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.entity.Entity;
012 import net.minecraft.entity.player.EntityPlayer;
013 import net.minecraft.util.AxisAlignedBB;
014 import net.minecraft.util.DamageSource;
015 import net.minecraft.util.MathHelper;
016 import net.minecraft.util.Vec3;
017
018 public class Explosion
019 {
020 /** whether or not the explosion sets fire to blocks around it */
021 public boolean isFlaming = false;
022
023 /** whether or not this explosion spawns smoke particles */
024 public boolean isSmoking = true;
025 private int field_77289_h = 16;
026 private Random explosionRNG = new Random();
027 private World worldObj;
028 public double explosionX;
029 public double explosionY;
030 public double explosionZ;
031 public Entity exploder;
032 public float explosionSize;
033
034 /** A list of ChunkPositions of blocks affected by this explosion */
035 public List affectedBlockPositions = new ArrayList();
036 private Map field_77288_k = new HashMap();
037
038 public Explosion(World par1World, Entity par2Entity, double par3, double par5, double par7, float par9)
039 {
040 this.worldObj = par1World;
041 this.exploder = par2Entity;
042 this.explosionSize = par9;
043 this.explosionX = par3;
044 this.explosionY = par5;
045 this.explosionZ = par7;
046 }
047
048 /**
049 * Does the first part of the explosion (destroy blocks)
050 */
051 public void doExplosionA()
052 {
053 float var1 = this.explosionSize;
054 HashSet var2 = new HashSet();
055 int var3;
056 int var4;
057 int var5;
058 double var15;
059 double var17;
060 double var19;
061
062 for (var3 = 0; var3 < this.field_77289_h; ++var3)
063 {
064 for (var4 = 0; var4 < this.field_77289_h; ++var4)
065 {
066 for (var5 = 0; var5 < this.field_77289_h; ++var5)
067 {
068 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)
069 {
070 double var6 = (double)((float)var3 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
071 double var8 = (double)((float)var4 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
072 double var10 = (double)((float)var5 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
073 double var12 = Math.sqrt(var6 * var6 + var8 * var8 + var10 * var10);
074 var6 /= var12;
075 var8 /= var12;
076 var10 /= var12;
077 float var14 = this.explosionSize * (0.7F + this.worldObj.rand.nextFloat() * 0.6F);
078 var15 = this.explosionX;
079 var17 = this.explosionY;
080 var19 = this.explosionZ;
081
082 for (float var21 = 0.3F; var14 > 0.0F; var14 -= var21 * 0.75F)
083 {
084 int var22 = MathHelper.floor_double(var15);
085 int var23 = MathHelper.floor_double(var17);
086 int var24 = MathHelper.floor_double(var19);
087 int var25 = this.worldObj.getBlockId(var22, var23, var24);
088
089 if (var25 > 0)
090 {
091 Block var26 = Block.blocksList[var25];
092 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);
093 var14 -= (var27 + 0.3F) * var21;
094 }
095
096 if (var14 > 0.0F)
097 {
098 var2.add(new ChunkPosition(var22, var23, var24));
099 }
100
101 var15 += var6 * (double)var21;
102 var17 += var8 * (double)var21;
103 var19 += var10 * (double)var21;
104 }
105 }
106 }
107 }
108 }
109
110 this.affectedBlockPositions.addAll(var2);
111 this.explosionSize *= 2.0F;
112 var3 = MathHelper.floor_double(this.explosionX - (double)this.explosionSize - 1.0D);
113 var4 = MathHelper.floor_double(this.explosionX + (double)this.explosionSize + 1.0D);
114 var5 = MathHelper.floor_double(this.explosionY - (double)this.explosionSize - 1.0D);
115 int var28 = MathHelper.floor_double(this.explosionY + (double)this.explosionSize + 1.0D);
116 int var7 = MathHelper.floor_double(this.explosionZ - (double)this.explosionSize - 1.0D);
117 int var29 = MathHelper.floor_double(this.explosionZ + (double)this.explosionSize + 1.0D);
118 List var9 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this.exploder, AxisAlignedBB.getAABBPool().addOrModifyAABBInPool((double)var3, (double)var5, (double)var7, (double)var4, (double)var28, (double)var29));
119 Vec3 var30 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.explosionX, this.explosionY, this.explosionZ);
120
121 for (int var11 = 0; var11 < var9.size(); ++var11)
122 {
123 Entity var31 = (Entity)var9.get(var11);
124 double var13 = var31.getDistance(this.explosionX, this.explosionY, this.explosionZ) / (double)this.explosionSize;
125
126 if (var13 <= 1.0D)
127 {
128 var15 = var31.posX - this.explosionX;
129 var17 = var31.posY + (double)var31.getEyeHeight() - this.explosionY;
130 var19 = var31.posZ - this.explosionZ;
131 double var33 = (double)MathHelper.sqrt_double(var15 * var15 + var17 * var17 + var19 * var19);
132
133 if (var33 != 0.0D)
134 {
135 var15 /= var33;
136 var17 /= var33;
137 var19 /= var33;
138 double var32 = (double)this.worldObj.getBlockDensity(var30, var31.boundingBox);
139 double var34 = (1.0D - var13) * var32;
140 var31.attackEntityFrom(DamageSource.explosion, (int)((var34 * var34 + var34) / 2.0D * 8.0D * (double)this.explosionSize + 1.0D));
141 var31.motionX += var15 * var34;
142 var31.motionY += var17 * var34;
143 var31.motionZ += var19 * var34;
144
145 if (var31 instanceof EntityPlayer)
146 {
147 this.field_77288_k.put((EntityPlayer)var31, this.worldObj.getWorldVec3Pool().getVecFromPool(var15 * var34, var17 * var34, var19 * var34));
148 }
149 }
150 }
151 }
152
153 this.explosionSize = var1;
154 }
155
156 /**
157 * Does the second part of the explosion (sound, particles, drop spawn)
158 */
159 public void doExplosionB(boolean par1)
160 {
161 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);
162
163 if (this.explosionSize >= 2.0F && this.isSmoking)
164 {
165 this.worldObj.spawnParticle("hugeexplosion", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D);
166 }
167 else
168 {
169 this.worldObj.spawnParticle("largeexplode", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D);
170 }
171
172 Iterator var2;
173 ChunkPosition var3;
174 int var4;
175 int var5;
176 int var6;
177 int var7;
178
179 if (this.isSmoking)
180 {
181 var2 = this.affectedBlockPositions.iterator();
182
183 while (var2.hasNext())
184 {
185 var3 = (ChunkPosition)var2.next();
186 var4 = var3.x;
187 var5 = var3.y;
188 var6 = var3.z;
189 var7 = this.worldObj.getBlockId(var4, var5, var6);
190
191 if (par1)
192 {
193 double var8 = (double)((float)var4 + this.worldObj.rand.nextFloat());
194 double var10 = (double)((float)var5 + this.worldObj.rand.nextFloat());
195 double var12 = (double)((float)var6 + this.worldObj.rand.nextFloat());
196 double var14 = var8 - this.explosionX;
197 double var16 = var10 - this.explosionY;
198 double var18 = var12 - this.explosionZ;
199 double var20 = (double)MathHelper.sqrt_double(var14 * var14 + var16 * var16 + var18 * var18);
200 var14 /= var20;
201 var16 /= var20;
202 var18 /= var20;
203 double var22 = 0.5D / (var20 / (double)this.explosionSize + 0.1D);
204 var22 *= (double)(this.worldObj.rand.nextFloat() * this.worldObj.rand.nextFloat() + 0.3F);
205 var14 *= var22;
206 var16 *= var22;
207 var18 *= var22;
208 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);
209 this.worldObj.spawnParticle("smoke", var8, var10, var12, var14, var16, var18);
210 }
211
212 if (var7 > 0)
213 {
214 Block var25 = Block.blocksList[var7];
215
216 if (var25.func_85103_a(this))
217 {
218 var25.dropBlockAsItemWithChance(this.worldObj, var4, var5, var6, this.worldObj.getBlockMetadata(var4, var5, var6), 0.3F, 0);
219 }
220
221 if (this.worldObj.setBlockAndMetadataWithUpdate(var4, var5, var6, 0, 0, this.worldObj.isRemote))
222 {
223 this.worldObj.notifyBlocksOfNeighborChange(var4, var5, var6, 0);
224 }
225
226 var25.onBlockDestroyedByExplosion(this.worldObj, var4, var5, var6);
227 }
228 }
229 }
230
231 if (this.isFlaming)
232 {
233 var2 = this.affectedBlockPositions.iterator();
234
235 while (var2.hasNext())
236 {
237 var3 = (ChunkPosition)var2.next();
238 var4 = var3.x;
239 var5 = var3.y;
240 var6 = var3.z;
241 var7 = this.worldObj.getBlockId(var4, var5, var6);
242 int var24 = this.worldObj.getBlockId(var4, var5 - 1, var6);
243
244 if (var7 == 0 && Block.opaqueCubeLookup[var24] && this.explosionRNG.nextInt(3) == 0)
245 {
246 this.worldObj.setBlockWithNotify(var4, var5, var6, Block.fire.blockID);
247 }
248 }
249 }
250 }
251
252 public Map func_77277_b()
253 {
254 return this.field_77288_k;
255 }
256 }