001 package net.minecraft.entity.item;
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 import net.minecraft.block.Block;
012 import net.minecraft.block.material.Material;
013 import net.minecraft.entity.Entity;
014 import net.minecraft.entity.player.EntityPlayer;
015 import net.minecraft.item.Item;
016 import net.minecraft.item.ItemStack;
017 import net.minecraft.nbt.NBTTagCompound;
018 import net.minecraft.stats.AchievementList;
019 import net.minecraft.util.DamageSource;
020 import net.minecraft.util.MathHelper;
021 import net.minecraft.util.StatCollector;
022 import net.minecraft.world.World;
023
024 public class EntityItem extends Entity
025 {
026 /** The item stack of this EntityItem. */
027 public ItemStack item;
028
029 /**
030 * The age of this EntityItem (used to animate it up and down as well as expire it)
031 */
032 public int age = 0;
033 public int delayBeforeCanPickup;
034
035 /** The health of this EntityItem. (For example, damage for tools) */
036 private int health = 5;
037
038 /** The EntityItem's random initial float height. */
039 public float hoverStart = (float)(Math.random() * Math.PI * 2.0D);
040
041 /**
042 * The maximum age of this EntityItem. The item is expired once this is reached.
043 */
044 public int lifespan = 6000;
045
046 public EntityItem(World par1World, double par2, double par4, double par6, ItemStack par8ItemStack)
047 {
048 super(par1World);
049 this.setSize(0.25F, 0.25F);
050 this.yOffset = this.height / 2.0F;
051 this.setPosition(par2, par4, par6);
052 this.item = par8ItemStack;
053 this.rotationYaw = (float)(Math.random() * 360.0D);
054 this.motionX = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D));
055 this.motionY = 0.20000000298023224D;
056 this.motionZ = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D));
057 this.lifespan = (par8ItemStack.getItem() == null ? 6000 : par8ItemStack.getItem().getEntityLifespan(par8ItemStack, par1World));
058 }
059
060 /**
061 * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
062 * prevent them from trampling crops
063 */
064 protected boolean canTriggerWalking()
065 {
066 return false;
067 }
068
069 public EntityItem(World par1World)
070 {
071 super(par1World);
072 this.setSize(0.25F, 0.25F);
073 this.yOffset = this.height / 2.0F;
074 }
075
076 protected void entityInit() {}
077
078 /**
079 * Called to update the entity's position/logic.
080 */
081 public void onUpdate()
082 {
083 super.onUpdate();
084
085 if (this.delayBeforeCanPickup > 0)
086 {
087 --this.delayBeforeCanPickup;
088 }
089
090 this.prevPosX = this.posX;
091 this.prevPosY = this.posY;
092 this.prevPosZ = this.posZ;
093 this.motionY -= 0.03999999910593033D;
094 this.noClip = this.pushOutOfBlocks(this.posX, (this.boundingBox.minY + this.boundingBox.maxY) / 2.0D, this.posZ);
095 this.moveEntity(this.motionX, this.motionY, this.motionZ);
096 boolean var1 = (int)this.prevPosX != (int)this.posX || (int)this.prevPosY != (int)this.posY || (int)this.prevPosZ != (int)this.posZ;
097
098 if (var1)
099 {
100 if (this.worldObj.getBlockMaterial(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.posY), MathHelper.floor_double(this.posZ)) == Material.lava)
101 {
102 this.motionY = 0.20000000298023224D;
103 this.motionX = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
104 this.motionZ = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
105 this.func_85030_a("random.fizz", 0.4F, 2.0F + this.rand.nextFloat() * 0.4F);
106 }
107
108 if (!this.worldObj.isRemote)
109 {
110 this.func_85054_d();
111 }
112 }
113
114 float var2 = 0.98F;
115
116 if (this.onGround)
117 {
118 var2 = 0.58800006F;
119 int var3 = this.worldObj.getBlockId(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.boundingBox.minY) - 1, MathHelper.floor_double(this.posZ));
120
121 if (var3 > 0)
122 {
123 var2 = Block.blocksList[var3].slipperiness * 0.98F;
124 }
125 }
126
127 this.motionX *= (double)var2;
128 this.motionY *= 0.9800000190734863D;
129 this.motionZ *= (double)var2;
130
131 if (this.onGround)
132 {
133 this.motionY *= -0.5D;
134 }
135
136 ++this.age;
137
138 if (!this.worldObj.isRemote && this.age >= lifespan)
139 {
140 ItemExpireEvent event = new ItemExpireEvent(this, (item.getItem() == null ? 6000 : item.getItem().getEntityLifespan(item, worldObj)));
141 if (MinecraftForge.EVENT_BUS.post(event))
142 {
143 lifespan += event.extraLife;
144 }
145 else
146 {
147 this.setDead();
148 }
149 }
150
151 if (this.item == null || this.item.stackSize <= 0)
152 {
153 this.setDead();
154 }
155 }
156
157 private void func_85054_d()
158 {
159 Iterator var1 = this.worldObj.getEntitiesWithinAABB(EntityItem.class, this.boundingBox.expand(0.5D, 0.0D, 0.5D)).iterator();
160
161 while (var1.hasNext())
162 {
163 EntityItem var2 = (EntityItem)var1.next();
164 this.func_70289_a(var2);
165 }
166 }
167
168 public boolean func_70289_a(EntityItem par1EntityItem)
169 {
170 if (par1EntityItem == this)
171 {
172 return false;
173 }
174 else if (par1EntityItem.isEntityAlive() && this.isEntityAlive())
175 {
176 if (par1EntityItem.item.getItem() != this.item.getItem())
177 {
178 return false;
179 }
180 else if (par1EntityItem.item.hasTagCompound() ^ this.item.hasTagCompound())
181 {
182 return false;
183 }
184 else if (par1EntityItem.item.hasTagCompound() && !par1EntityItem.item.getTagCompound().equals(this.item.getTagCompound()))
185 {
186 return false;
187 }
188 else if (par1EntityItem.item.getItem().getHasSubtypes() && par1EntityItem.item.getItemDamage() != this.item.getItemDamage())
189 {
190 return false;
191 }
192 else if (par1EntityItem.item.stackSize < this.item.stackSize)
193 {
194 return par1EntityItem.func_70289_a(this);
195 }
196 else if (par1EntityItem.item.stackSize + this.item.stackSize > par1EntityItem.item.getMaxStackSize())
197 {
198 return false;
199 }
200 else
201 {
202 par1EntityItem.item.stackSize += this.item.stackSize;
203 par1EntityItem.delayBeforeCanPickup = Math.max(par1EntityItem.delayBeforeCanPickup, this.delayBeforeCanPickup);
204 par1EntityItem.age = Math.min(par1EntityItem.age, this.age);
205 this.setDead();
206 return true;
207 }
208 }
209 else
210 {
211 return false;
212 }
213 }
214
215 public void func_70288_d()
216 {
217 this.age = 4800;
218 }
219
220 /**
221 * Returns if this entity is in water and will end up adding the waters velocity to the entity
222 */
223 public boolean handleWaterMovement()
224 {
225 return this.worldObj.handleMaterialAcceleration(this.boundingBox, Material.water, this);
226 }
227
228 /**
229 * Will deal the specified amount of damage to the entity if the entity isn't immune to fire damage. Args:
230 * amountDamage
231 */
232 protected void dealFireDamage(int par1)
233 {
234 this.attackEntityFrom(DamageSource.inFire, par1);
235 }
236
237 /**
238 * Called when the entity is attacked.
239 */
240 public boolean attackEntityFrom(DamageSource par1DamageSource, int par2)
241 {
242 if (this.func_85032_ar())
243 {
244 return false;
245 }
246 else
247 {
248 this.setBeenAttacked();
249 this.health -= par2;
250
251 if (this.health <= 0)
252 {
253 this.setDead();
254 }
255
256 return false;
257 }
258 }
259
260 /**
261 * (abstract) Protected helper method to write subclass entity data to NBT.
262 */
263 public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
264 {
265 par1NBTTagCompound.setShort("Health", (short)((byte)this.health));
266 par1NBTTagCompound.setShort("Age", (short)this.age);
267 par1NBTTagCompound.setInteger("Lifespan", lifespan);
268
269 if (this.item != null)
270 {
271 par1NBTTagCompound.setCompoundTag("Item", this.item.writeToNBT(new NBTTagCompound()));
272 }
273 }
274
275 /**
276 * (abstract) Protected helper method to read subclass entity data from NBT.
277 */
278 public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
279 {
280 this.health = par1NBTTagCompound.getShort("Health") & 255;
281 this.age = par1NBTTagCompound.getShort("Age");
282 NBTTagCompound var2 = par1NBTTagCompound.getCompoundTag("Item");
283 this.item = ItemStack.loadItemStackFromNBT(var2);
284
285 if (this.item == null || this.item.stackSize <= 0)
286 {
287 this.setDead();
288 }
289
290 if (par1NBTTagCompound.hasKey("Lifespan"))
291 {
292 lifespan = par1NBTTagCompound.getInteger("Lifespan");
293 }
294 }
295
296 /**
297 * Called by a player entity when they collide with an entity
298 */
299 public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
300 {
301 if (!this.worldObj.isRemote)
302 {
303 if (this.delayBeforeCanPickup > 0)
304 {
305 return;
306 }
307
308 EntityItemPickupEvent event = new EntityItemPickupEvent(par1EntityPlayer, this);
309
310 if (MinecraftForge.EVENT_BUS.post(event))
311 {
312 return;
313 }
314
315 int var2 = this.item.stackSize;
316
317 if (this.delayBeforeCanPickup <= 0 && (event.getResult() == Result.ALLOW || var2 <= 0 || par1EntityPlayer.inventory.addItemStackToInventory(this.item)))
318 {
319 if (this.item.itemID == Block.wood.blockID)
320 {
321 par1EntityPlayer.triggerAchievement(AchievementList.mineWood);
322 }
323
324 if (this.item.itemID == Item.leather.shiftedIndex)
325 {
326 par1EntityPlayer.triggerAchievement(AchievementList.killCow);
327 }
328
329 if (this.item.itemID == Item.diamond.shiftedIndex)
330 {
331 par1EntityPlayer.triggerAchievement(AchievementList.diamonds);
332 }
333
334 if (this.item.itemID == Item.blazeRod.shiftedIndex)
335 {
336 par1EntityPlayer.triggerAchievement(AchievementList.blazeRod);
337 }
338
339 GameRegistry.onPickupNotification(par1EntityPlayer, this);
340
341 this.func_85030_a("random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
342 par1EntityPlayer.onItemPickup(this, var2);
343
344 if (this.item.stackSize <= 0)
345 {
346 this.setDead();
347 }
348 }
349 }
350 }
351
352 /**
353 * Gets the username of the entity.
354 */
355 public String getEntityName()
356 {
357 return StatCollector.translateToLocal("item." + this.item.getItemName());
358 }
359
360 /**
361 * If returns false, the item will not inflict any damage against entities.
362 */
363 public boolean canAttackWithItem()
364 {
365 return false;
366 }
367
368 /**
369 * Teleports the entity to another dimension. Params: Dimension number to teleport to
370 */
371 public void travelToDimension(int par1)
372 {
373 super.travelToDimension(par1);
374
375 if (!this.worldObj.isRemote)
376 {
377 this.func_85054_d();
378 }
379 }
380 }