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 public boolean field_82755_b = true;
016 private int field_77289_h = 16;
017 private Random explosionRNG = new Random();
018 private World worldObj;
019 public double explosionX;
020 public double explosionY;
021 public double explosionZ;
022 public Entity exploder;
023 public float explosionSize;
024 public List field_77281_g = new ArrayList();
025 private Map field_77288_k = new HashMap();
026
027 public Explosion(World par1World, Entity par2Entity, double par3, double par5, double par7, float par9)
028 {
029 this.worldObj = par1World;
030 this.exploder = par2Entity;
031 this.explosionSize = par9;
032 this.explosionX = par3;
033 this.explosionY = par5;
034 this.explosionZ = par7;
035 }
036
037 /**
038 * Does the first part of the explosion (destroy blocks)
039 */
040 public void doExplosionA()
041 {
042 float var1 = this.explosionSize;
043 HashSet var2 = new HashSet();
044 int var3;
045 int var4;
046 int var5;
047 double var15;
048 double var17;
049 double var19;
050
051 for (var3 = 0; var3 < this.field_77289_h; ++var3)
052 {
053 for (var4 = 0; var4 < this.field_77289_h; ++var4)
054 {
055 for (var5 = 0; var5 < this.field_77289_h; ++var5)
056 {
057 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)
058 {
059 double var6 = (double)((float)var3 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
060 double var8 = (double)((float)var4 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
061 double var10 = (double)((float)var5 / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F);
062 double var12 = Math.sqrt(var6 * var6 + var8 * var8 + var10 * var10);
063 var6 /= var12;
064 var8 /= var12;
065 var10 /= var12;
066 float var14 = this.explosionSize * (0.7F + this.worldObj.rand.nextFloat() * 0.6F);
067 var15 = this.explosionX;
068 var17 = this.explosionY;
069 var19 = this.explosionZ;
070
071 for (float var21 = 0.3F; var14 > 0.0F; var14 -= var21 * 0.75F)
072 {
073 int var22 = MathHelper.floor_double(var15);
074 int var23 = MathHelper.floor_double(var17);
075 int var24 = MathHelper.floor_double(var19);
076 int var25 = this.worldObj.getBlockId(var22, var23, var24);
077
078 if (var25 > 0)
079 {
080 Block var26 = Block.blocksList[var25];
081 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);
082 var14 -= (var27 + 0.3F) * var21;
083 }
084
085 if (var14 > 0.0F)
086 {
087 var2.add(new ChunkPosition(var22, var23, var24));
088 }
089
090 var15 += var6 * (double)var21;
091 var17 += var8 * (double)var21;
092 var19 += var10 * (double)var21;
093 }
094 }
095 }
096 }
097 }
098
099 this.field_77281_g.addAll(var2);
100 this.explosionSize *= 2.0F;
101 var3 = MathHelper.floor_double(this.explosionX - (double)this.explosionSize - 1.0D);
102 var4 = MathHelper.floor_double(this.explosionX + (double)this.explosionSize + 1.0D);
103 var5 = MathHelper.floor_double(this.explosionY - (double)this.explosionSize - 1.0D);
104 int var28 = MathHelper.floor_double(this.explosionY + (double)this.explosionSize + 1.0D);
105 int var7 = MathHelper.floor_double(this.explosionZ - (double)this.explosionSize - 1.0D);
106 int var29 = MathHelper.floor_double(this.explosionZ + (double)this.explosionSize + 1.0D);
107 List var9 = this.worldObj.getEntitiesWithinAABBExcludingEntity(this.exploder, AxisAlignedBB.getAABBPool().addOrModifyAABBInPool((double)var3, (double)var5, (double)var7, (double)var4, (double)var28, (double)var29));
108 Vec3 var30 = this.worldObj.func_82732_R().getVecFromPool(this.explosionX, this.explosionY, this.explosionZ);
109
110 for (int var11 = 0; var11 < var9.size(); ++var11)
111 {
112 Entity var31 = (Entity)var9.get(var11);
113 double var13 = var31.getDistance(this.explosionX, this.explosionY, this.explosionZ) / (double)this.explosionSize;
114
115 if (var13 <= 1.0D)
116 {
117 var15 = var31.posX - this.explosionX;
118 var17 = var31.posY + (double)var31.getEyeHeight() - this.explosionY;
119 var19 = var31.posZ - this.explosionZ;
120 double var33 = (double)MathHelper.sqrt_double(var15 * var15 + var17 * var17 + var19 * var19);
121
122 if (var33 != 0.0D)
123 {
124 var15 /= var33;
125 var17 /= var33;
126 var19 /= var33;
127 double var32 = (double)this.worldObj.getBlockDensity(var30, var31.boundingBox);
128 double var34 = (1.0D - var13) * var32;
129 var31.attackEntityFrom(DamageSource.explosion, (int)((var34 * var34 + var34) / 2.0D * 8.0D * (double)this.explosionSize + 1.0D));
130 var31.motionX += var15 * var34;
131 var31.motionY += var17 * var34;
132 var31.motionZ += var19 * var34;
133
134 if (var31 instanceof EntityPlayer)
135 {
136 this.field_77288_k.put((EntityPlayer)var31, this.worldObj.func_82732_R().getVecFromPool(var15 * var34, var17 * var34, var19 * var34));
137 }
138 }
139 }
140 }
141
142 this.explosionSize = var1;
143 }
144
145 /**
146 * Does the second part of the explosion (sound, particles, drop spawn)
147 */
148 public void doExplosionB(boolean par1)
149 {
150 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);
151
152 if (this.explosionSize >= 2.0F && this.field_82755_b)
153 {
154 this.worldObj.spawnParticle("hugeexplosion", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D);
155 }
156 else
157 {
158 this.worldObj.spawnParticle("largeexplode", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D);
159 }
160
161 Iterator var2;
162 ChunkPosition var3;
163 int var4;
164 int var5;
165 int var6;
166 int var7;
167
168 if (this.field_82755_b)
169 {
170 var2 = this.field_77281_g.iterator();
171
172 while (var2.hasNext())
173 {
174 var3 = (ChunkPosition)var2.next();
175 var4 = var3.x;
176 var5 = var3.y;
177 var6 = var3.z;
178 var7 = this.worldObj.getBlockId(var4, var5, var6);
179
180 if (par1)
181 {
182 double var8 = (double)((float)var4 + this.worldObj.rand.nextFloat());
183 double var10 = (double)((float)var5 + this.worldObj.rand.nextFloat());
184 double var12 = (double)((float)var6 + this.worldObj.rand.nextFloat());
185 double var14 = var8 - this.explosionX;
186 double var16 = var10 - this.explosionY;
187 double var18 = var12 - this.explosionZ;
188 double var20 = (double)MathHelper.sqrt_double(var14 * var14 + var16 * var16 + var18 * var18);
189 var14 /= var20;
190 var16 /= var20;
191 var18 /= var20;
192 double var22 = 0.5D / (var20 / (double)this.explosionSize + 0.1D);
193 var22 *= (double)(this.worldObj.rand.nextFloat() * this.worldObj.rand.nextFloat() + 0.3F);
194 var14 *= var22;
195 var16 *= var22;
196 var18 *= var22;
197 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);
198 this.worldObj.spawnParticle("smoke", var8, var10, var12, var14, var16, var18);
199 }
200
201 if (var7 > 0)
202 {
203 Block.blocksList[var7].dropBlockAsItemWithChance(this.worldObj, var4, var5, var6, this.worldObj.getBlockMetadata(var4, var5, var6), 0.3F, 0);
204
205 if (this.worldObj.setBlockAndMetadataWithUpdate(var4, var5, var6, 0, 0, this.worldObj.isRemote))
206 {
207 this.worldObj.notifyBlocksOfNeighborChange(var4, var5, var6, 0);
208 }
209
210 Block.blocksList[var7].onBlockDestroyedByExplosion(this.worldObj, var4, var5, var6);
211 }
212 }
213 }
214
215 if (this.isFlaming)
216 {
217 var2 = this.field_77281_g.iterator();
218
219 while (var2.hasNext())
220 {
221 var3 = (ChunkPosition)var2.next();
222 var4 = var3.x;
223 var5 = var3.y;
224 var6 = var3.z;
225 var7 = this.worldObj.getBlockId(var4, var5, var6);
226 int var24 = this.worldObj.getBlockId(var4, var5 - 1, var6);
227
228 if (var7 == 0 && Block.opaqueCubeLookup[var24] && this.explosionRNG.nextInt(3) == 0)
229 {
230 this.worldObj.setBlockWithNotify(var4, var5, var6, Block.fire.blockID);
231 }
232 }
233 }
234 }
235
236 public Map func_77277_b()
237 {
238 return this.field_77288_k;
239 }
240 }