/**
* Finds all entities of a type on the map.
*
* @param entityType a type of entity
* @return the list of the entities of this kind on the map
*/
public List<MapEntity> getEntitiesOfType(EntityType entityType) {
List<MapEntity> list = new LinkedList<MapEntity>();
for (Layer layer : Layer.values()) {
list.addAll(allEntities[layer.getId()].getEntitiesOfType(entityType));
}
return list;
}
/**
* Brings the specified entities to the front, keeping their layer. The order of the specified
* entities in the map is unchanged.
*
* @param entities the entities to move
*/
public void bringToFront(List<MapEntity> entities) {
List<MapEntity> sortedEntities = getSortedEntities(entities);
// bring to front each entity from sortedEntities
ListIterator<MapEntity> iterator = sortedEntities.listIterator(0);
while (iterator.hasNext()) {
MapEntity entity = iterator.next();
Layer layer = entity.getLayer();
allEntities[layer.getId()].remove(entity);
allEntities[layer.getId()].addLast(entity);
}
setChanged();
notifyObservers();
}
/**
* Brings the specified entities to the back, keeping their layer. The order of the specified
* entities in the map is unchanged.
*
* @param entities the entities to move
*/
public void bringToBack(List<MapEntity> entities) {
List<MapEntity> sortedEntities = getSortedEntities(entities);
// bring to back each entity from sortedEntities
ListIterator<MapEntity> iterator = sortedEntities.listIterator(sortedEntities.size());
while (iterator.hasPrevious()) {
MapEntity entity = iterator.previous();
Layer layer = entity.getLayer();
allEntities[layer.getId()].remove(entity);
allEntities[layer.getId()].addFirst(entity);
}
setChanged();
notifyObservers();
}
/**
* Returns the specified entities, sorted in the order of the map. The first entity is the lowest
* one, the last entity is the highest one.
*
* @param entities the entities to sort
* @return the same entities, sorted as they are in the map
*/
public List<MapEntity> getSortedEntities(List<MapEntity> entities) {
List<MapEntity> sortedEntities = new LinkedList<MapEntity>();
// sort the entities so that they have the same order as in the map
for (Layer layer : Layer.values()) {
for (MapEntity entity : allEntities[layer.getId()]) {
if (entities.contains(entity)) {
sortedEntities.add(entity);
}
}
}
// now sortedEntities contains all entities of the list,
// sorted in the same order as in the map
return sortedEntities;
}
/**
* Returns the entities located in a rectangle defined by two points.
*
* @param x1 x coordinate of the first point
* @param y1 y coordinate of the first point
* @param x2 x coordinate of the second point
* @param y2 y coordinate of the second point
*/
public List<MapEntity> getEntitiesInRectangle(int x1, int y1, int x2, int y2) {
List<MapEntity> entitiesInRectangle = new LinkedList<MapEntity>();
int x = Math.min(x1, x2);
int width = Math.abs(x2 - x1);
int y = Math.min(y1, y2);
int height = Math.abs(y2 - y1);
Rectangle rectangle = new Rectangle(x, y, width, height);
for (Layer layer : Layer.values()) {
for (MapEntity entity : allEntities[layer.getId()]) {
if (rectangle.contains(entity.getPositionInMap())) {
entitiesInRectangle.add(entity);
}
}
}
return entitiesInRectangle;
}