001 package net.minecraft.src;
002
003 import java.util.Iterator;
004
005 import net.minecraftforge.common.MinecraftForge;
006 import net.minecraftforge.event.entity.item.ItemExpireEvent;
007 import net.minecraftforge.event.entity.player.EntityItemPickupEvent;
008
009 import cpw.mods.fml.common.registry.GameRegistry;
010
011 public class EntityItem extends Entity
012 {
013 /** The item stack of this EntityItem. */
014 public ItemStack item;
015
016 /**
017 * The age of this EntityItem (used to animate it up and down as well as expire it)
018 */
019 public int age = 0;
020 public int delayBeforeCanPickup;
021
022 /** The health of this EntityItem. (For example, damage for tools) */
023 private int health = 5;
024
025 /** The EntityItem's random initial float height. */
026 public float hoverStart = (float)(Math.random() * Math.PI * 2.0D);
027
028 /**
029 * The maximum age of this EntityItem. The item is expired once this is reached.
030 */
031 public int lifespan = 6000;
032
033 public EntityItem(World par1World, double par2, double par4, double par6, ItemStack par8ItemStack)
034 {
035 super(par1World);
036 this.setSize(0.25F, 0.25F);
037 this.yOffset = this.height / 2.0F;
038 this.setPosition(par2, par4, par6);
039 this.item = par8ItemStack;
040 this.rotationYaw = (float)(Math.random() * 360.0D);
041 this.motionX = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D));
042 this.motionY = 0.20000000298023224D;
043 this.motionZ = (double)((float)(Math.random() * 0.20000000298023224D - 0.10000000149011612D));
044 this.lifespan = (par8ItemStack.getItem() == null ? 6000 : par8ItemStack.getItem().getEntityLifespan(par8ItemStack, par1World));
045 }
046
047 /**
048 * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
049 * prevent them from trampling crops
050 */
051 protected boolean canTriggerWalking()
052 {
053 return false;
054 }
055
056 public EntityItem(World par1World)
057 {
058 super(par1World);
059 this.setSize(0.25F, 0.25F);
060 this.yOffset = this.height / 2.0F;
061 }
062
063 protected void entityInit() {}
064
065 /**
066 * Called to update the entity's position/logic.
067 */
068 public void onUpdate()
069 {
070 super.onUpdate();
071
072 if (this.delayBeforeCanPickup > 0)
073 {
074 --this.delayBeforeCanPickup;
075 }
076
077 this.prevPosX = this.posX;
078 this.prevPosY = this.posY;
079 this.prevPosZ = this.posZ;
080 this.motionY -= 0.03999999910593033D;
081 this.pushOutOfBlocks(this.posX, (this.boundingBox.minY + this.boundingBox.maxY) / 2.0D, this.posZ);
082 this.moveEntity(this.motionX, this.motionY, this.motionZ);
083 boolean var1 = (int)this.prevPosX != (int)this.posX || (int)this.prevPosY != (int)this.posY || (int)this.prevPosZ != (int)this.posZ;
084
085 if (var1)
086 {
087 if (this.worldObj.getBlockMaterial(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.posY), MathHelper.floor_double(this.posZ)) == Material.lava)
088 {
089 this.motionY = 0.20000000298023224D;
090 this.motionX = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
091 this.motionZ = (double)((this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F);
092 this.worldObj.playSoundAtEntity(this, "random.fizz", 0.4F, 2.0F + this.rand.nextFloat() * 0.4F);
093 }
094
095 if (!this.worldObj.isRemote)
096 {
097 Iterator var2 = this.worldObj.getEntitiesWithinAABB(EntityItem.class, this.boundingBox.expand(0.5D, 0.0D, 0.5D)).iterator();
098
099 while (var2.hasNext())
100 {
101 EntityItem var3 = (EntityItem)var2.next();
102 this.func_70289_a(var3);
103 }
104 }
105 }
106
107 float var4 = 0.98F;
108
109 if (this.onGround)
110 {
111 var4 = 0.58800006F;
112 int var5 = this.worldObj.getBlockId(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.boundingBox.minY) - 1, MathHelper.floor_double(this.posZ));
113
114 if (var5 > 0)
115 {
116 var4 = Block.blocksList[var5].slipperiness * 0.98F;
117 }
118 }
119
120 this.motionX *= (double)var4;
121 this.motionY *= 0.9800000190734863D;
122 this.motionZ *= (double)var4;
123
124 if (this.onGround)
125 {
126 this.motionY *= -0.5D;
127 }
128
129 ++this.age;
130
131 if (this.age >= lifespan)
132 {
133 ItemExpireEvent event = new ItemExpireEvent(this, (item.getItem() == null ? 6000 : item.getItem().getEntityLifespan(item, worldObj)));
134 if (MinecraftForge.EVENT_BUS.post(event))
135 {
136 lifespan += event.extraLife;
137 }
138 else
139 {
140 this.setDead();
141 }
142 }
143
144 if (this.item == null || this.item.stackSize <= 0)
145 {
146 this.setDead();
147 }
148 }
149
150 public boolean func_70289_a(EntityItem par1EntityItem)
151 {
152 if (par1EntityItem == this)
153 {
154 return false;
155 }
156 else if (par1EntityItem.isEntityAlive() && this.isEntityAlive())
157 {
158 if (par1EntityItem.item.getItem() != this.item.getItem())
159 {
160 return false;
161 }
162 else if (par1EntityItem.item.getItem().getHasSubtypes() && par1EntityItem.item.getItemDamage() != this.item.getItemDamage())
163 {
164 return false;
165 }
166 else if (par1EntityItem.item.stackSize < this.item.stackSize)
167 {
168 return par1EntityItem.func_70289_a(this);
169 }
170 else if (par1EntityItem.item.stackSize + this.item.stackSize > par1EntityItem.item.getMaxStackSize())
171 {
172 return false;
173 }
174 else
175 {
176 par1EntityItem.item.stackSize += this.item.stackSize;
177 par1EntityItem.delayBeforeCanPickup = Math.max(par1EntityItem.delayBeforeCanPickup, this.delayBeforeCanPickup);
178 par1EntityItem.age = Math.min(par1EntityItem.age, this.age);
179 this.setDead();
180 return true;
181 }
182 }
183 else
184 {
185 return false;
186 }
187 }
188
189 public void func_70288_d()
190 {
191 this.age = 4800;
192 }
193
194 /**
195 * Returns if this entity is in water and will end up adding the waters velocity to the entity
196 */
197 public boolean handleWaterMovement()
198 {
199 return this.worldObj.handleMaterialAcceleration(this.boundingBox, Material.water, this);
200 }
201
202 /**
203 * Will deal the specified amount of damage to the entity if the entity isn't immune to fire damage. Args:
204 * amountDamage
205 */
206 protected void dealFireDamage(int par1)
207 {
208 this.attackEntityFrom(DamageSource.inFire, par1);
209 }
210
211 /**
212 * Called when the entity is attacked.
213 */
214 public boolean attackEntityFrom(DamageSource par1DamageSource, int par2)
215 {
216 this.setBeenAttacked();
217 this.health -= par2;
218
219 if (this.health <= 0)
220 {
221 this.setDead();
222 }
223
224 return false;
225 }
226
227 /**
228 * (abstract) Protected helper method to write subclass entity data to NBT.
229 */
230 public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound)
231 {
232 par1NBTTagCompound.setShort("Health", (short)((byte)this.health));
233 par1NBTTagCompound.setShort("Age", (short)this.age);
234 par1NBTTagCompound.setInteger("Lifespan", lifespan);
235
236 if (this.item != null)
237 {
238 par1NBTTagCompound.setCompoundTag("Item", this.item.writeToNBT(new NBTTagCompound()));
239 }
240 }
241
242 /**
243 * (abstract) Protected helper method to read subclass entity data from NBT.
244 */
245 public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound)
246 {
247 this.health = par1NBTTagCompound.getShort("Health") & 255;
248 this.age = par1NBTTagCompound.getShort("Age");
249 NBTTagCompound var2 = par1NBTTagCompound.getCompoundTag("Item");
250 this.item = ItemStack.loadItemStackFromNBT(var2);
251
252 if (this.item == null || this.item.stackSize <= 0)
253 {
254 this.setDead();
255 }
256
257 if (par1NBTTagCompound.hasKey("Lifespan"))
258 {
259 lifespan = par1NBTTagCompound.getInteger("Lifespan");
260 }
261 }
262
263 /**
264 * Called by a player entity when they collide with an entity
265 */
266 public void onCollideWithPlayer(EntityPlayer par1EntityPlayer)
267 {
268 if (!this.worldObj.isRemote)
269 {
270 if (this.delayBeforeCanPickup > 0)
271 {
272 return;
273 }
274
275 EntityItemPickupEvent event = new EntityItemPickupEvent(par1EntityPlayer, this);
276
277 if (MinecraftForge.EVENT_BUS.post(event))
278 {
279 return;
280 }
281
282 int var2 = this.item.stackSize;
283
284 if (this.delayBeforeCanPickup <= 0 && (event.isHandled() || var2 <= 0 || par1EntityPlayer.inventory.addItemStackToInventory(this.item)))
285 {
286 if (this.item.itemID == Block.wood.blockID)
287 {
288 par1EntityPlayer.triggerAchievement(AchievementList.mineWood);
289 }
290
291 if (this.item.itemID == Item.leather.shiftedIndex)
292 {
293 par1EntityPlayer.triggerAchievement(AchievementList.killCow);
294 }
295
296 if (this.item.itemID == Item.diamond.shiftedIndex)
297 {
298 par1EntityPlayer.triggerAchievement(AchievementList.diamonds);
299 }
300
301 if (this.item.itemID == Item.blazeRod.shiftedIndex)
302 {
303 par1EntityPlayer.triggerAchievement(AchievementList.blazeRod);
304 }
305
306 GameRegistry.onPickupNotification(par1EntityPlayer, this);
307
308 this.worldObj.playSoundAtEntity(this, "random.pop", 0.2F, ((this.rand.nextFloat() - this.rand.nextFloat()) * 0.7F + 1.0F) * 2.0F);
309 par1EntityPlayer.onItemPickup(this, var2);
310
311 if (this.item.stackSize <= 0)
312 {
313 this.setDead();
314 }
315 }
316 }
317 }
318
319 /**
320 * Gets the username of the entity.
321 */
322 public String getEntityName()
323 {
324 return StatCollector.translateToLocal("item." + this.item.getItemName());
325 }
326
327 /**
328 * If returns false, the item will not inflict any damage against entities.
329 */
330 public boolean canAttackWithItem()
331 {
332 return false;
333 }
334 }