001package net.minecraft.world;
002
003import java.util.ArrayList;
004import java.util.HashMap;
005import java.util.HashSet;
006import java.util.Iterator;
007import java.util.List;
008import java.util.Map;
009import java.util.Random;
010import net.minecraft.block.Block;
011import net.minecraft.enchantment.EnchantmentProtection;
012import net.minecraft.entity.Entity;
013import net.minecraft.entity.player.EntityPlayer;
014import net.minecraft.util.AxisAlignedBB;
015import net.minecraft.util.DamageSource;
016import net.minecraft.util.MathHelper;
017import net.minecraft.util.Vec3;
018
019public 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_92092_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}