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 }