    001    package net.minecraft.world;
    002
    003    import java.util.ArrayList;
    004    import java.util.HashMap;
    005    import java.util.HashSet;
    006    import java.util.Iterator;
    007    import java.util.List;
    008    import java.util.Map;
    009    import java.util.Random;
    010    import net.minecraft.block.Block;
    011    import net.minecraft.enchantment.EnchantmentProtection;
    012    import net.minecraft.entity.Entity;
    013    import net.minecraft.entity.player.EntityPlayer;
    014    import net.minecraft.util.AxisAlignedBB;
    015    import net.minecraft.util.DamageSource;
    016    import net.minecraft.util.MathHelper;
    017    import net.minecraft.util.Vec3;
    018
    019    public class Explosion
    020    {
    021        /** whether or not the explosion sets fire to blocks around it */
    022        public boolean isFlaming = false;
    023
    024        /** whether or not this explosion spawns smoke particles */
    025        public boolean isSmoking = true;
    026        private int field_77289_h = 16;
    027        private Random explosionRNG = new Random();
    028        private World worldObj;
    029        public double explosionX;
    030        public double explosionY;
    031        public double explosionZ;
    032        public Entity exploder;
    033        public float explosionSize;
    034
    035        /** A list of ChunkPositions of blocks affected by this explosion */
    036        public List affectedBlockPositions = new ArrayList();
    037        private Map field_77288_k = new HashMap();
    038
    039        public Explosion(World par1World, Entity par2Entity, double par3, double par5, double par7, float par9)
    040        {
    041            this.worldObj = par1World;
    042            this.exploder = par2Entity;
    043            this.explosionSize = par9;
    044            this.explosionX = par3;
    045            this.explosionY = par5;
    046            this.explosionZ = par7;
    047        }
    048
    049        /**
    050         * Does the first part of the explosion (destroy blocks)
    051         */
    052        public void doExplosionA()
    053        {
    054            float var1 = this.explosionSize;
    055            HashSet var2 = new HashSet();
    056            int var3;
    057            int var4;
    058            int var5;
    059            double var15;
    060            double var17;
    061            double var19;
    062
    063            for (var3 = 0; var3 < this.field_77289_h; ++var3)
    064            {
    065                for (var4 = 0; var4 < this.field_77289_h; ++var4)
    066                {
    067                    for (var5 = 0; var5 < this.field_77289_h; ++var5)
    068                    {
    069                        if (var3 == 0 || var3 == this.field_77289_h - 1 || var4 == 0 || var4 == this.field_77289_h - 1 || var5 == 0 || var5 == this.field_77289_h - 1)
    070                        {
    071                            double var6 = (double)((float)var3 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
    072                            double var8 = (double)((float)var4 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
    073                            double var10 = (double)((float)var5 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
    074                            double var12 = Math.sqrt(var6 * var6 + var8 * var8 + var10 * var10);
    075                            var6 /= var12;
    076                            var8 /= var12;
    077                            var10 /= var12;
    078                            float var14 = this.explosionSize * (0.7F + this.worldObj.rand.nextFloat() * 0.6F);
    079                            var15 = this.explosionX;
    080                            var17 = this.explosionY;
    081                            var19 = this.explosionZ;
    082
    083                            for (float var21 = 0.3F; var14 > 0.0F; var14 -= var21 * 0.75F)
    084                            {
    085                                int var22 = MathHelper.floor_double(var15);
    086                                int var23 = MathHelper.floor_double(var17);
    087                                int var24 = MathHelper.floor_double(var19);
    088                                int var25 = this.worldObj.getBlockId(var22, var23, var24);
    089
    090                                if (var25 > 0)
    091                                {
    092                                    Block var26 = Block.blocksList[var25];
    093                                    float var27 = this.exploder != null ? this.exploder.func_82146_a(this, var26, var22, var23, var24) : var26.getExplosionResistance(this.exploder, worldObj, var22, var23, var24, explosionX, explosionY, explosionZ);
    094                                    var14 -= (var27 + 0.3F) * var21;
    095                                }
    096
    097                                if (var14 > 0.0F)
    098                                {
    099                                    var2.add(new ChunkPosition(var22, var23, var24));
    100                                }
    101
    102                                var15 += var6 * (double)var21;
    103                                var17 += var8 * (double)var21;
    104                                var19 += var10 * (double)var21;
    105                            }
    106                        }
    107                    }
    108                }
    109            }
    110
    111            this.affectedBlockPositions.addAll(var2);
    112            this.explosionSize *= 2.0F;
    113            var3 = MathHelper.floor_double(this.explosionX - (double)this.explosionSize - 1.0D);
    114            var4 = MathHelper.floor_double(this.explosionX + (double)this.explosionSize + 1.0D);
    115            var5 = MathHelper.floor_double(this.explosionY - (double)this.explosionSize - 1.0D);
    116            int var29 = MathHelper.floor_double(this.explosionY + (double)this.explosionSize + 1.0D);
    117            int var7 = MathHelper.floor_double(this.explosionZ - (double)this.explosionSize - 1.0D);
    118            int var30 = MathHelper.floor_double(this.explosionZ + (double)this.explosionSize + 1.0D);
    119            List var9 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this.exploder, AxisAlignedBB.getAABBPool().addOrModifyAABBInPool((double)var3, (double)var5, (double)var7, (double)var4, (double)var29, (double)var30));
    120            Vec3 var31 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.explosionX, this.explosionY, this.explosionZ);
    121
    122            for (int var11 = 0; var11 < var9.size(); ++var11)
    123            {
    124                Entity var32 = (Entity)var9.get(var11);
    125                double var13 = var32.getDistance(this.explosionX, this.explosionY, this.explosionZ) / (double)this.explosionSize;
    126
    127                if (var13 <= 1.0D)
    128                {
    129                    var15 = var32.posX - this.explosionX;
    130                    var17 = var32.posY + (double)var32.getEyeHeight() - this.explosionY;
    131                    var19 = var32.posZ - this.explosionZ;
    132                    double var34 = (double)MathHelper.sqrt_double(var15 * var15 + var17 * var17 + var19 * var19);
    133
    134                    if (var34 != 0.0D)
    135                    {
    136                        var15 /= var34;
    137                        var17 /= var34;
    138                        var19 /= var34;
    139                        double var33 = (double)this.worldObj.getBlockDensity(var31, var32.boundingBox);
    140                        double var35 = (1.0D - var13) * var33;
    141                        var32.attackEntityFrom(DamageSource.explosion, (int)((var35 * var35 + var35) / 2.0D * 8.0D * (double)this.explosionSize + 1.0D));
    142                        double var36 = EnchantmentProtection.func_92040_a(var32, var35);
    143                        var32.motionX += var15 * var36;
    144                        var32.motionY += var17 * var36;
    145                        var32.motionZ += var19 * var36;
    146
    147                        if (var32 instanceof EntityPlayer)
    148                        {
    149                            this.field_77288_k.put((EntityPlayer)var32, this.worldObj.getWorldVec3Pool().getVecFromPool(var15 * var35, var17 * var35, var19 * var35));
    150                        }
    151                    }
    152                }
    153            }
    154
    155            this.explosionSize = var1;
    156        }
    157
    158        /**
    159         * Does the second part of the explosion (sound, particles, drop spawn)
    160         */
    161        public void doExplosionB(boolean par1)
    162        {
    163            this.worldObj.playSoundEffect(this.explosionX, this.explosionY, this.explosionZ, "random.explode", 4.0F, (1.0F + (this.worldObj.rand.nextFloat() - this.worldObj.rand.nextFloat()) * 0.2F) * 0.7F);
    164
    165            if (this.explosionSize >= 2.0F && this.isSmoking)
    166            {
    167                this.worldObj.spawnParticle("hugeexplosion", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D);
    168            }
    169            else
    170            {
    171                this.worldObj.spawnParticle("largeexplode", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D);
    172            }
    173
    174            Iterator var2;
    175            ChunkPosition var3;
    176            int var4;
    177            int var5;
    178            int var6;
    179            int var7;
    180
    181            if (this.isSmoking)
    182            {
    183                var2 = this.affectedBlockPositions.iterator();
    184
    185                while (var2.hasNext())
    186                {
    187                    var3 = (ChunkPosition)var2.next();
    188                    var4 = var3.x;
    189                    var5 = var3.y;
    190                    var6 = var3.z;
    191                    var7 = this.worldObj.getBlockId(var4, var5, var6);
    192
    193                    if (par1)
    194                    {
    195                        double var8 = (double)((float)var4 + this.worldObj.rand.nextFloat());
    196                        double var10 = (double)((float)var5 + this.worldObj.rand.nextFloat());
    197                        double var12 = (double)((float)var6 + this.worldObj.rand.nextFloat());
    198                        double var14 = var8 - this.explosionX;
    199                        double var16 = var10 - this.explosionY;
    200                        double var18 = var12 - this.explosionZ;
    201                        double var20 = (double)MathHelper.sqrt_double(var14 * var14 + var16 * var16 + var18 * var18);
    202                        var14 /= var20;
    203                        var16 /= var20;
    204                        var18 /= var20;
    205                        double var22 = 0.5D / (var20 / (double)this.explosionSize + 0.1D);
    206                        var22 *= (double)(this.worldObj.rand.nextFloat() * this.worldObj.rand.nextFloat() + 0.3F);
    207                        var14 *= var22;
    208                        var16 *= var22;
    209                        var18 *= var22;
    210                        this.worldObj.spawnParticle("explode", (var8 + this.explosionX * 1.0D) / 2.0D, (var10 + this.explosionY * 1.0D) / 2.0D, (var12 + this.explosionZ * 1.0D) / 2.0D, var14, var16, var18);
    211                        this.worldObj.spawnParticle("smoke", var8, var10, var12, var14, var16, var18);
    212                    }
    213
    214                    if (var7 > 0)
    215                    {
    216                        Block var25 = Block.blocksList[var7];
    217
    218                        if (var25.canDropFromExplosion(this))
    219                        {
    220                            var25.dropBlockAsItemWithChance(this.worldObj, var4, var5, var6, this.worldObj.getBlockMetadata(var4, var5, var6), 0.3F, 0);
    221                        }
    222
    223                        if (this.worldObj.setBlockAndMetadataWithUpdate(var4, var5, var6, 0, 0, this.worldObj.isRemote))
    224                        {
    225                            this.worldObj.notifyBlocksOfNeighborChange(var4, var5, var6, 0);
    226                        }
    227
    228                        var25.onBlockDestroyedByExplosion(this.worldObj, var4, var5, var6);
    229                    }
    230                }
    231            }
    232
    233            if (this.isFlaming)
    234            {
    235                var2 = this.affectedBlockPositions.iterator();
    236
    237                while (var2.hasNext())
    238                {
    239                    var3 = (ChunkPosition)var2.next();
    240                    var4 = var3.x;
    241                    var5 = var3.y;
    242                    var6 = var3.z;
    243                    var7 = this.worldObj.getBlockId(var4, var5, var6);
    244                    int var24 = this.worldObj.getBlockId(var4, var5 - 1, var6);
    245
    246                    if (var7 == 0 && Block.opaqueCubeLookup[var24] && this.explosionRNG.nextInt(3) == 0)
    247                    {
    248                        this.worldObj.setBlockWithNotify(var4, var5, var6, Block.fire.blockID);
    249                    }
    250                }
    251            }
    252        }
    253
    254        public Map func_77277_b()
    255        {
    256            return this.field_77288_k;
    257        }
    258    }