001 package net.minecraft.src;
002
003 import java.util.Iterator;
004
005 import net.minecraftforge.common.MinecraftForge;
006 import net.minecraftforge.event.Event.Result;
007 import net.minecraftforge.event.entity.item.ItemExpireEvent;
008 import net.minecraftforge.event.entity.player.EntityItemPickupEvent;
009
010 import cpw.mods.fml.common.registry.GameRegistry;
011
012 public class EntityItem extends Entity
013 {
014 /** The item stack of this EntityItem. */
015 public ItemStack item;
016
017 /**
018 * The age of this EntityItem (used to animate it up and down as well as expire it)
019 */
020 public int age = 0;
021 public int delayBeforeCanPickup;
022
023 /** The health of this EntityItem. (For example, damage for tools) */
024 private int health = 5;
025
026 /** The EntityItem's random initial float height. */
027 public float hoverStart = (float)(Math.random() * Math.PI * 2.0D);
028
029 /**
030 * The maximum age of this EntityItem. The item is expired once this is reached.
031 */
032 public int lifespan = 6000;
033
034 public EntityItem(World par1World, double par2, double par4, double par6, ItemStack par8ItemStack)
035 {
036 super(par1World);
037 this.setSize(0.25F, 0.25F);
038 this.yOffset = this.height / 2.0F;
039 this.setPosition(par2, par4, par6);
040 this.item = par8ItemStack;
041 this.rotationYaw = (float)(Math.random() * 360.0D);
042 this.motionX = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D));
043 this.motionY = 0.20000000298023224D;
044 this.motionZ = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D));
045 this.lifespan = (par8ItemStack.getItem() == null ? 6000 : par8ItemStack.getItem().getEntityLifespan(par8ItemStack, par1World));
046 }
047
048 /**
049 * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
050 * prevent them from trampling crops
051 */
052 protected boolean canTriggerWalking()
053 {
054 return false;
055 }
056
057 public EntityItem(World par1World)
058 {
059 super(par1World);
060 this.setSize(0.25F, 0.25F);
061 this.yOffset = this.height / 2.0F;
062 }
063
064 protected void entityInit() {}
065
066 /**
067 * Called to update the entity's position/logic.
068 */
069 public void onUpdate()
070 {
071 super.onUpdate();
072
073 if (this.delayBeforeCanPickup > 0)
074 {
075 --this.delayBeforeCanPickup;
076 }
077
078 this.prevPosX = this.posX;
079 this.prevPosY = this.posY;
080 this.prevPosZ = this.posZ;
081 this.motionY -= 0.03999999910593033D;
082 this.noClip = this.pushOutOfBlocks(this.posX, (this.boundingBox.minY + this.boundingBox.maxY) / 2.0D, this.posZ);
083 this.moveEntity(this.motionX, this.motionY, this.motionZ);
084 boolean var1 = (int)this.prevPosX != (int)this.posX || (int)this.prevPosY != (int)this.posY || (int)this.prevPosZ != (int)this.posZ;
085
086 if (var1)
087 {
088 if (this.worldObj.getBlockMaterial(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.posY), MathHelper.floor_double(this.posZ)) == Material.lava)
089 {
090 this.motionY = 0.20000000298023224D;
091 this.motionX = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
092 this.motionZ = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
093 this.func_85030_a("random.fizz", 0.4F, 2.0F + this.rand.nextFloat() * 0.4F);
094 }
095
096 if (!this.worldObj.isRemote)
097 {
098 this.func_85054_d();
099 }
100 }
101
102 float var2 = 0.98F;
103
104 if (this.onGround)
105 {
106 var2 = 0.58800006F;
107 int var3 = this.worldObj.getBlockId(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.boundingBox.minY) - 1, MathHelper.floor_double(this.posZ));
108
109 if (var3 > 0)
110 {
111 var2 = Block.blocksList[var3].slipperiness * 0.98F;
112 }
113 }
114
115 this.motionX *= (double)var2;
116 this.motionY *= 0.9800000190734863D;
117 this.motionZ *= (double)var2;
118
119 if (this.onGround)
120 {
121 this.motionY *= -0.5D;
122 }
123
124 ++this.age;
125
126 if (!this.worldObj.isRemote && this.age >= lifespan)
127 {
128 ItemExpireEvent event = new ItemExpireEvent(this, (item.getItem() == null ? 6000 : item.getItem().getEntityLifespan(item, worldObj)));
129 if (MinecraftForge.EVENT_BUS.post(event))
130 {
131 lifespan += event.extraLife;
132 }
133 else
134 {
135 this.setDead();
136 }
137 }
138
139 if (this.item == null || this.item.stackSize <= 0)
140 {
141 this.setDead();
142 }
143 }
144
145 private void func_85054_d()
146 {
147 Iterator var1 = this.worldObj.getEntitiesWithinAABB(EntityItem.class, this.boundingBox.expand(0.5D, 0.0D, 0.5D)).iterator();
148
149 while (var1.hasNext())
150 {
151 EntityItem var2 = (EntityItem)var1.next();
152 this.func_70289_a(var2);
153 }
154 }
155
156 public boolean func_70289_a(EntityItem par1EntityItem)
157 {
158 if (par1EntityItem == this)
159 {
160 return false;
161 }
162 else if (par1EntityItem.isEntityAlive() && this.isEntityAlive())
163 {
164 if (par1EntityItem.item.getItem() != this.item.getItem())
165 {
166 return false;
167 }
168 else if (par1EntityItem.item.hasTagCompound() ^ this.item.hasTagCompound())
169 {
170 return false;
171 }
172 else if (par1EntityItem.item.hasTagCompound() && !par1EntityItem.item.getTagCompound().equals(this.item.getTagCompound()))
173 {
174 return false;
175 }
176 else if (par1EntityItem.item.getItem().getHasSubtypes() && par1EntityItem.item.getItemDamage() != this.item.getItemDamage())
177 {
178 return false;
179 }
180 else if (par1EntityItem.item.stackSize < this.item.stackSize)
181 {
182 return par1EntityItem.func_70289_a(this);
183 }
184 else if (par1EntityItem.item.stackSize + this.item.stackSize > par1EntityItem.item.getMaxStackSize())
185 {
186 return false;
187 }
188 else
189 {
190 par1EntityItem.item.stackSize += this.item.stackSize;
191 par1EntityItem.delayBeforeCanPickup = Math.max(par1EntityItem.delayBeforeCanPickup, this.delayBeforeCanPickup);
192 par1EntityItem.age = Math.min(par1EntityItem.age, this.age);
193 this.setDead();
194 return true;
195 }
196 }
197 else
198 {
199 return false;
200 }
201 }
202
203 public void func_70288_d()
204 {
205 this.age = 4800;
206 }
207
208 /**
209 * Returns if this entity is in water and will end up adding the waters velocity to the entity
210 */
211 public boolean handleWaterMovement()
212 {
213 return this.worldObj.handleMaterialAcceleration(this.boundingBox, Material.water, this);
214 }
215
216 /**
217 * Will deal the specified amount of damage to the entity if the entity isn't immune to fire damage. Args:
218 * amountDamage
219 */
220 protected void dealFireDamage(int par1)
221 {
222 this.attackEntityFrom(DamageSource.inFire, par1);
223 }
224
225 /**
226 * Called when the entity is attacked.
227 */
228 public boolean attackEntityFrom(DamageSource par1DamageSource, int par2)
229 {
230 if (this.func_85032_ar())
231 {
232 return false;
233 }
234 else
235 {
236 this.setBeenAttacked();
237 this.health -= par2;
238
239 if (this.health <= 0)
240 {
241 this.setDead();
242 }
243
244 return false;
245 }
246 }
247
248 /**
249 * (abstract) Protected helper method to write subclass entity data to NBT.
250 */
251 public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
252 {
253 par1NBTTagCompound.setShort("Health", (short)((byte)this.health));
254 par1NBTTagCompound.setShort("Age", (short)this.age);
255 par1NBTTagCompound.setInteger("Lifespan", lifespan);
256
257 if (this.item != null)
258 {
259 par1NBTTagCompound.setCompoundTag("Item", this.item.writeToNBT(new NBTTagCompound()));
260 }
261 }
262
263 /**
264 * (abstract) Protected helper method to read subclass entity data from NBT.
265 */
266 public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
267 {
268 this.health = par1NBTTagCompound.getShort("Health") & 255;
269 this.age = par1NBTTagCompound.getShort("Age");
270 NBTTagCompound var2 = par1NBTTagCompound.getCompoundTag("Item");
271 this.item = ItemStack.loadItemStackFromNBT(var2);
272
273 if (this.item == null || this.item.stackSize <= 0)
274 {
275 this.setDead();
276 }
277
278 if (par1NBTTagCompound.hasKey("Lifespan"))
279 {
280 lifespan = par1NBTTagCompound.getInteger("Lifespan");
281 }
282 }
283
284 /**
285 * Called by a player entity when they collide with an entity
286 */
287 public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
288 {
289 if (!this.worldObj.isRemote)
290 {
291 if (this.delayBeforeCanPickup > 0)
292 {
293 return;
294 }
295
296 EntityItemPickupEvent event = new EntityItemPickupEvent(par1EntityPlayer, this);
297
298 if (MinecraftForge.EVENT_BUS.post(event))
299 {
300 return;
301 }
302
303 int var2 = this.item.stackSize;
304
305 if (this.delayBeforeCanPickup <= 0 && (event.getResult() == Result.ALLOW || var2 <= 0 || par1EntityPlayer.inventory.addItemStackToInventory(this.item)))
306 {
307 if (this.item.itemID == Block.wood.blockID)
308 {
309 par1EntityPlayer.triggerAchievement(AchievementList.mineWood);
310 }
311
312 if (this.item.itemID == Item.leather.shiftedIndex)
313 {
314 par1EntityPlayer.triggerAchievement(AchievementList.killCow);
315 }
316
317 if (this.item.itemID == Item.diamond.shiftedIndex)
318 {
319 par1EntityPlayer.triggerAchievement(AchievementList.diamonds);
320 }
321
322 if (this.item.itemID == Item.blazeRod.shiftedIndex)
323 {
324 par1EntityPlayer.triggerAchievement(AchievementList.blazeRod);
325 }
326
327 GameRegistry.onPickupNotification(par1EntityPlayer, this);
328
329 this.func_85030_a("random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
330 par1EntityPlayer.onItemPickup(this, var2);
331
332 if (this.item.stackSize <= 0)
333 {
334 this.setDead();
335 }
336 }
337 }
338 }
339
340 /**
341 * Gets the username of the entity.
342 */
343 public String getEntityName()
344 {
345 return StatCollector.translateToLocal("item." + this.item.getItemName());
346 }
347
348 /**
349 * If returns false, the item will not inflict any damage against entities.
350 */
351 public boolean canAttackWithItem()
352 {
353 return false;
354 }
355
356 /**
357 * Teleports the entity to another dimension. Params: Dimension number to teleport to
358 */
359 public void travelToDimension(int par1)
360 {
361 super.travelToDimension(par1);
362
363 if (!this.worldObj.isRemote)
364 {
365 this.func_85054_d();
366 }
367 }
368 }