TinkersConstruct/src/main/java/tconstruct/world/MiningExplosion.java

package tconstruct.world;

import java.util.*;
import net.minecraft.block.Block;
import net.minecraft.enchantment.EnchantmentProtection;
import net.minecraft.entity.Entity;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.util.*;
import net.minecraft.world.*;

public class MiningExplosion extends Explosion {
    World world;
    private final Random random = new Random();
    private final int field_77289_h = 16;
    private final Map<Entity, Vec3> field_77288_k = new HashMap<>();

    public MiningExplosion(World par1World, Entity par2Entity, double par3, double par5, double par7, float par9) {
        super(par1World, par2Entity, par3, par5, par7, par9);
        world = par1World;
    }

    @Override
    public void doExplosionA() {
        float f = this.explosionSize;
        HashSet<ChunkPosition> hashset = new HashSet<>();
        int i;
        int j;
        int k;
        double d0;
        double d1;
        double d2;

        for (i = 0; i < this.field_77289_h; ++i) {
            for (j = 0; j < this.field_77289_h; ++j) {
                for (k = 0; k < this.field_77289_h; ++k) {
                    if (i == 0
                            || i == this.field_77289_h - 1
                            || j == 0
                            || j == this.field_77289_h - 1
                            || k == 0
                            || k == this.field_77289_h - 1) {
                        double d3 = (float) i / ((float) this.field_77289_h - 1.0F) * 2.0F - 1.0F;
                        double d4 = (float) j / ((float) this.field_77289_h - 1.0F) * 2.0F - 1.0F;
                        double d5 = (float) k / ((float) this.field_77289_h - 1.0F) * 2.0F - 1.0F;
                        double d6 = Math.sqrt(d3 * d3 + d4 * d4 + d5 * d5);
                        d3 /= d6;
                        d4 /= d6;
                        d5 /= d6;
                        float f1 = this.explosionSize * (0.7F + this.world.rand.nextFloat() * 0.6F);
                        d0 = this.explosionX;
                        d1 = this.explosionY;
                        d2 = this.explosionZ;

                        for (float f2 = 0.3F; f1 > 0.0F; f1 -= f2 * 0.75F) {
                            int l = MathHelper.floor_double(d0);
                            int i1 = MathHelper.floor_double(d1);
                            int j1 = MathHelper.floor_double(d2);
                            Block k1 = this.world.getBlock(l, i1, j1);

                            if (k1 != Blocks.air) {
                                float f3 = this.exploder != null
                                        ? this.exploder.func_145772_a(this, this.world, l, i1, j1, k1)
                                        : k1.getExplosionResistance(
                                                this.exploder, world, l, i1, j1, explosionX, explosionY, explosionZ);
                                f1 -= (f3 + 0.8F) * f2 * 0.25f;
                            }

                            if (f1 > 0.0F
                                    && (this.exploder == null
                                            || this.exploder.func_145774_a(this, this.world, l, i1, j1, k1, f1))) {
                                hashset.add(new ChunkPosition(l, i1, j1));
                            }

                            d0 += d3 * (double) f2;
                            d1 += d4 * (double) f2;
                            d2 += d5 * (double) f2;
                        }
                    }
                }
            }
        }

        this.affectedBlockPositions.addAll(hashset);
        this.explosionSize *= 2.0F;
        i = MathHelper.floor_double(this.explosionX - (double) this.explosionSize - 1.0D);
        j = MathHelper.floor_double(this.explosionX + (double) this.explosionSize + 1.0D);
        k = MathHelper.floor_double(this.explosionY - (double) this.explosionSize - 1.0D);
        int l1 = MathHelper.floor_double(this.explosionY + (double) this.explosionSize + 1.0D);
        int i2 = MathHelper.floor_double(this.explosionZ - (double) this.explosionSize - 1.0D);
        int j2 = MathHelper.floor_double(this.explosionZ + (double) this.explosionSize + 1.0D);
        List<Entity> list = this.world.getEntitiesWithinAABBExcludingEntity(
                this.exploder, AxisAlignedBB.getBoundingBox(i, k, i2, j, l1, j2));
        Vec3 vec3 = Vec3.createVectorHelper(this.explosionX, this.explosionY, this.explosionZ);

        for (Entity entity : list) {
            double d7 =
                    entity.getDistance(this.explosionX, this.explosionY, this.explosionZ) / (double) this.explosionSize;

            if (d7 <= 1.0D) {
                d0 = entity.posX - this.explosionX;
                d1 = entity.posY + (double) entity.getEyeHeight() - this.explosionY;
                d2 = entity.posZ - this.explosionZ;
                double d8 = MathHelper.sqrt_double(d0 * d0 + d1 * d1 + d2 * d2);

                if (d8 != 0.0D) {
                    d0 /= d8;
                    d1 /= d8;
                    d2 /= d8;
                    double d9 = this.world.getBlockDensity(vec3, entity.boundingBox);
                    double d10 = (1.0D - d7) * d9;
                    if (!(entity instanceof EntityItem))
                        entity.attackEntityFrom(DamageSource.setExplosionSource(this), (float)
                                ((int) ((d10 * d10 + d10) / 2.0D * 8.0D * (double) this.explosionSize + 1.0D)));
                    double d11 = EnchantmentProtection.func_92092_a(entity, d10);
                    entity.motionX += d0 * d11;
                    entity.motionY += d1 * d11;
                    entity.motionZ += d2 * d11;

                    if (entity instanceof EntityPlayer) {
                        this.field_77288_k.put(entity, Vec3.createVectorHelper(d0 * d10, d1 * d10, d2 * d10));
                    }
                }
            }
        }

        this.explosionSize = f;
    }

    @Override
    public void doExplosionB(boolean par1) {
        this.world.playSoundEffect(
                this.explosionX,
                this.explosionY,
                this.explosionZ,
                "random.explode",
                4.0F,
                (1.0F + (this.world.rand.nextFloat() - this.world.rand.nextFloat()) * 0.2F) * 0.7F);

        if (this.explosionSize >= 2.0F && this.isSmoking) {
            this.world.spawnParticle(
                    "hugeexplosion", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D);
        } else {
            this.world.spawnParticle(
                    "largeexplode", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D);
        }

        Iterator<ChunkPosition> iterator;
        ChunkPosition chunkposition;
        int i;
        int j;
        int k;
        Block l;

        if (this.isSmoking) {
            iterator = this.affectedBlockPositions.iterator();

            while (iterator.hasNext()) {
                chunkposition = iterator.next();
                i = chunkposition.chunkPosX;
                j = chunkposition.chunkPosY;
                k = chunkposition.chunkPosZ;
                l = this.world.getBlock(i, j, k);

                if (par1) {
                    double d0 = (float) i + this.world.rand.nextFloat();
                    double d1 = (float) j + this.world.rand.nextFloat();
                    double d2 = (float) k + this.world.rand.nextFloat();
                    double d3 = d0 - this.explosionX;
                    double d4 = d1 - this.explosionY;
                    double d5 = d2 - this.explosionZ;
                    double d6 = MathHelper.sqrt_double(d3 * d3 + d4 * d4 + d5 * d5);
                    d3 /= d6;
                    d4 /= d6;
                    d5 /= d6;
                    double d7 = 0.5D / (d6 / (double) this.explosionSize + 0.1D);
                    d7 *= this.world.rand.nextFloat() * this.world.rand.nextFloat() + 0.3F;
                    d3 *= d7;
                    d4 *= d7;
                    d5 *= d7;
                    this.world.spawnParticle(
                            "explode",
                            (d0 + this.explosionX * 1.0D) / 2.0D,
                            (d1 + this.explosionY * 1.0D) / 2.0D,
                            (d2 + this.explosionZ * 1.0D) / 2.0D,
                            d3,
                            d4,
                            d5);
                    this.world.spawnParticle("smoke", d0, d1, d2, d3, d4, d5);
                }

                if (l != Blocks.air) {
                    if (l.canDropFromExplosion(this)) {
                        l.dropBlockAsItemWithChance(this.world, i, j, k, this.world.getBlockMetadata(i, j, k), 1.0F, 0);
                    }
                    l.onBlockExploded(this.world, i, j, k, this);
                }
            }
        }

        if (this.isFlaming) {
            iterator = this.affectedBlockPositions.iterator();

            while (iterator.hasNext()) {
                chunkposition = (ChunkPosition) iterator.next();
                i = chunkposition.chunkPosX;
                j = chunkposition.chunkPosY;
                k = chunkposition.chunkPosZ;
                l = this.world.getBlock(i, j, k);
                Block i1 = this.world.getBlock(i, j - 1, k);

                if (l == Blocks.air && i1.isOpaqueCube() && this.random.nextInt(3) == 0) {
                    this.world.setBlock(i, j, k, Blocks.fire);
                }
            }
        }
    }
}