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 EntityFireball var17 = new EntityFireball(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 }