001    package net.minecraft.src;
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    
011    public class Explosion
012    {
013        /** whether or not the explosion sets fire to blocks around it */
014        public boolean isFlaming = false;
015        private int field_77289_h = 16;
016        private Random explosionRNG = new Random();
017        private World worldObj;
018        public double explosionX;
019        public double explosionY;
020        public double explosionZ;
021        public Entity exploder;
022        public float explosionSize;
023        public List field_77281_g = new ArrayList();
024        private Map field_77288_k = new HashMap();
025    
026        public Explosion(World par1World, Entity par2Entity, double par3, double par5, double par7, float par9)
027        {
028            this.worldObj = par1World;
029            this.exploder = par2Entity;
030            this.explosionSize = par9;
031            this.explosionX = par3;
032            this.explosionY = par5;
033            this.explosionZ = par7;
034        }
035    
036        /**
037         * Does the first part of the explosion (destroy blocks)
038         */
039        public void doExplosionA()
040        {
041            float var1 = this.explosionSize;
042            HashSet var2 = new HashSet();
043            int var3;
044            int var4;
045            int var5;
046            double var15;
047            double var17;
048            double var19;
049    
050            for (var3 = 0; var3 < this.field_77289_h; ++var3)
051            {
052                for (var4 = 0; var4 < this.field_77289_h; ++var4)
053                {
054                    for (var5 = 0; var5 < this.field_77289_h; ++var5)
055                    {
056                        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)
057                        {
058                            double var6 = (double)((float)var3 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
059                            double var8 = (double)((float)var4 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
060                            double var10 = (double)((float)var5 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
061                            double var12 = Math.sqrt(var6 * var6 + var8 * var8 + var10 * var10);
062                            var6 /= var12;
063                            var8 /= var12;
064                            var10 /= var12;
065                            float var14 = this.explosionSize * (0.7F + this.worldObj.rand.nextFloat() * 0.6F);
066                            var15 = this.explosionX;
067                            var17 = this.explosionY;
068                            var19 = this.explosionZ;
069    
070                            for (float var21 = 0.3F; var14 > 0.0F; var14 -= var21 * 0.75F)
071                            {
072                                int var22 = MathHelper.floor_double(var15);
073                                int var23 = MathHelper.floor_double(var17);
074                                int var24 = MathHelper.floor_double(var19);
075                                int var25 = this.worldObj.getBlockId(var22, var23, var24);
076    
077                                if (var25 > 0)
078                                {
079                                    var14 -= (Block.blocksList[var25].getExplosionResistance(this.exploder, worldObj, var22, var23, var24, explosionX, explosionY, explosionZ) + 0.3F) * var21;
080                                }
081    
082                                if (var14 > 0.0F)
083                                {
084                                    var2.add(new ChunkPosition(var22, var23, var24));
085                                }
086    
087                                var15 += var6 * (double)var21;
088                                var17 += var8 * (double)var21;
089                                var19 += var10 * (double)var21;
090                            }
091                        }
092                    }
093                }
094            }
095    
096            this.field_77281_g.addAll(var2);
097            this.explosionSize *= 2.0F;
098            var3 = MathHelper.floor_double(this.explosionX - (double)this.explosionSize - 1.0D);
099            var4 = MathHelper.floor_double(this.explosionX + (double)this.explosionSize + 1.0D);
100            var5 = MathHelper.floor_double(this.explosionY - (double)this.explosionSize - 1.0D);
101            int var27 = MathHelper.floor_double(this.explosionY + (double)this.explosionSize + 1.0D);
102            int var7 = MathHelper.floor_double(this.explosionZ - (double)this.explosionSize - 1.0D);
103            int var28 = MathHelper.floor_double(this.explosionZ + (double)this.explosionSize + 1.0D);
104            List var9 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this.exploder, AxisAlignedBB.getAABBPool().addOrModifyAABBInPool((double)var3, (double)var5, (double)var7, (double)var4, (double)var27, (double)var28));
105            Vec3 var29 = Vec3.getVec3Pool().getVecFromPool(this.explosionX, this.explosionY, this.explosionZ);
106    
107            for (int var11 = 0; var11 < var9.size(); ++var11)
108            {
109                Entity var30 = (Entity)var9.get(var11);
110                double var13 = var30.getDistance(this.explosionX, this.explosionY, this.explosionZ) / (double)this.explosionSize;
111    
112                if (var13 <= 1.0D)
113                {
114                    var15 = var30.posX - this.explosionX;
115                    var17 = var30.posY + (double)var30.getEyeHeight() - this.explosionY;
116                    var19 = var30.posZ - this.explosionZ;
117                    double var32 = (double)MathHelper.sqrt_double(var15 * var15 + var17 * var17 + var19 * var19);
118    
119                    if (var32 != 0.0D)
120                    {
121                        var15 /= var32;
122                        var17 /= var32;
123                        var19 /= var32;
124                        double var31 = (double)this.worldObj.getBlockDensity(var29, var30.boundingBox);
125                        double var33 = (1.0D - var13) * var31;
126                        var30.attackEntityFrom(DamageSource.explosion, (int)((var33 * var33 + var33) / 2.0D * 8.0D * (double)this.explosionSize + 1.0D));
127                        var30.motionX += var15 * var33;
128                        var30.motionY += var17 * var33;
129                        var30.motionZ += var19 * var33;
130    
131                        if (var30 instanceof EntityPlayer)
132                        {
133                            this.field_77288_k.put((EntityPlayer)var30, Vec3.getVec3Pool().getVecFromPool(var15 * var33, var17 * var33, var19 * var33));
134                        }
135                    }
136                }
137            }
138    
139            this.explosionSize = var1;
140        }
141    
142        /**
143         * Does the second part of the explosion (sound, particles, drop spawn)
144         */
145        public void doExplosionB(boolean par1)
146        {
147            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);
148            this.worldObj.spawnParticle("hugeexplosion", this.explosionX, this.explosionY, this.explosionZ, 0.0D, 0.0D, 0.0D);
149            Iterator var2 = this.field_77281_g.iterator();
150            ChunkPosition var3;
151            int var4;
152            int var5;
153            int var6;
154            int var7;
155    
156            while (var2.hasNext())
157            {
158                var3 = (ChunkPosition)var2.next();
159                var4 = var3.x;
160                var5 = var3.y;
161                var6 = var3.z;
162                var7 = this.worldObj.getBlockId(var4, var5, var6);
163    
164                if (par1)
165                {
166                    double var8 = (double)((float)var4 + this.worldObj.rand.nextFloat());
167                    double var10 = (double)((float)var5 + this.worldObj.rand.nextFloat());
168                    double var12 = (double)((float)var6 + this.worldObj.rand.nextFloat());
169                    double var14 = var8 - this.explosionX;
170                    double var16 = var10 - this.explosionY;
171                    double var18 = var12 - this.explosionZ;
172                    double var20 = (double)MathHelper.sqrt_double(var14 * var14 + var16 * var16 + var18 * var18);
173                    var14 /= var20;
174                    var16 /= var20;
175                    var18 /= var20;
176                    double var22 = 0.5D / (var20 / (double)this.explosionSize + 0.1D);
177                    var22 *= (double)(this.worldObj.rand.nextFloat() * this.worldObj.rand.nextFloat() + 0.3F);
178                    var14 *= var22;
179                    var16 *= var22;
180                    var18 *= var22;
181                    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);
182                    this.worldObj.spawnParticle("smoke", var8, var10, var12, var14, var16, var18);
183                }
184    
185                if (var7 > 0)
186                {
187                    Block.blocksList[var7].dropBlockAsItemWithChance(this.worldObj, var4, var5, var6, this.worldObj.getBlockMetadata(var4, var5, var6), 0.3F, 0);
188    
189                    if (this.worldObj.setBlockAndMetadataWithUpdate(var4, var5, var6, 0, 0, this.worldObj.isRemote))
190                    {
191                        this.worldObj.notifyBlocksOfNeighborChange(var4, var5, var6, 0);
192                    }
193    
194                    Block.blocksList[var7].onBlockDestroyedByExplosion(this.worldObj, var4, var5, var6);
195                }
196            }
197    
198            if (this.isFlaming)
199            {
200                var2 = this.field_77281_g.iterator();
201    
202                while (var2.hasNext())
203                {
204                    var3 = (ChunkPosition)var2.next();
205                    var4 = var3.x;
206                    var5 = var3.y;
207                    var6 = var3.z;
208                    var7 = this.worldObj.getBlockId(var4, var5, var6);
209                    int var24 = this.worldObj.getBlockId(var4, var5 - 1, var6);
210    
211                    if (var7 == 0 && Block.opaqueCubeLookup[var24] && this.explosionRNG.nextInt(3) == 0)
212                    {
213                        this.worldObj.setBlockWithNotify(var4, var5, var6, Block.fire.blockID);
214                    }
215                }
216            }
217        }
218    
219        public Map func_77277_b()
220        {
221            return this.field_77288_k;
222        }
223    }