable<TrafficElement> elements = map.getObjectsAt(x, y);
int elemsCount = 0;
Iterator<TrafficElement> iterator = elements.iterator();
while (iterator.hasNext()) {
iterator.next();
elemsCount++;
}
return elemsCount;
}
/** Executes step method for each car and adds them to their new position */
private void moveCars() {
this.carsToRemove.clear();
this.positionsToCheck.clear();
// Cars compute their new position
for (Car car : travelingCars) car.move();
// Move cars in the map
for (Car car : travelingCars) {
int x = car.getX();
int y = car.getY();
// Move car
if (!this.isPositionOutOfBounds(x, y)) {
map.moveTo(car, x, y);
this.addPositionToCheck(car.getPosition().getGridPoint());
}
// Car moved out of the map. Add for removal
else {
this.addCarToRemove(car);
}
}
// Remove cars out of bounds
for (Car car : this.carsToRemove) {
remove(car);
}
// Manage collisions
for (String posId : this.positionsToCheck.keySet()) {
GridPoint pos = this.positionsToCheck.get(posId);
int x = pos.getX();
int y = pos.getY();
if (this.getNumElements(x, y) > 1) {
Collision col = new Collision(x, y, map);
Iterable<TrafficElement> elements = map.getObjectsAt(x, y);
remove(elements);
context.add(col);
map.moveTo(col, x, y);
this.collisions.add(col);
}
}
}
public void infect() {
GridPoint pt = grid.getLocation(this);
List<Object> humans = new ArrayList<Object>();
for (Object obj : grid.getObjectsAt(pt.getX(), pt.getY())) {
if (obj instanceof Human) {
humans.add(obj);
}
}
if (humans.size() > 0) {
int index = RandomHelper.nextIntFromTo(0, humans.size() - 1);
Object obj = humans.get(index);
NdPoint spacePt = space.getLocation(obj);
Context<Object> context = ContextUtils.getContext(obj);
context.remove(obj);
Zombie zombie = new Zombie(space, grid);
context.add(zombie);
space.moveTo(zombie, spacePt.getX(), spacePt.getY());
grid.moveTo(zombie, pt.getX(), pt.getY());
Network<Object> net = (Network<Object>) context.getProjection("infection network");
net.addEdge(this, zombie);
}
}