001 package net.minecraft.entity.monster; 002 003 import net.minecraft.entity.Entity; 004 import net.minecraft.entity.EntityFlying; 005 import net.minecraft.entity.player.EntityPlayer; 006 import net.minecraft.entity.projectile.EntityLargeFireball; 007 import net.minecraft.item.Item; 008 import net.minecraft.stats.AchievementList; 009 import net.minecraft.util.AxisAlignedBB; 010 import net.minecraft.util.DamageSource; 011 import net.minecraft.util.MathHelper; 012 import net.minecraft.util.Vec3; 013 import net.minecraft.world.World; 014 015 public class EntityGhast extends EntityFlying implements IMob 016 { 017 public int courseChangeCooldown = 0; 018 public double waypointX; 019 public double waypointY; 020 public double waypointZ; 021 private Entity targetedEntity = null; 022 023 /** Cooldown time between target loss and new target aquirement. */ 024 private int aggroCooldown = 0; 025 public int prevAttackCounter = 0; 026 public int attackCounter = 0; 027 028 public EntityGhast(World par1World) 029 { 030 super(par1World); 031 this.texture = "/mob/ghast.png"; 032 this.setSize(4.0F, 4.0F); 033 this.isImmuneToFire = true; 034 this.experienceValue = 5; 035 } 036 037 /** 038 * Called when the entity is attacked. 039 */ 040 public boolean attackEntityFrom(DamageSource par1DamageSource, int par2) 041 { 042 if (this.func_85032_ar()) 043 { 044 return false; 045 } 046 else if ("fireball".equals(par1DamageSource.getDamageType()) && par1DamageSource.getEntity() instanceof EntityPlayer) 047 { 048 super.attackEntityFrom(par1DamageSource, 1000); 049 ((EntityPlayer)par1DamageSource.getEntity()).triggerAchievement(AchievementList.ghast); 050 return true; 051 } 052 else 053 { 054 return super.attackEntityFrom(par1DamageSource, par2); 055 } 056 } 057 058 protected void entityInit() 059 { 060 super.entityInit(); 061 this.dataWatcher.addObject(16, Byte.valueOf((byte)0)); 062 } 063 064 public int getMaxHealth() 065 { 066 return 10; 067 } 068 069 /** 070 * Called to update the entity's position/logic. 071 */ 072 public void onUpdate() 073 { 074 super.onUpdate(); 075 byte var1 = this.dataWatcher.getWatchableObjectByte(16); 076 this.texture = var1 == 1 ? "/mob/ghast_fire.png" : "/mob/ghast.png"; 077 } 078 079 protected void updateEntityActionState() 080 { 081 if (!this.worldObj.isRemote && this.worldObj.difficultySetting == 0) 082 { 083 this.setDead(); 084 } 085 086 this.despawnEntity(); 087 this.prevAttackCounter = this.attackCounter; 088 double var1 = this.waypointX - this.posX; 089 double var3 = this.waypointY - this.posY; 090 double var5 = this.waypointZ - this.posZ; 091 double var7 = var1 * var1 + var3 * var3 + var5 * var5; 092 093 if (var7 < 1.0D || var7 > 3600.0D) 094 { 095 this.waypointX = this.posX + (double)((this.rand.nextFloat() * 2.0F - 1.0F) * 16.0F); 096 this.waypointY = this.posY + (double)((this.rand.nextFloat() * 2.0F - 1.0F) * 16.0F); 097 this.waypointZ = this.posZ + (double)((this.rand.nextFloat() * 2.0F - 1.0F) * 16.0F); 098 } 099 100 if (this.courseChangeCooldown-- <= 0) 101 { 102 this.courseChangeCooldown += this.rand.nextInt(5) + 2; 103 var7 = (double)MathHelper.sqrt_double(var7); 104 105 if (this.isCourseTraversable(this.waypointX, this.waypointY, this.waypointZ, var7)) 106 { 107 this.motionX += var1 / var7 * 0.1D; 108 this.motionY += var3 / var7 * 0.1D; 109 this.motionZ += var5 / var7 * 0.1D; 110 } 111 else 112 { 113 this.waypointX = this.posX; 114 this.waypointY = this.posY; 115 this.waypointZ = this.posZ; 116 } 117 } 118 119 if (this.targetedEntity != null && this.targetedEntity.isDead) 120 { 121 this.targetedEntity = null; 122 } 123 124 if (this.targetedEntity == null || this.aggroCooldown-- <= 0) 125 { 126 this.targetedEntity = this.worldObj.getClosestVulnerablePlayerToEntity(this, 100.0D); 127 128 if (this.targetedEntity != null) 129 { 130 this.aggroCooldown = 20; 131 } 132 } 133 134 double var9 = 64.0D; 135 136 if (this.targetedEntity != null && this.targetedEntity.getDistanceSqToEntity(this) < var9 * var9) 137 { 138 double var11 = this.targetedEntity.posX - this.posX; 139 double var13 = this.targetedEntity.boundingBox.minY + (double)(this.targetedEntity.height / 2.0F) - (this.posY + (double)(this.height / 2.0F)); 140 double var15 = this.targetedEntity.posZ - this.posZ; 141 this.renderYawOffset = this.rotationYaw = -((float)Math.atan2(var11, var15)) * 180.0F / (float)Math.PI; 142 143 if (this.canEntityBeSeen(this.targetedEntity)) 144 { 145 if (this.attackCounter == 10) 146 { 147 this.worldObj.playAuxSFXAtEntity((EntityPlayer)null, 1007, (int)this.posX, (int)this.posY, (int)this.posZ, 0); 148 } 149 150 ++this.attackCounter; 151 152 if (this.attackCounter == 20) 153 { 154 this.worldObj.playAuxSFXAtEntity((EntityPlayer)null, 1008, (int)this.posX, (int)this.posY, (int)this.posZ, 0); 155 EntityLargeFireball var17 = new EntityLargeFireball(this.worldObj, this, var11, var13, var15); 156 double var18 = 4.0D; 157 Vec3 var20 = this.getLook(1.0F); 158 var17.posX = this.posX + var20.xCoord * var18; 159 var17.posY = this.posY + (double)(this.height / 2.0F) + 0.5D; 160 var17.posZ = this.posZ + var20.zCoord * var18; 161 this.worldObj.spawnEntityInWorld(var17); 162 this.attackCounter = -40; 163 } 164 } 165 else if (this.attackCounter > 0) 166 { 167 --this.attackCounter; 168 } 169 } 170 else 171 { 172 this.renderYawOffset = this.rotationYaw = -((float)Math.atan2(this.motionX, this.motionZ)) * 180.0F / (float)Math.PI; 173 174 if (this.attackCounter > 0) 175 { 176 --this.attackCounter; 177 } 178 } 179 180 if (!this.worldObj.isRemote) 181 { 182 byte var21 = this.dataWatcher.getWatchableObjectByte(16); 183 byte var12 = (byte)(this.attackCounter > 10 ? 1 : 0); 184 185 if (var21 != var12) 186 { 187 this.dataWatcher.updateObject(16, Byte.valueOf(var12)); 188 } 189 } 190 } 191 192 /** 193 * True if the ghast has an unobstructed line of travel to the waypoint. 194 */ 195 private boolean isCourseTraversable(double par1, double par3, double par5, double par7) 196 { 197 double var9 = (this.waypointX - this.posX) / par7; 198 double var11 = (this.waypointY - this.posY) / par7; 199 double var13 = (this.waypointZ - this.posZ) / par7; 200 AxisAlignedBB var15 = this.boundingBox.copy(); 201 202 for (int var16 = 1; (double)var16 < par7; ++var16) 203 { 204 var15.offset(var9, var11, var13); 205 206 if (!this.worldObj.getCollidingBoundingBoxes(this, var15).isEmpty()) 207 { 208 return false; 209 } 210 } 211 212 return true; 213 } 214 215 /** 216 * Returns the sound this mob makes while it's alive. 217 */ 218 protected String getLivingSound() 219 { 220 return "mob.ghast.moan"; 221 } 222 223 /** 224 * Returns the sound this mob makes when it is hurt. 225 */ 226 protected String getHurtSound() 227 { 228 return "mob.ghast.scream"; 229 } 230 231 /** 232 * Returns the sound this mob makes on death. 233 */ 234 protected String getDeathSound() 235 { 236 return "mob.ghast.death"; 237 } 238 239 /** 240 * Returns the item ID for the item the mob drops on death. 241 */ 242 protected int getDropItemId() 243 { 244 return Item.gunpowder.shiftedIndex; 245 } 246 247 /** 248 * Drop 0-2 items of this living's type 249 */ 250 protected void dropFewItems(boolean par1, int par2) 251 { 252 int var3 = this.rand.nextInt(2) + this.rand.nextInt(1 + par2); 253 int var4; 254 255 for (var4 = 0; var4 < var3; ++var4) 256 { 257 this.dropItem(Item.ghastTear.shiftedIndex, 1); 258 } 259 260 var3 = this.rand.nextInt(3) + this.rand.nextInt(1 + par2); 261 262 for (var4 = 0; var4 < var3; ++var4) 263 { 264 this.dropItem(Item.gunpowder.shiftedIndex, 1); 265 } 266 } 267 268 /** 269 * Returns the volume for the sounds this mob makes. 270 */ 271 protected float getSoundVolume() 272 { 273 return 10.0F; 274 } 275 276 /** 277 * Checks if the entity's current position is a valid location to spawn this entity. 278 */ 279 public boolean getCanSpawnHere() 280 { 281 return this.rand.nextInt(20) == 0 && super.getCanSpawnHere() && this.worldObj.difficultySetting > 0; 282 } 283 284 /** 285 * Will return how many at most can spawn in a chunk at once. 286 */ 287 public int getMaxSpawnedInChunk() 288 { 289 return 1; 290 } 291 }