cn.nukkit.level.Explosion Maven / Gradle / Ivy
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A Minecraft Bedrock Edition server software implementation made in Java from scratch which supports all new features.
package cn.nukkit.level;
import cn.nukkit.api.PowerNukkitDifference;
import cn.nukkit.block.Block;
import cn.nukkit.block.BlockID;
import cn.nukkit.block.BlockTNT;
import cn.nukkit.blockentity.BlockEntity;
import cn.nukkit.blockentity.BlockEntityShulkerBox;
import cn.nukkit.entity.Entity;
import cn.nukkit.entity.item.EntityItem;
import cn.nukkit.entity.item.EntityXPOrb;
import cn.nukkit.event.block.BlockUpdateEvent;
import cn.nukkit.event.entity.EntityDamageByBlockEvent;
import cn.nukkit.event.entity.EntityDamageByEntityEvent;
import cn.nukkit.event.entity.EntityDamageEvent;
import cn.nukkit.event.entity.EntityDamageEvent.DamageCause;
import cn.nukkit.event.entity.EntityExplodeEvent;
import cn.nukkit.inventory.InventoryHolder;
import cn.nukkit.item.Item;
import cn.nukkit.item.ItemBlock;
import cn.nukkit.level.particle.HugeExplodeSeedParticle;
import cn.nukkit.math.*;
import cn.nukkit.utils.Hash;
import it.unimi.dsi.fastutil.longs.LongArraySet;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ThreadLocalRandom;
/**
* @author Angelic47 (Nukkit Project)
*/
public class Explosion {
private final int rays = 16; //Rays
private final Level level;
private final Position source;
private final double size;
private List affectedBlocks = new ArrayList<>();
private final double stepLen = 0.3d;
private final Object what;
public Explosion(Position center, double size, Entity what) {
this.level = center.getLevel();
this.source = center;
this.size = Math.max(size, 0);
this.what = what;
}
/**
* @return bool
* @deprecated
*/
public boolean explode() {
if (explodeA()) {
return explodeB();
}
return false;
}
/**
* @return bool
*/
public boolean explodeA() {
if (this.size < 0.1) {
return false;
}
Vector3 vector = new Vector3(0, 0, 0);
Vector3 vBlock = new Vector3(0, 0, 0);
int mRays = this.rays - 1;
for (int i = 0; i < this.rays; ++i) {
for (int j = 0; j < this.rays; ++j) {
for (int k = 0; k < this.rays; ++k) {
if (i == 0 || i == mRays || j == 0 || j == mRays || k == 0 || k == mRays) {
vector.setComponents((double) i / (double) mRays * 2d - 1, (double) j / (double) mRays * 2d - 1, (double) k / (double) mRays * 2d - 1);
double len = vector.length();
vector.setComponents((vector.x / len) * this.stepLen, (vector.y / len) * this.stepLen, (vector.z / len) * this.stepLen);
double pointerX = this.source.x;
double pointerY = this.source.y;
double pointerZ = this.source.z;
for (double blastForce = this.size * (ThreadLocalRandom.current().nextInt(700, 1301)) / 1000d; blastForce > 0; blastForce -= this.stepLen * 0.75d) {
int x = (int) pointerX;
int y = (int) pointerY;
int z = (int) pointerZ;
vBlock.x = pointerX >= x ? x : x - 1;
vBlock.y = pointerY >= y ? y : y - 1;
vBlock.z = pointerZ >= z ? z : z - 1;
if (vBlock.y < 0 || vBlock.y > 255) {
break;
}
Block block = this.level.getBlock(vBlock);
if (block.getId() != 0) {
Block layer1 = block.getLevelBlockAtLayer(1);
double resistance = Math.max(block.getResistance(), layer1.getResistance());
blastForce -= (resistance / 5 + 0.3d) * this.stepLen;
if (blastForce > 0) {
if (!this.affectedBlocks.contains(block)) {
this.affectedBlocks.add(block);
if (layer1.getId() != BlockID.AIR) {
this.affectedBlocks.add(layer1);
}
}
}
}
pointerX += vector.x;
pointerY += vector.y;
pointerZ += vector.z;
}
}
}
}
}
return true;
}
@PowerNukkitDifference(info = "Using new method to play sounds", since = "1.4.0.0-PN")
public boolean explodeB() {
LongArraySet updateBlocks = new LongArraySet();
List send = new ArrayList<>();
Vector3 source = (new Vector3(this.source.x, this.source.y, this.source.z)).floor();
double yield = (1d / this.size) * 100d;
if (this.what instanceof Entity) {
EntityExplodeEvent ev = new EntityExplodeEvent((Entity) this.what, this.source, this.affectedBlocks, yield);
this.level.getServer().getPluginManager().callEvent(ev);
if (ev.isCancelled()) {
return false;
} else {
yield = ev.getYield();
this.affectedBlocks = ev.getBlockList();
}
}
double explosionSize = this.size * 2d;
double minX = NukkitMath.floorDouble(this.source.x - explosionSize - 1);
double maxX = NukkitMath.ceilDouble(this.source.x + explosionSize + 1);
double minY = NukkitMath.floorDouble(this.source.y - explosionSize - 1);
double maxY = NukkitMath.ceilDouble(this.source.y + explosionSize + 1);
double minZ = NukkitMath.floorDouble(this.source.z - explosionSize - 1);
double maxZ = NukkitMath.ceilDouble(this.source.z + explosionSize + 1);
AxisAlignedBB explosionBB = new SimpleAxisAlignedBB(minX, minY, minZ, maxX, maxY, maxZ);
Entity[] list = this.level.getNearbyEntities(explosionBB, this.what instanceof Entity ? (Entity) this.what : null);
for (Entity entity : list) {
double distance = entity.distance(this.source) / explosionSize;
if (distance <= 1) {
Vector3 motion = entity.subtract(this.source).normalize();
int exposure = 1;
double impact = (1 - distance) * exposure;
int damage = (int) (((impact * impact + impact) / 2) * 8 * explosionSize + 1);
if (this.what instanceof Entity) {
entity.attack(new EntityDamageByEntityEvent((Entity) this.what, entity, DamageCause.ENTITY_EXPLOSION, damage));
} else if (this.what instanceof Block) {
entity.attack(new EntityDamageByBlockEvent((Block) this.what, entity, DamageCause.BLOCK_EXPLOSION, damage));
} else {
entity.attack(new EntityDamageEvent(entity, DamageCause.BLOCK_EXPLOSION, damage));
}
if (!(entity instanceof EntityItem || entity instanceof EntityXPOrb)) {
entity.setMotion(motion.multiply(impact));
}
}
}
ItemBlock air = new ItemBlock(Block.get(BlockID.AIR));
BlockEntity container;
//Iterator iter = this.affectedBlocks.entrySet().iterator();
for (Block block : this.affectedBlocks) {
//Block block = (Block) ((HashMap.Entry) iter.next()).getValue();
if (block.getId() == Block.TNT) {
((BlockTNT) block).prime(new NukkitRandom().nextRange(10, 30), this.what instanceof Entity ? (Entity) this.what : null);
} else if ((container = block.getLevel().getBlockEntity(block)) instanceof InventoryHolder) {
if (container instanceof BlockEntityShulkerBox) {
this.level.dropItem(block.add(0.5, 0.5, 0.5), block.toItem());
((InventoryHolder) container).getInventory().clearAll();
} else {
for (Item drop : ((InventoryHolder) container).getInventory().getContents().values()) {
this.level.dropItem(block.add(0.5, 0.5, 0.5), drop);
}
((InventoryHolder) container).getInventory().clearAll();
}
} else if (Math.random() * 100 < yield) {
for (Item drop : block.getDrops(air)) {
this.level.dropItem(block.add(0.5, 0.5, 0.5), drop);
}
}
this.level.setBlockAtLayer((int) block.x, (int) block.y, (int) block.z, block.layer, BlockID.AIR);
if (block.layer != 0) {
continue;
}
Vector3 pos = new Vector3(block.x, block.y, block.z);
for (BlockFace side : BlockFace.values()) {
Vector3 sideBlock = pos.getSide(side);
long index = Hash.hashBlock((int) sideBlock.x, (int) sideBlock.y, (int) sideBlock.z);
if (!this.affectedBlocks.contains(sideBlock) && !updateBlocks.contains(index)) {
BlockUpdateEvent ev = new BlockUpdateEvent(this.level.getBlock(sideBlock));
this.level.getServer().getPluginManager().callEvent(ev);
if (!ev.isCancelled()) {
ev.getBlock().onUpdate(Level.BLOCK_UPDATE_NORMAL);
}
Block layer1 = this.level.getBlock(sideBlock, 1);
if (layer1.getId() != BlockID.AIR) {
ev = new BlockUpdateEvent(layer1);
this.level.getServer().getPluginManager().callEvent(ev);
if (!ev.isCancelled()) {
ev.getBlock().onUpdate(Level.BLOCK_UPDATE_NORMAL);
}
}
updateBlocks.add(index);
}
}
send.add(new Vector3(block.x - source.x, block.y - source.y, block.z - source.z));
}
this.level.addParticle(new HugeExplodeSeedParticle(this.source));
this.level.addSound(source, Sound.RANDOM_EXPLODE);
return true;
}
}