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 }