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 }