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 var25 = Block.blocksList[var7];
208
209 if (var25.func_85103_a(this))
210 {
211 var25.dropBlockAsItemWithChance(this.worldObj, var4, var5, var6, this.worldObj.getBlockMetadata(var4, var5, var6), 0.3F, 0);
212 }
213
214 if (this.worldObj.setBlockAndMetadataWithUpdate(var4, var5, var6, 0, 0, this.worldObj.isRemote))
215 {
216 this.worldObj.notifyBlocksOfNeighborChange(var4, var5, var6, 0);
217 }
218
219 var25.onBlockDestroyedByExplosion(this.worldObj, var4, var5, var6);
220 }
221 }
222 }
223
224 if (this.isFlaming)
225 {
226 var2 = this.affectedBlockPositions.iterator();
227
228 while (var2.hasNext())
229 {
230 var3 = (ChunkPosition)var2.next();
231 var4 = var3.x;
232 var5 = var3.y;
233 var6 = var3.z;
234 var7 = this.worldObj.getBlockId(var4, var5, var6);
235 int var24 = this.worldObj.getBlockId(var4, var5 - 1, var6);
236
237 if (var7 == 0 && Block.opaqueCubeLookup[var24] && this.explosionRNG.nextInt(3) == 0)
238 {
239 this.worldObj.setBlockWithNotify(var4, var5, var6, Block.fire.blockID);
240 }
241 }
242 }
243 }
244
245 public Map func_77277_b()
246 {
247 return this.field_77288_k;
248 }
249 }