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