- package net.minecraft.world;
- import com.google.common.collect.Lists;
- import com.google.common.collect.Maps;
- import com.google.common.collect.Sets;
- import com.mojang.datafixers.util.Pair;
- import it.unimi.dsi.fastutil.objects.ObjectArrayList;
- import java.util.Collections;
- import java.util.List;
- import java.util.Map;
- import java.util.Optional;
- import java.util.Random;
- import java.util.Set;
- import javax.annotation.Nullable;
- import net.minecraft.block.AbstractFireBlock;
- import net.minecraft.block.Block;
- import net.minecraft.block.BlockState;
- import net.minecraft.block.Blocks;
- import net.minecraft.enchantment.ProtectionEnchantment;
- import net.minecraft.entity.Entity;
- import net.minecraft.entity.LivingEntity;
- import net.minecraft.entity.item.ItemEntity;
- import net.minecraft.entity.item.TNTEntity;
- import net.minecraft.entity.player.PlayerEntity;
- import net.minecraft.entity.projectile.ProjectileEntity;
- import net.minecraft.fluid.FluidState;
- import net.minecraft.item.ItemStack;
- import net.minecraft.loot.LootContext;
- import net.minecraft.loot.LootParameters;
- import net.minecraft.particles.ParticleTypes;
- import net.minecraft.tileentity.TileEntity;
- import net.minecraft.util.DamageSource;
- import net.minecraft.util.SoundCategory;
- import net.minecraft.util.SoundEvents;
- import net.minecraft.util.math.AxisAlignedBB;
- import net.minecraft.util.math.BlockPos;
- import net.minecraft.util.math.MathHelper;
- import net.minecraft.util.math.RayTraceContext;
- import net.minecraft.util.math.RayTraceResult;
- import net.minecraft.util.math.vector.Vector3d;
- import net.minecraft.world.server.ServerWorld;
- import net.minecraftforge.api.distmarker.Dist;
- import net.minecraftforge.api.distmarker.OnlyIn;
- public class Explosion {
- private static final ExplosionContext DEFAULT_CONTEXT = new ExplosionContext();
- private final boolean causesFire;
- private final Explosion.Mode mode;
- private final Random random = new Random();
- private final World world;
- private final double x;
- private final double y;
- private final double z;
- @Nullable
- private final Entity exploder;
- private final float size;
- private final DamageSource damageSource;
- private final ExplosionContext context;
- private final List<BlockPos> affectedBlockPositions = Lists.newArrayList();
- private final Map<PlayerEntity, Vector3d> playerKnockbackMap = Maps.newHashMap();
- private final Vector3d position;
- @OnlyIn(Dist.CLIENT)
- public Explosion(World worldIn, @Nullable Entity entityIn, double x, double y, double z, float size, List<BlockPos> affectedPositions) {
- this(worldIn, entityIn, x, y, z, size, false, Explosion.Mode.DESTROY, affectedPositions);
- }
- @OnlyIn(Dist.CLIENT)
- public Explosion(World worldIn, @Nullable Entity exploderIn, double xIn, double yIn, double zIn, float sizeIn, boolean causesFireIn, Explosion.Mode modeIn, List<BlockPos> affectedBlockPositionsIn) {
- this(worldIn, exploderIn, xIn, yIn, zIn, sizeIn, causesFireIn, modeIn);
- this.affectedBlockPositions.addAll(affectedBlockPositionsIn);
- }
- @OnlyIn(Dist.CLIENT)
- public Explosion(World worldIn, @Nullable Entity exploderIn, double xIn, double yIn, double zIn, float sizeIn, boolean causesFireIn, Explosion.Mode modeIn) {
- this(worldIn, exploderIn, (DamageSource)null, (ExplosionContext)null, xIn, yIn, zIn, sizeIn, causesFireIn, modeIn);
- }
- public Explosion(World world, @Nullable Entity exploder, @Nullable DamageSource source, @Nullable ExplosionContext context, double x, double y, double z, float size, boolean causesFire, Explosion.Mode mode) {
- this.world = world;
- this.exploder = exploder;
- this.size = size;
- this.x = x;
- this.y = y;
- this.z = z;
- this.causesFire = causesFire;
- this.mode = mode;
- this.damageSource = source == null ? DamageSource.causeExplosionDamage(this) : source;
- this.context = context == null ? this.getEntityExplosionContext(exploder) : context;
- this.position = new Vector3d(this.x, this.y, this.z);
- }
- private ExplosionContext getEntityExplosionContext(@Nullable Entity entity) {
- return (ExplosionContext)(entity == null ? DEFAULT_CONTEXT : new EntityExplosionContext(entity));
- }
- public static float getBlockDensity(Vector3d explosionVector, Entity entity) {
- AxisAlignedBB axisalignedbb = entity.getBoundingBox();
- double d0 = 1.0D / ((axisalignedbb.maxX - axisalignedbb.minX) * 2.0D + 1.0D);
- double d1 = 1.0D / ((axisalignedbb.maxY - axisalignedbb.minY) * 2.0D + 1.0D);
- double d2 = 1.0D / ((axisalignedbb.maxZ - axisalignedbb.minZ) * 2.0D + 1.0D);
- double d3 = (1.0D - Math.floor(1.0D / d0) * d0) / 2.0D;
- double d4 = (1.0D - Math.floor(1.0D / d2) * d2) / 2.0D;
- if (!(d0 < 0.0D) && !(d1 < 0.0D) && !(d2 < 0.0D)) {
- int i = 0;
- int j = 0;
- for(float f = 0.0F; f <= 1.0F; f = (float)((double)f + d0)) {
- for(float f1 = 0.0F; f1 <= 1.0F; f1 = (float)((double)f1 + d1)) {
- for(float f2 = 0.0F; f2 <= 1.0F; f2 = (float)((double)f2 + d2)) {
- double d5 = MathHelper.lerp((double)f, axisalignedbb.minX, axisalignedbb.maxX);
- double d6 = MathHelper.lerp((double)f1, axisalignedbb.minY, axisalignedbb.maxY);
- double d7 = MathHelper.lerp((double)f2, axisalignedbb.minZ, axisalignedbb.maxZ);
- Vector3d vector3d = new Vector3d(d5 + d3, d6, d7 + d4);
- if (entity.world.rayTraceBlocks(new RayTraceContext(vector3d, explosionVector, RayTraceContext.BlockMode.COLLIDER, RayTraceContext.FluidMode.NONE, entity)).getType() == RayTraceResult.Type.MISS) {
- ++i;
- }
- ++j;
- }
- }
- }
- return (float)i / (float)j;
- } else {
- return 0.0F;
- }
- }
- /**
- * Does the first part of the explosion (destroy blocks)
- */
- public void doExplosionA() {
- Set<BlockPos> set = Sets.newHashSet();
- int i = 16;
- for(int j = 0; j < 16; ++j) {
- for(int k = 0; k < 16; ++k) {
- for(int l = 0; l < 16; ++l) {
- if (j == 0 || j == 15 || k == 0 || k == 15 || l == 0 || l == 15) {
- double d0 = (double)((float)j / 15.0F * 2.0F - 1.0F);
- double d1 = (double)((float)k / 15.0F * 2.0F - 1.0F);
- double d2 = (double)((float)l / 15.0F * 2.0F - 1.0F);
- double d3 = Math.sqrt(d0 * d0 + d1 * d1 + d2 * d2);
- d0 = d0 / d3;
- d1 = d1 / d3;
- d2 = d2 / d3;
- float f = this.size * (0.7F + this.world.rand.nextFloat() * 0.6F);
- double d4 = this.x;
- double d6 = this.y;
- double d8 = this.z;
- for(float f1 = 0.3F; f > 0.0F; f -= 0.22500001F) {
- BlockPos blockpos = new BlockPos(d4, d6, d8);
- BlockState blockstate = this.world.getBlockState(blockpos);
- FluidState fluidstate = this.world.getFluidState(blockpos);
- Optional<Float> optional = this.context.getExplosionResistance(this, this.world, blockpos, blockstate, fluidstate);
- if (optional.isPresent()) {
- f -= (optional.get() + 0.3F) * 0.3F;
- }
- if (f > 0.0F && this.context.canExplosionDestroyBlock(this, this.world, blockpos, blockstate, f)) {
- set.add(blockpos);
- }
- d4 += d0 * (double)0.3F;
- d6 += d1 * (double)0.3F;
- d8 += d2 * (double)0.3F;
- }
- }
- }
- }
- }
- this.affectedBlockPositions.addAll(set);
- float f2 = this.size * 2.0F;
- int k1 = MathHelper.floor(this.x - (double)f2 - 1.0D);
- int l1 = MathHelper.floor(this.x + (double)f2 + 1.0D);
- int i2 = MathHelper.floor(this.y - (double)f2 - 1.0D);
- int i1 = MathHelper.floor(this.y + (double)f2 + 1.0D);
- int j2 = MathHelper.floor(this.z - (double)f2 - 1.0D);
- int j1 = MathHelper.floor(this.z + (double)f2 + 1.0D);
- List<Entity> list = this.world.getEntitiesWithinAABBExcludingEntity(this.exploder, new AxisAlignedBB((double)k1, (double)i2, (double)j2, (double)l1, (double)i1, (double)j1));
- net.minecraftforge.event.ForgeEventFactory.onExplosionDetonate(this.world, this, list, f2);
- Vector3d vector3d = new Vector3d(this.x, this.y, this.z);
- for(int k2 = 0; k2 < list.size(); ++k2) {
- Entity entity = list.get(k2);
- if (!entity.isImmuneToExplosions()) {
- double d12 = (double)(MathHelper.sqrt(entity.getDistanceSq(vector3d)) / f2);
- if (d12 <= 1.0D) {
- double d5 = entity.getPosX() - this.x;
- double d7 = (entity instanceof TNTEntity ? entity.getPosY() : entity.getPosYEye()) - this.y;
- double d9 = entity.getPosZ() - this.z;
- double d13 = (double)MathHelper.sqrt(d5 * d5 + d7 * d7 + d9 * d9);
- if (d13 != 0.0D) {
- d5 = d5 / d13;
- d7 = d7 / d13;
- d9 = d9 / d13;
- double d14 = (double)getBlockDensity(vector3d, entity);
- double d10 = (1.0D - d12) * d14;
- entity.attackEntityFrom(this.getDamageSource(), (float)((int)((d10 * d10 + d10) / 2.0D * 7.0D * (double)f2 + 1.0D)));
- double d11 = d10;
- if (entity instanceof LivingEntity) {
- d11 = ProtectionEnchantment.getBlastDamageReduction((LivingEntity)entity, d10);
- }
- entity.setMotion(entity.getMotion().add(d5 * d11, d7 * d11, d9 * d11));
- if (entity instanceof PlayerEntity) {
- PlayerEntity playerentity = (PlayerEntity)entity;
- if (!playerentity.isSpectator() && (!playerentity.isCreative() || !playerentity.abilities.isFlying)) {
- this.playerKnockbackMap.put(playerentity, new Vector3d(d5 * d10, d7 * d10, d9 * d10));
- }
- }
- }
- }
- }
- }
- }
- /**
- * Does the second part of the explosion (sound, particles, drop spawn)
- */
- public void doExplosionB(boolean spawnParticles) {
- if (this.world.isRemote) {
- this.world.playSound(this.x, this.y, this.z, SoundEvents.ENTITY_GENERIC_EXPLODE, SoundCategory.BLOCKS, 4.0F, (1.0F + (this.world.rand.nextFloat() - this.world.rand.nextFloat()) * 0.2F) * 0.7F, false);
- }
- boolean flag = this.mode != Explosion.Mode.NONE;
- if (spawnParticles) {
- if (!(this.size < 2.0F) && flag) {
- this.world.addParticle(ParticleTypes.EXPLOSION_EMITTER, this.x, this.y, this.z, 1.0D, 0.0D, 0.0D);
- } else {
- this.world.addParticle(ParticleTypes.EXPLOSION, this.x, this.y, this.z, 1.0D, 0.0D, 0.0D);
- }
- }
- if (flag) {
- ObjectArrayList<Pair<ItemStack, BlockPos>> objectarraylist = new ObjectArrayList<>();
- Collections.shuffle(this.affectedBlockPositions, this.world.rand);
- for(BlockPos blockpos : this.affectedBlockPositions) {
- BlockState blockstate = this.world.getBlockState(blockpos);
- Block block = blockstate.getBlock();
- if (!blockstate.isAir(this.world, blockpos)) {
- BlockPos blockpos1 = blockpos.toImmutable();
- this.world.getProfiler().startSection("explosion_blocks");
- if (blockstate.canDropFromExplosion(this.world, blockpos, this) && this.world instanceof ServerWorld) {
- TileEntity tileentity = blockstate.hasTileEntity() ? this.world.getTileEntity(blockpos) : null;
- LootContext.Builder lootcontext$builder = (new LootContext.Builder((ServerWorld)this.world)).withRandom(this.world.rand).withParameter(LootParameters.field_237457_g_, Vector3d.copyCentered(blockpos)).withParameter(LootParameters.TOOL, ItemStack.EMPTY).withNullableParameter(LootParameters.BLOCK_ENTITY, tileentity).withNullableParameter(LootParameters.THIS_ENTITY, this.exploder);
- if (this.mode == Explosion.Mode.DESTROY) {
- lootcontext$builder.withParameter(LootParameters.EXPLOSION_RADIUS, this.size);
- }
- blockstate.getDrops(lootcontext$builder).forEach((stack) -> {
- handleExplosionDrops(objectarraylist, stack, blockpos1);
- });
- }
- blockstate.onBlockExploded(this.world, blockpos, this);
- this.world.getProfiler().endSection();
- }
- }
- for(Pair<ItemStack, BlockPos> pair : objectarraylist) {
- Block.spawnAsEntity(this.world, pair.getSecond(), pair.getFirst());
- }
- }
- if (this.causesFire) {
- for(BlockPos blockpos2 : this.affectedBlockPositions) {
- if (this.random.nextInt(3) == 0 && this.world.getBlockState(blockpos2).isAir() && this.world.getBlockState(blockpos2.down()).isOpaqueCube(this.world, blockpos2.down())) {
- this.world.setBlockState(blockpos2, AbstractFireBlock.getFireForPlacement(this.world, blockpos2));
- }
- }
- }
- }
- private static void handleExplosionDrops(ObjectArrayList<Pair<ItemStack, BlockPos>> dropPositionArray, ItemStack stack, BlockPos pos) {
- int i = dropPositionArray.size();
- for(int j = 0; j < i; ++j) {
- Pair<ItemStack, BlockPos> pair = dropPositionArray.get(j);
- ItemStack itemstack = pair.getFirst();
- if (ItemEntity.canMergeStacks(itemstack, stack)) {
- ItemStack itemstack1 = ItemEntity.mergeStacks(itemstack, stack, 16);
- dropPositionArray.set(j, Pair.of(itemstack1, pair.getSecond()));
- if (stack.isEmpty()) {
- return;
- }
- }
- }
- dropPositionArray.add(Pair.of(stack, pos));
- }
- public DamageSource getDamageSource() {
- return this.damageSource;
- }
- public Map<PlayerEntity, Vector3d> getPlayerKnockbackMap() {
- return this.playerKnockbackMap;
- }
- /**
- * Returns either the entity that placed the explosive block, the entity that caused the explosion or null.
- */
- @Nullable
- public LivingEntity getExplosivePlacedBy() {
- if (this.exploder == null) {
- return null;
- } else if (this.exploder instanceof TNTEntity) {
- return ((TNTEntity)this.exploder).getTntPlacedBy();
- } else if (this.exploder instanceof LivingEntity) {
- return (LivingEntity)this.exploder;
- } else {
- if (this.exploder instanceof ProjectileEntity) {
- Entity entity = ((ProjectileEntity)this.exploder).func_234616_v_();
- if (entity instanceof LivingEntity) {
- return (LivingEntity)entity;
- }
- }
- return null;
- }
- }
- public void clearAffectedBlockPositions() {
- this.affectedBlockPositions.clear();
- }
- public List<BlockPos> getAffectedBlockPositions() {
- return this.affectedBlockPositions;
- }
- public Vector3d getPosition() {
- return this.position;
- }
- @Nullable
- public Entity getExploder() {
- return this.exploder;
- }
- public static enum Mode {
- NONE,
- BREAK,
- DESTROY;
- }
- }
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