private EntityRef createBlockEntity(Vector3i blockPosition, Block block) {
EntityBuilder builder = entityManager.newBuilder(block.getPrefab().orElse(null));
builder.addComponent(new LocationComponent(blockPosition.toVector3f()));
builder.addComponent(new BlockComponent(block, blockPosition));
if (block.isDestructible() && !builder.hasComponent(HealthComponent.class)) {
// Block regen should always take the same amount of time, regardless of its hardness
builder.addComponent(
new HealthComponent(
block.getHardness(), block.getHardness() / BLOCK_REGEN_SECONDS, 1.0f));
}
boolean isTemporary = isTemporaryBlock(builder, block);
if (!isTemporary && !builder.hasComponent(NetworkComponent.class)) {
builder.addComponent(new NetworkComponent());
}
EntityRef blockEntity;
if (isTemporary) {
blockEntity = builder.buildWithoutLifecycleEvents();
temporaryBlockEntities.add(blockEntity);
} else {
blockEntity = builder.build();
}
blockEntityLookup.put(new Vector3i(blockPosition), blockEntity);
return blockEntity;
}
/**
* Transforms a block entity with the change of block type. This is driven from the delta between
* the old and new block type prefabs, but takes into account changes made to the block entity.
*
* @param blockEntity The entity to update
* @param oldType The previous type of the block
* @param type The new type of the block
*/
private void updateBlockEntityComponents(
EntityRef blockEntity,
Block oldType,
Block type,
Set<Class<? extends Component>> retainComponents) {
BlockComponent blockComponent = blockEntity.getComponent(BlockComponent.class);
Optional<Prefab> oldPrefab = oldType.getPrefab();
EntityBuilder oldEntityBuilder = entityManager.newBuilder(oldPrefab.orElse(null));
oldEntityBuilder.addComponent(
new BlockComponent(oldType, new Vector3i(blockComponent.getPosition())));
BeforeEntityCreated oldEntityEvent =
new BeforeEntityCreated(oldPrefab.orElse(null), oldEntityBuilder.iterateComponents());
blockEntity.send(oldEntityEvent);
for (Component comp : oldEntityEvent.getResultComponents()) {
oldEntityBuilder.addComponent(comp);
}
Optional<Prefab> newPrefab = type.getPrefab();
EntityBuilder newEntityBuilder = entityManager.newBuilder(newPrefab.orElse(null));
newEntityBuilder.addComponent(
new BlockComponent(type, new Vector3i(blockComponent.getPosition())));
BeforeEntityCreated newEntityEvent =
new BeforeEntityCreated(newPrefab.orElse(null), newEntityBuilder.iterateComponents());
blockEntity.send(newEntityEvent);
for (Component comp : newEntityEvent.getResultComponents()) {
newEntityBuilder.addComponent(comp);
}
for (Component component : blockEntity.iterateComponents()) {
if (!COMMON_BLOCK_COMPONENTS.contains(component.getClass())
&& !entityManager
.getComponentLibrary()
.getMetadata(component.getClass())
.isRetainUnalteredOnBlockChange()
&& !newEntityBuilder.hasComponent(component.getClass())
&& !retainComponents.contains(component.getClass())) {
blockEntity.removeComponent(component.getClass());
}
}
blockComponent.setBlock(type);
blockEntity.saveComponent(blockComponent);
HealthComponent health = blockEntity.getComponent(HealthComponent.class);
if (health == null && type.isDestructible()) {
blockEntity.addComponent(
new HealthComponent(type.getHardness(), type.getHardness() / BLOCK_REGEN_SECONDS, 1.0f));
} else if (health != null && !type.isDestructible()) {
blockEntity.removeComponent(HealthComponent.class);
} else if (health != null && type.isDestructible()) {
health.maxHealth = type.getHardness();
health.currentHealth = Math.min(health.currentHealth, health.maxHealth);
blockEntity.saveComponent(health);
}
for (Component comp : newEntityBuilder.iterateComponents()) {
copyIntoPrefab(blockEntity, comp, retainComponents);
}
}