/*
* 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.logic.actions;
import com.google.common.collect.Lists;
import org.terasology.utilities.Assets;
import org.terasology.audio.StaticSound;
import org.terasology.audio.events.PlaySoundEvent;
import org.terasology.entitySystem.entity.EntityBuilder;
import org.terasology.entitySystem.entity.EntityManager;
import org.terasology.entitySystem.entity.EntityRef;
import org.terasology.entitySystem.event.ReceiveEvent;
import org.terasology.entitySystem.systems.BaseComponentSystem;
import org.terasology.entitySystem.systems.RegisterMode;
import org.terasology.entitySystem.systems.RegisterSystem;
import org.terasology.logic.common.ActivateEvent;
import org.terasology.logic.delay.DelayManager;
import org.terasology.logic.delay.DelayedActionTriggeredEvent;
import org.terasology.logic.health.DoDamageEvent;
import org.terasology.logic.inventory.ItemComponent;
import org.terasology.logic.location.LocationComponent;
import org.terasology.math.geom.Vector3f;
import org.terasology.math.geom.Vector3i;
import org.terasology.registry.In;
import org.terasology.utilities.random.FastRandom;
import org.terasology.utilities.random.Random;
import org.terasology.world.BlockEntityRegistry;
import org.terasology.world.WorldProvider;
import org.terasology.world.block.Block;
import org.terasology.world.block.BlockComponent;
import org.terasology.world.block.BlockManager;
import java.util.List;
import java.util.Optional;
@RegisterSystem(RegisterMode.AUTHORITY)
public class ExplosionAuthoritySystem extends BaseComponentSystem {
static final String DELAYED_EXPLOSION_ACTION_ID = "Delayed Explosion";
@In
private WorldProvider worldProvider;
@In
private BlockEntityRegistry blockEntityRegistry;
@In
private EntityManager entityManager;
@In
private BlockManager blockManager;
@In
private DelayManager delayManager;
private Random random = new FastRandom();
private List<Optional<StaticSound>> explosionSounds = Lists.newArrayList();
@Override
public void initialise() {
explosionSounds.add(Assets.getSound("core:explode1"));
explosionSounds.add(Assets.getSound("core:explode2"));
explosionSounds.add(Assets.getSound("core:explode3"));
explosionSounds.add(Assets.getSound("core:explode4"));
explosionSounds.add(Assets.getSound("core:explode5"));
}
@ReceiveEvent
public void onActivate(ActivateEvent event, EntityRef entity, ExplosionActionComponent explosionComp) {
Vector3f origin = null;
switch (explosionComp.relativeTo) {
case Self:
LocationComponent loc = entity.getComponent(LocationComponent.class);
if (loc != null) {
origin = loc.getWorldPosition();
}
break;
case Instigator:
origin = event.getInstigatorLocation();
break;
default:
origin = event.getTargetLocation();
break;
}
if (origin == null) {
return;
}
doExplosion(explosionComp, origin, EntityRef.NULL);
}
private StaticSound getRandomExplosionSound() {
return explosionSounds.get(random.nextInt(0, explosionSounds.size() - 1)).get();
}
void doExplosion(ExplosionActionComponent explosionComp, Vector3f origin, EntityRef instigatingBlockEntity) {
EntityBuilder builder = entityManager.newBuilder("engine:smokeExplosion");
builder.getComponent(LocationComponent.class).setWorldPosition(origin);
EntityRef smokeEntity = builder.build();
smokeEntity.send(new PlaySoundEvent(getRandomExplosionSound(), 1f));
Vector3i blockPos = new Vector3i();
for (int i = 0; i < explosionComp.maxRange; i++) {
Vector3f direction = random.nextVector3f(1.0f);
for (int j = 0; j < 4; j++) {
Vector3f target = new Vector3f(origin);
target.x += direction.x * j;
target.y += direction.y * j;
target.z += direction.z * j;
blockPos.set((int) target.x, (int) target.y, (int) target.z);
Block currentBlock = worldProvider.getBlock(blockPos);
/* PHYSICS */
if (currentBlock.isDestructible()) {
EntityRef blockEntity = blockEntityRegistry.getEntityAt(blockPos);
// allow explosions to chain together, but do not chain on the instigating block
if (!blockEntity.equals(instigatingBlockEntity) && blockEntity.hasComponent(ExplosionActionComponent.class)) {
doExplosion(blockEntity.getComponent(ExplosionActionComponent.class), blockPos.toVector3f(), blockEntity);
} else {
blockEntity.send(new DoDamageEvent(explosionComp.damageAmount, explosionComp.damageType));
}
}
}
}
}
@ReceiveEvent(components = ItemComponent.class)
public void onActivateFuseOnBlock(ActivateEvent event, EntityRef entityRef, TimedExplosionComponent timedExplosionComponent) {
if (event.getTarget().hasComponent(BlockComponent.class) && event.getTarget().hasComponent(ExplosionActionComponent.class)
&& !event.getTarget().hasComponent(TimedExplosionComponent.class)) {
Optional<StaticSound> fuseBurningSound = Assets.getSound("core:FuseBurning");
if (fuseBurningSound.isPresent()) {
event.getTarget().send(new PlaySoundEvent(fuseBurningSound.get(), 1f));
}
// add a timed explosion to the block so that it stays active
event.getTarget().addComponent(new TimedExplosionComponent());
delayManager.addDelayedAction(event.getTarget(), DELAYED_EXPLOSION_ACTION_ID, timedExplosionComponent.fuseTimeMs);
}
}
@ReceiveEvent
public void onDelayedExplosion(DelayedActionTriggeredEvent event, EntityRef entityRef,
ExplosionActionComponent explosionActionComponent,
BlockComponent blockComponent) {
if (event.getActionId().equals(DELAYED_EXPLOSION_ACTION_ID)) {
// always destroy the block that caused the explosion
worldProvider.setBlock(blockComponent.getPosition(), blockManager.getBlock(BlockManager.AIR_ID));
// create the explosion from the block's location
doExplosion(explosionActionComponent, blockComponent.getPosition().toVector3f(), entityRef);
}
}
}