001 package net.minecraft.src; 002 003 public class EntityGhast extends EntityFlying implements IMob 004 { 005 public int courseChangeCooldown = 0; 006 public double waypointX; 007 public double waypointY; 008 public double waypointZ; 009 private Entity targetedEntity = null; 010 011 /** Cooldown time between target loss and new target aquirement. */ 012 private int aggroCooldown = 0; 013 public int prevAttackCounter = 0; 014 public int attackCounter = 0; 015 016 public EntityGhast(World par1World) 017 { 018 super(par1World); 019 this.texture = "/mob/ghast.png"; 020 this.setSize(4.0F, 4.0F); 021 this.isImmuneToFire = true; 022 this.experienceValue = 5; 023 } 024 025 /** 026 * Called when the entity is attacked. 027 */ 028 public boolean attackEntityFrom(DamageSource par1DamageSource, int par2) 029 { 030 if ("fireball".equals(par1DamageSource.getDamageType()) && par1DamageSource.getEntity() instanceof EntityPlayer) 031 { 032 super.attackEntityFrom(par1DamageSource, 1000); 033 ((EntityPlayer)par1DamageSource.getEntity()).triggerAchievement(AchievementList.ghast); 034 return true; 035 } 036 else 037 { 038 return super.attackEntityFrom(par1DamageSource, par2); 039 } 040 } 041 042 protected void entityInit() 043 { 044 super.entityInit(); 045 this.dataWatcher.addObject(16, Byte.valueOf((byte)0)); 046 } 047 048 public int getMaxHealth() 049 { 050 return 10; 051 } 052 053 /** 054 * Called to update the entity's position/logic. 055 */ 056 public void onUpdate() 057 { 058 super.onUpdate(); 059 byte var1 = this.dataWatcher.getWatchableObjectByte(16); 060 this.texture = var1 == 1 ? "/mob/ghast_fire.png" : "/mob/ghast.png"; 061 } 062 063 protected void updateEntityActionState() 064 { 065 if (!this.worldObj.isRemote && this.worldObj.difficultySetting == 0) 066 { 067 this.setDead(); 068 } 069 070 this.despawnEntity(); 071 this.prevAttackCounter = this.attackCounter; 072 double var1 = this.waypointX - this.posX; 073 double var3 = this.waypointY - this.posY; 074 double var5 = this.waypointZ - this.posZ; 075 double var7 = var1 * var1 + var3 * var3 + var5 * var5; 076 077 if (var7 < 1.0D || var7 > 3600.0D) 078 { 079 this.waypointX = this.posX + (double)((this.rand.nextFloat() * 2.0F - 1.0F) * 16.0F); 080 this.waypointY = this.posY + (double)((this.rand.nextFloat() * 2.0F - 1.0F) * 16.0F); 081 this.waypointZ = this.posZ + (double)((this.rand.nextFloat() * 2.0F - 1.0F) * 16.0F); 082 } 083 084 if (this.courseChangeCooldown-- <= 0) 085 { 086 this.courseChangeCooldown += this.rand.nextInt(5) + 2; 087 var7 = (double)MathHelper.sqrt_double(var7); 088 089 if (this.isCourseTraversable(this.waypointX, this.waypointY, this.waypointZ, var7)) 090 { 091 this.motionX += var1 / var7 * 0.1D; 092 this.motionY += var3 / var7 * 0.1D; 093 this.motionZ += var5 / var7 * 0.1D; 094 } 095 else 096 { 097 this.waypointX = this.posX; 098 this.waypointY = this.posY; 099 this.waypointZ = this.posZ; 100 } 101 } 102 103 if (this.targetedEntity != null && this.targetedEntity.isDead) 104 { 105 this.targetedEntity = null; 106 } 107 108 if (this.targetedEntity == null || this.aggroCooldown-- <= 0) 109 { 110 this.targetedEntity = this.worldObj.getClosestVulnerablePlayerToEntity(this, 100.0D); 111 112 if (this.targetedEntity != null) 113 { 114 this.aggroCooldown = 20; 115 } 116 } 117 118 double var9 = 64.0D; 119 120 if (this.targetedEntity != null && this.targetedEntity.getDistanceSqToEntity(this) < var9 * var9) 121 { 122 double var11 = this.targetedEntity.posX - this.posX; 123 double var13 = this.targetedEntity.boundingBox.minY + (double)(this.targetedEntity.height / 2.0F) - (this.posY + (double)(this.height / 2.0F)); 124 double var15 = this.targetedEntity.posZ - this.posZ; 125 this.renderYawOffset = this.rotationYaw = -((float)Math.atan2(var11, var15)) * 180.0F / (float)Math.PI; 126 127 if (this.canEntityBeSeen(this.targetedEntity)) 128 { 129 if (this.attackCounter == 10) 130 { 131 this.worldObj.playAuxSFXAtEntity((EntityPlayer)null, 1007, (int)this.posX, (int)this.posY, (int)this.posZ, 0); 132 } 133 134 ++this.attackCounter; 135 136 if (this.attackCounter == 20) 137 { 138 this.worldObj.playAuxSFXAtEntity((EntityPlayer)null, 1008, (int)this.posX, (int)this.posY, (int)this.posZ, 0); 139 EntityLargeFireball var17 = new EntityLargeFireball(this.worldObj, this, var11, var13, var15); 140 double var18 = 4.0D; 141 Vec3 var20 = this.getLook(1.0F); 142 var17.posX = this.posX + var20.xCoord * var18; 143 var17.posY = this.posY + (double)(this.height / 2.0F) + 0.5D; 144 var17.posZ = this.posZ + var20.zCoord * var18; 145 this.worldObj.spawnEntityInWorld(var17); 146 this.attackCounter = -40; 147 } 148 } 149 else if (this.attackCounter > 0) 150 { 151 --this.attackCounter; 152 } 153 } 154 else 155 { 156 this.renderYawOffset = this.rotationYaw = -((float)Math.atan2(this.motionX, this.motionZ)) * 180.0F / (float)Math.PI; 157 158 if (this.attackCounter > 0) 159 { 160 --this.attackCounter; 161 } 162 } 163 164 if (!this.worldObj.isRemote) 165 { 166 byte var21 = this.dataWatcher.getWatchableObjectByte(16); 167 byte var12 = (byte)(this.attackCounter > 10 ? 1 : 0); 168 169 if (var21 != var12) 170 { 171 this.dataWatcher.updateObject(16, Byte.valueOf(var12)); 172 } 173 } 174 } 175 176 /** 177 * True if the ghast has an unobstructed line of travel to the waypoint. 178 */ 179 private boolean isCourseTraversable(double par1, double par3, double par5, double par7) 180 { 181 double var9 = (this.waypointX - this.posX) / par7; 182 double var11 = (this.waypointY - this.posY) / par7; 183 double var13 = (this.waypointZ - this.posZ) / par7; 184 AxisAlignedBB var15 = this.boundingBox.copy(); 185 186 for (int var16 = 1; (double)var16 < par7; ++var16) 187 { 188 var15.offset(var9, var11, var13); 189 190 if (!this.worldObj.getCollidingBoundingBoxes(this, var15).isEmpty()) 191 { 192 return false; 193 } 194 } 195 196 return true; 197 } 198 199 /** 200 * Returns the sound this mob makes while it's alive. 201 */ 202 protected String getLivingSound() 203 { 204 return "mob.ghast.moan"; 205 } 206 207 /** 208 * Returns the sound this mob makes when it is hurt. 209 */ 210 protected String getHurtSound() 211 { 212 return "mob.ghast.scream"; 213 } 214 215 /** 216 * Returns the sound this mob makes on death. 217 */ 218 protected String getDeathSound() 219 { 220 return "mob.ghast.death"; 221 } 222 223 /** 224 * Returns the item ID for the item the mob drops on death. 225 */ 226 protected int getDropItemId() 227 { 228 return Item.gunpowder.shiftedIndex; 229 } 230 231 /** 232 * Drop 0-2 items of this living's type 233 */ 234 protected void dropFewItems(boolean par1, int par2) 235 { 236 int var3 = this.rand.nextInt(2) + this.rand.nextInt(1 + par2); 237 int var4; 238 239 for (var4 = 0; var4 < var3; ++var4) 240 { 241 this.dropItem(Item.ghastTear.shiftedIndex, 1); 242 } 243 244 var3 = this.rand.nextInt(3) + this.rand.nextInt(1 + par2); 245 246 for (var4 = 0; var4 < var3; ++var4) 247 { 248 this.dropItem(Item.gunpowder.shiftedIndex, 1); 249 } 250 } 251 252 /** 253 * Returns the volume for the sounds this mob makes. 254 */ 255 protected float getSoundVolume() 256 { 257 return 10.0F; 258 } 259 260 /** 261 * Checks if the entity's current position is a valid location to spawn this entity. 262 */ 263 public boolean getCanSpawnHere() 264 { 265 return this.rand.nextInt(20) == 0 && super.getCanSpawnHere() && this.worldObj.difficultySetting > 0; 266 } 267 268 /** 269 * Will return how many at most can spawn in a chunk at once. 270 */ 271 public int getMaxSpawnedInChunk() 272 { 273 return 1; 274 } 275 }