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    
016        /** whether or not this explosion spawns smoke particles */
017        public boolean isSmoking = true;
018        private int field_77289_h = 16;
019        private Random explosionRNG = new Random();
020        private World worldObj;
021        public double explosionX;
022        public double explosionY;
023        public double explosionZ;
024        public Entity exploder;
025        public float explosionSize;
026    
027        /** A list of ChunkPositions of blocks affected by this explosion */
028        public List affectedBlockPositions = new ArrayList();
029        private Map field_77288_k = new HashMap();
030    
031        public Explosion(World par1World, Entity par2Entity, double par3, double par5, double par7, float par9)
032        {
033            this.worldObj = par1World;
034            this.exploder = par2Entity;
035            this.explosionSize = par9;
036            this.explosionX = par3;
037            this.explosionY = par5;
038            this.explosionZ = par7;
039        }
040    
041        /**
042         * Does the first part of the explosion (destroy blocks)
043         */
044        public void doExplosionA()
045        {
046            float var1 = this.explosionSize;
047            HashSet var2 = new HashSet();
048            int var3;
049            int var4;
050            int var5;
051            double var15;
052            double var17;
053            double var19;
054    
055            for (var3 = 0; var3 < this.field_77289_h; ++var3)
056            {
057                for (var4 = 0; var4 < this.field_77289_h; ++var4)
058                {
059                    for (var5 = 0; var5 < this.field_77289_h; ++var5)
060                    {
061                        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)
062                        {
063                            double var6 = (double)((float)var3 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
064                            double var8 = (double)((float)var4 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
065                            double var10 = (double)((float)var5 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
066                            double var12 = Math.sqrt(var6 * var6 + var8 * var8 + var10 * var10);
067                            var6 /= var12;
068                            var8 /= var12;
069                            var10 /= var12;
070                            float var14 = this.explosionSize * (0.7F + this.worldObj.rand.nextFloat() * 0.6F);
071                            var15 = this.explosionX;
072                            var17 = this.explosionY;
073                            var19 = this.explosionZ;
074    
075                            for (float var21 = 0.3F; var14 > 0.0F; var14 -= var21 * 0.75F)
076                            {
077                                int var22 = MathHelper.floor_double(var15);
078                                int var23 = MathHelper.floor_double(var17);
079                                int var24 = MathHelper.floor_double(var19);
080                                int var25 = this.worldObj.getBlockId(var22, var23, var24);
081    
082                                if (var25 > 0)
083                                {
084                                    Block var26 = Block.blocksList[var25];
085                                    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);
086                                    var14 -= (var27 + 0.3F) * var21;
087                                }
088    
089                                if (var14 > 0.0F)
090                                {
091                                    var2.add(new ChunkPosition(var22, var23, var24));
092                                }
093    
094                                var15 += var6 * (double)var21;
095                                var17 += var8 * (double)var21;
096                                var19 += var10 * (double)var21;
097                            }
098                        }
099                    }
100                }
101            }
102    
103            this.affectedBlockPositions.addAll(var2);
104            this.explosionSize *= 2.0F;
105            var3 = MathHelper.floor_double(this.explosionX - (double)this.explosionSize - 1.0D);
106            var4 = MathHelper.floor_double(this.explosionX + (double)this.explosionSize + 1.0D);
107            var5 = MathHelper.floor_double(this.explosionY - (double)this.explosionSize - 1.0D);
108            int var28 = MathHelper.floor_double(this.explosionY + (double)this.explosionSize + 1.0D);
109            int var7 = MathHelper.floor_double(this.explosionZ - (double)this.explosionSize - 1.0D);
110            int var29 = MathHelper.floor_double(this.explosionZ + (double)this.explosionSize + 1.0D);
111            List var9 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this.exploder, AxisAlignedBB.getAABBPool().addOrModifyAABBInPool((double)var3, (double)var5, (double)var7, (double)var4, (double)var28, (double)var29));
112            Vec3 var30 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.explosionX, this.explosionY, this.explosionZ);
113    
114            for (int var11 = 0; var11 < var9.size(); ++var11)
115            {
116                Entity var31 = (Entity)var9.get(var11);
117                double var13 = var31.getDistance(this.explosionX, this.explosionY, this.explosionZ) / (double)this.explosionSize;
118    
119                if (var13 <= 1.0D)
120                {
121                    var15 = var31.posX - this.explosionX;
122                    var17 = var31.posY + (double)var31.getEyeHeight() - this.explosionY;
123                    var19 = var31.posZ - this.explosionZ;
124                    double var33 = (double)MathHelper.sqrt_double(var15 * var15 + var17 * var17 + var19 * var19);
125    
126                    if (var33 != 0.0D)
127                    {
128                        var15 /= var33;
129                        var17 /= var33;
130                        var19 /= var33;
131                        double var32 = (double)this.worldObj.getBlockDensity(var30, var31.boundingBox);
132                        double var34 = (1.0D - var13) * var32;
133                        var31.attackEntityFrom(DamageSource.explosion, (int)((var34 * var34 + var34) / 2.0D * 8.0D * (double)this.explosionSize + 1.0D));
134                        var31.motionX += var15 * var34;
135                        var31.motionY += var17 * var34;
136                        var31.motionZ += var19 * var34;
137    
138                        if (var31 instanceof EntityPlayer)
139                        {
140                            this.field_77288_k.put((EntityPlayer)var31, this.worldObj.getWorldVec3Pool().getVecFromPool(var15 * var34, var17 * var34, var19 * var34));
141                        }
142                    }
143                }
144            }
145    
146            this.explosionSize = var1;
147        }
148    
149        /**
150         * Does the second part of the explosion (sound, particles, drop spawn)
151         */
152        public void doExplosionB(boolean par1)
153        {
154            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);
155    
156            if (this.explosionSize >= 2.0F && this.isSmoking)
157            {
158                this.worldObj.spawnParticle("hugeexplosion", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D);
159            }
160            else
161            {
162                this.worldObj.spawnParticle("largeexplode", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D);
163            }
164    
165            Iterator var2;
166            ChunkPosition var3;
167            int var4;
168            int var5;
169            int var6;
170            int var7;
171    
172            if (this.isSmoking)
173            {
174                var2 = this.affectedBlockPositions.iterator();
175    
176                while (var2.hasNext())
177                {
178                    var3 = (ChunkPosition)var2.next();
179                    var4 = var3.x;
180                    var5 = var3.y;
181                    var6 = var3.z;
182                    var7 = this.worldObj.getBlockId(var4, var5, var6);
183    
184                    if (par1)
185                    {
186                        double var8 = (double)((float)var4 + this.worldObj.rand.nextFloat());
187                        double var10 = (double)((float)var5 + this.worldObj.rand.nextFloat());
188                        double var12 = (double)((float)var6 + this.worldObj.rand.nextFloat());
189                        double var14 = var8 - this.explosionX;
190                        double var16 = var10 - this.explosionY;
191                        double var18 = var12 - this.explosionZ;
192                        double var20 = (double)MathHelper.sqrt_double(var14 * var14 + var16 * var16 + var18 * var18);
193                        var14 /= var20;
194                        var16 /= var20;
195                        var18 /= var20;
196                        double var22 = 0.5D / (var20 / (double)this.explosionSize + 0.1D);
197                        var22 *= (double)(this.worldObj.rand.nextFloat() * this.worldObj.rand.nextFloat() + 0.3F);
198                        var14 *= var22;
199                        var16 *= var22;
200                        var18 *= var22;
201                        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);
202                        this.worldObj.spawnParticle("smoke", var8, var10, var12, var14, var16, var18);
203                    }
204    
205                    if (var7 > 0)
206                    {
207                        Block.blocksList[var7].dropBlockAsItemWithChance(this.worldObj, var4, var5, var6, this.worldObj.getBlockMetadata(var4, var5, var6), 0.3F, 0);
208    
209                        if (this.worldObj.setBlockAndMetadataWithUpdate(var4, var5, var6, 0, 0, this.worldObj.isRemote))
210                        {
211                            this.worldObj.notifyBlocksOfNeighborChange(var4, var5, var6, 0);
212                        }
213    
214                        Block.blocksList[var7].onBlockDestroyedByExplosion(this.worldObj, var4, var5, var6);
215                    }
216                }
217            }
218    
219            if (this.isFlaming)
220            {
221                var2 = this.affectedBlockPositions.iterator();
222    
223                while (var2.hasNext())
224                {
225                    var3 = (ChunkPosition)var2.next();
226                    var4 = var3.x;
227                    var5 = var3.y;
228                    var6 = var3.z;
229                    var7 = this.worldObj.getBlockId(var4, var5, var6);
230                    int var24 = this.worldObj.getBlockId(var4, var5 - 1, var6);
231    
232                    if (var7 == 0 && Block.opaqueCubeLookup[var24] && this.explosionRNG.nextInt(3) == 0)
233                    {
234                        this.worldObj.setBlockWithNotify(var4, var5, var6, Block.fire.blockID);
235                    }
236                }
237            }
238        }
239    
240        public Map func_77277_b()
241        {
242            return this.field_77288_k;
243        }
244    }