001package net.minecraft.world; 002 003import java.util.ArrayList; 004import java.util.HashMap; 005import java.util.HashSet; 006import java.util.Iterator; 007import java.util.List; 008import java.util.Map; 009import java.util.Random; 010import net.minecraft.block.Block; 011import net.minecraft.enchantment.EnchantmentProtection; 012import net.minecraft.entity.Entity; 013import net.minecraft.entity.EntityLiving; 014import net.minecraft.entity.item.EntityTNTPrimed; 015import net.minecraft.entity.player.EntityPlayer; 016import net.minecraft.util.AxisAlignedBB; 017import net.minecraft.util.DamageSource; 018import net.minecraft.util.MathHelper; 019import net.minecraft.util.Vec3; 020 021public class Explosion 022{ 023 /** whether or not the explosion sets fire to blocks around it */ 024 public boolean isFlaming = false; 025 026 /** whether or not this explosion spawns smoke particles */ 027 public boolean isSmoking = true; 028 private int field_77289_h = 16; 029 private Random explosionRNG = new Random(); 030 private World worldObj; 031 public double explosionX; 032 public double explosionY; 033 public double explosionZ; 034 public Entity exploder; 035 public float explosionSize; 036 037 /** A list of ChunkPositions of blocks affected by this explosion */ 038 public List affectedBlockPositions = new ArrayList(); 039 private Map field_77288_k = new HashMap(); 040 041 public Explosion(World par1World, Entity par2Entity, double par3, double par5, double par7, float par9) 042 { 043 this.worldObj = par1World; 044 this.exploder = par2Entity; 045 this.explosionSize = par9; 046 this.explosionX = par3; 047 this.explosionY = par5; 048 this.explosionZ = par7; 049 } 050 051 /** 052 * Does the first part of the explosion (destroy blocks) 053 */ 054 public void doExplosionA() 055 { 056 float f = this.explosionSize; 057 HashSet hashset = new HashSet(); 058 int i; 059 int j; 060 int k; 061 double d0; 062 double d1; 063 double d2; 064 065 for (i = 0; i < this.field_77289_h; ++i) 066 { 067 for (j = 0; j < this.field_77289_h; ++j) 068 { 069 for (k = 0; k < this.field_77289_h; ++k) 070 { 071 if (i == 0 || i == this.field_77289_h - 1 || j == 0 || j == this.field_77289_h - 1 || k == 0 || k == this.field_77289_h - 1) 072 { 073 double d3 = (double)((float)i / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F); 074 double d4 = (double)((float)j / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F); 075 double d5 = (double)((float)k / ((float)this.field_77289_h - 1.0F) * 2.0F - 1.0F); 076 double d6 = Math.sqrt(d3 * d3 + d4 * d4 + d5 * d5); 077 d3 /= d6; 078 d4 /= d6; 079 d5 /= d6; 080 float f1 = this.explosionSize * (0.7F + this.worldObj.rand.nextFloat() * 0.6F); 081 d0 = this.explosionX; 082 d1 = this.explosionY; 083 d2 = this.explosionZ; 084 085 for (float f2 = 0.3F; f1 > 0.0F; f1 -= f2 * 0.75F) 086 { 087 int l = MathHelper.floor_double(d0); 088 int i1 = MathHelper.floor_double(d1); 089 int j1 = MathHelper.floor_double(d2); 090 int k1 = this.worldObj.getBlockId(l, i1, j1); 091 092 if (k1 > 0) 093 { 094 Block block = Block.blocksList[k1]; 095 float f3 = this.exploder != null ? this.exploder.func_82146_a(this, this.worldObj, l, i1, j1, block) : block.getExplosionResistance(this.exploder, worldObj, l, i1, j1, explosionX, explosionY, explosionZ); 096 f1 -= (f3 + 0.3F) * f2; 097 } 098 099 if (f1 > 0.0F && (this.exploder == null || this.exploder.func_96091_a(this, this.worldObj, l, i1, j1, k1, f1))) 100 { 101 hashset.add(new ChunkPosition(l, i1, j1)); 102 } 103 104 d0 += d3 * (double)f2; 105 d1 += d4 * (double)f2; 106 d2 += d5 * (double)f2; 107 } 108 } 109 } 110 } 111 } 112 113 this.affectedBlockPositions.addAll(hashset); 114 this.explosionSize *= 2.0F; 115 i = MathHelper.floor_double(this.explosionX - (double)this.explosionSize - 1.0D); 116 j = MathHelper.floor_double(this.explosionX + (double)this.explosionSize + 1.0D); 117 k = MathHelper.floor_double(this.explosionY - (double)this.explosionSize - 1.0D); 118 int l1 = MathHelper.floor_double(this.explosionY + (double)this.explosionSize + 1.0D); 119 int i2 = MathHelper.floor_double(this.explosionZ - (double)this.explosionSize - 1.0D); 120 int j2 = MathHelper.floor_double(this.explosionZ + (double)this.explosionSize + 1.0D); 121 List list = this.worldObj.getEntitiesWithinAABBExcludingEntity(this.exploder, AxisAlignedBB.getAABBPool().getAABB((double)i, (double)k, (double)i2, (double)j, (double)l1, (double)j2)); 122 Vec3 vec3 = this.worldObj.getWorldVec3Pool().getVecFromPool(this.explosionX, this.explosionY, this.explosionZ); 123 124 for (int k2 = 0; k2 < list.size(); ++k2) 125 { 126 Entity entity = (Entity)list.get(k2); 127 double d7 = entity.getDistance(this.explosionX, this.explosionY, this.explosionZ) / (double)this.explosionSize; 128 129 if (d7 <= 1.0D) 130 { 131 d0 = entity.posX - this.explosionX; 132 d1 = entity.posY + (double)entity.getEyeHeight() - this.explosionY; 133 d2 = entity.posZ - this.explosionZ; 134 double d8 = (double)MathHelper.sqrt_double(d0 * d0 + d1 * d1 + d2 * d2); 135 136 if (d8 != 0.0D) 137 { 138 d0 /= d8; 139 d1 /= d8; 140 d2 /= d8; 141 double d9 = (double)this.worldObj.getBlockDensity(vec3, entity.boundingBox); 142 double d10 = (1.0D - d7) * d9; 143 entity.attackEntityFrom(DamageSource.setExplosionSource(this), (int)((d10 * d10 + d10) / 2.0D * 8.0D * (double)this.explosionSize + 1.0D)); 144 double d11 = EnchantmentProtection.func_92092_a(entity, d10); 145 entity.motionX += d0 * d11; 146 entity.motionY += d1 * d11; 147 entity.motionZ += d2 * d11; 148 149 if (entity instanceof EntityPlayer) 150 { 151 this.field_77288_k.put((EntityPlayer)entity, this.worldObj.getWorldVec3Pool().getVecFromPool(d0 * d10, d1 * d10, d2 * d10)); 152 } 153 } 154 } 155 } 156 157 this.explosionSize = f; 158 } 159 160 /** 161 * Does the second part of the explosion (sound, particles, drop spawn) 162 */ 163 public void doExplosionB(boolean par1) 164 { 165 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); 166 167 if (this.explosionSize >= 2.0F && this.isSmoking) 168 { 169 this.worldObj.spawnParticle("hugeexplosion", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D); 170 } 171 else 172 { 173 this.worldObj.spawnParticle("largeexplode", this.explosionX, this.explosionY, this.explosionZ, 1.0D, 0.0D, 0.0D); 174 } 175 176 Iterator iterator; 177 ChunkPosition chunkposition; 178 int i; 179 int j; 180 int k; 181 int l; 182 183 if (this.isSmoking) 184 { 185 iterator = this.affectedBlockPositions.iterator(); 186 187 while (iterator.hasNext()) 188 { 189 chunkposition = (ChunkPosition)iterator.next(); 190 i = chunkposition.x; 191 j = chunkposition.y; 192 k = chunkposition.z; 193 l = this.worldObj.getBlockId(i, j, k); 194 195 if (par1) 196 { 197 double d0 = (double)((float)i + this.worldObj.rand.nextFloat()); 198 double d1 = (double)((float)j + this.worldObj.rand.nextFloat()); 199 double d2 = (double)((float)k + this.worldObj.rand.nextFloat()); 200 double d3 = d0 - this.explosionX; 201 double d4 = d1 - this.explosionY; 202 double d5 = d2 - this.explosionZ; 203 double d6 = (double)MathHelper.sqrt_double(d3 * d3 + d4 * d4 + d5 * d5); 204 d3 /= d6; 205 d4 /= d6; 206 d5 /= d6; 207 double d7 = 0.5D / (d6 / (double)this.explosionSize + 0.1D); 208 d7 *= (double)(this.worldObj.rand.nextFloat() * this.worldObj.rand.nextFloat() + 0.3F); 209 d3 *= d7; 210 d4 *= d7; 211 d5 *= d7; 212 this.worldObj.spawnParticle("explode", (d0 + this.explosionX * 1.0D) / 2.0D, (d1 + this.explosionY * 1.0D) / 2.0D, (d2 + this.explosionZ * 1.0D) / 2.0D, d3, d4, d5); 213 this.worldObj.spawnParticle("smoke", d0, d1, d2, d3, d4, d5); 214 } 215 216 if (l > 0) 217 { 218 Block block = Block.blocksList[l]; 219 220 if (block.canDropFromExplosion(this)) 221 { 222 block.dropBlockAsItemWithChance(this.worldObj, i, j, k, this.worldObj.getBlockMetadata(i, j, k), 1.0F / this.explosionSize, 0); 223 } 224 225 this.worldObj.setBlock(i, j, k, 0, 0, 3); 226 block.onBlockDestroyedByExplosion(this.worldObj, i, j, k, this); 227 } 228 } 229 } 230 231 if (this.isFlaming) 232 { 233 iterator = this.affectedBlockPositions.iterator(); 234 235 while (iterator.hasNext()) 236 { 237 chunkposition = (ChunkPosition)iterator.next(); 238 i = chunkposition.x; 239 j = chunkposition.y; 240 k = chunkposition.z; 241 l = this.worldObj.getBlockId(i, j, k); 242 int i1 = this.worldObj.getBlockId(i, j - 1, k); 243 244 if (l == 0 && Block.opaqueCubeLookup[i1] && this.explosionRNG.nextInt(3) == 0) 245 { 246 this.worldObj.setBlock(i, j, k, Block.fire.blockID); 247 } 248 } 249 } 250 } 251 252 public Map func_77277_b() 253 { 254 return this.field_77288_k; 255 } 256 257 public EntityLiving func_94613_c() 258 { 259 return this.exploder == null ? null : (this.exploder instanceof EntityTNTPrimed ? ((EntityTNTPrimed)this.exploder).func_94083_c() : (this.exploder instanceof EntityLiving ? (EntityLiving)this.exploder : null)); 260 } 261}