/*
* Copyright 2013 MovingBlocks
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.terasology.world.block.entity;
import org.terasology.audio.AudioManager;
import org.terasology.audio.StaticSound;
import org.terasology.audio.events.PlaySoundEvent;
import org.terasology.entitySystem.entity.EntityManager;
import org.terasology.entitySystem.entity.EntityRef;
import org.terasology.entitySystem.event.EventPriority;
import org.terasology.entitySystem.event.ReceiveEvent;
import org.terasology.entitySystem.systems.BaseComponentSystem;
import org.terasology.entitySystem.systems.RegisterSystem;
import org.terasology.logic.health.DoDestroyEvent;
import org.terasology.logic.inventory.events.DropItemEvent;
import org.terasology.logic.inventory.events.GiveItemEvent;
import org.terasology.logic.location.LocationComponent;
import org.terasology.math.geom.Vector3i;
import org.terasology.physics.events.ImpulseEvent;
import org.terasology.registry.In;
import org.terasology.utilities.random.FastRandom;
import org.terasology.utilities.random.Random;
import org.terasology.world.WorldProvider;
import org.terasology.world.block.Block;
import org.terasology.world.block.BlockComponent;
import org.terasology.world.block.BlockManager;
import org.terasology.world.block.entity.damage.BlockDamageModifierComponent;
import org.terasology.world.block.items.BlockItemFactory;
import org.terasology.world.block.items.OnBlockToItem;
import org.terasology.world.block.regions.ActAsBlockComponent;
import org.terasology.world.block.regions.BlockRegionComponent;
import org.terasology.world.block.sounds.BlockSounds;
import java.math.RoundingMode;
/**
* Event handler for events affecting block entities
*
*/
@RegisterSystem
public class BlockEntitySystem extends BaseComponentSystem {
@In
private WorldProvider worldProvider;
@In
private EntityManager entityManager;
@In
private AudioManager audioManager;
@In
private BlockManager blockManager;
private BlockItemFactory blockItemFactory;
private Random random;
@Override
public void initialise() {
blockItemFactory = new BlockItemFactory(entityManager);
random = new FastRandom();
}
@ReceiveEvent(priority = EventPriority.PRIORITY_LOW)
public void doDestroy(DoDestroyEvent event, EntityRef entity, ActAsBlockComponent blockComponent) {
if (blockComponent.block != null) {
commonDestroyed(event, entity, blockComponent.block.getArchetypeBlock());
}
}
@ReceiveEvent(priority = EventPriority.PRIORITY_LOW)
public void doDestroy(DoDestroyEvent event, EntityRef entity, BlockComponent blockComponent) {
commonDestroyed(event, entity, blockComponent.getBlock());
worldProvider.setBlock(blockComponent.getPosition(), blockManager.getBlock(BlockManager.AIR_ID));
}
@ReceiveEvent(priority = EventPriority.PRIORITY_TRIVIAL)
public void defaultDropsHandling(CreateBlockDropsEvent event, EntityRef entity, BlockComponent blockComponent) {
Vector3i location = blockComponent.getPosition();
commonDefaultDropsHandling(event, entity, location, blockComponent.getBlock());
}
@ReceiveEvent(priority = EventPriority.PRIORITY_TRIVIAL)
public void defaultDropsHandling(CreateBlockDropsEvent event, EntityRef entity, ActAsBlockComponent blockComponent) {
if (blockComponent.block != null) {
if (entity.hasComponent(BlockRegionComponent.class)) {
BlockRegionComponent blockRegion = entity.getComponent(BlockRegionComponent.class);
if (blockComponent.dropBlocksInRegion) {
// loop through all the blocks in this region and drop them
for (Vector3i location : blockRegion.region) {
Block blockInWorld = worldProvider.getBlock(location);
commonDefaultDropsHandling(event, entity, location, blockInWorld.getBlockFamily().getArchetypeBlock());
}
} else {
// just drop the ActAsBlock block
Vector3i location = new Vector3i(blockRegion.region.center(), RoundingMode.HALF_UP);
commonDefaultDropsHandling(event, entity, location, blockComponent.block.getArchetypeBlock());
}
} else if (entity.hasComponent(LocationComponent.class)) {
LocationComponent locationComponent = entity.getComponent(LocationComponent.class);
Vector3i location = new Vector3i(locationComponent.getWorldPosition(), RoundingMode.HALF_UP);
commonDefaultDropsHandling(event, entity, location, blockComponent.block.getArchetypeBlock());
}
}
}
public void commonDefaultDropsHandling(CreateBlockDropsEvent event, EntityRef entity, Vector3i location, Block block) {
BlockDamageModifierComponent blockDamageModifierComponent = event.getDamageType().getComponent(BlockDamageModifierComponent.class);
float chanceOfBlockDrop = 1;
if (blockDamageModifierComponent != null) {
chanceOfBlockDrop = 1 - blockDamageModifierComponent.blockAnnihilationChance;
}
if (random.nextFloat() < chanceOfBlockDrop) {
EntityRef item = blockItemFactory.newInstance(block.getBlockFamily(), entity);
entity.send(new OnBlockToItem(item));
if (shouldDropToWorld(event, block, blockDamageModifierComponent, item)) {
processDropping(item, location, blockDamageModifierComponent.impulsePower);
}
}
}
private boolean shouldDropToWorld(CreateBlockDropsEvent event, Block block, BlockDamageModifierComponent blockDamageModifierComponent, EntityRef item) {
return !isDirectPickup(block, blockDamageModifierComponent) || !giveItem(event, item);
}
private boolean giveItem(CreateBlockDropsEvent event, EntityRef item) {
GiveItemEvent giveItemEvent = new GiveItemEvent(event.getInstigator());
item.send(giveItemEvent);
return giveItemEvent.isHandled();
}
private boolean isDirectPickup(Block block, BlockDamageModifierComponent blockDamageModifierComponent) {
return block.isDirectPickup() || (blockDamageModifierComponent != null && blockDamageModifierComponent.directPickup);
}
private void commonDestroyed(DoDestroyEvent event, EntityRef entity, Block block) {
entity.send(new CreateBlockDropsEvent(event.getInstigator(), event.getDirectCause(), event.getDamageType()));
BlockDamageModifierComponent blockDamageModifierComponent = event.getDamageType().getComponent(BlockDamageModifierComponent.class);
// TODO: Configurable via block definition
if (blockDamageModifierComponent == null || !blockDamageModifierComponent.skipPerBlockEffects) {
BlockSounds sounds = block.getSounds();
if (!sounds.getDestroySounds().isEmpty()) {
StaticSound sound = random.nextItem(sounds.getDestroySounds());
entity.send(new PlaySoundEvent(sound, 0.6f));
}
}
}
private void processDropping(EntityRef item, Vector3i location, float impulsePower) {
item.send(new DropItemEvent(location.toVector3f()));
item.send(new ImpulseEvent(random.nextVector3f(impulsePower)));
}
}